diff options
Diffstat (limited to 'pthreads/pthread_rwlockattr_setpshared.c')
| -rw-r--r-- | pthreads/pthread_rwlockattr_setpshared.c | 245 |
1 files changed, 125 insertions, 120 deletions
diff --git a/pthreads/pthread_rwlockattr_setpshared.c b/pthreads/pthread_rwlockattr_setpshared.c index 76d71fabe..0263c11f9 100644 --- a/pthreads/pthread_rwlockattr_setpshared.c +++ b/pthreads/pthread_rwlockattr_setpshared.c @@ -1,120 +1,125 @@ -/*
- * 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 */
+/* + * 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) 1999,2012 Pthreads-win32 contributors + * + * Homepage1: http://sourceware.org/pthreads-win32/ + * Homepage2: http://sourceforge.net/projects/pthreads4w/ + * + * 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 + */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#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 */ |