diff options
Diffstat (limited to 'pthreads/pthread_rwlockattr_setpshared.c')
| -rw-r--r-- | pthreads/pthread_rwlockattr_setpshared.c | 241 |
1 files changed, 120 insertions, 121 deletions
diff --git a/pthreads/pthread_rwlockattr_setpshared.c b/pthreads/pthread_rwlockattr_setpshared.c index 316532cb2..76d71fabe 100644 --- a/pthreads/pthread_rwlockattr_setpshared.c +++ b/pthreads/pthread_rwlockattr_setpshared.c @@ -1,121 +1,120 @@ -/* - * pthread_rwlockattr_setpshared.c - * - * Description: - * This translation unit implements read/write lock primitives. - * - * -------------------------------------------------------------------------- - * - * 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 <errno.h> -#include <limits.h> - -#include "pthread.h" -#include "implement.h" - -int -pthread_rwlockattr_setpshared (pthread_rwlockattr_t * attr, int pshared) - /* - * ------------------------------------------------------ - * DOCPUBLIC - * Rwlocks created with 'attr' can be shared between - * processes if pthread_rwlock_t variable is allocated - * in memory shared by these processes. - * - * PARAMETERS - * attr - * pointer to an instance of pthread_rwlockattr_t - * - * pshared - * must be one of: - * - * PTHREAD_PROCESS_SHARED - * May be shared if in shared memory - * - * PTHREAD_PROCESS_PRIVATE - * Cannot be shared. - * - * DESCRIPTION - * Rwlocks creatd with 'attr' can be shared between - * processes if pthread_rwlock_t variable is allocated - * in memory shared by these processes. - * - * NOTES: - * 1) pshared rwlocks MUST be allocated in shared - * memory. - * - * 2) The following macro is defined if shared rwlocks - * are supported: - * _POSIX_THREAD_PROCESS_SHARED - * - * RESULTS - * 0 successfully set attribute, - * EINVAL 'attr' or pshared is invalid, - * ENOSYS PTHREAD_PROCESS_SHARED not supported, - * - * ------------------------------------------------------ - */ -{ - int result; - - if ((attr != NULL && *attr != NULL) && - ((pshared == PTHREAD_PROCESS_SHARED) || - (pshared == PTHREAD_PROCESS_PRIVATE))) - { - if (pshared == PTHREAD_PROCESS_SHARED) - { - -#if !defined( _POSIX_THREAD_PROCESS_SHARED ) - - result = ENOSYS; - pshared = PTHREAD_PROCESS_PRIVATE; - -#else - - result = 0; - -#endif /* _POSIX_THREAD_PROCESS_SHARED */ - - } - else - { - result = 0; - } - - (*attr)->pshared = pshared; - } - else - { - result = EINVAL; - } - - return (result); - -} /* pthread_rwlockattr_setpshared */ +/*
+ * pthread_rwlockattr_setpshared.c
+ *
+ * Description:
+ * This translation unit implements read/write lock primitives.
+ *
+ * --------------------------------------------------------------------------
+ *
+ * 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 <limits.h>
+
+#include "pthread.h"
+#include "implement.h"
+
+int
+pthread_rwlockattr_setpshared (pthread_rwlockattr_t * attr, int pshared)
+ /*
+ * ------------------------------------------------------
+ * DOCPUBLIC
+ * Rwlocks created with 'attr' can be shared between
+ * processes if pthread_rwlock_t variable is allocated
+ * in memory shared by these processes.
+ *
+ * PARAMETERS
+ * attr
+ * pointer to an instance of pthread_rwlockattr_t
+ *
+ * pshared
+ * must be one of:
+ *
+ * PTHREAD_PROCESS_SHARED
+ * May be shared if in shared memory
+ *
+ * PTHREAD_PROCESS_PRIVATE
+ * Cannot be shared.
+ *
+ * DESCRIPTION
+ * Rwlocks creatd with 'attr' can be shared between
+ * processes if pthread_rwlock_t variable is allocated
+ * in memory shared by these processes.
+ *
+ * NOTES:
+ * 1) pshared rwlocks MUST be allocated in shared
+ * memory.
+ *
+ * 2) The following macro is defined if shared rwlocks
+ * are supported:
+ * _POSIX_THREAD_PROCESS_SHARED
+ *
+ * RESULTS
+ * 0 successfully set attribute,
+ * EINVAL 'attr' or pshared is invalid,
+ * ENOSYS PTHREAD_PROCESS_SHARED not supported,
+ *
+ * ------------------------------------------------------
+ */
+{
+ int result;
+
+ if ((attr != NULL && *attr != NULL) &&
+ ((pshared == PTHREAD_PROCESS_SHARED) ||
+ (pshared == PTHREAD_PROCESS_PRIVATE)))
+ {
+ if (pshared == PTHREAD_PROCESS_SHARED)
+ {
+
+#if !defined( _POSIX_THREAD_PROCESS_SHARED )
+
+ result = ENOSYS;
+ pshared = PTHREAD_PROCESS_PRIVATE;
+
+#else
+
+ result = 0;
+
+#endif /* _POSIX_THREAD_PROCESS_SHARED */
+
+ }
+ else
+ {
+ result = 0;
+ }
+
+ (*attr)->pshared = pshared;
+ }
+ else
+ {
+ result = EINVAL;
+ }
+
+ return (result);
+
+} /* pthread_rwlockattr_setpshared */
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