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Diffstat (limited to 'src/libs/xpcom18a4/nsprpub/pr/include/prio.h')
| -rw-r--r-- | src/libs/xpcom18a4/nsprpub/pr/include/prio.h | 2107 |
1 files changed, 2107 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/nsprpub/pr/include/prio.h b/src/libs/xpcom18a4/nsprpub/pr/include/prio.h new file mode 100644 index 00000000..908a88d3 --- /dev/null +++ b/src/libs/xpcom18a4/nsprpub/pr/include/prio.h @@ -0,0 +1,2107 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0/LGPL 2.1 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is the Netscape Portable Runtime (NSPR). + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 1998-2000 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * + * Alternatively, the contents of this file may be used under the terms of + * either the GNU General Public License Version 2 or later (the "GPL"), or + * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), + * in which case the provisions of the GPL or the LGPL are applicable instead + * of those above. If you wish to allow use of your version of this file only + * under the terms of either the GPL or the LGPL, and not to allow others to + * use your version of this file under the terms of the MPL, indicate your + * decision by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL or the LGPL. If you do not delete + * the provisions above, a recipient may use your version of this file under + * the terms of any one of the MPL, the GPL or the LGPL. + * + * ***** END LICENSE BLOCK ***** */ + +/* + * File: prio.h + * + * Description: PR i/o related stuff, such as file system access, file + * i/o, socket i/o, etc. + */ + +#ifndef prio_h___ +#define prio_h___ + +#include "prlong.h" +#include "prtime.h" +#include "prinrval.h" +#include "prinet.h" + +#ifdef VBOX_WITH_XPCOM_NAMESPACE_CLEANUP +#define PR_GetInheritedFD VBoxNsprPR_GetInheritedFD +#define PR_SetFDInheritable VBoxNsprPR_SetFDInheritable +#define PR_Access VBoxNsprPR_Access +#define PR_Open VBoxNsprPR_Open +#define PR_Read VBoxNsprPR_Read +#define PR_Write VBoxNsprPR_Write +#define PR_Seek VBoxNsprPR_Seek +#define PR_Seek64 VBoxNsprPR_Seek64 +#define PR_Poll VBoxNsprPR_Poll +#define PR_NewPollableEvent VBoxNsprPR_NewPollableEvent +#define PR_SetPollableEvent VBoxNsprPR_SetPollableEvent +#define PR_WaitForPollableEvent VBoxNsprPR_WaitForPollableEvent +#define PR_DestroyPollableEvent VBoxNsprPR_DestroyPollableEvent +#define PR_Close VBoxNsprPR_Close +#define PR_GetSpecialFD VBoxNsprPR_GetSpecialFD +#define PR_Connect VBoxNsprPR_Connect +#define PR_OpenTCPSocket VBoxNsprPR_OpenTCPSocket +#define PR_SetSocketOption VBoxNsprPR_SetSocketOption +#define PR_Bind VBoxNsprPR_Bind +#define PR_Listen VBoxNsprPR_Listen +#define PR_Accept VBoxNsprPR_Accept +#define PR_AcceptRead VBoxNsprPR_AcceptRead +#define PR_OpenDir VBoxNsprPR_OpenDir +#define PR_ReadDir VBoxNsprPR_ReadDir +#define PR_CloseDir VBoxNsprPR_CloseDir +#define PR_CreatePipe VBoxNsprPR_CreatePipe +#define PR_GetDescType VBoxNsprPR_GetDescType +#define PR_GetSpecialFD VBoxNsprPR_GetSpecialFD +#define PR_GetUniqueIdentity VBoxNsprPR_GetUniqueIdentity +#define PR_GetNameForIdentity VBoxNsprPR_GetNameForIdentity +#define PR_GetLayersIdentity VBoxNsprPR_GetLayersIdentity +#define PR_GetIdentitiesLayer VBoxNsprPR_GetIdentitiesLayer +#define PR_GetDefaultIOMethods VBoxNsprPR_GetDefaultIOMethods +#define PR_CreateIOLayerStub VBoxNsprPR_CreateIOLayerStub +#define PR_CreateIOLayer VBoxNsprPR_CreateIOLayer +#define PR_PushIOLayer VBoxNsprPR_PushIOLayer +#define PR_PopIOLayer VBoxNsprPR_PopIOLayer +#define PR_OpenFile VBoxNsprPR_OpenFile +#define PR_Writev VBoxNsprPR_Writev +#define PR_Delete VBoxNsprPR_Delete +#define PR_Rename VBoxNsprPR_Rename +#define PR_GetFileInfo VBoxNsprPR_GetFileInfo +#define PR_GetFileInfo64 VBoxNsprPR_GetFileInfo64 +#define PR_GetOpenFileInfo VBoxNsprPR_GetOpenFileInfo +#define PR_GetOpenFileInfo64 VBoxNsprPR_GetOpenFileInfo64 +#define PR_Available VBoxNsprPR_Available +#define PR_Available64 VBoxNsprPR_Available64 +#define PR_Sync VBoxNsprPR_Sync +#define PR_MkDir VBoxNsprPR_MkDir +#define PR_MakeDir VBoxNsprPR_MakeDir +#define PR_RmDir VBoxNsprPR_RmDir +#define PR_NewUDPSocket VBoxNsprPR_NewUDPSocket +#define PR_NewTCPSocket VBoxNsprPR_NewTCPSocket +#define PR_OpenUDPSocket VBoxNsprPR_OpenUDPSocket +#define PR_OpenTCPSocket VBoxNsprPR_OpenTCPSocket +#define PR_ConnectContinue VBoxNsprPR_ConnectContinue +#define PR_GetConnectStatus VBoxNsprPR_GetConnectStatus +#define PR_Shutdown VBoxNsprPR_Shutdown +#define PR_Recv VBoxNsprPR_Recv +#define PR_Send VBoxNsprPR_Send +#define PR_RecvFrom VBoxNsprPR_RecvFrom +#define PR_SendTo VBoxNsprPR_SendTo +#define PR_TransmitFile VBoxNsprPR_TransmitFile +#define PR_SendFile VBoxNsprPR_SendFile +#define PR_NewTCPSocketPair VBoxNsprPR_NewTCPSocketPair +#define PR_GetSockName VBoxNsprPR_GetSockName +#define PR_GetPeerName VBoxNsprPR_GetPeerName +#define PR_GetSocketOption VBoxNsprPR_GetSocketOption +#define PR_CreateFileMap VBoxNsprPR_CreateFileMap +#define PR_GetMemMapAlignment VBoxNsprPR_GetMemMapAlignment +#define PR_MemMap VBoxNsprPR_MemMap +#define PR_MemUnmap VBoxNsprPR_MemUnmap +#define PR_CloseFileMap VBoxNsprPR_CloseFileMap +#define PR_CreatePipe VBoxNsprPR_CreatePipe +#endif /* VBOX_WITH_XPCOM_NAMESPACE_CLEANUP */ + +PR_BEGIN_EXTERN_C + +/* Typedefs */ +typedef struct PRDir PRDir; +typedef struct PRDirEntry PRDirEntry; +#ifdef MOZ_UNICODE +typedef struct PRDirUTF16 PRDirUTF16; +typedef struct PRDirEntryUTF16 PRDirEntryUTF16; +#endif /* MOZ_UNICODE */ +typedef struct PRFileDesc PRFileDesc; +typedef struct PRFileInfo PRFileInfo; +typedef struct PRFileInfo64 PRFileInfo64; +typedef union PRNetAddr PRNetAddr; +typedef struct PRIOMethods PRIOMethods; +typedef struct PRPollDesc PRPollDesc; +typedef struct PRFilePrivate PRFilePrivate; +typedef struct PRSendFileData PRSendFileData; + +/* +*************************************************************************** +** The file descriptor. +** This is the primary structure to represent any active open socket, +** whether it be a normal file or a network connection. Such objects +** are stackable (or layerable). Each layer may have its own set of +** method pointers and context private to that layer. All each layer +** knows about its neighbors is how to get to their method table. +*************************************************************************** +*/ + +typedef PRIntn PRDescIdentity; /* see: Layering file descriptors */ + +struct PRFileDesc { + const PRIOMethods *methods; /* the I/O methods table */ + PRFilePrivate *secret; /* layer dependent data */ + PRFileDesc *lower, *higher; /* pointers to adjacent layers */ + void (PR_CALLBACK *dtor)(PRFileDesc *fd); + /* A destructor function for layer */ + PRDescIdentity identity; /* Identity of this particular layer */ +}; + +/* +*************************************************************************** +** PRTransmitFileFlags +** +** Flags for PR_TransmitFile. Pass PR_TRANSMITFILE_CLOSE_SOCKET to +** PR_TransmitFile if the connection should be closed after the file +** is transmitted. +*************************************************************************** +*/ +typedef enum PRTransmitFileFlags { + PR_TRANSMITFILE_KEEP_OPEN = 0, /* socket is left open after file + * is transmitted. */ + PR_TRANSMITFILE_CLOSE_SOCKET = 1 /* socket is closed after file + * is transmitted. */ +} PRTransmitFileFlags; + +/* +************************************************************************** +** Macros for PRNetAddr +** +** Address families: PR_AF_INET, PR_AF_INET6, PR_AF_LOCAL +** IP addresses: PR_INADDR_ANY, PR_INADDR_LOOPBACK, PR_INADDR_BROADCAST +************************************************************************** +*/ + +#ifdef WIN32 + +#define PR_AF_INET 2 +#define PR_AF_LOCAL 1 +#define PR_INADDR_ANY (unsigned long)0x00000000 +#define PR_INADDR_LOOPBACK 0x7f000001 +#define PR_INADDR_BROADCAST (unsigned long)0xffffffff + +#else /* WIN32 */ + +#define PR_AF_INET AF_INET +#define PR_AF_LOCAL AF_UNIX +#define PR_INADDR_ANY INADDR_ANY +#define PR_INADDR_LOOPBACK INADDR_LOOPBACK +#define PR_INADDR_BROADCAST INADDR_BROADCAST + +#endif /* WIN32 */ + +/* +** Define PR_AF_INET6 in prcpucfg.h with the same +** value as AF_INET6 on platforms with IPv6 support. +** Otherwise define it here. +*/ +#ifndef PR_AF_INET6 +#define PR_AF_INET6 100 +#endif + +#ifndef PR_AF_UNSPEC +#define PR_AF_UNSPEC 0 +#endif + +/* +************************************************************************** +** A network address +** +** Only Internet Protocol (IPv4 and IPv6) addresses are supported. +** The address family must always represent IPv4 (AF_INET, probably == 2) +** or IPv6 (AF_INET6). +************************************************************************** +*************************************************************************/ + +struct PRIPv6Addr { + union { + PRUint8 _S6_u8[16]; + PRUint16 _S6_u16[8]; + PRUint32 _S6_u32[4]; + PRUint64 _S6_u64[2]; + } _S6_un; +}; +#define pr_s6_addr _S6_un._S6_u8 +#define pr_s6_addr16 _S6_un._S6_u16 +#define pr_s6_addr32 _S6_un._S6_u32 +#define pr_s6_addr64 _S6_un._S6_u64 + +typedef struct PRIPv6Addr PRIPv6Addr; + +union PRNetAddr { + struct { + PRUint16 family; /* address family (0x00ff maskable) */ +#ifdef XP_BEOS + char data[10]; /* Be has a smaller structure */ +#else + char data[14]; /* raw address data */ +#endif + } raw; + struct { + PRUint16 family; /* address family (AF_INET) */ + PRUint16 port; /* port number */ + PRUint32 ip; /* The actual 32 bits of address */ +#ifdef XP_BEOS + char pad[4]; /* Be has a smaller structure */ +#else + char pad[8]; +#endif + } inet; + struct { + PRUint16 family; /* address family (AF_INET6) */ + PRUint16 port; /* port number */ + PRUint32 flowinfo; /* routing information */ + PRIPv6Addr ip; /* the actual 128 bits of address */ + PRUint32 scope_id; /* set of interfaces for a scope */ + } ipv6; +#if defined(XP_UNIX) || defined(XP_OS2_EMX) + struct { /* Unix domain socket address */ + PRUint16 family; /* address family (AF_UNIX) */ +#ifdef XP_OS2 + char path[108]; /* null-terminated pathname */ + /* bind fails if size is not 108. */ +#else + char path[104]; /* null-terminated pathname */ +#endif + } local; +#endif +}; + +/* +*************************************************************************** +** PRSockOption +** +** The file descriptors can have predefined options set after they file +** descriptor is created to change their behavior. Only the options in +** the following enumeration are supported. +*************************************************************************** +*/ +typedef enum PRSockOption +{ + PR_SockOpt_Nonblocking, /* nonblocking io */ + PR_SockOpt_Linger, /* linger on close if data present */ + PR_SockOpt_Reuseaddr, /* allow local address reuse */ + PR_SockOpt_Keepalive, /* keep connections alive */ + PR_SockOpt_RecvBufferSize, /* send buffer size */ + PR_SockOpt_SendBufferSize, /* receive buffer size */ + + PR_SockOpt_IpTimeToLive, /* time to live */ + PR_SockOpt_IpTypeOfService, /* type of service and precedence */ + + PR_SockOpt_AddMember, /* add an IP group membership */ + PR_SockOpt_DropMember, /* drop an IP group membership */ + PR_SockOpt_McastInterface, /* multicast interface address */ + PR_SockOpt_McastTimeToLive, /* multicast timetolive */ + PR_SockOpt_McastLoopback, /* multicast loopback */ + + PR_SockOpt_NoDelay, /* don't delay send to coalesce packets */ + PR_SockOpt_MaxSegment, /* maximum segment size */ + PR_SockOpt_Broadcast, /* enable broadcast */ + PR_SockOpt_Last +} PRSockOption; + +typedef struct PRLinger { + PRBool polarity; /* Polarity of the option's setting */ + PRIntervalTime linger; /* Time to linger before closing */ +} PRLinger; + +typedef struct PRMcastRequest { + PRNetAddr mcaddr; /* IP multicast address of group */ + PRNetAddr ifaddr; /* local IP address of interface */ +} PRMcastRequest; + +typedef struct PRSocketOptionData +{ + PRSockOption option; + union + { + PRUintn ip_ttl; /* IP time to live */ + PRUintn mcast_ttl; /* IP multicast time to live */ + PRUintn tos; /* IP type of service and precedence */ + PRBool non_blocking; /* Non-blocking (network) I/O */ + PRBool reuse_addr; /* Allow local address reuse */ + PRBool keep_alive; /* Keep connections alive */ + PRBool mcast_loopback; /* IP multicast loopback */ + PRBool no_delay; /* Don't delay send to coalesce packets */ + PRBool broadcast; /* Enable broadcast */ + PRSize max_segment; /* Maximum segment size */ + PRSize recv_buffer_size; /* Receive buffer size */ + PRSize send_buffer_size; /* Send buffer size */ + PRLinger linger; /* Time to linger on close if data present */ + PRMcastRequest add_member; /* add an IP group membership */ + PRMcastRequest drop_member; /* Drop an IP group membership */ + PRNetAddr mcast_if; /* multicast interface address */ + } value; +} PRSocketOptionData; + +/* +*************************************************************************** +** PRIOVec +** +** The I/O vector is used by the write vector method to describe the areas +** that are affected by the ouput operation. +*************************************************************************** +*/ +typedef struct PRIOVec { + char *iov_base; + int iov_len; +} PRIOVec; + +/* +*************************************************************************** +** Discover what type of socket is being described by the file descriptor. +*************************************************************************** +*/ +typedef enum PRDescType +{ + PR_DESC_FILE = 1, + PR_DESC_SOCKET_TCP = 2, + PR_DESC_SOCKET_UDP = 3, + PR_DESC_LAYERED = 4, + PR_DESC_PIPE = 5 +} PRDescType; + +typedef enum PRSeekWhence { + PR_SEEK_SET = 0, + PR_SEEK_CUR = 1, + PR_SEEK_END = 2 +} PRSeekWhence; + +NSPR_API(PRDescType) PR_GetDescType(PRFileDesc *file); + +/* +*************************************************************************** +** PRIOMethods +** +** The I/O methods table provides procedural access to the functions of +** the file descriptor. It is the responsibility of a layer implementor +** to provide suitable functions at every entry point. If a layer provides +** no functionality, it should call the next lower(higher) function of the +** same name (e.g., return fd->lower->method->close(fd->lower)); +** +** Not all functions are implemented for all types of files. In cases where +** that is true, the function will return a error indication with an error +** code of PR_INVALID_METHOD_ERROR. +*************************************************************************** +*/ + +typedef PRStatus (PR_CALLBACK *PRCloseFN)(PRFileDesc *fd); +typedef PRInt32 (PR_CALLBACK *PRReadFN)(PRFileDesc *fd, void *buf, PRInt32 amount); +typedef PRInt32 (PR_CALLBACK *PRWriteFN)(PRFileDesc *fd, const void *buf, PRInt32 amount); +typedef PRInt32 (PR_CALLBACK *PRAvailableFN)(PRFileDesc *fd); +typedef PRInt64 (PR_CALLBACK *PRAvailable64FN)(PRFileDesc *fd); +typedef PRStatus (PR_CALLBACK *PRFsyncFN)(PRFileDesc *fd); +typedef PROffset32 (PR_CALLBACK *PRSeekFN)(PRFileDesc *fd, PROffset32 offset, PRSeekWhence how); +typedef PROffset64 (PR_CALLBACK *PRSeek64FN)(PRFileDesc *fd, PROffset64 offset, PRSeekWhence how); +typedef PRStatus (PR_CALLBACK *PRFileInfoFN)(PRFileDesc *fd, PRFileInfo *info); +typedef PRStatus (PR_CALLBACK *PRFileInfo64FN)(PRFileDesc *fd, PRFileInfo64 *info); +typedef PRInt32 (PR_CALLBACK *PRWritevFN)( + PRFileDesc *fd, const PRIOVec *iov, PRInt32 iov_size, + PRIntervalTime timeout); +typedef PRStatus (PR_CALLBACK *PRConnectFN)( + PRFileDesc *fd, const PRNetAddr *addr, PRIntervalTime timeout); +typedef PRFileDesc* (PR_CALLBACK *PRAcceptFN) ( + PRFileDesc *fd, PRNetAddr *addr, PRIntervalTime timeout); +typedef PRStatus (PR_CALLBACK *PRBindFN)(PRFileDesc *fd, const PRNetAddr *addr); +typedef PRStatus (PR_CALLBACK *PRListenFN)(PRFileDesc *fd, PRIntn backlog); +typedef PRStatus (PR_CALLBACK *PRShutdownFN)(PRFileDesc *fd, PRIntn how); +typedef PRInt32 (PR_CALLBACK *PRRecvFN)( + PRFileDesc *fd, void *buf, PRInt32 amount, + PRIntn flags, PRIntervalTime timeout); +typedef PRInt32 (PR_CALLBACK *PRSendFN) ( + PRFileDesc *fd, const void *buf, PRInt32 amount, + PRIntn flags, PRIntervalTime timeout); +typedef PRInt32 (PR_CALLBACK *PRRecvfromFN)( + PRFileDesc *fd, void *buf, PRInt32 amount, + PRIntn flags, PRNetAddr *addr, PRIntervalTime timeout); +typedef PRInt32 (PR_CALLBACK *PRSendtoFN)( + PRFileDesc *fd, const void *buf, PRInt32 amount, + PRIntn flags, const PRNetAddr *addr, PRIntervalTime timeout); +typedef PRInt16 (PR_CALLBACK *PRPollFN)( + PRFileDesc *fd, PRInt16 in_flags, PRInt16 *out_flags); +typedef PRInt32 (PR_CALLBACK *PRAcceptreadFN)( + PRFileDesc *sd, PRFileDesc **nd, PRNetAddr **raddr, + void *buf, PRInt32 amount, PRIntervalTime t); +typedef PRInt32 (PR_CALLBACK *PRTransmitfileFN)( + PRFileDesc *sd, PRFileDesc *fd, const void *headers, + PRInt32 hlen, PRTransmitFileFlags flags, PRIntervalTime t); +typedef PRStatus (PR_CALLBACK *PRGetsocknameFN)(PRFileDesc *fd, PRNetAddr *addr); +typedef PRStatus (PR_CALLBACK *PRGetpeernameFN)(PRFileDesc *fd, PRNetAddr *addr); +typedef PRStatus (PR_CALLBACK *PRGetsocketoptionFN)( + PRFileDesc *fd, PRSocketOptionData *data); +typedef PRStatus (PR_CALLBACK *PRSetsocketoptionFN)( + PRFileDesc *fd, const PRSocketOptionData *data); +typedef PRInt32 (PR_CALLBACK *PRSendfileFN)( + PRFileDesc *networkSocket, PRSendFileData *sendData, + PRTransmitFileFlags flags, PRIntervalTime timeout); +typedef PRStatus (PR_CALLBACK *PRConnectcontinueFN)( + PRFileDesc *fd, PRInt16 out_flags); +typedef PRIntn (PR_CALLBACK *PRReservedFN)(PRFileDesc *fd); + +struct PRIOMethods { + PRDescType file_type; /* Type of file represented (tos) */ + PRCloseFN close; /* close file and destroy descriptor */ + PRReadFN read; /* read up to specified bytes into buffer */ + PRWriteFN write; /* write specified bytes from buffer */ + PRAvailableFN available; /* determine number of bytes available */ + PRAvailable64FN available64; /* ditto, 64 bit */ + PRFsyncFN fsync; /* flush all buffers to permanent store */ + PRSeekFN seek; /* position the file to the desired place */ + PRSeek64FN seek64; /* ditto, 64 bit */ + PRFileInfoFN fileInfo; /* Get information about an open file */ + PRFileInfo64FN fileInfo64; /* ditto, 64 bit */ + PRWritevFN writev; /* Write segments as described by iovector */ + PRConnectFN connect; /* Connect to the specified (net) address */ + PRAcceptFN accept; /* Accept a connection for a (net) peer */ + PRBindFN bind; /* Associate a (net) address with the fd */ + PRListenFN listen; /* Prepare to listen for (net) connections */ + PRShutdownFN shutdown; /* Shutdown a (net) connection */ + PRRecvFN recv; /* Solicit up the the specified bytes */ + PRSendFN send; /* Send all the bytes specified */ + PRRecvfromFN recvfrom; /* Solicit (net) bytes and report source */ + PRSendtoFN sendto; /* Send bytes to (net) address specified */ + PRPollFN poll; /* Test the fd to see if it is ready */ + PRAcceptreadFN acceptread; /* Accept and read on a new (net) fd */ + PRTransmitfileFN transmitfile; /* Transmit at entire file */ + PRGetsocknameFN getsockname; /* Get (net) address associated with fd */ + PRGetpeernameFN getpeername; /* Get peer's (net) address */ + PRReservedFN reserved_fn_6; /* reserved for future use */ + PRReservedFN reserved_fn_5; /* reserved for future use */ + PRGetsocketoptionFN getsocketoption; + /* Get current setting of specified option */ + PRSetsocketoptionFN setsocketoption; + /* Set value of specified option */ + PRSendfileFN sendfile; /* Send a (partial) file with header/trailer*/ + PRConnectcontinueFN connectcontinue; + /* Continue a nonblocking connect */ + PRReservedFN reserved_fn_3; /* reserved for future use */ + PRReservedFN reserved_fn_2; /* reserved for future use */ + PRReservedFN reserved_fn_1; /* reserved for future use */ + PRReservedFN reserved_fn_0; /* reserved for future use */ +}; + +/* + ************************************************************************** + * FUNCTION: PR_GetSpecialFD + * DESCRIPTION: Get the file descriptor that represents the standard input, + * output, or error stream. + * INPUTS: + * PRSpecialFD id + * A value indicating the type of stream desired: + * PR_StandardInput: standard input + * PR_StandardOuput: standard output + * PR_StandardError: standard error + * OUTPUTS: none + * RETURNS: PRFileDesc * + * If the argument is valid, PR_GetSpecialFD returns a file descriptor + * that represents the corresponding standard I/O stream. Otherwise, + * PR_GetSpecialFD returns NULL and sets error PR_INVALID_ARGUMENT_ERROR. + ************************************************************************** + */ + +typedef enum PRSpecialFD +{ + PR_StandardInput, /* standard input */ + PR_StandardOutput, /* standard output */ + PR_StandardError /* standard error */ +} PRSpecialFD; + +NSPR_API(PRFileDesc*) PR_GetSpecialFD(PRSpecialFD id); + +#define PR_STDIN PR_GetSpecialFD(PR_StandardInput) +#define PR_STDOUT PR_GetSpecialFD(PR_StandardOutput) +#define PR_STDERR PR_GetSpecialFD(PR_StandardError) + +/* + ************************************************************************** + * Layering file descriptors + * + * File descriptors may be layered. Each layer has it's own identity. + * Identities are allocated by the runtime and are to be associated + * (by the layer implementor) with all layers that are of that type. + * It is then possible to scan the chain of layers and find a layer + * that one recongizes and therefore predict that it will implement + * a desired protocol. + * + * There are three well-known identities: + * PR_INVALID_IO_LAYER => an invalid layer identity, for error return + * PR_TOP_IO_LAYER => the identity of the top of the stack + * PR_NSPR_IO_LAYER => the identity used by NSPR proper + * PR_TOP_IO_LAYER may be used as a shorthand for identifying the topmost + * layer of an existing stack. Ie., the following two constructs are + * equivalent. + * + * rv = PR_PushIOLayer(stack, PR_TOP_IO_LAYER, my_layer); + * rv = PR_PushIOLayer(stack, PR_GetLayersIdentity(stack), my_layer) + * + * A string may be associated with the creation of the identity. It + * will be copied by the runtime. If queried the runtime will return + * a reference to that copied string (not yet another copy). There + * is no facility for deleting an identity. + ************************************************************************** + */ + +#define PR_IO_LAYER_HEAD (PRDescIdentity)-3 +#define PR_INVALID_IO_LAYER (PRDescIdentity)-1 +#define PR_TOP_IO_LAYER (PRDescIdentity)-2 +#define PR_NSPR_IO_LAYER (PRDescIdentity)0 + +NSPR_API(PRDescIdentity) PR_GetUniqueIdentity(const char *layer_name); +NSPR_API(const char*) PR_GetNameForIdentity(PRDescIdentity ident); +NSPR_API(PRDescIdentity) PR_GetLayersIdentity(PRFileDesc* fd); +NSPR_API(PRFileDesc*) PR_GetIdentitiesLayer(PRFileDesc* fd_stack, PRDescIdentity id); + +/* + ************************************************************************** + * PR_GetDefaultIOMethods: Accessing the default methods table. + * You may get a pointer to the default methods table by calling this function. + * You may then select any elements from that table with which to build your + * layer's methods table. You may NOT modify the table directly. + ************************************************************************** + */ +NSPR_API(const PRIOMethods *) PR_GetDefaultIOMethods(void); + +/* + ************************************************************************** + * Creating a layer + * + * A new layer may be allocated by calling PR_CreateIOLayerStub(). The + * file descriptor returned will contain the pointer to the methods table + * provided. The runtime will not modify the table nor test its correctness. + ************************************************************************** + */ +NSPR_API(PRFileDesc*) PR_CreateIOLayerStub( + PRDescIdentity ident, const PRIOMethods *methods); + +/* + ************************************************************************** + * Creating a layer + * + * A new stack may be created by calling PR_CreateIOLayer(). The + * file descriptor returned will point to the top of the stack, which has + * the layer 'fd' as the topmost layer. + * + * NOTE: This function creates a new style stack, which has a fixed, dummy + * header. The old style stack, created by a call to PR_PushIOLayer, + * results in modifying contents of the top layer of the stack, when + * pushing and popping layers of the stack. + ************************************************************************** + */ +NSPR_API(PRFileDesc*) PR_CreateIOLayer(PRFileDesc* fd); + +/* + ************************************************************************** + * Pushing a layer + * + * A file descriptor (perhaps allocated using PR_CreateIOLayerStub()) may + * be pushed into an existing stack of file descriptors at any point the + * caller deems appropriate. The new layer will be inserted into the stack + * just above the layer with the indicated identity. + * + * Note: Even if the identity parameter indicates the top-most layer of + * the stack, the value of the file descriptor describing the original + * stack will not change. + ************************************************************************** + */ +NSPR_API(PRStatus) PR_PushIOLayer( + PRFileDesc *fd_stack, PRDescIdentity id, PRFileDesc *layer); + +/* + ************************************************************************** + * Popping a layer + * + * A layer may be popped from a stack by indicating the identity of the + * layer to be removed. If found, a pointer to the removed object will + * be returned to the caller. The object then becomes the responsibility + * of the caller. + * + * Note: Even if the identity indicates the top layer of the stack, the + * reference returned will not be the file descriptor for the stack and + * that file descriptor will remain valid. + ************************************************************************** + */ +NSPR_API(PRFileDesc*) PR_PopIOLayer(PRFileDesc *fd_stack, PRDescIdentity id); + +/* + ************************************************************************** + * FUNCTION: PR_Open + * DESCRIPTION: Open a file for reading, writing, or both. + * INPUTS: + * const char *name + * The path name of the file to be opened + * PRIntn flags + * The file status flags. + * It is a bitwise OR of the following bit flags (only one of + * the first three flags below may be used): + * PR_RDONLY Open for reading only. + * PR_WRONLY Open for writing only. + * PR_RDWR Open for reading and writing. + * PR_CREATE_FILE If the file does not exist, the file is created + * If the file exists, this flag has no effect. + * PR_SYNC If set, each write will wait for both the file data + * and file status to be physically updated. + * PR_APPEND The file pointer is set to the end of + * the file prior to each write. + * PR_TRUNCATE If the file exists, its length is truncated to 0. + * PR_EXCL With PR_CREATE_FILE, if the file does not exist, + * the file is created. If the file already + * exists, no action and NULL is returned + * + * PRIntn mode + * The access permission bits of the file mode, if the file is + * created when PR_CREATE_FILE is on. + * OUTPUTS: None + * RETURNS: PRFileDesc * + * If the file is successfully opened, + * returns a pointer to the PRFileDesc + * created for the newly opened file. + * Returns a NULL pointer if the open + * failed. + * SIDE EFFECTS: + * RESTRICTIONS: + * MEMORY: + * The return value, if not NULL, points to a dynamically allocated + * PRFileDesc object. + * ALGORITHM: + ************************************************************************** + */ + +/* Open flags */ +#define PR_RDONLY 0x01 +#define PR_WRONLY 0x02 +#define PR_RDWR 0x04 +#define PR_CREATE_FILE 0x08 +#define PR_APPEND 0x10 +#define PR_TRUNCATE 0x20 +#define PR_SYNC 0x40 +#define PR_EXCL 0x80 + +/* +** File modes .... +** +** CAVEAT: 'mode' is currently only applicable on UNIX platforms. +** The 'mode' argument may be ignored by PR_Open on other platforms. +** +** 00400 Read by owner. +** 00200 Write by owner. +** 00100 Execute (search if a directory) by owner. +** 00040 Read by group. +** 00020 Write by group. +** 00010 Execute by group. +** 00004 Read by others. +** 00002 Write by others +** 00001 Execute by others. +** +*/ + +NSPR_API(PRFileDesc*) PR_Open(const char *name, PRIntn flags, PRIntn mode); + +/* + ************************************************************************** + * FUNCTION: PR_OpenFile + * DESCRIPTION: + * Open a file for reading, writing, or both. + * PR_OpenFile has the same prototype as PR_Open but implements + * the specified file mode where possible. + ************************************************************************** + */ + +/* File mode bits */ +#define PR_IRWXU 00700 /* read, write, execute/search by owner */ +#define PR_IRUSR 00400 /* read permission, owner */ +#define PR_IWUSR 00200 /* write permission, owner */ +#define PR_IXUSR 00100 /* execute/search permission, owner */ +#define PR_IRWXG 00070 /* read, write, execute/search by group */ +#define PR_IRGRP 00040 /* read permission, group */ +#define PR_IWGRP 00020 /* write permission, group */ +#define PR_IXGRP 00010 /* execute/search permission, group */ +#define PR_IRWXO 00007 /* read, write, execute/search by others */ +#define PR_IROTH 00004 /* read permission, others */ +#define PR_IWOTH 00002 /* write permission, others */ +#define PR_IXOTH 00001 /* execute/search permission, others */ + +NSPR_API(PRFileDesc*) PR_OpenFile( + const char *name, PRIntn flags, PRIntn mode); + +#ifdef MOZ_UNICODE +/* + * EXPERIMENTAL: This function may be removed in a future release. + */ +NSPR_API(PRFileDesc*) PR_OpenFileUTF16( + const PRUnichar *name, PRIntn flags, PRIntn mode); +#endif /* MOZ_UNICODE */ + +/* + ************************************************************************** + * FUNCTION: PR_Close + * DESCRIPTION: + * Close a file or socket. + * INPUTS: + * PRFileDesc *fd + * a pointer to a PRFileDesc. + * OUTPUTS: + * None. + * RETURN: + * PRStatus + * SIDE EFFECTS: + * RESTRICTIONS: + * None. + * MEMORY: + * The dynamic memory pointed to by the argument fd is freed. + ************************************************************************** + */ + +NSPR_API(PRStatus) PR_Close(PRFileDesc *fd); + +/* + ************************************************************************** + * FUNCTION: PR_Read + * DESCRIPTION: + * Read bytes from a file or socket. + * The operation will block until either an end of stream indication is + * encountered, some positive number of bytes are transferred, or there + * is an error. No more than 'amount' bytes will be transferred. + * INPUTS: + * PRFileDesc *fd + * pointer to the PRFileDesc object for the file or socket + * void *buf + * pointer to a buffer to hold the data read in. + * PRInt32 amount + * the size of 'buf' (in bytes) + * OUTPUTS: + * RETURN: + * PRInt32 + * a positive number indicates the number of bytes actually read in. + * 0 means end of file is reached or the network connection is closed. + * -1 indicates a failure. The reason for the failure is obtained + * by calling PR_GetError(). + * SIDE EFFECTS: + * data is written into the buffer pointed to by 'buf'. + * RESTRICTIONS: + * None. + * MEMORY: + * N/A + * ALGORITHM: + * N/A + ************************************************************************** + */ + +NSPR_API(PRInt32) PR_Read(PRFileDesc *fd, void *buf, PRInt32 amount); + +/* + *************************************************************************** + * FUNCTION: PR_Write + * DESCRIPTION: + * Write a specified number of bytes to a file or socket. The thread + * invoking this function blocks until all the data is written. + * INPUTS: + * PRFileDesc *fd + * pointer to a PRFileDesc object that refers to a file or socket + * const void *buf + * pointer to the buffer holding the data + * PRInt32 amount + * amount of data in bytes to be written from the buffer + * OUTPUTS: + * None. + * RETURN: PRInt32 + * A positive number indicates the number of bytes successfully written. + * A -1 is an indication that the operation failed. The reason + * for the failure is obtained by calling PR_GetError(). + *************************************************************************** + */ + +NSPR_API(PRInt32) PR_Write(PRFileDesc *fd,const void *buf,PRInt32 amount); + +/* + *************************************************************************** + * FUNCTION: PR_Writev + * DESCRIPTION: + * Write data to a socket. The data is organized in a PRIOVec array. The + * operation will block until all the data is written or the operation + * fails. + * INPUTS: + * PRFileDesc *fd + * Pointer that points to a PRFileDesc object for a socket. + * const PRIOVec *iov + * An array of PRIOVec. PRIOVec is a struct with the following + * two fields: + * char *iov_base; + * int iov_len; + * PRInt32 iov_size + * Number of elements in the iov array. The value of this + * argument must not be greater than PR_MAX_IOVECTOR_SIZE. + * If it is, the method will fail (PR_BUFFER_OVERFLOW_ERROR). + * PRIntervalTime timeout + * Time limit for completion of the entire write operation. + * OUTPUTS: + * None + * RETURN: + * A positive number indicates the number of bytes successfully written. + * A -1 is an indication that the operation failed. The reason + * for the failure is obtained by calling PR_GetError(). + *************************************************************************** + */ + +#define PR_MAX_IOVECTOR_SIZE 16 /* 'iov_size' must be <= */ + +NSPR_API(PRInt32) PR_Writev( + PRFileDesc *fd, const PRIOVec *iov, PRInt32 iov_size, + PRIntervalTime timeout); + +/* + *************************************************************************** + * FUNCTION: PR_Delete + * DESCRIPTION: + * Delete a file from the filesystem. The operation may fail if the + * file is open. + * INPUTS: + * const char *name + * Path name of the file to be deleted. + * OUTPUTS: + * None. + * RETURN: PRStatus + * The function returns PR_SUCCESS if the file is successfully + * deleted, otherwise it returns PR_FAILURE. + *************************************************************************** + */ + +NSPR_API(PRStatus) PR_Delete(const char *name); + +/**************************************************************************/ + +typedef enum PRFileType +{ + PR_FILE_FILE = 1, + PR_FILE_DIRECTORY = 2, + PR_FILE_OTHER = 3 +} PRFileType; + +struct PRFileInfo { + PRFileType type; /* Type of file */ + PROffset32 size; /* Size, in bytes, of file's contents */ + PRTime creationTime; /* Creation time per definition of PRTime */ + PRTime modifyTime; /* Last modification time per definition of PRTime */ +}; + +struct PRFileInfo64 { + PRFileType type; /* Type of file */ + PROffset64 size; /* Size, in bytes, of file's contents */ + PRTime creationTime; /* Creation time per definition of PRTime */ + PRTime modifyTime; /* Last modification time per definition of PRTime */ +}; + +/**************************************************************************** + * FUNCTION: PR_GetFileInfo, PR_GetFileInfo64 + * DESCRIPTION: + * Get the information about the file with the given path name. This is + * applicable only to NSFileDesc describing 'file' types (see + * INPUTS: + * const char *fn + * path name of the file + * OUTPUTS: + * PRFileInfo *info + * Information about the given file is written into the file + * information object pointer to by 'info'. + * RETURN: PRStatus + * PR_GetFileInfo returns PR_SUCCESS if file information is successfully + * obtained, otherwise it returns PR_FAILURE. + *************************************************************************** + */ + +NSPR_API(PRStatus) PR_GetFileInfo(const char *fn, PRFileInfo *info); +NSPR_API(PRStatus) PR_GetFileInfo64(const char *fn, PRFileInfo64 *info); + +#ifdef MOZ_UNICODE +/* + * EXPERIMENTAL: This function may be removed in a future release. + */ +NSPR_API(PRStatus) PR_GetFileInfo64UTF16(const PRUnichar *fn, PRFileInfo64 *info); +#endif /* MOZ_UNICODE */ + +/* + ************************************************************************** + * FUNCTION: PR_GetOpenFileInfo, PR_GetOpenFileInfo64 + * DESCRIPTION: + * Get information about an open file referred to by the + * given PRFileDesc object. + * INPUTS: + * const PRFileDesc *fd + * A reference to a valid, open file. + * OUTPUTS: + * Same as PR_GetFileInfo, PR_GetFileInfo64 + * RETURN: PRStatus + * PR_GetFileInfo returns PR_SUCCESS if file information is successfully + * obtained, otherwise it returns PR_FAILURE. + *************************************************************************** + */ + +NSPR_API(PRStatus) PR_GetOpenFileInfo(PRFileDesc *fd, PRFileInfo *info); +NSPR_API(PRStatus) PR_GetOpenFileInfo64(PRFileDesc *fd, PRFileInfo64 *info); + +/* + ************************************************************************** + * FUNCTION: PR_Rename + * DESCRIPTION: + * Rename a file from the old name 'from' to the new name 'to'. + * INPUTS: + * const char *from + * The old name of the file to be renamed. + * const char *to + * The new name of the file. + * OUTPUTS: + * None. + * RETURN: PRStatus + ************************************************************************** + */ + +NSPR_API(PRStatus) PR_Rename(const char *from, const char *to); + +/* + ************************************************************************* + * FUNCTION: PR_Access + * DESCRIPTION: + * Determine accessibility of a file. + * INPUTS: + * const char *name + * path name of the file + * PRAccessHow how + * specifies which access permission to check for. + * It can be one of the following values: + * PR_ACCESS_READ_OK Test for read permission + * PR_ACCESS_WRITE_OK Test for write permission + * PR_ACCESS_EXISTS Check existence of file + * OUTPUTS: + * None. + * RETURN: PRStatus + * PR_SUCCESS is returned if the requested access is permitted. + * Otherwise, PR_FAILURE is returned. Additional information + * regarding the reason for the failure may be retrieved from + * PR_GetError(). + ************************************************************************* + */ + +typedef enum PRAccessHow { + PR_ACCESS_EXISTS = 1, + PR_ACCESS_WRITE_OK = 2, + PR_ACCESS_READ_OK = 3 +} PRAccessHow; + +NSPR_API(PRStatus) PR_Access(const char *name, PRAccessHow how); + +/* + ************************************************************************* + * FUNCTION: PR_Seek, PR_Seek64 + * DESCRIPTION: + * Moves read-write file offset + * INPUTS: + * PRFileDesc *fd + * Pointer to a PRFileDesc object. + * PROffset32, PROffset64 offset + * Specifies a value, in bytes, that is used in conjunction + * with the 'whence' parameter to set the file pointer. A + * negative value causes seeking in the reverse direction. + * PRSeekWhence whence + * Specifies how to interpret the 'offset' parameter in setting + * the file pointer associated with the 'fd' parameter. + * Values for the 'whence' parameter are: + * PR_SEEK_SET Sets the file pointer to the value of the + * 'offset' parameter + * PR_SEEK_CUR Sets the file pointer to its current location + * plus the value of the offset parameter. + * PR_SEEK_END Sets the file pointer to the size of the + * file plus the value of the offset parameter. + * OUTPUTS: + * None. + * RETURN: PROffset32, PROffset64 + * Upon successful completion, the resulting pointer location, + * measured in bytes from the beginning of the file, is returned. + * If the PR_Seek() function fails, the file offset remains + * unchanged, and the returned value is -1. The error code can + * then be retrieved via PR_GetError(). + ************************************************************************* + */ + +NSPR_API(PROffset32) PR_Seek(PRFileDesc *fd, PROffset32 offset, PRSeekWhence whence); +NSPR_API(PROffset64) PR_Seek64(PRFileDesc *fd, PROffset64 offset, PRSeekWhence whence); + +/* + ************************************************************************ + * FUNCTION: PR_Available + * DESCRIPTION: + * Determine the amount of data in bytes available for reading + * in the given file or socket. + * INPUTS: + * PRFileDesc *fd + * Pointer to a PRFileDesc object that refers to a file or + * socket. + * OUTPUTS: + * None + * RETURN: PRInt32, PRInt64 + * Upon successful completion, PR_Available returns the number of + * bytes beyond the current read pointer that is available for + * reading. Otherwise, it returns a -1 and the reason for the + * failure can be retrieved via PR_GetError(). + ************************************************************************ + */ + +NSPR_API(PRInt32) PR_Available(PRFileDesc *fd); +NSPR_API(PRInt64) PR_Available64(PRFileDesc *fd); + +/* + ************************************************************************ + * FUNCTION: PR_Sync + * DESCRIPTION: + * Sync any buffered data for a fd to its backing device (disk). + * INPUTS: + * PRFileDesc *fd + * Pointer to a PRFileDesc object that refers to a file or + * socket + * OUTPUTS: + * None + * RETURN: PRStatus + * PR_SUCCESS is returned if the requested access is permitted. + * Otherwise, PR_FAILURE is returned. + ************************************************************************ + */ + +NSPR_API(PRStatus) PR_Sync(PRFileDesc *fd); + +/************************************************************************/ + +struct PRDirEntry { + const char *name; /* name of entry, relative to directory name */ +}; + +#ifdef MOZ_UNICODE +struct PRDirEntryUTF16 { + const PRUnichar *name; /* name of entry in UTF16, relative to + * directory name */ +}; +#endif /* MOZ_UNICODE */ + +#if !defined(NO_NSPR_10_SUPPORT) +#define PR_DirName(dirEntry) (dirEntry->name) +#endif + +/* + ************************************************************************* + * FUNCTION: PR_OpenDir + * DESCRIPTION: + * Open the directory by the given name + * INPUTS: + * const char *name + * path name of the directory to be opened + * OUTPUTS: + * None + * RETURN: PRDir * + * If the directory is sucessfully opened, a PRDir object is + * dynamically allocated and a pointer to it is returned. + * If the directory cannot be opened, a NULL pointer is returned. + * MEMORY: + * Upon successful completion, the return value points to + * dynamically allocated memory. + ************************************************************************* + */ + +NSPR_API(PRDir*) PR_OpenDir(const char *name); + +#ifdef MOZ_UNICODE +/* + * EXPERIMENTAL: This function may be removed in a future release. + */ +NSPR_API(PRDirUTF16*) PR_OpenDirUTF16(const PRUnichar *name); +#endif /* MOZ_UNICODE */ + +/* + ************************************************************************* + * FUNCTION: PR_ReadDir + * DESCRIPTION: + * INPUTS: + * PRDir *dir + * pointer to a PRDir object that designates an open directory + * PRDirFlags flags + * PR_SKIP_NONE Do not skip any files + * PR_SKIP_DOT Skip the directory entry "." that + * represents the current directory + * PR_SKIP_DOT_DOT Skip the directory entry ".." that + * represents the parent directory. + * PR_SKIP_BOTH Skip both '.' and '..' + * PR_SKIP_HIDDEN Skip hidden files + * OUTPUTS: + * RETURN: PRDirEntry* + * Returns a pointer to the next entry in the directory. Returns + * a NULL pointer upon reaching the end of the directory or when an + * error occurs. The actual reason can be retrieved via PR_GetError(). + ************************************************************************* + */ + +typedef enum PRDirFlags { + PR_SKIP_NONE = 0x0, + PR_SKIP_DOT = 0x1, + PR_SKIP_DOT_DOT = 0x2, + PR_SKIP_BOTH = 0x3, + PR_SKIP_HIDDEN = 0x4 +} PRDirFlags; + +NSPR_API(PRDirEntry*) PR_ReadDir(PRDir *dir, PRDirFlags flags); + +#ifdef MOZ_UNICODE +/* + * EXPERIMENTAL: This function may be removed in a future release. + */ +NSPR_API(PRDirEntryUTF16*) PR_ReadDirUTF16(PRDirUTF16 *dir, PRDirFlags flags); +#endif /* MOZ_UNICODE */ + +/* + ************************************************************************* + * FUNCTION: PR_CloseDir + * DESCRIPTION: + * Close the specified directory. + * INPUTS: + * PRDir *dir + * The directory to be closed. + * OUTPUTS: + * None + * RETURN: PRStatus + * If successful, will return a status of PR_SUCCESS. Otherwise + * a value of PR_FAILURE. The reason for the failure may be re- + * trieved using PR_GetError(). + ************************************************************************* + */ + +NSPR_API(PRStatus) PR_CloseDir(PRDir *dir); + +#ifdef MOZ_UNICODE +/* + * EXPERIMENTAL: This function may be removed in a future release. + */ +NSPR_API(PRStatus) PR_CloseDirUTF16(PRDirUTF16 *dir); +#endif /* MOZ_UNICODE */ + +/* + ************************************************************************* + * FUNCTION: PR_MkDir + * DESCRIPTION: + * Create a new directory with the given name and access mode. + * INPUTS: + * const char *name + * The name of the directory to be created. All the path components + * up to but not including the leaf component must already exist. + * PRIntn mode + * See 'mode' definiton in PR_Open(). + * OUTPUTS: + * None + * RETURN: PRStatus + * If successful, will return a status of PR_SUCCESS. Otherwise + * a value of PR_FAILURE. The reason for the failure may be re- + * trieved using PR_GetError(). + ************************************************************************* + */ + +NSPR_API(PRStatus) PR_MkDir(const char *name, PRIntn mode); + +/* + ************************************************************************* + * FUNCTION: PR_MakeDir + * DESCRIPTION: + * Create a new directory with the given name and access mode. + * PR_MakeDir has the same prototype as PR_MkDir but implements + * the specified access mode where possible. + ************************************************************************* + */ + +NSPR_API(PRStatus) PR_MakeDir(const char *name, PRIntn mode); + +/* + ************************************************************************* + * FUNCTION: PR_RmDir + * DESCRIPTION: + * Remove a directory by the given name. + * INPUTS: + * const char *name + * The name of the directory to be removed. All the path components + * must already exist. Only the leaf component will be removed. + * OUTPUTS: + * None + * RETURN: PRStatus + * If successful, will return a status of PR_SUCCESS. Otherwise + * a value of PR_FAILURE. The reason for the failure may be re- + * trieved using PR_GetError(). + ************************************************************************** + */ + +NSPR_API(PRStatus) PR_RmDir(const char *name); + +/* + ************************************************************************* + * FUNCTION: PR_NewUDPSocket + * DESCRIPTION: + * Create a new UDP socket. + * INPUTS: + * None + * OUTPUTS: + * None + * RETURN: PRFileDesc* + * Upon successful completion, PR_NewUDPSocket returns a pointer + * to the PRFileDesc created for the newly opened UDP socket. + * Returns a NULL pointer if the creation of a new UDP socket failed. + * + ************************************************************************** + */ + +NSPR_API(PRFileDesc*) PR_NewUDPSocket(void); + +/* + ************************************************************************* + * FUNCTION: PR_NewTCPSocket + * DESCRIPTION: + * Create a new TCP socket. + * INPUTS: + * None + * OUTPUTS: + * None + * RETURN: PRFileDesc* + * Upon successful completion, PR_NewTCPSocket returns a pointer + * to the PRFileDesc created for the newly opened TCP socket. + * Returns a NULL pointer if the creation of a new TCP socket failed. + * + ************************************************************************** + */ + +NSPR_API(PRFileDesc*) PR_NewTCPSocket(void); + +/* + ************************************************************************* + * FUNCTION: PR_OpenUDPSocket + * DESCRIPTION: + * Create a new UDP socket of the specified address family. + * INPUTS: + * PRIntn af + * Address family + * OUTPUTS: + * None + * RETURN: PRFileDesc* + * Upon successful completion, PR_OpenUDPSocket returns a pointer + * to the PRFileDesc created for the newly opened UDP socket. + * Returns a NULL pointer if the creation of a new UDP socket failed. + * + ************************************************************************** + */ + +NSPR_API(PRFileDesc*) PR_OpenUDPSocket(PRIntn af); + +/* + ************************************************************************* + * FUNCTION: PR_OpenTCPSocket + * DESCRIPTION: + * Create a new TCP socket of the specified address family. + * INPUTS: + * PRIntn af + * Address family + * OUTPUTS: + * None + * RETURN: PRFileDesc* + * Upon successful completion, PR_NewTCPSocket returns a pointer + * to the PRFileDesc created for the newly opened TCP socket. + * Returns a NULL pointer if the creation of a new TCP socket failed. + * + ************************************************************************** + */ + +NSPR_API(PRFileDesc*) PR_OpenTCPSocket(PRIntn af); + +/* + ************************************************************************* + * FUNCTION: PR_Connect + * DESCRIPTION: + * Initiate a connection on a socket. + * INPUTS: + * PRFileDesc *fd + * Points to a PRFileDesc object representing a socket + * PRNetAddr *addr + * Specifies the address of the socket in its own communication + * space. + * PRIntervalTime timeout + * Time limit for completion of the connect operation. + * OUTPUTS: + * None + * RETURN: PRStatus + * Upon successful completion of connection initiation, PR_Connect + * returns PR_SUCCESS. Otherwise, it returns PR_FAILURE. Further + * failure information can be obtained by calling PR_GetError(). + ************************************************************************** + */ + +NSPR_API(PRStatus) PR_Connect( + PRFileDesc *fd, const PRNetAddr *addr, PRIntervalTime timeout); + +/* + ************************************************************************* + * FUNCTION: PR_ConnectContinue + * DESCRIPTION: + * Continue a nonblocking connect. After a nonblocking connect + * is initiated with PR_Connect() (which fails with + * PR_IN_PROGRESS_ERROR), one should call PR_Poll() on the socket, + * with the in_flags PR_POLL_WRITE | PR_POLL_EXCEPT. When + * PR_Poll() returns, one calls PR_ConnectContinue() on the + * socket to determine whether the nonblocking connect has + * completed or is still in progress. Repeat the PR_Poll(), + * PR_ConnectContinue() sequence until the nonblocking connect + * has completed. + * INPUTS: + * PRFileDesc *fd + * the file descriptor representing a socket + * PRInt16 out_flags + * the out_flags field of the poll descriptor returned by + * PR_Poll() + * RETURN: PRStatus + * If the nonblocking connect has successfully completed, + * PR_ConnectContinue returns PR_SUCCESS. If PR_ConnectContinue() + * returns PR_FAILURE, call PR_GetError(): + * - PR_IN_PROGRESS_ERROR: the nonblocking connect is still in + * progress and has not completed yet. The caller should poll + * on the file descriptor for the in_flags + * PR_POLL_WRITE|PR_POLL_EXCEPT and retry PR_ConnectContinue + * later when PR_Poll() returns. + * - Other errors: the nonblocking connect has failed with this + * error code. + */ + +NSPR_API(PRStatus) PR_ConnectContinue(PRFileDesc *fd, PRInt16 out_flags); + +/* + ************************************************************************* + * THIS FUNCTION IS DEPRECATED. USE PR_ConnectContinue INSTEAD. + * + * FUNCTION: PR_GetConnectStatus + * DESCRIPTION: + * Get the completion status of a nonblocking connect. After + * a nonblocking connect is initiated with PR_Connect() (which + * fails with PR_IN_PROGRESS_ERROR), one should call PR_Poll() + * on the socket, with the in_flags PR_POLL_WRITE | PR_POLL_EXCEPT. + * When PR_Poll() returns, one calls PR_GetConnectStatus on the + * PRPollDesc structure to determine whether the nonblocking + * connect has succeeded or failed. + * INPUTS: + * const PRPollDesc *pd + * Pointer to a PRPollDesc whose fd member is the socket, + * and in_flags must contain PR_POLL_WRITE and PR_POLL_EXCEPT. + * PR_Poll() should have been called and set the out_flags. + * RETURN: PRStatus + * If the nonblocking connect has successfully completed, + * PR_GetConnectStatus returns PR_SUCCESS. If PR_GetConnectStatus() + * returns PR_FAILURE, call PR_GetError(): + * - PR_IN_PROGRESS_ERROR: the nonblocking connect is still in + * progress and has not completed yet. + * - Other errors: the nonblocking connect has failed with this + * error code. + */ + +NSPR_API(PRStatus) PR_GetConnectStatus(const PRPollDesc *pd); + +/* + ************************************************************************* + * FUNCTION: PR_Accept + * DESCRIPTION: + * Accept a connection on a socket. + * INPUTS: + * PRFileDesc *fd + * Points to a PRFileDesc object representing the rendezvous socket + * on which the caller is willing to accept new connections. + * PRIntervalTime timeout + * Time limit for completion of the accept operation. + * OUTPUTS: + * PRNetAddr *addr + * Returns the address of the connecting entity in its own + * communication space. It may be NULL. + * RETURN: PRFileDesc* + * Upon successful acceptance of a connection, PR_Accept + * returns a valid file descriptor. Otherwise, it returns NULL. + * Further failure information can be obtained by calling PR_GetError(). + ************************************************************************** + */ + +NSPR_API(PRFileDesc*) PR_Accept( + PRFileDesc *fd, PRNetAddr *addr, PRIntervalTime timeout); + +/* + ************************************************************************* + * FUNCTION: PR_Bind + * DESCRIPTION: + * Bind an address to a socket. + * INPUTS: + * PRFileDesc *fd + * Points to a PRFileDesc object representing a socket. + * PRNetAddr *addr + * Specifies the address to which the socket will be bound. + * OUTPUTS: + * None + * RETURN: PRStatus + * Upon successful binding of an address to a socket, PR_Bind + * returns PR_SUCCESS. Otherwise, it returns PR_FAILURE. Further + * failure information can be obtained by calling PR_GetError(). + ************************************************************************** + */ + +NSPR_API(PRStatus) PR_Bind(PRFileDesc *fd, const PRNetAddr *addr); + +/* + ************************************************************************* + * FUNCTION: PR_Listen + * DESCRIPTION: + * Listen for connections on a socket. + * INPUTS: + * PRFileDesc *fd + * Points to a PRFileDesc object representing a socket that will be + * used to listen for new connections. + * PRIntn backlog + * Specifies the maximum length of the queue of pending connections. + * OUTPUTS: + * None + * RETURN: PRStatus + * Upon successful completion of listen request, PR_Listen + * returns PR_SUCCESS. Otherwise, it returns PR_FAILURE. Further + * failure information can be obtained by calling PR_GetError(). + ************************************************************************** + */ + +NSPR_API(PRStatus) PR_Listen(PRFileDesc *fd, PRIntn backlog); + +/* + ************************************************************************* + * FUNCTION: PR_Shutdown + * DESCRIPTION: + * Shut down part of a full-duplex connection on a socket. + * INPUTS: + * PRFileDesc *fd + * Points to a PRFileDesc object representing a connected socket. + * PRIntn how + * Specifies the kind of disallowed operations on the socket. + * PR_SHUTDOWN_RCV - Further receives will be disallowed + * PR_SHUTDOWN_SEND - Further sends will be disallowed + * PR_SHUTDOWN_BOTH - Further sends and receives will be disallowed + * OUTPUTS: + * None + * RETURN: PRStatus + * Upon successful completion of shutdown request, PR_Shutdown + * returns PR_SUCCESS. Otherwise, it returns PR_FAILURE. Further + * failure information can be obtained by calling PR_GetError(). + ************************************************************************** + */ + +typedef enum PRShutdownHow +{ + PR_SHUTDOWN_RCV = 0, /* disallow further receives */ + PR_SHUTDOWN_SEND = 1, /* disallow further sends */ + PR_SHUTDOWN_BOTH = 2 /* disallow further receives and sends */ +} PRShutdownHow; + +NSPR_API(PRStatus) PR_Shutdown(PRFileDesc *fd, PRShutdownHow how); + +/* + ************************************************************************* + * FUNCTION: PR_Recv + * DESCRIPTION: + * Receive a specified number of bytes from a connected socket. + * The operation will block until some positive number of bytes are + * transferred, a time out has occurred, or there is an error. + * No more than 'amount' bytes will be transferred. + * INPUTS: + * PRFileDesc *fd + * points to a PRFileDesc object representing a socket. + * void *buf + * pointer to a buffer to hold the data received. + * PRInt32 amount + * the size of 'buf' (in bytes) + * PRIntn flags + * must be zero or PR_MSG_PEEK. + * PRIntervalTime timeout + * Time limit for completion of the receive operation. + * OUTPUTS: + * None + * RETURN: PRInt32 + * a positive number indicates the number of bytes actually received. + * 0 means the network connection is closed. + * -1 indicates a failure. The reason for the failure is obtained + * by calling PR_GetError(). + ************************************************************************** + */ + +#define PR_MSG_PEEK 0x2 + +NSPR_API(PRInt32) PR_Recv(PRFileDesc *fd, void *buf, PRInt32 amount, + PRIntn flags, PRIntervalTime timeout); + +/* + ************************************************************************* + * FUNCTION: PR_Send + * DESCRIPTION: + * Send a specified number of bytes from a connected socket. + * The operation will block until all bytes are + * processed, a time out has occurred, or there is an error. + * INPUTS: + * PRFileDesc *fd + * points to a PRFileDesc object representing a socket. + * void *buf + * pointer to a buffer from where the data is sent. + * PRInt32 amount + * the size of 'buf' (in bytes) + * PRIntn flags + * (OBSOLETE - must always be zero) + * PRIntervalTime timeout + * Time limit for completion of the send operation. + * OUTPUTS: + * None + * RETURN: PRInt32 + * A positive number indicates the number of bytes successfully processed. + * This number must always equal 'amount'. A -1 is an indication that the + * operation failed. The reason for the failure is obtained by calling + * PR_GetError(). + ************************************************************************** + */ + +NSPR_API(PRInt32) PR_Send(PRFileDesc *fd, const void *buf, PRInt32 amount, + PRIntn flags, PRIntervalTime timeout); + +/* + ************************************************************************* + * FUNCTION: PR_RecvFrom + * DESCRIPTION: + * Receive up to a specified number of bytes from socket which may + * or may not be connected. + * The operation will block until one or more bytes are + * transferred, a time out has occurred, or there is an error. + * No more than 'amount' bytes will be transferred. + * INPUTS: + * PRFileDesc *fd + * points to a PRFileDesc object representing a socket. + * void *buf + * pointer to a buffer to hold the data received. + * PRInt32 amount + * the size of 'buf' (in bytes) + * PRIntn flags + * (OBSOLETE - must always be zero) + * PRNetAddr *addr + * Specifies the address of the sending peer. It may be NULL. + * PRIntervalTime timeout + * Time limit for completion of the receive operation. + * OUTPUTS: + * None + * RETURN: PRInt32 + * a positive number indicates the number of bytes actually received. + * 0 means the network connection is closed. + * -1 indicates a failure. The reason for the failure is obtained + * by calling PR_GetError(). + ************************************************************************** + */ + +NSPR_API(PRInt32) PR_RecvFrom( + PRFileDesc *fd, void *buf, PRInt32 amount, PRIntn flags, + PRNetAddr *addr, PRIntervalTime timeout); + +/* + ************************************************************************* + * FUNCTION: PR_SendTo + * DESCRIPTION: + * Send a specified number of bytes from an unconnected socket. + * The operation will block until all bytes are + * sent, a time out has occurred, or there is an error. + * INPUTS: + * PRFileDesc *fd + * points to a PRFileDesc object representing an unconnected socket. + * void *buf + * pointer to a buffer from where the data is sent. + * PRInt32 amount + * the size of 'buf' (in bytes) + * PRIntn flags + * (OBSOLETE - must always be zero) + * PRNetAddr *addr + * Specifies the address of the peer. +.* PRIntervalTime timeout + * Time limit for completion of the send operation. + * OUTPUTS: + * None + * RETURN: PRInt32 + * A positive number indicates the number of bytes successfully sent. + * -1 indicates a failure. The reason for the failure is obtained + * by calling PR_GetError(). + ************************************************************************** + */ + +NSPR_API(PRInt32) PR_SendTo( + PRFileDesc *fd, const void *buf, PRInt32 amount, PRIntn flags, + const PRNetAddr *addr, PRIntervalTime timeout); + +/* +************************************************************************* +** FUNCTION: PR_TransmitFile +** DESCRIPTION: +** Transmitfile sends a complete file (sourceFile) across a socket +** (networkSocket). If headers is non-NULL, the headers will be sent across +** the socket prior to sending the file. +** +** Optionally, the PR_TRANSMITFILE_CLOSE_SOCKET flag may be passed to +** transmitfile. This flag specifies that transmitfile should close the +** socket after sending the data. +** +** INPUTS: +** PRFileDesc *networkSocket +** The socket to send data over +** PRFileDesc *sourceFile +** The file to send +** const void *headers +** A pointer to headers to be sent before sending data +** PRInt32 hlen +** length of header buffers in bytes. +** PRTransmitFileFlags flags +** If the flags indicate that the connection should be closed, +** it will be done immediately after transferring the file, unless +** the operation is unsuccessful. +.* PRIntervalTime timeout + * Time limit for completion of the transmit operation. +** +** RETURNS: +** Returns the number of bytes written or -1 if the operation failed. +** If an error occurs while sending the file, the PR_TRANSMITFILE_CLOSE_ +** SOCKET flag is ignored. The reason for the failure is obtained +** by calling PR_GetError(). +************************************************************************** +*/ + +NSPR_API(PRInt32) PR_TransmitFile( + PRFileDesc *networkSocket, PRFileDesc *sourceFile, + const void *headers, PRInt32 hlen, PRTransmitFileFlags flags, + PRIntervalTime timeout); + +/* +************************************************************************* +** FUNCTION: PR_SendFile +** DESCRIPTION: +** PR_SendFile sends data from a file (sendData->fd) across a socket +** (networkSocket). If specified, a header and/or trailer buffer are sent +** before and after the file, respectively. The file offset, number of bytes +** of file data to send, the header and trailer buffers are specified in the +** sendData argument. +** +** Optionally, if the PR_TRANSMITFILE_CLOSE_SOCKET flag is passed, the +** socket is closed after successfully sending the data. +** +** INPUTS: +** PRFileDesc *networkSocket +** The socket to send data over +** PRSendFileData *sendData +** Contains the FD, file offset and length, header and trailer +** buffer specifications. +** PRTransmitFileFlags flags +** If the flags indicate that the connection should be closed, +** it will be done immediately after transferring the file, unless +** the operation is unsuccessful. +.* PRIntervalTime timeout + * Time limit for completion of the send operation. +** +** RETURNS: +** Returns the number of bytes written or -1 if the operation failed. +** If an error occurs while sending the file, the PR_TRANSMITFILE_CLOSE_ +** SOCKET flag is ignored. The reason for the failure is obtained +** by calling PR_GetError(). +************************************************************************** +*/ + +struct PRSendFileData { + PRFileDesc *fd; /* file to send */ + PRUint32 file_offset; /* file offset */ + PRSize file_nbytes; /* number of bytes of file data to send */ + /* if 0, send data from file_offset to */ + /* end-of-file. */ + const void *header; /* header buffer */ + PRInt32 hlen; /* header len */ + const void *trailer; /* trailer buffer */ + PRInt32 tlen; /* trailer len */ +}; + + +NSPR_API(PRInt32) PR_SendFile( + PRFileDesc *networkSocket, PRSendFileData *sendData, + PRTransmitFileFlags flags, PRIntervalTime timeout); + +/* +************************************************************************* +** FUNCTION: PR_AcceptRead +** DESCRIPTION: +** AcceptRead accepts a new connection, returns the newly created +** socket's descriptor and also returns the connecting peer's address. +** AcceptRead, as its name suggests, also receives the first block of data +** sent by the peer. +** +** INPUTS: +** PRFileDesc *listenSock +** A socket descriptor that has been called with the PR_Listen() +** function, also known as the rendezvous socket. +** void *buf +** A pointer to a buffer to receive data sent by the client. This +** buffer must be large enough to receive <amount> bytes of data +** and two PRNetAddr structures, plus an extra 32 bytes. See: +** PR_ACCEPT_READ_BUF_OVERHEAD. +** PRInt32 amount +** The number of bytes of client data to receive. Does not include +** the size of the PRNetAddr structures. If 0, no data will be read +** from the client. +** PRIntervalTime timeout +** The timeout interval only applies to the read portion of the +** operation. PR_AcceptRead will block indefinitely until the +** connection is accepted; the read will timeout after the timeout +** interval elapses. +** OUTPUTS: +** PRFileDesc **acceptedSock +** The file descriptor for the newly connected socket. This parameter +** will only be valid if the function return does not indicate failure. +** PRNetAddr **peerAddr, +** The address of the remote socket. This parameter will only be +** valid if the function return does not indicate failure. The +** returned address is not guaranteed to be properly aligned. +** +** RETURNS: +** The number of bytes read from the client or -1 on failure. The reason +** for the failure is obtained by calling PR_GetError(). +************************************************************************** +**/ +/* define buffer overhead constant. Add this value to the user's +** data length when allocating a buffer to accept data. +** Example: +** #define USER_DATA_SIZE 10 +** char buf[USER_DATA_SIZE + PR_ACCEPT_READ_BUF_OVERHEAD]; +** bytesRead = PR_AcceptRead( s, fd, &a, &p, USER_DATA_SIZE, ...); +*/ +#define PR_ACCEPT_READ_BUF_OVERHEAD (32+(2*sizeof(PRNetAddr))) + +NSPR_API(PRInt32) PR_AcceptRead( + PRFileDesc *listenSock, PRFileDesc **acceptedSock, + PRNetAddr **peerAddr, void *buf, PRInt32 amount, PRIntervalTime timeout); + +/* +************************************************************************* +** FUNCTION: PR_NewTCPSocketPair +** DESCRIPTION: +** Create a new TCP socket pair. The returned descriptors can be used +** interchangeably; they are interconnected full-duplex descriptors: data +** written to one can be read from the other and vice-versa. +** +** INPUTS: +** None +** OUTPUTS: +** PRFileDesc *fds[2] +** The file descriptor pair for the newly created TCP sockets. +** RETURN: PRStatus +** Upon successful completion of TCP socket pair, PR_NewTCPSocketPair +** returns PR_SUCCESS. Otherwise, it returns PR_FAILURE. Further +** failure information can be obtained by calling PR_GetError(). +** XXX can we implement this on windoze and mac? +************************************************************************** +**/ +NSPR_API(PRStatus) PR_NewTCPSocketPair(PRFileDesc *fds[2]); + +/* +************************************************************************* +** FUNCTION: PR_GetSockName +** DESCRIPTION: +** Get socket name. Return the network address for this socket. +** +** INPUTS: +** PRFileDesc *fd +** Points to a PRFileDesc object representing the socket. +** OUTPUTS: +** PRNetAddr *addr +** Returns the address of the socket in its own communication space. +** RETURN: PRStatus +** Upon successful completion, PR_GetSockName returns PR_SUCCESS. +** Otherwise, it returns PR_FAILURE. Further failure information can +** be obtained by calling PR_GetError(). +************************************************************************** +**/ +NSPR_API(PRStatus) PR_GetSockName(PRFileDesc *fd, PRNetAddr *addr); + +/* +************************************************************************* +** FUNCTION: PR_GetPeerName +** DESCRIPTION: +** Get name of the connected peer. Return the network address for the +** connected peer socket. +** +** INPUTS: +** PRFileDesc *fd +** Points to a PRFileDesc object representing the connected peer. +** OUTPUTS: +** PRNetAddr *addr +** Returns the address of the connected peer in its own communication +** space. +** RETURN: PRStatus +** Upon successful completion, PR_GetPeerName returns PR_SUCCESS. +** Otherwise, it returns PR_FAILURE. Further failure information can +** be obtained by calling PR_GetError(). +************************************************************************** +**/ +NSPR_API(PRStatus) PR_GetPeerName(PRFileDesc *fd, PRNetAddr *addr); + +NSPR_API(PRStatus) PR_GetSocketOption( + PRFileDesc *fd, PRSocketOptionData *data); + +NSPR_API(PRStatus) PR_SetSocketOption( + PRFileDesc *fd, const PRSocketOptionData *data); + +/* + ********************************************************************* + * + * File descriptor inheritance + * + ********************************************************************* + */ + +/* + ************************************************************************ + * FUNCTION: PR_SetFDInheritable + * DESCRIPTION: + * Set the inheritance attribute of a file descriptor. + * + * INPUTS: + * PRFileDesc *fd + * Points to a PRFileDesc object. + * PRBool inheritable + * If PR_TRUE, the file descriptor fd is set to be inheritable + * by a child process. If PR_FALSE, the file descriptor is set + * to be not inheritable by a child process. + * RETURN: PRStatus + * Upon successful completion, PR_SetFDInheritable returns PR_SUCCESS. + * Otherwise, it returns PR_FAILURE. Further failure information can + * be obtained by calling PR_GetError(). + ************************************************************************* + */ +NSPR_API(PRStatus) PR_SetFDInheritable( + PRFileDesc *fd, + PRBool inheritable); + +/* + ************************************************************************ + * FUNCTION: PR_GetInheritedFD + * DESCRIPTION: + * Get an inherited file descriptor with the specified name. + * + * INPUTS: + * const char *name + * The name of the inherited file descriptor. + * RETURN: PRFileDesc * + * Upon successful completion, PR_GetInheritedFD returns the + * inherited file descriptor with the specified name. Otherwise, + * it returns NULL. Further failure information can be obtained + * by calling PR_GetError(). + ************************************************************************* + */ +NSPR_API(PRFileDesc *) PR_GetInheritedFD(const char *name); + +/* + ********************************************************************* + * + * Memory-mapped files + * + ********************************************************************* + */ + +typedef struct PRFileMap PRFileMap; + +/* + * protection options for read and write accesses of a file mapping + */ +typedef enum PRFileMapProtect { + PR_PROT_READONLY, /* read only */ + PR_PROT_READWRITE, /* readable, and write is shared */ + PR_PROT_WRITECOPY /* readable, and write is private (copy-on-write) */ +} PRFileMapProtect; + +NSPR_API(PRFileMap *) PR_CreateFileMap( + PRFileDesc *fd, + PRInt64 size, + PRFileMapProtect prot); + +/* + * return the alignment (in bytes) of the offset argument to PR_MemMap + */ +NSPR_API(PRInt32) PR_GetMemMapAlignment(void); + +NSPR_API(void *) PR_MemMap( + PRFileMap *fmap, + PROffset64 offset, /* must be aligned and sized according to the + * return value of PR_GetMemMapAlignment() */ + PRUint32 len); + +NSPR_API(PRStatus) PR_MemUnmap(void *addr, PRUint32 len); + +NSPR_API(PRStatus) PR_CloseFileMap(PRFileMap *fmap); + +/* + ****************************************************************** + * + * Interprocess communication + * + ****************************************************************** + */ + +/* + * Creates an anonymous pipe and returns file descriptors for the + * read and write ends of the pipe. + */ + +NSPR_API(PRStatus) PR_CreatePipe( + PRFileDesc **readPipe, + PRFileDesc **writePipe +); + +/************************************************************************/ +/************** The following definitions are for poll ******************/ +/************************************************************************/ + +struct PRPollDesc { + PRFileDesc* fd; + PRInt16 in_flags; + PRInt16 out_flags; +}; + +/* +** Bit values for PRPollDesc.in_flags or PRPollDesc.out_flags. Binary-or +** these together to produce the desired poll request. +*/ + +#if defined(_PR_POLL_BACKCOMPAT) + +#include <poll.h> +#define PR_POLL_READ POLLIN +#define PR_POLL_WRITE POLLOUT +#define PR_POLL_EXCEPT POLLPRI +#define PR_POLL_ERR POLLERR /* only in out_flags */ +#define PR_POLL_NVAL POLLNVAL /* only in out_flags when fd is bad */ +#define PR_POLL_HUP POLLHUP /* only in out_flags */ + +#else /* _PR_POLL_BACKCOMPAT */ + +#define PR_POLL_READ 0x1 +#define PR_POLL_WRITE 0x2 +#define PR_POLL_EXCEPT 0x4 +#define PR_POLL_ERR 0x8 /* only in out_flags */ +#define PR_POLL_NVAL 0x10 /* only in out_flags when fd is bad */ +#define PR_POLL_HUP 0x20 /* only in out_flags */ + +#endif /* _PR_POLL_BACKCOMPAT */ + +/* +************************************************************************* +** FUNCTION: PR_Poll +** DESCRIPTION: +** +** The call returns as soon as I/O is ready on one or more of the underlying +** socket objects. A count of the number of ready descriptors is +** returned unless a timeout occurs in which case zero is returned. +** +** PRPollDesc.fd should be set to a pointer to a PRFileDesc object +** representing a socket. This field can be set to NULL to indicate to +** PR_Poll that this PRFileDesc object should be ignored. +** PRPollDesc.in_flags should be set to the desired request +** (read/write/except or some combination). Upon successful return from +** this call PRPollDesc.out_flags will be set to indicate what kind of +** i/o can be performed on the respective descriptor. PR_Poll() uses the +** out_flags fields as scratch variables during the call. If PR_Poll() +** returns 0 or -1, the out_flags fields do not contain meaningful values +** and must not be used. +** +** INPUTS: +** PRPollDesc *pds A pointer to an array of PRPollDesc +** +** PRIntn npds The number of elements in the array +** If this argument is zero PR_Poll is +** equivalent to a PR_Sleep(timeout). +** +** PRIntervalTime timeout Amount of time the call will block waiting +** for I/O to become ready. If this time expires +** w/o any I/O becoming ready, the result will +** be zero. +** +** OUTPUTS: None +** RETURN: +** PRInt32 Number of PRPollDesc's with events or zero +** if the function timed out or -1 on failure. +** The reason for the failure is obtained by +** calling PR_GetError(). +************************************************************************** +*/ +NSPR_API(PRInt32) PR_Poll( + PRPollDesc *pds, PRIntn npds, PRIntervalTime timeout); + +/* +************************************************************************** +** +** Pollable events +** +** A pollable event is a special kind of file descriptor. +** The only I/O operation you can perform on a pollable event +** is to poll it with the PR_POLL_READ flag. You can't +** read from or write to a pollable event. +** +** The purpose of a pollable event is to combine event waiting +** with I/O waiting in a single PR_Poll call. Pollable events +** are implemented using a pipe or a pair of TCP sockets +** connected via the loopback address, therefore setting and +** waiting for pollable events are expensive operating system +** calls. Do not use pollable events for general thread +** synchronization. Use condition variables instead. +** +** A pollable event has two states: set and unset. Events +** are not queued, so there is no notion of an event count. +** A pollable event is either set or unset. +** +** A new pollable event is created by a PR_NewPollableEvent +** call and is initially in the unset state. +** +** PR_WaitForPollableEvent blocks the calling thread until +** the pollable event is set, and then it atomically unsets +** the pollable event before it returns. +** +** To set a pollable event, call PR_SetPollableEvent. +** +** One can call PR_Poll with the PR_POLL_READ flag on a pollable +** event. When the pollable event is set, PR_Poll returns with +** the PR_POLL_READ flag set in the out_flags. +** +** To close a pollable event, call PR_DestroyPollableEvent +** (not PR_Close). +** +************************************************************************** +*/ + +NSPR_API(PRFileDesc *) PR_NewPollableEvent(void); + +NSPR_API(PRStatus) PR_DestroyPollableEvent(PRFileDesc *event); + +NSPR_API(PRStatus) PR_SetPollableEvent(PRFileDesc *event); + +NSPR_API(PRStatus) PR_WaitForPollableEvent(PRFileDesc *event); + +PR_END_EXTERN_C + +#endif /* prio_h___ */ |