| /* |
| * pthread_condattr_setpshared.c |
| * |
| * Description: |
| * This translation unit implements condition variables and their 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 "pthread.h" |
| #include "implement.h" |
| |
| |
| int |
| pthread_condattr_setpshared (pthread_condattr_t * attr, int pshared) |
| /* |
| * ------------------------------------------------------ |
| * DOCPUBLIC |
| * Mutexes created with 'attr' can be shared between |
| * processes if pthread_mutex_t variable is allocated |
| * in memory shared by these processes. |
| * |
| * PARAMETERS |
| * attr |
| * pointer to an instance of pthread_mutexattr_t |
| * |
| * pshared |
| * must be one of: |
| * |
| * PTHREAD_PROCESS_SHARED |
| * May be shared if in shared memory |
| * |
| * PTHREAD_PROCESS_PRIVATE |
| * Cannot be shared. |
| * |
| * DESCRIPTION |
| * Mutexes creatd with 'attr' can be shared between |
| * processes if pthread_mutex_t variable is allocated |
| * in memory shared by these processes. |
| * |
| * NOTES: |
| * 1) pshared mutexes MUST be allocated in shared |
| * memory. |
| * |
| * 2) The following macro is defined if shared mutexes |
| * 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_condattr_setpshared */ |
