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| author | František Dvořák <valtri@users.sourceforge.net> | 2005-09-05 17:10:36 +0000 |
|---|---|---|
| committer | František Dvořák <valtri@users.sourceforge.net> | 2005-09-05 17:10:36 +0000 |
| commit | 458aac8598b866ceb615304db637cf624334f271 (patch) | |
| tree | 849fea8a579dbab0857093eaaea8c89232ae1d50 /win32/contrib/pthreads/semaphore.c | |
| parent | 69a1b10dd38c06f34747e7a55d62fdfcec2883cc (diff) | |
| download | xine-lib-458aac8598b866ceb615304db637cf624334f271.tar.gz xine-lib-458aac8598b866ceb615304db637cf624334f271.tar.bz2 | |
*BUGFIX*
*DRUMS* removing internal old phreads-win32 and zlib
CVS patchset: 7721
CVS date: 2005/09/05 17:10:36
Diffstat (limited to 'win32/contrib/pthreads/semaphore.c')
| -rw-r--r-- | win32/contrib/pthreads/semaphore.c | 557 |
1 files changed, 0 insertions, 557 deletions
diff --git a/win32/contrib/pthreads/semaphore.c b/win32/contrib/pthreads/semaphore.c deleted file mode 100644 index 2f43d05c9..000000000 --- a/win32/contrib/pthreads/semaphore.c +++ /dev/null @@ -1,557 +0,0 @@ -/*
- * -------------------------------------------------------------
- *
- * Module: semaphore.c
- *
- * Purpose:
- * Semaphores aren't actually part of the PThreads standard.
- * They are defined by the POSIX Standard:
- *
- * POSIX 1003.1b-1993 (POSIX.1b)
- *
- * -------------------------------------------------------------
- *
- * Pthreads-win32 - POSIX Threads Library for Win32
- * Copyright (C) 1998
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library 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
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA
- */
-
-/* ignore warning "unreferenced formal parameter" */
-#ifdef _MSC_VER
-#pragma warning( disable : 4100 )
-#endif
-
-#include "pthread.h"
-#include "semaphore.h"
-#include "implement.h"
-
-int
-sem_init (sem_t * sem, int pshared, unsigned int value)
- /*
- * ------------------------------------------------------
- * DOCPUBLIC
- * This function initializes an unnamed semaphore. the
- * initial value of the semaphore is 'value'
- *
- * PARAMETERS
- * sem
- * pointer to an instance of sem_t
- *
- * pshared
- * if zero, this semaphore may only be shared between
- * threads in the same process.
- * if nonzero, the semaphore can be shared between
- * processes
- *
- * value
- * initial value of the semaphore counter
- *
- * DESCRIPTION
- * This function initializes an unnamed semaphore. The
- * initial value of the semaphore is set to 'value'.
- *
- * RESULTS
- * 0 successfully created semaphore,
- * -1 failed, error in errno
- * ERRNO
- * EINVAL 'sem' is not a valid semaphore,
- * ENOSPC a required resource has been exhausted,
- * ENOSYS semaphores are not supported,
- * EPERM the process lacks appropriate privilege
- *
- * ------------------------------------------------------
- */
-{
- int result = 0;
- sem_t s;
-
- if (pshared != 0)
- {
- /*
- * Creating a semaphore that can be shared between
- * processes
- */
- result = EPERM;
-
- }
- else
- {
- s = (sem_t) calloc (1, sizeof (*s));
-
-#ifdef NEED_SEM
-
- if (NULL == s)
- {
- result = ENOMEM;
- }
- else
- {
- s->value = value;
- s->event = CreateEvent (NULL,
- FALSE, /* manual reset */
- FALSE, /* initial state */
- NULL);
- if (0 == s->Event)
- {
- result = ENOSPC;
- }
- else
- {
- if (value != 0)
- {
- SetEvent(s->event);
- }
-
- InitializeCriticalSection(&s->sem_lock_cs);
- }
-
-#else /* NEED_SEM */
-
- s->sem = CreateSemaphore (NULL, /* Always NULL */
- value, /* Initial value */
- 0x7FFFFFFFL, /* Maximum value */
- NULL); /* Name */
-
- if (0 == s->sem)
- {
- result = ENOSPC;
- }
-
-#endif /* NEED_SEM */
-
- }
-
- if (result != 0)
- {
- errno = result;
- return -1;
- }
-
- *sem = s;
-
- return 0;
-
-} /* sem_init */
-
-
-int
-sem_destroy (sem_t * sem)
- /*
- * ------------------------------------------------------
- * DOCPUBLIC
- * This function destroys an unnamed semaphore.
- *
- * PARAMETERS
- * sem
- * pointer to an instance of sem_t
- *
- * DESCRIPTION
- * This function destroys an unnamed semaphore.
- *
- * RESULTS
- * 0 successfully destroyed semaphore,
- * -1 failed, error in errno
- * ERRNO
- * EINVAL 'sem' is not a valid semaphore,
- * ENOSYS semaphores are not supported,
- * EBUSY threads (or processes) are currently
- * blocked on 'sem'
- *
- * ------------------------------------------------------
- */
-{
- int result = 0;
- sem_t s;
-
- if (sem == NULL || *sem == NULL)
- {
- result = EINVAL;
- }
- else
- {
- s = *sem;
- *sem = NULL;
-
-#ifdef NEED_SEM
-
- if (! CloseHandle(s->event))
- {
- *sem = s;
- result = EINVAL;
- }
- else
- {
- DeleteCriticalSection(&s->sem_lock_cs);
- free(s);
- }
-
-#else /* NEED_SEM */
-
- if (! CloseHandle (s->sem))
- {
- *sem = s;
- result = EINVAL;
- }
-
-#endif /* NEED_SEM */
-
- }
-
- if (result != 0)
- {
- errno = result;
- return -1;
- }
-
- return 0;
-
-} /* sem_destroy */
-
-
-int
-sem_trywait (sem_t * sem)
- /*
- * ------------------------------------------------------
- * DOCPUBLIC
- * This function tries to wait on a semaphore.
- *
- * PARAMETERS
- * sem
- * pointer to an instance of sem_t
- *
- * DESCRIPTION
- * This function tries to wait on a semaphore. If the
- * semaphore value is greater than zero, it decreases
- * its value by one. If the semaphore value is zero, then
- * this function returns immediately with the error EAGAIN
- *
- * RESULTS
- * 0 successfully decreased semaphore,
- * -1 failed, error in errno
- * ERRNO
- * EAGAIN the semaphore was already locked,
- * EINVAL 'sem' is not a valid semaphore,
- * ENOSYS semaphores are not supported,
- * EINTR the function was interrupted by a signal,
- * EDEADLK a deadlock condition was detected.
- *
- * ------------------------------------------------------
- */
-{
-#ifdef NEED_SEM
-
- /*
- * not yet implemented!
- */
- int result = EINVAL;
- return -1;
-
-#else /* NEED_SEM */
-
- int result = 0;
-
- if (sem == NULL || *sem == NULL)
- {
- result = EINVAL;
- }
- else if (WaitForSingleObject ((*sem)->sem, 0) == WAIT_TIMEOUT)
- {
- result = EAGAIN;
- }
-
- if (result != 0)
- {
- errno = result;
- return -1;
- }
-
- return 0;
-
-#endif /* NEED_SEM */
-
-} /* sem_trywait */
-
-
-#ifdef NEED_SEM
-
-void
-ptw32_decrease_semaphore(sem_t * sem)
-{
- register sem_t s = *sem;
-
- EnterCriticalSection(&s->sem_lock_cs);
-
- if (s->value != 0)
- {
- s->value--;
- if (s->value != 0)
- {
- SetEvent(s->event);
- }
- }
- else
- {
- /* this case should not happen! */
- }
-
- LeaveCriticalSection(&s->sem_lock_cs);
-}
-
-BOOL
-ptw32_increase_semaphore(sem_t * sem, unsigned int n)
-{
- BOOL result;
- register sem_t s = *sem;
-
- EnterCriticalSection(&s->sem_lock_cs);
-
- if (s->value + n > s->value)
- {
- s->value += n;
- SetEvent(s->event);
- result = TRUE;
- }
- else
- {
- result = FALSE;
- }
-
- LeaveCriticalSection(&s->sem_lock_cs);
- return result;
-}
-
-#endif /* NEED_SEM */
-
-int
-sem_wait (sem_t * sem)
- /*
- * ------------------------------------------------------
- * DOCPUBLIC
- * This function waits on a semaphore.
- *
- * PARAMETERS
- * sem
- * pointer to an instance of sem_t
- *
- * DESCRIPTION
- * This function waits on a semaphore. If the
- * semaphore value is greater than zero, it decreases
- * its value by one. If the semaphore value is zero, then
- * the calling thread (or process) is blocked until it can
- * successfully decrease the value or until interrupted by
- * a signal.
- *
- * RESULTS
- * 0 successfully decreased semaphore,
- * -1 failed, error in errno
- * ERRNO
- * EINVAL 'sem' is not a valid semaphore,
- * ENOSYS semaphores are not supported,
- * EINTR the function was interrupted by a signal,
- * EDEADLK a deadlock condition was detected.
- *
- * ------------------------------------------------------
- */
-{
- int result = 0;
-
- if (sem == NULL || *sem == NULL)
- {
- result = EINVAL;
- }
- else
- {
-
-#ifdef NEED_SEM
-
- result = pthreadCancelableWait ((*sem)->event);
-
-#else /* NEED_SEM */
-
- result = pthreadCancelableWait ((*sem)->sem);
-
-#endif /* NEED_SEM */
-
- }
-
- if (result != 0)
- {
- errno = result;
- return -1;
- }
-
-#ifdef NEED_SEM
-
- ptw32_decrease_semaphore(sem);
-
-#endif /* NEED_SEM */
-
- return 0;
-
-} /* sem_wait */
-
-
-int
-sem_post (sem_t * sem)
- /*
- * ------------------------------------------------------
- * DOCPUBLIC
- * This function posts a wakeup to a semaphore.
- *
- * PARAMETERS
- * sem
- * pointer to an instance of sem_t
- *
- * DESCRIPTION
- * This function posts a wakeup to a semaphore. If there
- * are waiting threads (or processes), one is awakened;
- * otherwise, the semaphore value is incremented by one.
- *
- * RESULTS
- * 0 successfully posted semaphore,
- * -1 failed, error in errno
- * ERRNO
- * EINVAL 'sem' is not a valid semaphore,
- * ENOSYS semaphores are not supported,
- *
- * ------------------------------------------------------
- */
-{
- int result = 0;
-
- if (sem == NULL || *sem == NULL)
- {
- result = EINVAL;
- }
-
-#ifdef NEED_SEM
-
- else if (! ptw32_increase_semaphore (sem, 1))
-
-#else /* NEED_SEM */
-
- else if (! ReleaseSemaphore ((*sem)->sem, 1, 0))
-
-#endif /* NEED_SEM */
-
- {
- result = EINVAL;
- }
-
- if (result != 0)
- {
- errno = result;
- return -1;
- }
-
- return 0;
-
-} /* sem_post */
-
-
-int
-sem_post_multiple (sem_t * sem, int count )
- /*
- * ------------------------------------------------------
- * DOCPUBLIC
- * This function posts multiple wakeups to a semaphore.
- *
- * PARAMETERS
- * sem
- * pointer to an instance of sem_t
- *
- * count
- * counter, must be greater than zero.
- *
- * DESCRIPTION
- * This function posts multiple wakeups to a semaphore. If there
- * are waiting threads (or processes), n <= count are awakened;
- * the semaphore value is incremented by count - n.
- *
- * RESULTS
- * 0 successfully posted semaphore,
- * -1 failed, error in errno
- * ERRNO
- * EINVAL 'sem' is not a valid semaphore
- * or count is less than or equal to zero.
- *
- * ------------------------------------------------------
- */
-{
- int result = 0;
-
- if (sem == NULL || *sem == NULL || count <= 0)
- {
- result = EINVAL;
- }
-
-#ifdef NEED_SEM
-
- else if (! ptw32_increase_semaphore (sem, count))
-
-#else /* NEED_SEM */
-
- else if (! ReleaseSemaphore ((*sem)->sem, count, 0))
-
-#endif /* NEED_SEM */
-
- {
- result = EINVAL;
- }
-
- if (result != 0)
- {
- errno = result;
- return -1;
- }
-
- return 0;
-
-} /* sem_post_multiple */
-
-
-int
-sem_open (const char * name, int oflag, mode_t mode, unsigned int value)
-{
- errno = ENOSYS;
- return -1;
-} /* sem_open */
-
-
-int
-sem_close (sem_t * sem)
-{
- errno = ENOSYS;
- return -1;
-} /* sem_close */
-
-
-int
-sem_unlink (const char * name)
-{
- errno = ENOSYS;
- return -1;
-} /* sem_unlink */
-
-
-int
-sem_getvalue (sem_t * sem, int * sval)
-{
- errno = ENOSYS;
- return -1;
-} /* sem_getvalue */
-
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