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authorrpj <rpj>2005-04-25 00:48:05 +0000
committerrpj <rpj>2005-04-25 00:48:05 +0000
commitc2c2749315183f102d8967f37a43394fd39c5abd (patch)
treef56b6fe441eb07ca9de08ea6cc120a45437da5f6 /sem_init.c
parent150a7a6e99d3cf8fd0b6315e7b184b5cce0f4ce4 (diff)
Fix NEED_SEM code (WinCE)
Diffstat (limited to 'sem_init.c')
-rw-r--r--sem_init.c331
1 files changed, 164 insertions, 167 deletions
diff --git a/sem_init.c b/sem_init.c
index 1b9cd6e..ef9ba29 100644
--- a/sem_init.c
+++ b/sem_init.c
@@ -1,167 +1,164 @@
-/*
- * -------------------------------------------------------------
- *
- * Module: sem_init.c
- *
- * Purpose:
- * Semaphores aren't actually part of PThreads.
- * They are defined by the POSIX Standard:
- *
- * POSIX 1003.1-2001
- *
- * -------------------------------------------------------------
- *
- * 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_init (sem_t * sem, int pshared, unsigned int value)
- /*
- * ------------------------------------------------------
- * DOCPUBLIC
- * This function initializes a 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 a 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,
- * ENOMEM out of memory,
- * ENOSPC a required resource has been exhausted,
- * ENOSYS semaphores are not supported,
- * EPERM the process lacks appropriate privilege
- *
- * ------------------------------------------------------
- */
-{
- int result = 0;
- sem_t s = NULL;
-
- if (pshared != 0)
- {
- /*
- * Creating a semaphore that can be shared between
- * processes
- */
- result = EPERM;
- }
- else
- {
- s = (sem_t) calloc (1, sizeof (*s));
-
- if (NULL == s)
- {
- result = ENOMEM;
- }
- else
- {
-
-#ifdef NEED_SEM
-
- s->value = value;
- s->event = CreateEvent (NULL, PTW32_FALSE, /* manual reset */
- PTW32_FALSE, /* initial state */
- NULL);
-
- if (0 == s->event)
- {
- free (s);
- result = ENOSPC;
- }
- else
- {
- if (value != 0)
- {
- SetEvent (s->event);
- }
-
- InitializeCriticalSection (&s->sem_lock_cs);
- }
-
-#else /* NEED_SEM */
-
- s->value = value;
- if (pthread_mutex_init(&s->lock, NULL) == 0)
- {
- if ((s->sem = CreateSemaphore (NULL, /* Always NULL */
- (long) 0, /* Force threads to wait */
- (long) _POSIX_SEM_VALUE_MAX, /* Maximum value */
- NULL)) == 0) /* Name */
- {
- (void) pthread_mutex_destroy(&s->lock);
- result = ENOSPC;
- }
- }
- else
- {
- result = ENOSPC;
- }
-
- if (result != 0)
- {
- free(s);
- }
-
-#endif /* NEED_SEM */
-
- }
- }
-
- if (result != 0)
- {
- errno = result;
- return -1;
- }
-
- *sem = s;
-
- return 0;
-
-} /* sem_init */
+/*
+ * -------------------------------------------------------------
+ *
+ * Module: sem_init.c
+ *
+ * Purpose:
+ * Semaphores aren't actually part of PThreads.
+ * They are defined by the POSIX Standard:
+ *
+ * POSIX 1003.1-2001
+ *
+ * -------------------------------------------------------------
+ *
+ * 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_init (sem_t * sem, int pshared, unsigned int value)
+ /*
+ * ------------------------------------------------------
+ * DOCPUBLIC
+ * This function initializes a 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 a 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,
+ * ENOMEM out of memory,
+ * ENOSPC a required resource has been exhausted,
+ * ENOSYS semaphores are not supported,
+ * EPERM the process lacks appropriate privilege
+ *
+ * ------------------------------------------------------
+ */
+{
+ int result = 0;
+ sem_t s = NULL;
+
+ if (pshared != 0)
+ {
+ /*
+ * Creating a semaphore that can be shared between
+ * processes
+ */
+ result = EPERM;
+ }
+ else
+ {
+ s = (sem_t) calloc (1, sizeof (*s));
+
+ if (NULL == s)
+ {
+ result = ENOMEM;
+ }
+ else
+ {
+
+ s->value = value;
+ if (pthread_mutex_init(&s->lock, NULL) == 0)
+ {
+
+#ifdef NEED_SEM
+
+ s->sem = CreateEvent (NULL,
+ PTW32_FALSE, /* auto (not manual) reset */
+ PTW32_FALSE, /* initial state is unset */
+ NULL);
+
+ if (0 == s->sem)
+ {
+ free (s);
+ (void) pthread_mutex_destroy(&s->lock);
+ result = ENOSPC;
+ }
+ else
+ {
+ s->leftToUnblock = 0;
+ }
+
+#else /* NEED_SEM */
+
+ if ((s->sem = CreateSemaphore (NULL, /* Always NULL */
+ (long) 0, /* Force threads to wait */
+ (long) _POSIX_SEM_VALUE_MAX, /* Maximum value */
+ NULL)) == 0) /* Name */
+ {
+ (void) pthread_mutex_destroy(&s->lock);
+ result = ENOSPC;
+ }
+
+#endif /* NEED_SEM */
+
+ }
+ else
+ {
+ result = ENOSPC;
+ }
+
+ if (result != 0)
+ {
+ free(s);
+ }
+ }
+ }
+
+ if (result != 0)
+ {
+ errno = result;
+ return -1;
+ }
+
+ *sem = s;
+
+ return 0;
+
+} /* sem_init */