extern PRStatus _MD_DeleteSharedMemory( const char *name )
{
PRStatus rc = PR_SUCCESS;
PRUintn urc;
char ipcname[PR_IPC_NAME_SIZE];
rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm );
if ( PR_FAILURE == rc )
{
PR_SetError( PR_UNKNOWN_ERROR , errno );
PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,
("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name ));
return rc;
}
urc = shm_unlink( ipcname );
if ( -1 == urc ) {
rc = PR_FAILURE;
_PR_MD_MAP_DEFAULT_ERROR( errno );
PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,
("_MD_DeleteSharedMemory(): shm_unlink failed: %s, errno: %d",
ipcname, PR_GetOSError()));
} else {
PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,
("_MD_DeleteSharedMemory(): %s, success", ipcname));
}
return rc;
} /* end _MD_DeleteSharedMemory() */
PR_IMPLEMENT(PRStatus) PR_DeleteSemaphore(const char *name)
{
char osname[PR_IPC_NAME_SIZE];
if (!_pr_initialized) _PR_ImplicitInitialization();
if (_PR_MakeNativeIPCName(name, osname, sizeof(osname), _PRIPCSem)
== PR_FAILURE) {
return PR_FAILURE;
}
return _PR_MD_DELETE_SEMAPHORE(osname);
}
PR_IMPLEMENT(PRSem *) PR_OpenSemaphore(
const char *name, PRIntn flags, PRIntn mode, PRUintn value)
{
char osname[PR_IPC_NAME_SIZE];
if (!_pr_initialized) _PR_ImplicitInitialization();
if (_PR_MakeNativeIPCName(name, osname, sizeof(osname), _PRIPCSem)
== PR_FAILURE) {
return NULL;
}
return _PR_MD_OPEN_SEMAPHORE(osname, flags, mode, value);
}
PR_IMPLEMENT(PRSem *) PR_OpenSemaphore(
const char *name,
PRIntn flags,
PRIntn mode,
PRUintn value)
{
PRSem *sem;
char osname[PR_IPC_NAME_SIZE];
if (_PR_MakeNativeIPCName(name, osname, sizeof(osname), _PRIPCSem)
== PR_FAILURE)
{
return NULL;
}
sem = PR_NEW(PRSem);
if (NULL == sem)
{
PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
return NULL;
}
if (flags & PR_SEM_CREATE)
{
int oflag = O_CREAT;
if (flags & PR_SEM_EXCL) oflag |= O_EXCL;
sem->sem = sem_open(osname, oflag, mode, value);
}
else
{
#ifdef HPUX
/* Pass 0 as the mode and value arguments to work around a bug. */
sem->sem = sem_open(osname, 0, 0, 0);
#else
sem->sem = sem_open(osname, 0);
#endif
}
if ((sem_t *) -1 == sem->sem)
{
_PR_MD_MAP_DEFAULT_ERROR(errno);
PR_Free(sem);
return NULL;
}
return sem;
}
PR_IMPLEMENT(PRStatus) PR_DeleteSemaphore(const char *name)
{
int rv;
char osname[PR_IPC_NAME_SIZE];
if (_PR_MakeNativeIPCName(name, osname, sizeof(osname), _PRIPCSem)
== PR_FAILURE)
{
return PR_FAILURE;
}
rv = sem_unlink(osname);
if (0 != rv)
{
_PR_MD_MAP_DEFAULT_ERROR(errno);
return PR_FAILURE;
}
return PR_SUCCESS;
}
PR_IMPLEMENT(PRStatus) PR_DeleteSemaphore(const char *name)
{
key_t key;
int semid;
/* On some systems (e.g., glibc 2.0) semctl requires a fourth argument */
union semun unused;
char osname[PR_IPC_NAME_SIZE];
if (_PR_MakeNativeIPCName(name, osname, sizeof(osname), _PRIPCSem)
== PR_FAILURE)
{
return PR_FAILURE;
}
key = ftok(osname, NSPR_IPC_KEY_ID);
if ((key_t) -1 == key)
{
_PR_MD_MAP_DEFAULT_ERROR(errno);
return PR_FAILURE;
}
if (unlink(osname) == -1)
{
_PR_MD_MAP_UNLINK_ERROR(errno);
return PR_FAILURE;
}
semid = semget(key, 1, NSPR_SEM_MODE);
if (-1 == semid)
{
_PR_MD_MAP_DEFAULT_ERROR(errno);
return PR_FAILURE;
}
unused.val = 0;
if (semctl(semid, 0, IPC_RMID, unused) == -1)
{
_PR_MD_MAP_DEFAULT_ERROR(errno);
return PR_FAILURE;
}
return PR_SUCCESS;
}
PR_IMPLEMENT(PRSem *) PR_OpenSemaphore(
const char *name,
PRIntn flags,
PRIntn mode,
PRUintn value)
{
PRSem *sem;
key_t key;
union semun arg;
struct sembuf sop;
struct semid_ds seminfo;
#define MAX_TRIES 60
PRIntn i;
char osname[PR_IPC_NAME_SIZE];
if (_PR_MakeNativeIPCName(name, osname, sizeof(osname), _PRIPCSem)
== PR_FAILURE)
{
return NULL;
}
/* Make sure the file exists before calling ftok. */
if (flags & PR_SEM_CREATE)
{
int osfd = open(osname, O_RDWR|O_CREAT, mode);
if (-1 == osfd)
{
_PR_MD_MAP_OPEN_ERROR(errno);
return NULL;
}
if (close(osfd) == -1)
{
_PR_MD_MAP_CLOSE_ERROR(errno);
return NULL;
}
}
key = ftok(osname, NSPR_IPC_KEY_ID);
if ((key_t)-1 == key)
{
_PR_MD_MAP_DEFAULT_ERROR(errno);
return NULL;
}
sem = PR_NEW(PRSem);
if (NULL == sem)
{
PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
return NULL;
}
if (flags & PR_SEM_CREATE)
{
sem->semid = semget(key, 1, mode|IPC_CREAT|IPC_EXCL);
if (sem->semid >= 0)
{
/* creator of a semaphore is responsible for initializing it */
arg.val = 0;
if (semctl(sem->semid, 0, SETVAL, arg) == -1)
{
_PR_MD_MAP_DEFAULT_ERROR(errno);
PR_Free(sem);
return NULL;
}
/* call semop to set sem_otime to nonzero */
sop.sem_num = 0;
sop.sem_op = value;
sop.sem_flg = 0;
if (semop(sem->semid, &sop, 1) == -1)
{
_PR_MD_MAP_DEFAULT_ERROR(errno);
PR_Free(sem);
return NULL;
}
return sem;
}
if (errno != EEXIST || flags & PR_SEM_EXCL)
{
_PR_MD_MAP_DEFAULT_ERROR(errno);
PR_Free(sem);
return NULL;
}
}
sem->semid = semget(key, 1, NSPR_SEM_MODE);
if (sem->semid == -1)
{
_PR_MD_MAP_DEFAULT_ERROR(errno);
PR_Free(sem);
return NULL;
}
for (i = 0; i < MAX_TRIES; i++)
{
arg.buf = &seminfo;
semctl(sem->semid, 0, IPC_STAT, arg);
if (seminfo.sem_otime != 0) break;
sleep(1);
}
if (i == MAX_TRIES)
{
PR_SetError(PR_IO_TIMEOUT_ERROR, 0);
PR_Free(sem);
return NULL;
}
return sem;
}
extern PRSharedMemory * _MD_OpenSharedMemory(
const char *name,
PRSize size,
PRIntn flags,
PRIntn mode
)
{
PRStatus rc = PR_SUCCESS;
key_t key;
PRSharedMemory *shm;
char ipcname[PR_IPC_NAME_SIZE];
rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm );
if ( PR_FAILURE == rc )
{
_PR_MD_MAP_DEFAULT_ERROR( errno );
PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,
("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name ));
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 = (char*)PR_MALLOC( 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;
/* create the file first */
if ( flags & PR_SHM_CREATE ) {
int osfd = open( shm->ipcname, (O_RDWR | O_CREAT), shm->mode );
if ( -1 == osfd ) {
_PR_MD_MAP_OPEN_ERROR( errno );
PR_FREEIF( shm->ipcname );
PR_DELETE( shm );
return( NULL );
}
if ( close(osfd) == -1 ) {
_PR_MD_MAP_CLOSE_ERROR( errno );
PR_FREEIF( shm->ipcname );
PR_DELETE( shm );
return( NULL );
}
}
/* hash the shm.name to an ID */
key = ftok( shm->ipcname, NSPR_IPC_SHM_KEY );
if ( -1 == key )
{
rc = PR_FAILURE;
_PR_MD_MAP_DEFAULT_ERROR( errno );
PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,
("_MD_OpenSharedMemory(): ftok() failed on name: %s", shm->ipcname));
PR_FREEIF( shm->ipcname );
PR_DELETE( shm );
return( NULL );
}
/* get the shared memory */
if ( flags & PR_SHM_CREATE ) {
shm->id = shmget( key, shm->size, ( shm->mode | IPC_CREAT|IPC_EXCL));
if ( shm->id >= 0 ) {
return( shm );
}
if ((errno == EEXIST) && (flags & PR_SHM_EXCL)) {
PR_SetError( PR_FILE_EXISTS_ERROR, errno );
PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,
("_MD_OpenSharedMemory(): shmget() exclusive failed, errno: %d", errno));
PR_FREEIF(shm->ipcname);
PR_DELETE(shm);
return(NULL);
}
}
shm->id = shmget( key, shm->size, shm->mode );
if ( -1 == shm->id ) {
_PR_MD_MAP_DEFAULT_ERROR( errno );
PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,
("_MD_OpenSharedMemory(): shmget() failed, errno: %d", errno));
PR_FREEIF(shm->ipcname);
PR_DELETE(shm);
return(NULL);
}
return( shm );
} /* end _MD_OpenSharedMemory() */
extern PRSharedMemory * _MD_OpenSharedMemory(
const char *name,
PRSize size,
PRIntn flags,
PRIntn mode
)
{
PRStatus rc = PR_SUCCESS;
PRInt32 end;
PRSharedMemory *shm;
char ipcname[PR_IPC_NAME_SIZE];
rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm );
if ( PR_FAILURE == rc )
{
PR_SetError( PR_UNKNOWN_ERROR , errno );
PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,
("_MD_OpenSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name ));
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( 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"));
return( NULL );
}
/* copy args to struct */
strcpy( shm->ipcname, ipcname );
shm->size = size;
shm->mode = mode;
shm->flags = flags;
shm->ident = _PR_SHM_IDENT;
/*
** Create the shared memory
*/
if ( flags & PR_SHM_CREATE ) {
int oflag = (O_CREAT | O_RDWR);
if ( flags & PR_SHM_EXCL )
oflag |= O_EXCL;
shm->id = shm_open( shm->ipcname, oflag, shm->mode );
} else {
shm->id = shm_open( shm->ipcname, O_RDWR, shm->mode );
}
if ( -1 == shm->id ) {
_PR_MD_MAP_DEFAULT_ERROR( errno );
PR_LOG(_pr_shm_lm, PR_LOG_DEBUG,
("_MD_OpenSharedMemory(): shm_open failed: %s, OSError: %d",
shm->ipcname, PR_GetOSError()));
PR_DELETE( shm->ipcname );
PR_DELETE( shm );
return(NULL);
}
end = ftruncate( shm->id, shm->size );
if ( -1 == end ) {
_PR_MD_MAP_DEFAULT_ERROR( errno );
PR_LOG(_pr_shm_lm, PR_LOG_DEBUG,
("_MD_OpenSharedMemory(): ftruncate failed, OSError: %d",
PR_GetOSError()));
PR_DELETE( shm->ipcname );
PR_DELETE( shm );
return(NULL);
}
return(shm);
} /* end _MD_OpenSharedMemory() */
extern PRStatus _MD_DeleteSharedMemory( const char *name )
{
PRStatus rc = PR_SUCCESS;
key_t key;
int id;
PRIntn urc;
char ipcname[PR_IPC_NAME_SIZE];
rc = _PR_MakeNativeIPCName( name, ipcname, PR_IPC_NAME_SIZE, _PRIPCShm );
if ( PR_FAILURE == rc )
{
PR_SetError( PR_UNKNOWN_ERROR , errno );
PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,
("_MD_DeleteSharedMemory(): _PR_MakeNativeIPCName() failed: %s", name ));
return(PR_FAILURE);
}
/* create the file first */
{
int osfd = open( ipcname, (O_RDWR | O_CREAT), 0666 );
if ( -1 == osfd ) {
_PR_MD_MAP_OPEN_ERROR( errno );
return( PR_FAILURE );
}
if ( close(osfd) == -1 ) {
_PR_MD_MAP_CLOSE_ERROR( errno );
return( PR_FAILURE );
}
}
/* hash the shm.name to an ID */
key = ftok( ipcname, NSPR_IPC_SHM_KEY );
if ( -1 == key )
{
rc = PR_FAILURE;
_PR_MD_MAP_DEFAULT_ERROR( errno );
PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,
("_MD_DeleteSharedMemory(): ftok() failed on name: %s", ipcname));
}
#ifdef SYMBIAN
/* In Symbian OS the system imposed minimum is 1 byte, instead of ZERO */
id = shmget( key, 1, 0 );
#else
id = shmget( key, 0, 0 );
#endif
if ( -1 == id ) {
_PR_MD_MAP_DEFAULT_ERROR( errno );
PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,
("_MD_DeleteSharedMemory(): shmget() failed, errno: %d", errno));
return(PR_FAILURE);
}
urc = shmctl( id, IPC_RMID, NULL );
if ( -1 == urc )
{
_PR_MD_MAP_DEFAULT_ERROR( errno );
PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,
("_MD_DeleteSharedMemory(): shmctl() failed on name: %s", ipcname ));
return(PR_FAILURE);
}
urc = unlink( ipcname );
if ( -1 == urc ) {
_PR_MD_MAP_UNLINK_ERROR( errno );
PR_LOG( _pr_shm_lm, PR_LOG_DEBUG,
("_MD_DeleteSharedMemory(): unlink() failed: %s", ipcname ));
return(PR_FAILURE);
}
return rc;
} /* end _MD_DeleteSharedMemory() */