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Provide a default implementation of interprocess named semaphore

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functions (which just fail with PR_NOT_IMPLEMENTED_ERROR) if neither
POSIX nor System V semaphores are supported.  Fixed an error in the
comments.


git-svn-id: svn://10.0.0.236/trunk@63749 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
wtc%netscape.com 2000-03-22 18:21:12 +00:00
parent 8c63097a16
commit 91de97c45a
1 changed files with 47 additions and 5 deletions
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52
mozilla/nsprpub/pr/src/pthreads/ptsynch.c
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@ -248,7 +248,7 @@ static PRIntn pt_TimedWait(
/*
* Notifies just get posted to the to the protecting mutex. The
* Notifies just get posted to the protecting mutex. The
* actual notification is done when the lock is released so that
* MP systems don't contend for a lock that they can't have.
*/
@ -649,6 +649,14 @@ PR_IMPLEMENT(PRSemaphore*) PR_NewSem(PRUintn value)
return NULL;
}
/*
* Define the interprocess named semaphore functions.
* There are three implementations:
* 1. POSIX semaphore based;
* 2. System V semaphore based;
* 3. unsupported (fails with PR_NOT_IMPLEMENTED_ERROR).
*/
#ifdef _PR_HAVE_POSIX_SEMAPHORES
#include <fcntl.h>
@ -750,9 +758,7 @@ PR_IMPLEMENT(PRStatus) PR_DeleteSemaphore(const char *name)
return PR_SUCCESS;
}
#endif /* _PR_HAVE_POSIX_SEMAPHORES */
#ifdef _PR_HAVE_SYSV_SEMAPHORES
#elif defined(_PR_HAVE_SYSV_SEMAPHORES)
#include <fcntl.h>
#include <sys/sem.h>
@ -961,7 +967,43 @@ PR_IMPLEMENT(PRStatus) PR_DeleteSemaphore(const char *name)
return PR_SUCCESS;
}
#endif /* _PR_HAVE_SYSV_SEMAPHORES */
#else /* neither POSIX nor System V semaphores are available */
PR_IMPLEMENT(PRSem *) PR_OpenSemaphore(
const char *name,
PRIntn flags,
PRIntn mode,
PRUintn value)
{
PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
return NULL;
}
PR_IMPLEMENT(PRStatus) PR_WaitSemaphore(PRSem *sem)
{
PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
return PR_FAILURE;
}
PR_IMPLEMENT(PRStatus) PR_PostSemaphore(PRSem *sem)
{
PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
return PR_FAILURE;
}
PR_IMPLEMENT(PRStatus) PR_CloseSemaphore(PRSem *sem)
{
PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
return PR_FAILURE;
}
PR_IMPLEMENT(PRStatus) PR_DeleteSemaphore(const char *name)
{
PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
return PR_FAILURE;
}
#endif /* end of interprocess named semaphore functions */
/**************************************************************/
/**************************************************************/