diff options
Diffstat (limited to 'pthreads/pthread_mutex_init.c')
-rw-r--r-- | pthreads/pthread_mutex_init.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/pthreads/pthread_mutex_init.c b/pthreads/pthread_mutex_init.c new file mode 100644 index 000000000..cff8e5054 --- /dev/null +++ b/pthreads/pthread_mutex_init.c @@ -0,0 +1,104 @@ +/* + * pthread_mutex_init.c + * + * Description: + * This translation unit implements mutual exclusion (mutex) 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_mutex_init (pthread_mutex_t * mutex, const pthread_mutexattr_t * attr) +{ + int result = 0; + pthread_mutex_t mx; + + if (mutex == NULL) + { + return EINVAL; + } + + if (attr != NULL + && *attr != NULL && (*attr)->pshared == PTHREAD_PROCESS_SHARED) + { + /* + * Creating mutex that can be shared between + * processes. + */ +#if _POSIX_THREAD_PROCESS_SHARED >= 0 + + /* + * Not implemented yet. + */ + +#error ERROR [__FILE__, line __LINE__]: Process shared mutexes are not supported yet. + +#else + + return ENOSYS; + +#endif /* _POSIX_THREAD_PROCESS_SHARED */ + + } + + mx = (pthread_mutex_t) calloc (1, sizeof (*mx)); + + if (mx == NULL) + { + result = ENOMEM; + } + else + { + mx->lock_idx = 0; + mx->recursive_count = 0; + mx->kind = (attr == NULL || *attr == NULL + ? PTHREAD_MUTEX_DEFAULT : (*attr)->kind); + mx->ownerThread.p = NULL; + + mx->event = CreateEvent (NULL, PTW32_FALSE, /* manual reset = No */ + PTW32_FALSE, /* initial state = not signaled */ + NULL); /* event name */ + + if (0 == mx->event) + { + result = ENOSPC; + free (mx); + mx = NULL; + } + } + + *mutex = mx; + + return (result); +} |