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-rw-r--r--nsprpub/pr/src/md/windows/w32shm.c348
1 files changed, 348 insertions, 0 deletions
diff --git a/nsprpub/pr/src/md/windows/w32shm.c b/nsprpub/pr/src/md/windows/w32shm.c
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index 0000000000..b0d38b9d70
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+++ b/nsprpub/pr/src/md/windows/w32shm.c
@@ -0,0 +1,348 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <private/primpl.h>
+#include <string.h>
+#include <prshm.h>
+#include <prerr.h>
+#include <prmem.h>
+
+#if defined(PR_HAVE_WIN32_NAMED_SHARED_MEMORY)
+
+extern PRLogModuleInfo *_pr_shm_lm;
+
+/*
+ * NSPR-to-NT access right mapping table for file-mapping objects.
+ *
+ * The OR of these three access masks must equal FILE_MAP_ALL_ACCESS.
+ * This is because if a file-mapping object with the specified name
+ * exists, CreateFileMapping requests full access to the existing
+ * object.
+ */
+static DWORD filemapAccessTable[] = {
+ FILE_MAP_ALL_ACCESS & ~FILE_MAP_WRITE, /* read */
+ FILE_MAP_ALL_ACCESS & ~FILE_MAP_READ, /* write */
+ 0 /* execute */
+};
+
+extern PRSharedMemory * _MD_OpenSharedMemory(
+ const char *name,
+ PRSize size,
+ PRIntn flags,
+ PRIntn mode
+)
+{
+ char ipcname[PR_IPC_NAME_SIZE];
+ PRStatus rc = PR_SUCCESS;
+ DWORD dwHi, dwLo;
+ PRSharedMemory *shm;
+ DWORD flProtect = ( PAGE_READWRITE );
+ SECURITY_ATTRIBUTES sa;
+ LPSECURITY_ATTRIBUTES lpSA = NULL;
+ PSECURITY_DESCRIPTOR pSD = NULL;
+ PACL pACL = NULL;
+
+ rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm );
+ if ( PR_FAILURE == rc )
+ {
+ PR_SetError(PR_UNKNOWN_ERROR, 0 );
+ PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: name is invalid"));
+ return(NULL);
+ }
+
+ shm = PR_NEWZAP( PRSharedMemory );
+ if ( NULL == shm )
+ {
+ PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0 );
+ PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New PRSharedMemory out of memory"));
+ return(NULL);
+ }
+
+ shm->ipcname = PR_MALLOC( (PRUint32) (strlen( ipcname ) + 1) );
+ if ( NULL == shm->ipcname )
+ {
+ PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0 );
+ PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New shm->ipcname out of memory"));
+ PR_DELETE(shm);
+ return(NULL);
+ }
+
+ /* copy args to struct */
+ strcpy( shm->ipcname, ipcname );
+ shm->size = size;
+ shm->mode = mode;
+ shm->flags = flags;
+ shm->ident = _PR_SHM_IDENT;
+
+ if (flags & PR_SHM_CREATE ) {
+ dwHi = (DWORD) (((PRUint64) shm->size >> 32) & 0xffffffff);
+ dwLo = (DWORD) (shm->size & 0xffffffff);
+
+ if (_PR_NT_MakeSecurityDescriptorACL(mode, filemapAccessTable,
+ &pSD, &pACL) == PR_SUCCESS) {
+ sa.nLength = sizeof(sa);
+ sa.lpSecurityDescriptor = pSD;
+ sa.bInheritHandle = FALSE;
+ lpSA = &sa;
+ }
+#ifdef WINCE
+ {
+ /*
+ * This is assuming that the name will never be larger than
+ * MAX_PATH. Should we dynamically allocate?
+ */
+ PRUnichar wideIpcName[MAX_PATH];
+ MultiByteToWideChar(CP_ACP, 0, shm->ipcname, -1,
+ wideIpcName, MAX_PATH);
+ shm->handle = CreateFileMappingW(
+ (HANDLE)-1,
+ lpSA,
+ flProtect,
+ dwHi,
+ dwLo,
+ wideIpcName);
+ }
+#else
+ shm->handle = CreateFileMappingA(
+ (HANDLE)-1,
+ lpSA,
+ flProtect,
+ dwHi,
+ dwLo,
+ shm->ipcname);
+#endif
+ if (lpSA != NULL) {
+ _PR_NT_FreeSecurityDescriptorACL(pSD, pACL);
+ }
+
+ if ( NULL == shm->handle ) {
+ PR_LOG(_pr_shm_lm, PR_LOG_DEBUG,
+ ( "PR_OpenSharedMemory: CreateFileMapping() failed: %s",
+ shm->ipcname ));
+ _PR_MD_MAP_DEFAULT_ERROR( GetLastError());
+ PR_FREEIF( shm->ipcname )
+ PR_DELETE( shm );
+ return(NULL);
+ } else {
+ if (( flags & PR_SHM_EXCL) && ( GetLastError() == ERROR_ALREADY_EXISTS )) {
+ PR_LOG(_pr_shm_lm, PR_LOG_DEBUG,
+ ( "PR_OpenSharedMemory: Request exclusive & already exists",
+ shm->ipcname ));
+ PR_SetError( PR_FILE_EXISTS_ERROR, ERROR_ALREADY_EXISTS );
+ CloseHandle( shm->handle );
+ PR_FREEIF( shm->ipcname )
+ PR_DELETE( shm );
+ return(NULL);
+ } else {
+ PR_LOG(_pr_shm_lm, PR_LOG_DEBUG,
+ ( "PR_OpenSharedMemory: CreateFileMapping() success: %s, handle: %d",
+ shm->ipcname, shm->handle ));
+ return(shm);
+ }
+ }
+ } else {
+#ifdef WINCE
+ PR_SetError( PR_NOT_IMPLEMENTED_ERROR, 0 );
+ shm->handle = NULL; /* OpenFileMapping not supported */
+#else
+ shm->handle = OpenFileMapping( FILE_MAP_WRITE, TRUE, shm->ipcname );
+#endif
+ if ( NULL == shm->handle ) {
+ _PR_MD_MAP_DEFAULT_ERROR( GetLastError());
+ PR_LOG(_pr_shm_lm, PR_LOG_DEBUG,
+ ( "PR_OpenSharedMemory: OpenFileMapping() failed: %s, error: %d",
+ shm->ipcname, PR_GetOSError()));
+ PR_FREEIF( shm->ipcname );
+ PR_DELETE( shm );
+ return(NULL);
+ } else {
+ PR_LOG(_pr_shm_lm, PR_LOG_DEBUG,
+ ( "PR_OpenSharedMemory: OpenFileMapping() success: %s, handle: %d",
+ shm->ipcname, shm->handle ));
+ return(shm);
+ }
+ }
+ /* returns from separate paths */
+}
+
+extern void * _MD_AttachSharedMemory( PRSharedMemory *shm, PRIntn flags )
+{
+ PRUint32 access = FILE_MAP_WRITE;
+ void *addr;
+
+ PR_ASSERT( shm->ident == _PR_SHM_IDENT );
+
+ if ( PR_SHM_READONLY & flags ) {
+ access = FILE_MAP_READ;
+ }
+
+ addr = MapViewOfFile( shm->handle,
+ access,
+ 0, 0,
+ shm->size );
+
+ if ( NULL == addr ) {
+ _PR_MD_MAP_DEFAULT_ERROR( GetLastError());
+ PR_LOG( _pr_shm_lm, PR_LOG_ERROR,
+ ("_MD_AttachSharedMemory: MapViewOfFile() failed. OSerror: %d", PR_GetOSError()));
+ }
+
+ return( addr );
+} /* end _MD_ATTACH_SHARED_MEMORY() */
+
+
+extern PRStatus _MD_DetachSharedMemory( PRSharedMemory *shm, void *addr )
+{
+ PRStatus rc = PR_SUCCESS;
+ BOOL wrc;
+
+ PR_ASSERT( shm->ident == _PR_SHM_IDENT );
+
+ wrc = UnmapViewOfFile( addr );
+ if ( FALSE == wrc )
+ {
+ _PR_MD_MAP_DEFAULT_ERROR( GetLastError());
+ PR_LOG( _pr_shm_lm, PR_LOG_ERROR,
+ ("_MD_DetachSharedMemory: UnmapViewOfFile() failed. OSerror: %d", PR_GetOSError()));
+ rc = PR_FAILURE;
+ }
+
+ return( rc );
+}
+
+
+extern PRStatus _MD_CloseSharedMemory( PRSharedMemory *shm )
+{
+ PRStatus rc = PR_SUCCESS;
+ BOOL wrc;
+
+ PR_ASSERT( shm->ident == _PR_SHM_IDENT );
+
+ wrc = CloseHandle( shm->handle );
+ if ( FALSE == wrc )
+ {
+ _PR_MD_MAP_DEFAULT_ERROR( GetLastError());
+ PR_LOG( _pr_shm_lm, PR_LOG_ERROR,
+ ("_MD_CloseSharedMemory: CloseHandle() failed. OSerror: %d", PR_GetOSError()));
+ rc = PR_FAILURE;
+ }
+ PR_FREEIF( shm->ipcname );
+ PR_DELETE( shm );
+
+ return( rc );
+} /* end _MD_CLOSE_SHARED_MEMORY() */
+
+extern PRStatus _MD_DeleteSharedMemory( const char *name )
+{
+ return( PR_SUCCESS );
+}
+
+
+/*
+** Windows implementation of anonymous memory (file) map
+*/
+extern PRLogModuleInfo *_pr_shma_lm;
+
+extern PRFileMap* _md_OpenAnonFileMap(
+ const char *dirName,
+ PRSize size,
+ PRFileMapProtect prot
+)
+{
+ PRFileMap *fm;
+ HANDLE hFileMap;
+
+ fm = PR_CreateFileMap( (PRFileDesc*)-1, size, prot );
+ if ( NULL == fm ) {
+ PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
+ ("_md_OpenAnonFileMap(): PR_CreateFileMap(): failed"));
+ goto Finished;
+ }
+
+ /*
+ ** Make fm->md.hFileMap inheritable. We can't use
+ ** GetHandleInformation and SetHandleInformation
+ ** because these two functions fail with
+ ** ERROR_CALL_NOT_IMPLEMENTED on Win95.
+ */
+ if (DuplicateHandle(GetCurrentProcess(), fm->md.hFileMap,
+ GetCurrentProcess(), &hFileMap,
+ 0, TRUE /* inheritable */,
+ DUPLICATE_SAME_ACCESS) == FALSE) {
+ PR_SetError( PR_UNKNOWN_ERROR, GetLastError() );
+ PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
+ ("_md_OpenAnonFileMap(): DuplicateHandle(): failed"));
+ PR_CloseFileMap( fm );
+ fm = NULL;
+ goto Finished;
+ }
+ CloseHandle(fm->md.hFileMap);
+ fm->md.hFileMap = hFileMap;
+
+Finished:
+ return(fm);
+} /* end md_OpenAnonFileMap() */
+
+/*
+** _md_ExportFileMapAsString()
+**
+*/
+extern PRStatus _md_ExportFileMapAsString(
+ PRFileMap *fm,
+ PRSize bufSize,
+ char *buf
+)
+{
+ PRIntn written;
+
+ written = PR_snprintf( buf, (PRUint32) bufSize, "%d:%" PR_PRIdOSFD ":%ld",
+ (PRIntn)fm->prot, (PROsfd)fm->md.hFileMap, (PRInt32)fm->md.dwAccess );
+
+ PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
+ ("_md_ExportFileMapAsString(): prot: %x, hFileMap: %x, dwAccess: %x",
+ fm->prot, fm->md.hFileMap, fm->md.dwAccess ));
+
+ return((written == -1)? PR_FAILURE : PR_SUCCESS);
+} /* end _md_ExportFileMapAsString() */
+
+
+/*
+** _md_ImportFileMapFromString()
+**
+*/
+extern PRFileMap * _md_ImportFileMapFromString(
+ const char *fmstring
+)
+{
+ PRIntn prot;
+ PROsfd hFileMap;
+ PRInt32 dwAccess;
+ PRFileMap *fm = NULL;
+
+ PR_sscanf( fmstring, "%d:%" PR_SCNdOSFD ":%ld",
+ &prot, &hFileMap, &dwAccess );
+
+ fm = PR_NEWZAP(PRFileMap);
+ if ( NULL == fm ) {
+ PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
+ ("_md_ImportFileMapFromString(): PR_NEWZAP(): Failed"));
+ return(fm);
+ }
+
+ fm->prot = (PRFileMapProtect)prot;
+ fm->md.hFileMap = (HANDLE)hFileMap;
+ fm->md.dwAccess = (DWORD)dwAccess;
+ fm->fd = (PRFileDesc*)-1;
+
+ PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
+ ("_md_ImportFileMapFromString(): fm: %p, prot: %d, hFileMap: %8.8x, dwAccess: %8.8x, fd: %x",
+ fm, prot, fm->md.hFileMap, fm->md.dwAccess, fm->fd));
+ return(fm);
+} /* end _md_ImportFileMapFromString() */
+
+#else
+Error! Why is PR_HAVE_WIN32_NAMED_SHARED_MEMORY not defined?
+#endif /* PR_HAVE_WIN32_NAMED_SHARED_MEMORY */
+/* --- end w32shm.c --- */