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-rw-r--r--sem_destroy.c300
1 files changed, 146 insertions, 154 deletions
diff --git a/sem_destroy.c b/sem_destroy.c
index c6cbc22..c260d41 100644
--- a/sem_destroy.c
+++ b/sem_destroy.c
@@ -1,154 +1,146 @@
-/*
- * -------------------------------------------------------------
- *
- * Module: sem_destroy.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 John E. Bossom
- * Copyright(C) 1999,2005 Pthreads-win32 contributors
- *
- * Contact Email: rpj@callisto.canberra.edu.au
- *
- * The current list of contributors is contained
- * in the file CONTRIBUTORS included with the source
- * code distribution. The list can also be seen at the
- * following World Wide Web location:
- * http://sources.redhat.com/pthreads-win32/contributors.html
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library in the file COPYING.LIB;
- * if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
- */
-
-#include "pthread.h"
-#include "semaphore.h"
-#include "implement.h"
-
-
-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 = NULL;
-
- 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);
- }
-
-#else /* NEED_SEM */
-
- if ((result = pthread_mutex_trylock (&s->lock)) == 0)
- {
- if (s->value >= 0)
- {
- (void) pthread_mutex_unlock (&s->lock);
-
- if (!CloseHandle (s->sem))
- {
- *sem = s;
- result = EINVAL;
- }
- else if ((result = pthread_mutex_destroy (&s->lock)) != 0)
- {
- s->sem = CreateSemaphore (NULL, /* Always NULL */
- (long) 0, /* Force threads to wait */
- (long) _POSIX_SEM_VALUE_MAX, /* Maximum value */
- NULL); /* Name */
- if (s->sem == 0)
- {
- /* We just have to pretend that we've destroyed the semaphore
- * even though we're leaving a mutex around.
- */
- result = 0;
- }
- else
- {
- *sem = s;
- if (result != EBUSY)
- result = EINVAL;
- }
- }
- }
- else
- {
- (void) pthread_mutex_unlock (&s->lock);
- result = EBUSY;
- }
- }
-
-#endif /* NEED_SEM */
-
- }
-
- if (result != 0)
- {
- errno = result;
- return -1;
- }
-
- free (s);
-
- return 0;
-
-} /* sem_destroy */
+/*
+ * -------------------------------------------------------------
+ *
+ * Module: sem_destroy.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 John E. Bossom
+ * Copyright(C) 1999,2005 Pthreads-win32 contributors
+ *
+ * Contact Email: rpj@callisto.canberra.edu.au
+ *
+ * The current list of contributors is contained
+ * in the file CONTRIBUTORS included with the source
+ * code distribution. The list can also be seen at the
+ * following World Wide Web location:
+ * http://sources.redhat.com/pthreads-win32/contributors.html
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library in the file COPYING.LIB;
+ * if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include "pthread.h"
+#include "semaphore.h"
+#include "implement.h"
+
+
+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 = NULL;
+
+ if (sem == NULL || *sem == NULL)
+ {
+ result = EINVAL;
+ }
+ else
+ {
+ s = *sem;
+ *sem = NULL;
+
+ if ((result = pthread_mutex_trylock (&s->lock)) == 0)
+ {
+ if (s->value >= 0)
+ {
+ (void) pthread_mutex_unlock (&s->lock);
+
+ if (!CloseHandle (s->sem))
+ {
+ *sem = s;
+ result = EINVAL;
+ }
+ else if ((result = pthread_mutex_destroy (&s->lock)) != 0)
+ {
+
+#ifdef NEED_SEM
+ s->sem = CreateEvent (NULL,
+ PTW32_FALSE, /* manual reset is false */
+ PTW32_FALSE, /* initial state is unset */
+ NULL);
+#else
+ s->sem = CreateSemaphore (NULL, /* Always NULL */
+ (long) 0, /* Force threads to wait */
+ (long) _POSIX_SEM_VALUE_MAX, /* Maximum value */
+ NULL); /* Name */
+#endif
+
+ if (s->sem == 0)
+ {
+ /* We just have to pretend that we've destroyed the semaphore
+ * even though we're leaving a mutex around.
+ */
+ result = 0;
+ }
+ else
+ {
+ *sem = s;
+ if (result != EBUSY)
+ result = EINVAL;
+ }
+ }
+ }
+ else
+ {
+ (void) pthread_mutex_unlock (&s->lock);
+ result = EBUSY;
+ }
+ }
+ }
+
+ if (result != 0)
+ {
+ errno = result;
+ return -1;
+ }
+
+ free (s);
+
+ return 0;
+
+} /* sem_destroy */
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