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Diffstat (limited to 'libpthread/linuxthreads.old/semaphore.h')
| -rw-r--r-- | libpthread/linuxthreads.old/semaphore.h | 97 | 
1 files changed, 97 insertions, 0 deletions
| diff --git a/libpthread/linuxthreads.old/semaphore.h b/libpthread/linuxthreads.old/semaphore.h new file mode 100644 index 000000000..9a9b72c9e --- /dev/null +++ b/libpthread/linuxthreads.old/semaphore.h @@ -0,0 +1,97 @@ +/* Linuxthreads - a simple clone()-based implementation of Posix        */ +/* threads for Linux.                                                   */ +/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr)              */ +/*                                                                      */ +/* This program is free software; you can redistribute it and/or        */ +/* modify it under the terms of the GNU Library General Public License  */ +/* as published by the Free Software Foundation; either version 2       */ +/* of the License, or (at your option) any later version.               */ +/*                                                                      */ +/* This program 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 Library General Public License for more details.                 */ + +#ifndef _SEMAPHORE_H +#define _SEMAPHORE_H	1 + +#include <features.h> +#include <sys/types.h> +#include <limits.h> +#ifdef __USE_XOPEN2K +# define __need_timespec +# include <time.h> +#endif + +#ifndef _PTHREAD_DESCR_DEFINED +/* Thread descriptors.  Needed for `sem_t' definition.  */ +typedef struct _pthread_descr_struct *_pthread_descr; +# define _PTHREAD_DESCR_DEFINED +#endif + +/* System specific semaphore definition.  */ +typedef struct +{ +  struct _pthread_fastlock __sem_lock; +  int __sem_value; +  _pthread_descr __sem_waiting; +} sem_t; + + + +/* Value returned if `sem_open' failed.  */ +#define SEM_FAILED	((sem_t *) 0) + +/* Maximum value the semaphore can have.  */ +#ifndef SEM_VALUE_MAX +#define SEM_VALUE_MAX	((int) ((~0u) >> 1)) +#endif + + +__BEGIN_DECLS + +/* Initialize semaphore object SEM to VALUE.  If PSHARED then share it +   with other processes.  */ +extern int sem_init (sem_t *__sem, int __pshared, unsigned int __value) __THROW; + +/* Free resources associated with semaphore object SEM.  */ +extern int sem_destroy (sem_t *__sem) __THROW; + +/* Open a named semaphore NAME with open flags OFLAG.  */ +extern sem_t *sem_open (const char *__name, int __oflag, ...) __THROW; + +/* Close descriptor for named semaphore SEM.  */ +extern int sem_close (sem_t *__sem) __THROW; + +/* Remove named semaphore NAME.  */ +extern int sem_unlink (const char *__name) __THROW; + +/* Wait for SEM being posted. + +   This function is a cancellation point and therefore not marked with +   __THROW.  */ +extern int sem_wait (sem_t *__sem); + +#ifdef __USE_XOPEN2K +/* Similar to `sem_wait' but wait only until ABSTIME. + +   This function is a cancellation point and therefore not marked with +   __THROW.  */ +extern int sem_timedwait (sem_t *__restrict __sem, +			  const struct timespec *__restrict __abstime); +#endif + +/* Test whether SEM is posted.  */ +extern int sem_trywait (sem_t *__sem) __THROW; + +/* Post SEM.  */ +extern int sem_post (sem_t *__sem) __THROW; + +/* Get current value of SEM and store it in *SVAL.  */ +extern int sem_getvalue (sem_t *__restrict __sem, int *__restrict __sval) +     __THROW; + + +__END_DECLS + +#endif	/* semaphore.h */ | 
