2000-02-13 05:31:35 +01:00
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/*****************************************************************************
|
2000-03-09 13:30:15 +01:00
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* threads.h : threads implementation for the VideoLAN client
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* This header provides a portable threads implementation.
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2000-03-03 08:03:34 +01:00
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*****************************************************************************
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* Copyright (C) 1999, 2000 VideoLAN
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2001-03-21 14:42:35 +01:00
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* $Id: threads.h,v 1.16 2001/03/21 13:42:33 sam Exp $
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2000-03-03 08:03:34 +01:00
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*
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2000-03-09 13:30:15 +01:00
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* Authors: Jean-Marc Dressler <polux@via.ecp.fr>
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* Samuel Hocevar <sam@via.ecp.fr>
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2000-03-03 08:03:34 +01:00
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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2000-05-25 00:39:44 +02:00
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*
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2000-03-03 08:03:34 +01:00
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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2000-05-25 00:39:44 +02:00
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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2000-03-03 08:03:34 +01:00
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*
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2000-05-25 00:39:44 +02:00
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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2000-02-13 05:31:35 +01:00
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|
*****************************************************************************/
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2000-03-03 08:03:34 +01:00
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2000-04-20 00:13:38 +02:00
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#include <stdio.h>
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2000-03-09 13:30:15 +01:00
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#if defined(HAVE_PTHREAD_H) /* pthreads (Linux & BSD for example) */
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#include <pthread.h>
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2000-03-10 01:47:17 +01:00
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2000-03-09 13:30:15 +01:00
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#elif defined(HAVE_CTHREADS_H) /* GNUMach */
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2000-03-03 01:59:56 +01:00
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#include <cthreads.h>
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2000-03-10 01:47:17 +01:00
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2000-03-11 01:05:16 +01:00
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#elif defined(HAVE_KERNEL_SCHEDULER_H) && defined(HAVE_KERNEL_OS_H) /* BeOS */
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2000-04-20 00:13:38 +02:00
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#undef MAX
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#undef MIN
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2000-03-04 23:33:01 +01:00
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#include <kernel/OS.h>
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#include <kernel/scheduler.h>
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2000-08-15 19:40:40 +02:00
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#include <byteorder.h>
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2000-03-09 13:30:15 +01:00
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#else
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#error no threads available on your system !
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2000-03-03 01:59:56 +01:00
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#endif
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1999-12-08 16:22:59 +01:00
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2000-02-13 05:31:35 +01:00
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/*****************************************************************************
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2000-01-11 00:36:06 +01:00
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* Constants
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2000-02-13 05:31:35 +01:00
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*****************************************************************************
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* These constants are used by all threads in *_CreateThread() and
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2000-01-11 00:36:06 +01:00
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* *_DestroyThreads() functions. Since those calls are non-blocking, an integer
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* value is used as a shared flag to represent the status of the thread.
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2000-02-13 05:31:35 +01:00
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*****************************************************************************/
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2000-01-11 00:36:06 +01:00
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2000-03-09 13:30:15 +01:00
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/* Void status - this value can be used to make sure no operation is currently
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* in progress on the concerned thread in an array of recorded threads */
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2000-02-13 05:31:35 +01:00
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#define THREAD_NOP 0 /* nothing happened */
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2000-01-11 00:36:06 +01:00
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/* Creation status */
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2000-02-13 05:31:35 +01:00
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#define THREAD_CREATE 10 /* thread is initializing */
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#define THREAD_START 11 /* thread has forked */
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#define THREAD_READY 19 /* thread is ready */
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1999-12-08 16:22:59 +01:00
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2000-01-11 00:36:06 +01:00
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/* Destructions status */
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2000-02-13 05:31:35 +01:00
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#define THREAD_DESTROY 20 /* destruction order has been sent */
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#define THREAD_END 21 /* destruction order has been received */
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#define THREAD_OVER 29 /* thread does not exist any more */
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2000-01-11 00:36:06 +01:00
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/* Error status */
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2000-02-13 05:31:35 +01:00
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#define THREAD_ERROR 30 /* an error occured */
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#define THREAD_FATAL 31 /* an fatal error occured - program must end */
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2000-01-11 00:36:06 +01:00
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2000-02-13 05:31:35 +01:00
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/*****************************************************************************
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2000-01-11 00:36:06 +01:00
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* Types definition
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2000-02-13 05:31:35 +01:00
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*****************************************************************************/
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2000-03-03 01:59:56 +01:00
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2001-01-07 04:56:40 +01:00
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#if defined(HAVE_PTHREAD_H)
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typedef pthread_t vlc_thread_t;
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typedef pthread_mutex_t vlc_mutex_t;
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typedef pthread_cond_t vlc_cond_t;
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#elif defined(HAVE_CTHREADS_H)
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2000-03-03 01:59:56 +01:00
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typedef cthread_t vlc_thread_t;
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/* those structs are the ones defined in /include/cthreads.h but we need
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2000-03-09 13:30:15 +01:00
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* to handle (*foo) where foo is a (mutex_t) while they handle (foo) where
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* foo is a (mutex_t*) */
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2000-03-03 01:59:56 +01:00
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typedef struct s_mutex {
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spin_lock_t held;
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spin_lock_t lock;
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char *name;
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struct cthread_queue queue;
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} vlc_mutex_t;
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typedef struct s_condition {
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spin_lock_t lock;
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struct cthread_queue queue;
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char *name;
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struct cond_imp *implications;
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} vlc_cond_t;
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2000-03-11 01:05:16 +01:00
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#elif defined(HAVE_KERNEL_SCHEDULER_H) && defined(HAVE_KERNEL_OS_H)
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2000-03-04 23:33:01 +01:00
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2000-08-21 21:57:55 +02:00
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/* This is the BeOS implementation of the vlc thread, note that the mutex is
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* not a real mutex and the cond_var is not like a pthread cond_var but it is
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* enough for what wee need */
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2000-03-04 23:33:01 +01:00
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typedef thread_id vlc_thread_t;
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typedef struct
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{
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int32 init;
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sem_id lock;
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} vlc_mutex_t;
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typedef struct
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{
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int32 init;
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2000-08-21 21:57:55 +02:00
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thread_id thread;
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2000-03-04 23:33:01 +01:00
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} vlc_cond_t;
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2000-03-09 13:30:15 +01:00
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#endif
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2000-03-03 01:59:56 +01:00
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2000-01-11 00:36:06 +01:00
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typedef void *(*vlc_thread_func_t)(void *p_data);
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1999-12-08 16:22:59 +01:00
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2000-02-13 05:31:35 +01:00
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/*****************************************************************************
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1999-12-08 16:22:59 +01:00
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* Prototypes
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2000-02-13 05:31:35 +01:00
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*****************************************************************************/
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1999-12-08 16:22:59 +01:00
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2000-01-11 00:36:06 +01:00
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static __inline__ int vlc_thread_create( vlc_thread_t *p_thread, char *psz_name,
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2000-02-14 09:44:59 +01:00
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vlc_thread_func_t func, void *p_data );
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2000-01-11 00:36:06 +01:00
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static __inline__ void vlc_thread_exit ( void );
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static __inline__ void vlc_thread_join ( vlc_thread_t thread );
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1999-12-08 16:22:59 +01:00
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2001-01-07 04:56:40 +01:00
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static __inline__ int vlc_mutex_init ( vlc_mutex_t *p_mutex );
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static __inline__ int vlc_mutex_lock ( vlc_mutex_t *p_mutex );
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static __inline__ int vlc_mutex_unlock ( vlc_mutex_t *p_mutex );
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static __inline__ int vlc_mutex_destroy ( vlc_mutex_t *p_mutex );
|
1999-12-08 16:22:59 +01:00
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2000-01-11 00:36:06 +01:00
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static __inline__ int vlc_cond_init ( vlc_cond_t *p_condvar );
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static __inline__ int vlc_cond_signal ( vlc_cond_t *p_condvar );
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static __inline__ int vlc_cond_wait ( vlc_cond_t *p_condvar, vlc_mutex_t *p_mutex );
|
2001-01-07 04:56:40 +01:00
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static __inline__ int vlc_cond_destroy ( vlc_cond_t *p_condvar );
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1999-12-08 16:22:59 +01:00
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2000-02-23 04:04:50 +01:00
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#if 0
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static _inline__ int vlc_cond_timedwait ( vlc_cond_t * condvar, vlc_mutex_t * mutex,
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mtime_t absoute_timeout_time );
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#endif
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1999-12-08 16:22:59 +01:00
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2000-02-13 05:31:35 +01:00
|
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|
/*****************************************************************************
|
2000-01-11 00:36:06 +01:00
|
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* vlc_thread_create: create a thread
|
2000-02-13 05:31:35 +01:00
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|
*****************************************************************************/
|
2000-01-11 00:36:06 +01:00
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static __inline__ int vlc_thread_create( vlc_thread_t *p_thread,
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2000-02-14 09:44:59 +01:00
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char *psz_name, vlc_thread_func_t func,
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void *p_data)
|
1999-12-08 16:22:59 +01:00
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{
|
2001-01-07 05:31:18 +01:00
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#if defined(HAVE_PTHREAD_H)
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|
return pthread_create( p_thread, NULL, func, p_data );
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#elif defined(HAVE_CTHREADS_H)
|
2000-03-03 01:59:56 +01:00
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*p_thread = cthread_fork( (cthread_fn_t)func, (any_t)p_data );
|
2000-04-14 06:19:51 +02:00
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return 0;
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2000-03-04 23:33:01 +01:00
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2000-03-11 01:05:16 +01:00
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|
#elif defined(HAVE_KERNEL_SCHEDULER_H) && defined(HAVE_KERNEL_OS_H)
|
2000-04-14 06:19:51 +02:00
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*p_thread = spawn_thread( (thread_func)func, psz_name,
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B_NORMAL_PRIORITY, p_data );
|
2000-03-04 23:33:01 +01:00
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return resume_thread( *p_thread );
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|
2000-03-03 01:59:56 +01:00
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#endif
|
1999-12-08 16:22:59 +01:00
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}
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2000-02-13 05:31:35 +01:00
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/*****************************************************************************
|
2000-01-11 00:36:06 +01:00
|
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|
* vlc_thread_exit: terminate a thread
|
2000-02-13 05:31:35 +01:00
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|
*****************************************************************************/
|
2000-01-11 00:36:06 +01:00
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static __inline__ void vlc_thread_exit( void )
|
1999-12-08 16:22:59 +01:00
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{
|
2001-01-07 04:56:40 +01:00
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|
#if defined(HAVE_PTHREAD_H)
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pthread_exit( 0 );
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#elif defined(HAVE_CTHREADS_H)
|
2000-03-03 01:59:56 +01:00
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int result;
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|
cthread_exit( &result );
|
2000-03-04 23:33:01 +01:00
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2000-03-11 01:05:16 +01:00
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|
#elif defined(HAVE_KERNEL_SCHEDULER_H) && defined(HAVE_KERNEL_OS_H)
|
2000-03-04 23:33:01 +01:00
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exit_thread( 0 );
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|
2000-03-03 01:59:56 +01:00
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#endif
|
1999-12-08 16:22:59 +01:00
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}
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|
2000-02-13 05:31:35 +01:00
|
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|
/*****************************************************************************
|
2000-01-11 00:36:06 +01:00
|
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|
* vlc_thread_join: wait until a thread exits
|
2000-02-13 05:31:35 +01:00
|
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*****************************************************************************/
|
1999-12-08 16:22:59 +01:00
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static __inline__ void vlc_thread_join( vlc_thread_t thread )
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{
|
2001-01-07 04:56:40 +01:00
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|
#if defined(HAVE_PTHREAD_H)
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pthread_join( thread, NULL );
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#elif defined(HAVE_CTHREADS_H)
|
2000-03-03 01:59:56 +01:00
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cthread_join( thread );
|
2000-03-04 23:33:01 +01:00
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2000-03-11 01:05:16 +01:00
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|
#elif defined(HAVE_KERNEL_SCHEDULER_H) && defined(HAVE_KERNEL_OS_H)
|
2000-04-14 06:19:51 +02:00
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int32 exit_value;
|
2000-03-04 23:33:01 +01:00
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wait_for_thread( thread, &exit_value );
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2000-03-03 01:59:56 +01:00
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#endif
|
1999-12-08 16:22:59 +01:00
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}
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|
2000-02-13 05:31:35 +01:00
|
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|
/*****************************************************************************
|
2000-01-11 00:36:06 +01:00
|
|
|
* vlc_mutex_init: initialize a mutex
|
2000-02-13 05:31:35 +01:00
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|
*****************************************************************************/
|
2000-01-11 00:36:06 +01:00
|
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static __inline__ int vlc_mutex_init( vlc_mutex_t *p_mutex )
|
1999-12-08 16:22:59 +01:00
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{
|
2001-01-07 04:56:40 +01:00
|
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|
#if defined(HAVE_PTHREAD_H)
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|
return pthread_mutex_init( p_mutex, NULL );
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|
#elif defined(HAVE_CTHREADS_H)
|
2000-03-03 01:59:56 +01:00
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mutex_init( p_mutex );
|
2000-04-14 06:19:51 +02:00
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|
return 0;
|
2000-03-04 23:33:01 +01:00
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|
2000-03-11 01:05:16 +01:00
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|
#elif defined(HAVE_KERNEL_SCHEDULER_H) && defined(HAVE_KERNEL_OS_H)
|
2000-08-21 21:57:55 +02:00
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|
2001-01-05 15:45:47 +01:00
|
|
|
/* check the arguments and whether it's already been initialized */
|
2000-08-21 21:57:55 +02:00
|
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|
if( p_mutex == NULL ) return B_BAD_VALUE;
|
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|
|
if( p_mutex->init == 9999 )
|
|
|
|
{
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|
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|
return EALREADY;
|
|
|
|
}
|
2000-03-04 23:33:01 +01:00
|
|
|
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|
|
p_mutex->lock = create_sem( 1, "BeMutex" );
|
2000-08-21 21:57:55 +02:00
|
|
|
if( p_mutex->lock < B_NO_ERROR )
|
|
|
|
return( -1 );
|
2000-03-04 23:33:01 +01:00
|
|
|
p_mutex->init = 9999;
|
|
|
|
return B_OK;
|
|
|
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|
2000-03-03 01:59:56 +01:00
|
|
|
#endif
|
1999-12-08 16:22:59 +01:00
|
|
|
}
|
|
|
|
|
2000-02-13 05:31:35 +01:00
|
|
|
/*****************************************************************************
|
2000-01-11 00:36:06 +01:00
|
|
|
* vlc_mutex_lock: lock a mutex
|
2000-02-13 05:31:35 +01:00
|
|
|
*****************************************************************************/
|
2000-01-11 00:36:06 +01:00
|
|
|
static __inline__ int vlc_mutex_lock( vlc_mutex_t *p_mutex )
|
1999-12-08 16:22:59 +01:00
|
|
|
{
|
2001-01-07 04:56:40 +01:00
|
|
|
#if defined(HAVE_PTHREAD_H)
|
|
|
|
return pthread_mutex_lock( p_mutex );
|
|
|
|
|
|
|
|
#elif defined(HAVE_CTHREADS_H)
|
2000-03-03 01:59:56 +01:00
|
|
|
mutex_lock( p_mutex );
|
2000-04-14 06:19:51 +02:00
|
|
|
return 0;
|
2000-03-04 23:33:01 +01:00
|
|
|
|
2000-03-11 01:05:16 +01:00
|
|
|
#elif defined(HAVE_KERNEL_SCHEDULER_H) && defined(HAVE_KERNEL_OS_H)
|
2000-03-04 23:33:01 +01:00
|
|
|
status_t err;
|
2000-08-21 21:57:55 +02:00
|
|
|
|
2000-04-20 00:13:38 +02:00
|
|
|
if( !p_mutex ) return B_BAD_VALUE;
|
|
|
|
if( p_mutex->init < 2000 ) return B_NO_INIT;
|
2000-04-14 06:19:51 +02:00
|
|
|
|
2000-03-04 23:33:01 +01:00
|
|
|
err = acquire_sem( p_mutex->lock );
|
|
|
|
return err;
|
|
|
|
|
2000-03-03 01:59:56 +01:00
|
|
|
#endif
|
1999-12-08 16:22:59 +01:00
|
|
|
}
|
|
|
|
|
2000-02-13 05:31:35 +01:00
|
|
|
/*****************************************************************************
|
2000-01-11 00:36:06 +01:00
|
|
|
* vlc_mutex_unlock: unlock a mutex
|
2000-02-13 05:31:35 +01:00
|
|
|
*****************************************************************************/
|
2000-01-11 00:36:06 +01:00
|
|
|
static __inline__ int vlc_mutex_unlock( vlc_mutex_t *p_mutex )
|
1999-12-08 16:22:59 +01:00
|
|
|
{
|
2001-01-07 04:56:40 +01:00
|
|
|
#if defined(HAVE_PTHREAD_H)
|
|
|
|
return pthread_mutex_unlock( p_mutex );
|
|
|
|
|
|
|
|
#elif defined(HAVE_CTHREADS_H)
|
2000-03-03 01:59:56 +01:00
|
|
|
mutex_unlock( p_mutex );
|
2000-04-14 06:19:51 +02:00
|
|
|
return 0;
|
2000-03-04 23:33:01 +01:00
|
|
|
|
2000-03-11 01:05:16 +01:00
|
|
|
#elif defined(HAVE_KERNEL_SCHEDULER_H) && defined(HAVE_KERNEL_OS_H)
|
2000-08-21 21:57:55 +02:00
|
|
|
|
2000-04-20 00:13:38 +02:00
|
|
|
if(! p_mutex) return B_BAD_VALUE;
|
|
|
|
if( p_mutex->init < 2000 ) return B_NO_INIT;
|
2000-04-14 06:19:51 +02:00
|
|
|
|
2000-03-04 23:33:01 +01:00
|
|
|
release_sem( p_mutex->lock );
|
|
|
|
return B_OK;
|
|
|
|
|
2000-03-03 01:59:56 +01:00
|
|
|
#endif
|
1999-12-08 16:22:59 +01:00
|
|
|
}
|
|
|
|
|
2001-01-07 04:56:40 +01:00
|
|
|
/*****************************************************************************
|
2001-01-07 05:31:18 +01:00
|
|
|
* vlc_mutex_destroy: destroy a mutex
|
2001-01-07 04:56:40 +01:00
|
|
|
*****************************************************************************/
|
|
|
|
static __inline__ int vlc_mutex_destroy( vlc_mutex_t *p_mutex )
|
|
|
|
{
|
|
|
|
#if defined(HAVE_PTHREAD_H)
|
|
|
|
return pthread_mutex_destroy( p_mutex );
|
2001-02-18 04:32:02 +01:00
|
|
|
#elif defined(HAVE_KERNEL_SCHEDULER_H) && defined(HAVE_KERNEL_OS_H)
|
2001-02-20 18:08:02 +01:00
|
|
|
if( p_mutex->init == 9999 )
|
|
|
|
delete_sem( p_mutex->lock );
|
|
|
|
p_mutex->init = 0;
|
|
|
|
return B_OK;
|
2001-01-07 04:56:40 +01:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2000-02-13 05:31:35 +01:00
|
|
|
/*****************************************************************************
|
2000-01-11 00:36:06 +01:00
|
|
|
* vlc_cond_init: initialize a condition
|
2000-02-13 05:31:35 +01:00
|
|
|
*****************************************************************************/
|
2000-01-11 00:36:06 +01:00
|
|
|
static __inline__ int vlc_cond_init( vlc_cond_t *p_condvar )
|
1999-12-08 16:22:59 +01:00
|
|
|
{
|
2001-01-07 04:56:40 +01:00
|
|
|
#if defined(HAVE_PTHREAD_H)
|
|
|
|
return pthread_cond_init( p_condvar, NULL );
|
|
|
|
|
|
|
|
#elif defined(HAVE_CTHREADS_H)
|
2000-03-03 01:59:56 +01:00
|
|
|
/* condition_init() */
|
|
|
|
spin_lock_init( &p_condvar->lock );
|
|
|
|
cthread_queue_init( &p_condvar->queue );
|
|
|
|
p_condvar->name = 0;
|
|
|
|
p_condvar->implications = 0;
|
|
|
|
|
2000-04-14 06:19:51 +02:00
|
|
|
return 0;
|
2000-03-04 23:33:01 +01:00
|
|
|
|
2000-03-11 01:05:16 +01:00
|
|
|
#elif defined(HAVE_KERNEL_SCHEDULER_H) && defined(HAVE_KERNEL_OS_H)
|
2000-04-14 06:19:51 +02:00
|
|
|
if( !p_condvar )
|
|
|
|
return B_BAD_VALUE;
|
|
|
|
|
|
|
|
if( p_condvar->init == 9999 )
|
|
|
|
return EALREADY;
|
2000-03-04 23:33:01 +01:00
|
|
|
|
2000-08-21 21:57:55 +02:00
|
|
|
p_condvar->thread = -1;
|
2000-03-04 23:33:01 +01:00
|
|
|
p_condvar->init = 9999;
|
2000-08-21 21:57:55 +02:00
|
|
|
return 0;
|
2000-03-04 23:33:01 +01:00
|
|
|
|
2000-03-03 01:59:56 +01:00
|
|
|
#endif
|
1999-12-08 16:22:59 +01:00
|
|
|
}
|
|
|
|
|
2000-02-13 05:31:35 +01:00
|
|
|
/*****************************************************************************
|
2000-01-11 00:36:06 +01:00
|
|
|
* vlc_cond_signal: start a thread on condition completion
|
2000-02-13 05:31:35 +01:00
|
|
|
*****************************************************************************/
|
2000-01-11 00:36:06 +01:00
|
|
|
static __inline__ int vlc_cond_signal( vlc_cond_t *p_condvar )
|
1999-12-08 16:22:59 +01:00
|
|
|
{
|
2001-01-07 04:56:40 +01:00
|
|
|
#if defined(HAVE_PTHREAD_H)
|
|
|
|
return pthread_cond_signal( p_condvar );
|
|
|
|
|
|
|
|
#elif defined(HAVE_CTHREADS_H)
|
2000-03-03 01:59:56 +01:00
|
|
|
/* condition_signal() */
|
|
|
|
if ( p_condvar->queue.head || p_condvar->implications )
|
|
|
|
{
|
|
|
|
cond_signal( (condition_t)p_condvar );
|
|
|
|
}
|
2000-04-14 06:19:51 +02:00
|
|
|
return 0;
|
2000-03-04 23:33:01 +01:00
|
|
|
|
2000-03-11 01:05:16 +01:00
|
|
|
#elif defined(HAVE_KERNEL_SCHEDULER_H) && defined(HAVE_KERNEL_OS_H)
|
2000-04-14 06:19:51 +02:00
|
|
|
if( !p_condvar )
|
|
|
|
return B_BAD_VALUE;
|
|
|
|
|
|
|
|
if( p_condvar->init < 2000 )
|
|
|
|
return B_NO_INIT;
|
2000-08-21 21:57:55 +02:00
|
|
|
while( p_condvar->thread != -1 )
|
2000-03-04 23:33:01 +01:00
|
|
|
{
|
2000-08-21 21:57:55 +02:00
|
|
|
thread_info info;
|
|
|
|
if( get_thread_info(p_condvar->thread, &info) == B_BAD_VALUE )
|
|
|
|
return 0;
|
2000-04-14 06:19:51 +02:00
|
|
|
|
2000-08-21 21:57:55 +02:00
|
|
|
if( info.state != B_THREAD_SUSPENDED )
|
2000-04-14 06:19:51 +02:00
|
|
|
{
|
2001-02-20 18:08:02 +01:00
|
|
|
// The waiting thread is not suspended so it could
|
|
|
|
// have been interrupted beetwen the unlock and the
|
|
|
|
// suspend_thread line. That is why we sleep a little
|
|
|
|
// before retesting p_condver->thread.
|
2000-08-21 21:57:55 +02:00
|
|
|
snooze( 10000 );
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2001-02-20 18:08:02 +01:00
|
|
|
// Ok, we have to wake up that thread
|
2000-08-21 21:57:55 +02:00
|
|
|
resume_thread( p_condvar->thread );
|
|
|
|
return 0;
|
2000-04-14 06:19:51 +02:00
|
|
|
}
|
2000-03-04 23:33:01 +01:00
|
|
|
}
|
2000-08-21 21:57:55 +02:00
|
|
|
return 0;
|
2000-03-04 23:33:01 +01:00
|
|
|
|
2000-03-03 01:59:56 +01:00
|
|
|
#endif
|
1999-12-08 16:22:59 +01:00
|
|
|
}
|
2000-01-11 00:36:06 +01:00
|
|
|
|
2000-02-13 05:31:35 +01:00
|
|
|
/*****************************************************************************
|
2000-01-11 00:36:06 +01:00
|
|
|
* vlc_cond_wait: wait until condition completion
|
2000-02-13 05:31:35 +01:00
|
|
|
*****************************************************************************/
|
2000-01-11 00:36:06 +01:00
|
|
|
static __inline__ int vlc_cond_wait( vlc_cond_t *p_condvar, vlc_mutex_t *p_mutex )
|
1999-12-08 16:22:59 +01:00
|
|
|
{
|
2001-01-07 04:56:40 +01:00
|
|
|
#if defined(HAVE_PTHREAD_H)
|
|
|
|
return pthread_cond_wait( p_condvar, p_mutex );
|
|
|
|
|
|
|
|
#elif defined(HAVE_CTHREADS_H)
|
2000-03-03 01:59:56 +01:00
|
|
|
condition_wait( (condition_t)p_condvar, (mutex_t)p_mutex );
|
2000-04-14 06:19:51 +02:00
|
|
|
return 0;
|
2000-03-04 23:33:01 +01:00
|
|
|
|
2000-03-11 01:05:16 +01:00
|
|
|
#elif defined(HAVE_KERNEL_SCHEDULER_H) && defined(HAVE_KERNEL_OS_H)
|
2000-04-14 06:19:51 +02:00
|
|
|
if( !p_condvar )
|
|
|
|
return B_BAD_VALUE;
|
|
|
|
|
|
|
|
if( !p_mutex )
|
|
|
|
return B_BAD_VALUE;
|
|
|
|
|
|
|
|
if( p_condvar->init < 2000 )
|
|
|
|
return B_NO_INIT;
|
|
|
|
|
2001-02-20 18:08:02 +01:00
|
|
|
// The p_condvar->thread var is initialized before the unlock because
|
|
|
|
// it enables to identify when the thread is interrupted beetwen the
|
|
|
|
// unlock line and the suspend_thread line
|
2000-08-21 21:57:55 +02:00
|
|
|
p_condvar->thread = find_thread( NULL );
|
2000-03-04 23:33:01 +01:00
|
|
|
vlc_mutex_unlock( p_mutex );
|
2000-08-21 21:57:55 +02:00
|
|
|
suspend_thread( p_condvar->thread );
|
|
|
|
p_condvar->thread = -1;
|
2000-04-14 06:19:51 +02:00
|
|
|
|
2000-08-21 21:57:55 +02:00
|
|
|
vlc_mutex_lock( p_mutex );
|
|
|
|
return 0;
|
2000-03-04 23:33:01 +01:00
|
|
|
|
2000-03-03 01:59:56 +01:00
|
|
|
#endif
|
1999-12-08 16:22:59 +01:00
|
|
|
}
|
2000-08-15 19:40:40 +02:00
|
|
|
|
2001-01-07 04:56:40 +01:00
|
|
|
/*****************************************************************************
|
2001-01-07 05:31:18 +01:00
|
|
|
* vlc_cond_destroy: destroy a condition
|
2001-01-07 04:56:40 +01:00
|
|
|
*****************************************************************************/
|
|
|
|
static __inline__ int vlc_cond_destroy( vlc_cond_t *p_condvar )
|
|
|
|
{
|
|
|
|
#if defined(HAVE_PTHREAD_H)
|
|
|
|
return pthread_cond_destroy( p_condvar );
|
2001-02-18 04:32:02 +01:00
|
|
|
#elif defined(HAVE_KERNEL_SCHEDULER_H) && defined(HAVE_KERNEL_OS_H)
|
2001-02-20 18:08:02 +01:00
|
|
|
p_condvar->init = 0;
|
2001-02-18 04:32:02 +01:00
|
|
|
return 0;
|
2001-01-07 04:56:40 +01:00
|
|
|
#endif
|
|
|
|
}
|