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/* ath.h - Thread-safeness library.
Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of Libgcrypt.
Libgcrypt is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
Libgcrypt is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with Libgcrypt; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#ifndef ATH_H
#define ATH_H
#include <config.h>
#ifdef _WIN32
# include <windows.h>
#else /* !_WIN32 */
# ifdef HAVE_SYS_SELECT_H
# include <sys/select.h>
# else
# include <sys/time.h>
# endif
# include <sys/types.h>
# ifdef HAVE_SYS_MSG_H
# include <sys/msg.h> /* (e.g. for zOS) */
# endif
# include <sys/socket.h>
#endif /* !_WIN32 */
#include <gpg-error.h>
/* Define _ATH_EXT_SYM_PREFIX if you want to give all external symbols
a prefix. */
#define _ATH_EXT_SYM_PREFIX _gcry_
#ifdef _ATH_EXT_SYM_PREFIX
#define _ATH_PREFIX1(x,y) x ## y
#define _ATH_PREFIX2(x,y) _ATH_PREFIX1(x,y)
#define _ATH_PREFIX(x) _ATH_PREFIX2(_ATH_EXT_SYM_PREFIX,x)
#define ath_install _ATH_PREFIX(ath_install)
#define ath_init _ATH_PREFIX(ath_init)
#define ath_mutex_init _ATH_PREFIX(ath_mutex_init)
#define ath_mutex_destroy _ATH_PREFIX(ath_mutex_destroy)
#define ath_mutex_lock _ATH_PREFIX(ath_mutex_lock)
#define ath_mutex_unlock _ATH_PREFIX(ath_mutex_unlock)
#define ath_read _ATH_PREFIX(ath_read)
#define ath_write _ATH_PREFIX(ath_write)
#define ath_select _ATH_PREFIX(ath_select)
#define ath_waitpid _ATH_PREFIX(ath_waitpid)
#define ath_connect _ATH_PREFIX(ath_connect)
#define ath_accept _ATH_PREFIX(ath_accept)
#define ath_sendmsg _ATH_PREFIX(ath_sendmsg)
#define ath_recvmsg _ATH_PREFIX(ath_recvmsg)
#endif
enum ath_thread_option
{
ATH_THREAD_OPTION_DEFAULT = 0,
ATH_THREAD_OPTION_USER = 1,
ATH_THREAD_OPTION_PTH = 2,
ATH_THREAD_OPTION_PTHREAD = 3
};
struct ath_ops
{
/* The OPTION field encodes the thread model and the version number
of this structure.
Bits 7 - 0 are used for the thread model
Bits 15 - 8 are used for the version number.
*/
unsigned int option;
int (*init) (void);
int (*mutex_init) (void **priv);
int (*mutex_destroy) (void *priv);
int (*mutex_lock) (void *priv);
int (*mutex_unlock) (void *priv);
ssize_t (*read) (int fd, void *buf, size_t nbytes);
ssize_t (*write) (int fd, const void *buf, size_t nbytes);
#ifdef _WIN32
ssize_t (*select) (int nfd, void *rset, void *wset, void *eset,
struct timeval *timeout);
ssize_t (*waitpid) (pid_t pid, int *status, int options);
int (*accept) (int s, void *addr, int *length_ptr);
int (*connect) (int s, void *addr, int length);
int (*sendmsg) (int s, const void *msg, int flags);
int (*recvmsg) (int s, void *msg, int flags);
#else
ssize_t (*select) (int nfd, fd_set *rset, fd_set *wset, fd_set *eset,
struct timeval *timeout);
ssize_t (*waitpid) (pid_t pid, int *status, int options);
int (*accept) (int s, struct sockaddr *addr, socklen_t *length_ptr);
int (*connect) (int s, struct sockaddr *addr, socklen_t length);
int (*sendmsg) (int s, const struct msghdr *msg, int flags);
int (*recvmsg) (int s, struct msghdr *msg, int flags);
#endif
};
gpg_err_code_t ath_install (struct ath_ops *ath_ops, int check_only);
int ath_init (void);
/* Functions for mutual exclusion. */
typedef void *ath_mutex_t;
#define ATH_MUTEX_INITIALIZER 0
int ath_mutex_init (ath_mutex_t *mutex);
int ath_mutex_destroy (ath_mutex_t *mutex);
int ath_mutex_lock (ath_mutex_t *mutex);
int ath_mutex_unlock (ath_mutex_t *mutex);
/* Replacement for the POSIX functions, which can be used to allow
other (user-level) threads to run. */
ssize_t ath_read (int fd, void *buf, size_t nbytes);
ssize_t ath_write (int fd, const void *buf, size_t nbytes);
#ifdef _WIN32
ssize_t ath_select (int nfd, void *rset, void *wset, void *eset,
struct timeval *timeout);
ssize_t ath_waitpid (pid_t pid, int *status, int options);
int ath_accept (int s, void *addr, int *length_ptr);
int ath_connect (int s, void *addr, int length);
int ath_sendmsg (int s, const void *msg, int flags);
int ath_recvmsg (int s, void *msg, int flags);
#else
ssize_t ath_select (int nfd, fd_set *rset, fd_set *wset, fd_set *eset,
struct timeval *timeout);
ssize_t ath_waitpid (pid_t pid, int *status, int options);
int ath_accept (int s, struct sockaddr *addr, socklen_t *length_ptr);
int ath_connect (int s, struct sockaddr *addr, socklen_t length);
int ath_sendmsg (int s, const struct msghdr *msg, int flags);
int ath_recvmsg (int s, struct msghdr *msg, int flags);
#endif
#endif /* ATH_H */
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