118 lines
3.7 KiB
C
118 lines
3.7 KiB
C
|
/*
|
||
|
|
* 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.,
|
||
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 */
|