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Diffstat (limited to 'pthreads/src/sem_init.c')
| -rw-r--r-- | pthreads/src/sem_init.c | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/pthreads/src/sem_init.c b/pthreads/src/sem_init.c deleted file mode 100644 index f682f4b..0000000 --- a/pthreads/src/sem_init.c +++ /dev/null @@ -1,169 +0,0 @@ -/* - * ------------------------------------------------------------- - * - * Module: sem_init.c - * - * Purpose: - * Semaphores aren't actually part of PThreads. - * They are defined by the POSIX Standard: - * - * POSIX 1003.1-2001 - * - * ------------------------------------------------------------- - * - * 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 "semaphore.h" -#include "implement.h" - -int -sem_init (sem_t * sem, int pshared, unsigned int value) - /* - * ------------------------------------------------------ - * DOCPUBLIC - * This function initializes a semaphore. The - * initial value of the semaphore is 'value' - * - * PARAMETERS - * sem - * pointer to an instance of sem_t - * - * pshared - * if zero, this semaphore may only be shared between - * threads in the same process. - * if nonzero, the semaphore can be shared between - * processes - * - * value - * initial value of the semaphore counter - * - * DESCRIPTION - * This function initializes a semaphore. The - * initial value of the semaphore is set to 'value'. - * - * RESULTS - * 0 successfully created semaphore, - * -1 failed, error in errno - * ERRNO - * EINVAL 'sem' is not a valid semaphore, or - * 'value' >= SEM_VALUE_MAX - * ENOMEM out of memory, - * ENOSPC a required resource has been exhausted, - * ENOSYS semaphores are not supported, - * EPERM the process lacks appropriate privilege - * - * ------------------------------------------------------ - */ -{ - int result = 0; - sem_t s = NULL; - - if (pshared != 0) - { - /* - * Creating a semaphore that can be shared between - * processes - */ - result = EPERM; - } - else if (value > (unsigned int)SEM_VALUE_MAX) - { - result = EINVAL; - } - else - { - s = (sem_t) calloc (1, sizeof (*s)); - - if (NULL == s) - { - result = ENOMEM; - } - else - { - - s->value = value; - if (pthread_mutex_init(&s->lock, NULL) == 0) - { - -#if defined(NEED_SEM) - - s->sem = CreateEvent (NULL, - PTW32_FALSE, /* auto (not manual) reset */ - PTW32_FALSE, /* initial state is unset */ - NULL); - - if (0 == s->sem) - { - free (s); - (void) pthread_mutex_destroy(&s->lock); - result = ENOSPC; - } - else - { - s->leftToUnblock = 0; - } - -#else /* NEED_SEM */ - - if ((s->sem = CreateSemaphore (NULL, /* Always NULL */ - (long) 0, /* Force threads to wait */ - (long) SEM_VALUE_MAX, /* Maximum value */ - NULL)) == 0) /* Name */ - { - (void) pthread_mutex_destroy(&s->lock); - result = ENOSPC; - } - -#endif /* NEED_SEM */ - - } - else - { - result = ENOSPC; - } - - if (result != 0) - { - free(s); - } - } - } - - if (result != 0) - { - errno = result; - return -1; - } - - *sem = s; - - return 0; - -} /* sem_init */ |