michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0: ** uxshm.c -- Unix Implementations NSPR Named Shared Memory
michael@0: **
michael@0: **
michael@0: ** lth. Jul-1999.
michael@0: **
michael@0: */
michael@0: #include <string.h>
michael@0: #include <prshm.h>
michael@0: #include <prerr.h>
michael@0: #include <prmem.h>
michael@0: #include "primpl.h"       
michael@0: #include <fcntl.h>
michael@0: 
michael@0: extern PRLogModuleInfo *_pr_shm_lm;
michael@0: 
michael@0: 
michael@0: #define NSPR_IPC_SHM_KEY 'b'
michael@0: /*
michael@0: ** Implementation for System V
michael@0: */
michael@0: #if defined PR_HAVE_SYSV_NAMED_SHARED_MEMORY
michael@0: #include <sys/ipc.h>
michael@0: #include <sys/shm.h>
michael@0: #include <sys/types.h>
michael@0: #include <sys/stat.h>
michael@0: 
michael@0: #define _MD_OPEN_SHARED_MEMORY _MD_OpenSharedMemory
michael@0: #define _MD_ATTACH_SHARED_MEMORY _MD_AttachSharedMemory
michael@0: #define _MD_DETACH_SHARED_MEMORY _MD_DetachSharedMemory
michael@0: #define _MD_CLOSE_SHARED_MEMORY _MD_CloseSharedMemory
michael@0: #define _MD_DELETE_SHARED_MEMORY  _MD_DeleteSharedMemory
michael@0: 
michael@0: extern PRSharedMemory * _MD_OpenSharedMemory( 
michael@0:     const char *name,
michael@0:     PRSize      size,
michael@0:     PRIntn      flags,
michael@0:     PRIntn      mode
michael@0: )
michael@0: {
michael@0:     PRStatus rc = PR_SUCCESS;
michael@0:     key_t   key;
michael@0:     PRSharedMemory *shm;
michael@0:     char        ipcname[PR_IPC_NAME_SIZE];
michael@0: 
michael@0:     rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm );
michael@0:     if ( PR_FAILURE == rc )
michael@0:     {
michael@0:         _PR_MD_MAP_DEFAULT_ERROR( errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name ));
michael@0:         return( NULL );
michael@0:     }
michael@0: 
michael@0:     shm = PR_NEWZAP( PRSharedMemory );
michael@0:     if ( NULL == shm ) 
michael@0:     {
michael@0:         PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0 );
michael@0:         PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New PRSharedMemory out of memory")); 
michael@0:         return( NULL );
michael@0:     }
michael@0: 
michael@0:     shm->ipcname = (char*)PR_MALLOC( strlen( ipcname ) + 1 );
michael@0:     if ( NULL == shm->ipcname )
michael@0:     {
michael@0:         PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0 );
michael@0:         PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New shm->ipcname out of memory")); 
michael@0:         PR_DELETE( shm );
michael@0:         return( NULL );
michael@0:     }
michael@0: 
michael@0:     /* copy args to struct */
michael@0:     strcpy( shm->ipcname, ipcname );
michael@0:     shm->size = size; 
michael@0:     shm->mode = mode; 
michael@0:     shm->flags = flags;
michael@0:     shm->ident = _PR_SHM_IDENT;
michael@0: 
michael@0:     /* create the file first */
michael@0:     if ( flags & PR_SHM_CREATE )  {
michael@0:         int osfd = open( shm->ipcname, (O_RDWR | O_CREAT), shm->mode );
michael@0:         if ( -1 == osfd ) {
michael@0:             _PR_MD_MAP_OPEN_ERROR( errno );
michael@0:             PR_FREEIF( shm->ipcname );
michael@0:             PR_DELETE( shm );
michael@0:             return( NULL );
michael@0:         } 
michael@0:         if ( close(osfd) == -1 ) {
michael@0:             _PR_MD_MAP_CLOSE_ERROR( errno );
michael@0:             PR_FREEIF( shm->ipcname );
michael@0:             PR_DELETE( shm );
michael@0:             return( NULL );
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /* hash the shm.name to an ID */
michael@0:     key = ftok( shm->ipcname, NSPR_IPC_SHM_KEY );
michael@0:     if ( -1 == key )
michael@0:     {
michael@0:         rc = PR_FAILURE;
michael@0:         _PR_MD_MAP_DEFAULT_ERROR( errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_OpenSharedMemory(): ftok() failed on name: %s", shm->ipcname));
michael@0:         PR_FREEIF( shm->ipcname );
michael@0:         PR_DELETE( shm );
michael@0:         return( NULL );
michael@0:     }
michael@0: 
michael@0:     /* get the shared memory */
michael@0:     if ( flags & PR_SHM_CREATE )  {
michael@0:         shm->id = shmget( key, shm->size, ( shm->mode | IPC_CREAT|IPC_EXCL));
michael@0:         if ( shm->id >= 0 ) {
michael@0:             return( shm );
michael@0:         }
michael@0:         if ((errno == EEXIST) && (flags & PR_SHM_EXCL)) {
michael@0:             PR_SetError( PR_FILE_EXISTS_ERROR, errno );
michael@0:             PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:                 ("_MD_OpenSharedMemory(): shmget() exclusive failed, errno: %d", errno));
michael@0:             PR_FREEIF(shm->ipcname);
michael@0:             PR_DELETE(shm);
michael@0:             return(NULL);
michael@0:         }
michael@0:     } 
michael@0: 
michael@0:     shm->id = shmget( key, shm->size, shm->mode );
michael@0:     if ( -1 == shm->id ) {
michael@0:         _PR_MD_MAP_DEFAULT_ERROR( errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_OpenSharedMemory(): shmget() failed, errno: %d", errno));
michael@0:         PR_FREEIF(shm->ipcname);
michael@0:         PR_DELETE(shm);
michael@0:         return(NULL);
michael@0:     }
michael@0: 
michael@0:     return( shm );
michael@0: } /* end _MD_OpenSharedMemory() */
michael@0: 
michael@0: extern void * _MD_AttachSharedMemory( PRSharedMemory *shm, PRIntn flags )
michael@0: {
michael@0:     void        *addr;
michael@0:     PRUint32    aFlags = shm->mode;
michael@0: 
michael@0:     PR_ASSERT( shm->ident == _PR_SHM_IDENT );
michael@0: 
michael@0:     aFlags |= (flags & PR_SHM_READONLY )? SHM_RDONLY : 0;
michael@0: 
michael@0:     addr = shmat( shm->id, NULL, aFlags );
michael@0:     if ( (void*)-1 == addr )
michael@0:     {
michael@0:         _PR_MD_MAP_DEFAULT_ERROR( errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_AttachSharedMemory(): shmat() failed on name: %s, OsError: %d", 
michael@0:                 shm->ipcname, PR_GetOSError() ));
michael@0:         addr = NULL;
michael@0:     }
michael@0: 
michael@0:     return addr;
michael@0: }    
michael@0: 
michael@0: extern PRStatus _MD_DetachSharedMemory( PRSharedMemory *shm, void *addr )
michael@0: {
michael@0:     PRStatus rc = PR_SUCCESS;
michael@0:     PRIntn   urc;
michael@0: 
michael@0:     PR_ASSERT( shm->ident == _PR_SHM_IDENT );
michael@0: 
michael@0:     urc = shmdt( addr );
michael@0:     if ( -1 == urc )
michael@0:     {
michael@0:         rc = PR_FAILURE;
michael@0:         _PR_MD_MAP_DEFAULT_ERROR( errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_DetachSharedMemory(): shmdt() failed on name: %s", shm->ipcname ));
michael@0:     }
michael@0: 
michael@0:     return rc;
michael@0: }    
michael@0: 
michael@0: extern PRStatus _MD_CloseSharedMemory( PRSharedMemory *shm )
michael@0: {
michael@0:     PR_ASSERT( shm->ident == _PR_SHM_IDENT );
michael@0: 
michael@0:     PR_FREEIF(shm->ipcname);
michael@0:     PR_DELETE(shm);
michael@0: 
michael@0:     return PR_SUCCESS;
michael@0: }    
michael@0: 
michael@0: extern PRStatus _MD_DeleteSharedMemory( const char *name )
michael@0: {
michael@0:     PRStatus rc = PR_SUCCESS;
michael@0:     key_t   key;
michael@0:     int     id;
michael@0:     PRIntn  urc;
michael@0:     char        ipcname[PR_IPC_NAME_SIZE];
michael@0: 
michael@0:     rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm );
michael@0:     if ( PR_FAILURE == rc )
michael@0:     {
michael@0:         PR_SetError( PR_UNKNOWN_ERROR , errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_DeleteSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name ));
michael@0:         return(PR_FAILURE);
michael@0:     }
michael@0: 
michael@0:     /* create the file first */ 
michael@0:     {
michael@0:         int osfd = open( ipcname, (O_RDWR | O_CREAT), 0666 );
michael@0:         if ( -1 == osfd ) {
michael@0:             _PR_MD_MAP_OPEN_ERROR( errno );
michael@0:             return( PR_FAILURE );
michael@0:         } 
michael@0:         if ( close(osfd) == -1 ) {
michael@0:             _PR_MD_MAP_CLOSE_ERROR( errno );
michael@0:             return( PR_FAILURE );
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /* hash the shm.name to an ID */
michael@0:     key = ftok( ipcname, NSPR_IPC_SHM_KEY );
michael@0:     if ( -1 == key )
michael@0:     {
michael@0:         rc = PR_FAILURE;
michael@0:         _PR_MD_MAP_DEFAULT_ERROR( errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_DeleteSharedMemory(): ftok() failed on name: %s", ipcname));
michael@0:     }
michael@0: 
michael@0: #ifdef SYMBIAN
michael@0:     /* In Symbian OS the system imposed minimum is 1 byte, instead of ZERO */
michael@0:     id = shmget( key, 1, 0 );
michael@0: #else
michael@0:     id = shmget( key, 0, 0 );
michael@0: #endif
michael@0:     if ( -1 == id ) {
michael@0:         _PR_MD_MAP_DEFAULT_ERROR( errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_DeleteSharedMemory(): shmget() failed, errno: %d", errno));
michael@0:         return(PR_FAILURE);
michael@0:     }
michael@0: 
michael@0:     urc = shmctl( id, IPC_RMID, NULL );
michael@0:     if ( -1 == urc )
michael@0:     {
michael@0:         _PR_MD_MAP_DEFAULT_ERROR( errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_DeleteSharedMemory(): shmctl() failed on name: %s", ipcname ));
michael@0:         return(PR_FAILURE);
michael@0:     }
michael@0: 
michael@0:     urc = unlink( ipcname );
michael@0:     if ( -1 == urc ) {
michael@0:         _PR_MD_MAP_UNLINK_ERROR( errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_DeleteSharedMemory(): unlink() failed: %s", ipcname ));
michael@0:         return(PR_FAILURE);
michael@0:     }
michael@0: 
michael@0:     return rc;
michael@0: }  /* end _MD_DeleteSharedMemory() */
michael@0: 
michael@0: /*
michael@0: ** Implementation for Posix
michael@0: */
michael@0: #elif defined PR_HAVE_POSIX_NAMED_SHARED_MEMORY
michael@0: #include <sys/mman.h>
michael@0: 
michael@0: #define _MD_OPEN_SHARED_MEMORY _MD_OpenSharedMemory
michael@0: #define _MD_ATTACH_SHARED_MEMORY _MD_AttachSharedMemory
michael@0: #define _MD_DETACH_SHARED_MEMORY _MD_DetachSharedMemory
michael@0: #define _MD_CLOSE_SHARED_MEMORY _MD_CloseSharedMemory
michael@0: #define _MD_DELETE_SHARED_MEMORY  _MD_DeleteSharedMemory
michael@0: 
michael@0: struct _MDSharedMemory {
michael@0:     int     handle;
michael@0: };
michael@0: 
michael@0: extern PRSharedMemory * _MD_OpenSharedMemory( 
michael@0:     const char *name,
michael@0:     PRSize      size,
michael@0:     PRIntn      flags,
michael@0:     PRIntn      mode
michael@0: )
michael@0: {
michael@0:     PRStatus    rc = PR_SUCCESS;
michael@0:     PRInt32     end;
michael@0:     PRSharedMemory *shm;
michael@0:     char        ipcname[PR_IPC_NAME_SIZE];
michael@0: 
michael@0:     rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm );
michael@0:     if ( PR_FAILURE == rc )
michael@0:     {
michael@0:         PR_SetError( PR_UNKNOWN_ERROR , errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name ));
michael@0:         return( NULL );
michael@0:     }
michael@0: 
michael@0:     shm = PR_NEWZAP( PRSharedMemory );
michael@0:     if ( NULL == shm ) 
michael@0:     {
michael@0:         PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0 );
michael@0:         PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New PRSharedMemory out of memory")); 
michael@0:         return( NULL );
michael@0:     }
michael@0: 
michael@0:     shm->ipcname = PR_MALLOC( strlen( ipcname ) + 1 );
michael@0:     if ( NULL == shm->ipcname )
michael@0:     {
michael@0:         PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0 );
michael@0:         PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, ( "PR_OpenSharedMemory: New shm->ipcname out of memory")); 
michael@0:         return( NULL );
michael@0:     }
michael@0: 
michael@0:     /* copy args to struct */
michael@0:     strcpy( shm->ipcname, ipcname );
michael@0:     shm->size = size; 
michael@0:     shm->mode = mode;
michael@0:     shm->flags = flags;
michael@0:     shm->ident = _PR_SHM_IDENT;
michael@0: 
michael@0:     /*
michael@0:     ** Create the shared memory
michael@0:     */
michael@0:     if ( flags & PR_SHM_CREATE )  {
michael@0:         int oflag = (O_CREAT | O_RDWR);
michael@0:         
michael@0:         if ( flags & PR_SHM_EXCL )
michael@0:             oflag |= O_EXCL;
michael@0:         shm->id = shm_open( shm->ipcname, oflag, shm->mode );
michael@0:     } else {
michael@0:         shm->id = shm_open( shm->ipcname, O_RDWR, shm->mode );
michael@0:     }
michael@0: 
michael@0:     if ( -1 == shm->id )  {
michael@0:         _PR_MD_MAP_DEFAULT_ERROR( errno );
michael@0:         PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_OpenSharedMemory(): shm_open failed: %s, OSError: %d",
michael@0:                 shm->ipcname, PR_GetOSError())); 
michael@0:         PR_DELETE( shm->ipcname );
michael@0:         PR_DELETE( shm );
michael@0:         return(NULL);
michael@0:     }
michael@0: 
michael@0:     end = ftruncate( shm->id, shm->size );
michael@0:     if ( -1 == end ) {
michael@0:         _PR_MD_MAP_DEFAULT_ERROR( errno );
michael@0:         PR_LOG(_pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_OpenSharedMemory(): ftruncate failed, OSError: %d",
michael@0:                 PR_GetOSError()));
michael@0:         PR_DELETE( shm->ipcname );
michael@0:         PR_DELETE( shm );
michael@0:         return(NULL);
michael@0:     }
michael@0: 
michael@0:     return(shm);
michael@0: } /* end _MD_OpenSharedMemory() */
michael@0: 
michael@0: extern void * _MD_AttachSharedMemory( PRSharedMemory *shm, PRIntn flags )
michael@0: {
michael@0:     void        *addr;
michael@0:     PRIntn      prot = (PROT_READ | PROT_WRITE);
michael@0: 
michael@0:     PR_ASSERT( shm->ident == _PR_SHM_IDENT );
michael@0: 
michael@0:     if ( PR_SHM_READONLY == flags)
michael@0:         prot ^= PROT_WRITE;
michael@0: 
michael@0:     addr = mmap( (void*)0, shm->size, prot, MAP_SHARED, shm->id, 0 );
michael@0:     if ((void*)-1 == addr )
michael@0:     {
michael@0:         _PR_MD_MAP_DEFAULT_ERROR( errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_AttachSharedMemory(): mmap failed: %s, errno: %d",
michael@0:                 shm->ipcname, PR_GetOSError()));
michael@0:         addr = NULL;
michael@0:     } else {
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_AttachSharedMemory(): name: %s, attached at: %p", shm->ipcname, addr));
michael@0:     }
michael@0:     
michael@0:     return addr;
michael@0: }    
michael@0: 
michael@0: extern PRStatus _MD_DetachSharedMemory( PRSharedMemory *shm, void *addr )
michael@0: {
michael@0:     PRStatus    rc = PR_SUCCESS;
michael@0:     PRIntn      urc;
michael@0: 
michael@0:     PR_ASSERT( shm->ident == _PR_SHM_IDENT );
michael@0: 
michael@0:     urc = munmap( addr, shm->size );
michael@0:     if ( -1 == urc )
michael@0:     {
michael@0:         rc = PR_FAILURE;
michael@0:         _PR_MD_MAP_DEFAULT_ERROR( errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_DetachSharedMemory(): munmap failed: %s, errno: %d", 
michael@0:                 shm->ipcname, PR_GetOSError()));
michael@0:     }
michael@0:     return rc;
michael@0: }    
michael@0: 
michael@0: extern PRStatus _MD_CloseSharedMemory( PRSharedMemory *shm )
michael@0: {
michael@0:     int urc;
michael@0:     
michael@0:     PR_ASSERT( shm->ident == _PR_SHM_IDENT );
michael@0: 
michael@0:     urc = close( shm->id );
michael@0:     if ( -1 == urc ) {
michael@0:         _PR_MD_MAP_CLOSE_ERROR( errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_CloseSharedMemory(): close() failed, error: %d", PR_GetOSError()));
michael@0:         return(PR_FAILURE);
michael@0:     }
michael@0:     PR_DELETE( shm->ipcname );
michael@0:     PR_DELETE( shm );
michael@0:     return PR_SUCCESS;
michael@0: }    
michael@0: 
michael@0: extern PRStatus _MD_DeleteSharedMemory( const char *name )
michael@0: {
michael@0:     PRStatus    rc = PR_SUCCESS;
michael@0:     PRUintn     urc;
michael@0:     char        ipcname[PR_IPC_NAME_SIZE];
michael@0: 
michael@0:     rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm );
michael@0:     if ( PR_FAILURE == rc )
michael@0:     {
michael@0:         PR_SetError( PR_UNKNOWN_ERROR , errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name ));
michael@0:         return rc;
michael@0:     }
michael@0: 
michael@0:     urc = shm_unlink( ipcname );
michael@0:     if ( -1 == urc ) {
michael@0:         rc = PR_FAILURE;
michael@0:         _PR_MD_MAP_DEFAULT_ERROR( errno );
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_DeleteSharedMemory(): shm_unlink failed: %s, errno: %d", 
michael@0:                 ipcname, PR_GetOSError()));
michael@0:     } else {
michael@0:         PR_LOG( _pr_shm_lm, PR_LOG_DEBUG, 
michael@0:             ("_MD_DeleteSharedMemory(): %s, success", ipcname));
michael@0:     }
michael@0: 
michael@0:     return rc;
michael@0: } /* end _MD_DeleteSharedMemory() */
michael@0: #endif
michael@0: 
michael@0: 
michael@0: 
michael@0: /*
michael@0: ** Unix implementation for anonymous memory (file) mapping
michael@0: */
michael@0: extern PRLogModuleInfo *_pr_shma_lm;
michael@0: 
michael@0: #include <unistd.h>
michael@0: 
michael@0: extern PRFileMap* _md_OpenAnonFileMap( 
michael@0:     const char *dirName,
michael@0:     PRSize      size,
michael@0:     PRFileMapProtect prot
michael@0: )
michael@0: {
michael@0:     PRFileMap   *fm = NULL;
michael@0:     PRFileDesc  *fd;
michael@0:     int         osfd;
michael@0:     PRIntn      urc;
michael@0:     PRIntn      mode = 0600;
michael@0:     char        *genName;
michael@0:     pid_t       pid = getpid(); /* for generating filename */
michael@0:     PRThread    *tid = PR_GetCurrentThread(); /* for generating filename */
michael@0:     int         incr; /* for generating filename */
michael@0:     const int   maxTries = 20; /* maximum # attempts at a unique filename */
michael@0:     PRInt64     size64; /* 64-bit version of 'size' */
michael@0: 
michael@0:     /*
michael@0:     ** generate a filename from input and runtime environment
michael@0:     ** open the file, unlink the file.
michael@0:     ** make maxTries number of attempts at uniqueness in the filename
michael@0:     */
michael@0:     for ( incr = 0; incr < maxTries ; incr++ ) {
michael@0: #if defined(SYMBIAN)
michael@0: #define NSPR_AFM_FILENAME "%s\\NSPR-AFM-%d-%p.%d"
michael@0: #else
michael@0: #define NSPR_AFM_FILENAME "%s/.NSPR-AFM-%d-%p.%d"
michael@0: #endif
michael@0:         genName = PR_smprintf( NSPR_AFM_FILENAME,
michael@0:             dirName, (int) pid, tid, incr );
michael@0:         if ( NULL == genName ) {
michael@0:             PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
michael@0:                 ("_md_OpenAnonFileMap(): PR_snprintf(): failed, generating filename"));
michael@0:             goto Finished;
michael@0:         }
michael@0:         
michael@0:         /* create the file */
michael@0:         osfd = open( genName, (O_CREAT | O_EXCL | O_RDWR), mode );
michael@0:         if ( -1 == osfd ) {
michael@0:             if ( EEXIST == errno )  {
michael@0:                 PR_smprintf_free( genName );
michael@0:                 continue; /* name exists, try again */
michael@0:             } else {
michael@0:                 _PR_MD_MAP_OPEN_ERROR( errno );
michael@0:                 PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
michael@0:                     ("_md_OpenAnonFileMap(): open(): failed, filename: %s, errno: %d", 
michael@0:                         genName, PR_GetOSError()));
michael@0:                 PR_smprintf_free( genName );
michael@0:                 goto Finished;
michael@0:             }
michael@0:         }
michael@0:         break; /* name generation and open successful, break; */
michael@0:     } /* end for() */
michael@0: 
michael@0:     if ( incr == maxTries ) {
michael@0:         PR_ASSERT( -1 == osfd );
michael@0:         PR_ASSERT( EEXIST == errno );
michael@0:         _PR_MD_MAP_OPEN_ERROR( errno );
michael@0:         goto Finished;
michael@0:     }
michael@0: 
michael@0:     urc = unlink( genName );
michael@0: #if defined(SYMBIAN) && defined(__WINS__)
michael@0:     /* If it is being used by the system or another process, Symbian OS 
michael@0:      * Emulator(WINS) considers this an error. */
michael@0:     if ( -1 == urc && EACCES != errno ) {
michael@0: #else
michael@0:     if ( -1 == urc ) {
michael@0: #endif
michael@0:         _PR_MD_MAP_UNLINK_ERROR( errno );
michael@0:         PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
michael@0:             ("_md_OpenAnonFileMap(): failed on unlink(), errno: %d", errno));
michael@0:         PR_smprintf_free( genName );
michael@0:         close( osfd );
michael@0:         goto Finished;        
michael@0:     }
michael@0:     PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
michael@0:         ("_md_OpenAnonFileMap(): unlink(): %s", genName ));
michael@0: 
michael@0:     PR_smprintf_free( genName );
michael@0: 
michael@0:     fd = PR_ImportFile( osfd );
michael@0:     if ( NULL == fd ) {
michael@0:         PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
michael@0:             ("_md_OpenAnonFileMap(): PR_ImportFile(): failed"));
michael@0:         goto Finished;        
michael@0:     }
michael@0:     PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
michael@0:         ("_md_OpenAnonFileMap(): fd: %p", fd ));
michael@0: 
michael@0:     urc = ftruncate( fd->secret->md.osfd, size );
michael@0:     if ( -1 == urc ) {
michael@0:         _PR_MD_MAP_DEFAULT_ERROR( errno );
michael@0:         PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
michael@0:             ("_md_OpenAnonFileMap(): failed on ftruncate(), errno: %d", errno));
michael@0:         PR_Close( fd );
michael@0:         goto Finished;        
michael@0:     }
michael@0:     PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
michael@0:         ("_md_OpenAnonFileMap(): ftruncate(): size: %d", size ));
michael@0: 
michael@0:     LL_UI2L(size64, size);  /* PRSize (size_t) is unsigned */
michael@0:     fm = PR_CreateFileMap( fd, size64, prot );
michael@0:     if ( NULL == fm )  {
michael@0:         PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
michael@0:             ("PR_OpenAnonFileMap(): failed"));
michael@0:         PR_Close( fd );
michael@0:         goto Finished;        
michael@0:     }
michael@0:     fm->md.isAnonFM = PR_TRUE; /* set fd close */
michael@0: 
michael@0:     PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
michael@0:         ("_md_OpenAnonFileMap(): PR_CreateFileMap(): fm: %p", fm ));
michael@0: 
michael@0: Finished:    
michael@0:     return(fm);
michael@0: } /* end md_OpenAnonFileMap() */
michael@0: 
michael@0: /*
michael@0: ** _md_ExportFileMapAsString()
michael@0: **
michael@0: **
michael@0: */
michael@0: extern PRStatus _md_ExportFileMapAsString(
michael@0:     PRFileMap *fm,
michael@0:     PRSize    bufSize,
michael@0:     char      *buf
michael@0: )
michael@0: {
michael@0:     PRIntn  written;
michael@0:     PRIntn  prot = (PRIntn)fm->prot;
michael@0:     
michael@0:     written = PR_snprintf( buf, bufSize, "%ld:%d",
michael@0:         fm->fd->secret->md.osfd, prot );
michael@0:         
michael@0:     return((written == -1)? PR_FAILURE : PR_SUCCESS);
michael@0: } /* end _md_ExportFileMapAsString() */
michael@0: 
michael@0: 
michael@0: extern PRFileMap * _md_ImportFileMapFromString(
michael@0:     const char *fmstring
michael@0: )
michael@0: {
michael@0:     PRStatus    rc;
michael@0:     PRInt32     osfd;
michael@0:     PRIntn      prot; /* really: a PRFileMapProtect */
michael@0:     PRFileDesc  *fd;
michael@0:     PRFileMap   *fm = NULL; /* default return value */
michael@0:     PRFileInfo64 info;
michael@0: 
michael@0:     PR_sscanf( fmstring, "%ld:%d", &osfd, &prot );
michael@0: 
michael@0:     /* import the os file descriptor */
michael@0:     fd = PR_ImportFile( osfd );
michael@0:     if ( NULL == fd ) {
michael@0:         PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
michael@0:             ("_md_ImportFileMapFromString(): PR_ImportFile() failed"));
michael@0:         goto Finished;
michael@0:     }
michael@0: 
michael@0:     rc = PR_GetOpenFileInfo64( fd, &info );
michael@0:     if ( PR_FAILURE == rc )  {
michael@0:         PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
michael@0:             ("_md_ImportFileMapFromString(): PR_GetOpenFileInfo64() failed"));    
michael@0:         goto Finished;
michael@0:     }
michael@0: 
michael@0:     fm = PR_CreateFileMap( fd, info.size, (PRFileMapProtect)prot );
michael@0:     if ( NULL == fm ) {
michael@0:         PR_LOG( _pr_shma_lm, PR_LOG_DEBUG,
michael@0:             ("_md_ImportFileMapFromString(): PR_CreateFileMap() failed"));    
michael@0:     }
michael@0: 
michael@0: Finished:
michael@0:     return(fm);
michael@0: } /* end _md_ImportFileMapFromString() */