2000-02-13 05:31:35 +01:00
|
|
|
/*****************************************************************************
|
2000-03-09 13:30:15 +01:00
|
|
|
* threads.h : threads implementation for the VideoLAN client
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|
|
|
* This header provides a portable threads implementation.
|
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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*
|
2000-03-09 13:30:15 +01:00
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|
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* Authors: Jean-Marc Dressler <polux@via.ecp.fr>
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* Samuel Hocevar <sam@via.ecp.fr>
|
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.
|
2000-05-25 00:39:44 +02:00
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|
*
|
2000-03-03 08:03:34 +01:00
|
|
|
* This program is distributed in the hope that it will be useful,
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|
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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.
|
2000-03-03 08:03:34 +01:00
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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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|
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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.
|
2000-02-13 05:31:35 +01:00
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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
|
|
|
#elif defined(HAVE_CTHREADS_H) /* GNUMach */
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2000-03-03 01:59:56 +01:00
|
|
|
#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 */
|
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 !
|
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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|
2000-02-13 05:31:35 +01:00
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|
|
/*****************************************************************************
|
2000-01-11 00:36:06 +01:00
|
|
|
* Constants
|
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
|
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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|
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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 */
|
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 */
|
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 */
|
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 */
|
2000-01-11 00:36:06 +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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|
|
* Types definition
|
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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2000-03-09 13:30:15 +01:00
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|
#if defined(HAVE_CTHREADS_H)
|
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
|
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*) */
|
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)
|
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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|
|
thread_id owner;
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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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|
|
sem_id sem;
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|
|
|
sem_id handshakeSem;
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|
|
sem_id signalSem;
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|
|
volatile int32 nw;
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|
|
volatile int32 ns;
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|
|
} vlc_cond_t;
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|
2000-03-09 13:30:15 +01:00
|
|
|
#elif defined(HAVE_PTHREAD_H)
|
2000-03-03 01:59:56 +01:00
|
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|
|
1999-12-08 16:22:59 +01:00
|
|
|
typedef pthread_t vlc_thread_t;
|
|
|
|
typedef pthread_mutex_t vlc_mutex_t;
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|
|
|
typedef pthread_cond_t vlc_cond_t;
|
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|
2000-03-09 13:30:15 +01:00
|
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|
#endif
|
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);
|
1999-12-08 16:22:59 +01:00
|
|
|
|
2000-02-13 05:31:35 +01:00
|
|
|
/*****************************************************************************
|
1999-12-08 16:22:59 +01:00
|
|
|
* Prototypes
|
2000-02-13 05:31:35 +01:00
|
|
|
*****************************************************************************/
|
1999-12-08 16:22:59 +01:00
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|
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|
2000-01-11 00:36:06 +01:00
|
|
|
static __inline__ int vlc_thread_create( vlc_thread_t *p_thread, char *psz_name,
|
2000-02-14 09:44:59 +01:00
|
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|
vlc_thread_func_t func, void *p_data );
|
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 );
|
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_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 );
|
1999-12-08 16:22:59 +01:00
|
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|
2000-01-11 00:36:06 +01:00
|
|
|
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 );
|
1999-12-08 16:22:59 +01:00
|
|
|
|
2000-02-23 04:04:50 +01:00
|
|
|
#if 0
|
|
|
|
static _inline__ int vlc_cond_timedwait ( vlc_cond_t * condvar, vlc_mutex_t * mutex,
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|
|
|
mtime_t absoute_timeout_time );
|
|
|
|
#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_thread_create: create a thread
|
2000-02-13 05:31:35 +01:00
|
|
|
*****************************************************************************/
|
2000-01-11 00:36:06 +01:00
|
|
|
static __inline__ int vlc_thread_create( vlc_thread_t *p_thread,
|
2000-02-14 09:44:59 +01:00
|
|
|
char *psz_name, vlc_thread_func_t func,
|
|
|
|
void *p_data)
|
1999-12-08 16:22:59 +01:00
|
|
|
{
|
2000-03-09 13:30:15 +01:00
|
|
|
#if defined(HAVE_CTHREADS_H)
|
2000-03-03 01:59:56 +01:00
|
|
|
*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;
|
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
|
|
|
*p_thread = spawn_thread( (thread_func)func, psz_name,
|
|
|
|
B_NORMAL_PRIORITY, p_data );
|
2000-03-04 23:33:01 +01:00
|
|
|
return resume_thread( *p_thread );
|
|
|
|
|
2000-03-09 13:30:15 +01:00
|
|
|
#elif defined(HAVE_PTHREAD_H)
|
2000-01-11 00:36:06 +01:00
|
|
|
return pthread_create( p_thread, NULL, func, p_data );
|
2000-03-09 13:30:15 +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_thread_exit: terminate a thread
|
2000-02-13 05:31:35 +01:00
|
|
|
*****************************************************************************/
|
2000-01-11 00:36:06 +01:00
|
|
|
static __inline__ void vlc_thread_exit( void )
|
1999-12-08 16:22:59 +01:00
|
|
|
{
|
2000-03-09 13:30:15 +01:00
|
|
|
#if defined(HAVE_CTHREADS_H)
|
2000-03-03 01:59:56 +01:00
|
|
|
int result;
|
|
|
|
cthread_exit( &result );
|
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
|
|
|
exit_thread( 0 );
|
|
|
|
|
2000-03-09 13:30:15 +01:00
|
|
|
#elif defined(HAVE_PTHREAD_H)
|
1999-12-08 16:22:59 +01:00
|
|
|
pthread_exit( 0 );
|
2000-03-09 13:30:15 +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_thread_join: wait until a thread exits
|
2000-02-13 05:31:35 +01:00
|
|
|
*****************************************************************************/
|
1999-12-08 16:22:59 +01:00
|
|
|
static __inline__ void vlc_thread_join( vlc_thread_t thread )
|
|
|
|
{
|
2000-03-09 13:30:15 +01:00
|
|
|
#if defined(HAVE_CTHREADS_H)
|
2000-03-03 01:59:56 +01:00
|
|
|
cthread_join( thread );
|
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
|
|
|
int32 exit_value;
|
2000-03-04 23:33:01 +01:00
|
|
|
wait_for_thread( thread, &exit_value );
|
|
|
|
|
2000-03-09 13:30:15 +01:00
|
|
|
#elif defined(HAVE_PTHREAD_H)
|
1999-12-08 16:22:59 +01:00
|
|
|
pthread_join( thread, NULL );
|
2000-03-09 13:30:15 +01:00
|
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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_init: initialize a mutex
|
2000-02-13 05:31:35 +01:00
|
|
|
*****************************************************************************/
|
2000-01-11 00:36:06 +01:00
|
|
|
static __inline__ int vlc_mutex_init( vlc_mutex_t *p_mutex )
|
1999-12-08 16:22:59 +01:00
|
|
|
{
|
2000-03-09 13:30:15 +01:00
|
|
|
#if defined(HAVE_CTHREADS_H)
|
2000-03-03 01:59:56 +01:00
|
|
|
mutex_init( 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)
|
2000-04-20 00:13:38 +02:00
|
|
|
/*
|
2000-03-04 23:33:01 +01:00
|
|
|
// check the arguments and whether it's already been initialized
|
2000-04-20 00:13:38 +02:00
|
|
|
if( !p_mutex ) return B_BAD_VALUE;
|
|
|
|
if( p_mutex->init == 9999 ) return EALREADY;
|
|
|
|
*/
|
2000-03-04 23:33:01 +01:00
|
|
|
|
|
|
|
p_mutex->lock = create_sem( 1, "BeMutex" );
|
|
|
|
p_mutex->owner = -1;
|
|
|
|
p_mutex->init = 9999;
|
|
|
|
return B_OK;
|
|
|
|
|
2000-03-09 13:30:15 +01:00
|
|
|
#elif defined(HAVE_PTHREAD_H)
|
2000-01-11 00:36:06 +01:00
|
|
|
return pthread_mutex_init( p_mutex, NULL );
|
2000-03-09 13:30:15 +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
|
|
|
#if defined(HAVE_KERNEL_SCHEDULER_H) && defined(HAVE_KERNEL_OS_H)
|
|
|
|
/* lazy_init_mutex */
|
|
|
|
static __inline__ void lazy_init_mutex(vlc_mutex_t* p_mutex)
|
|
|
|
{
|
|
|
|
int32 v = atomic_or( &p_mutex->init, 1 );
|
|
|
|
if( 2000 == v ) /* we're the first, so do the init */
|
|
|
|
{
|
|
|
|
vlc_mutex_init( p_mutex );
|
|
|
|
}
|
|
|
|
else /* we're not the first, so wait until the init is finished */
|
|
|
|
{
|
|
|
|
while( p_mutex->init != 9999 )
|
|
|
|
{
|
|
|
|
snooze( 10000 );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
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
|
|
|
{
|
2000-03-09 13:30:15 +01:00
|
|
|
#if 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;
|
2000-04-20 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
|
|
|
lazy_init_mutex( p_mutex );
|
2000-04-20 00:13:38 +02:00
|
|
|
*/
|
2000-03-04 23:33:01 +01:00
|
|
|
err = acquire_sem( p_mutex->lock );
|
2000-04-20 00:13:38 +02:00
|
|
|
/*
|
|
|
|
if( !err ) p_mutex->owner = find_thread( NULL );
|
|
|
|
*/
|
2000-04-14 06:19:51 +02:00
|
|
|
|
2000-03-04 23:33:01 +01:00
|
|
|
return err;
|
|
|
|
|
2000-03-09 13:30:15 +01:00
|
|
|
#elif defined(HAVE_PTHREAD_H)
|
2000-01-11 00:36:06 +01:00
|
|
|
return pthread_mutex_lock( p_mutex );
|
2000-03-09 13:30:15 +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_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
|
|
|
{
|
2000-03-09 13:30:15 +01:00
|
|
|
#if 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)
|
2000-04-20 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
|
|
|
lazy_init_mutex( p_mutex );
|
|
|
|
|
2000-04-14 06:19:51 +02:00
|
|
|
if( p_mutex->owner != find_thread(NULL) )
|
|
|
|
return ENOLCK;
|
|
|
|
|
2000-03-04 23:33:01 +01:00
|
|
|
p_mutex->owner = -1;
|
2000-04-20 00:13:38 +02:00
|
|
|
*/
|
2000-03-04 23:33:01 +01:00
|
|
|
release_sem( p_mutex->lock );
|
|
|
|
return B_OK;
|
|
|
|
|
2000-03-09 13:30:15 +01:00
|
|
|
#elif defined(HAVE_PTHREAD_H)
|
2000-01-11 00:36:06 +01:00
|
|
|
return pthread_mutex_unlock( p_mutex );
|
2000-03-09 13:30:15 +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_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
|
|
|
{
|
2000-03-09 13:30:15 +01:00
|
|
|
#if 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
|
|
|
|
|
|
|
p_condvar->sem = create_sem( 0, "CVSem" );
|
|
|
|
p_condvar->handshakeSem = create_sem( 0, "CVHandshake" );
|
|
|
|
p_condvar->signalSem = create_sem( 1, "CVSignal" );
|
|
|
|
p_condvar->ns = p_condvar->nw = 0;
|
|
|
|
p_condvar->init = 9999;
|
|
|
|
return B_OK;
|
|
|
|
|
2000-03-09 13:30:15 +01:00
|
|
|
#elif defined(HAVE_PTHREAD_H)
|
2000-01-11 00:36:06 +01:00
|
|
|
return pthread_cond_init( p_condvar, NULL );
|
2000-03-09 13:30:15 +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
|
|
|
|
|
|
|
#if defined(HAVE_KERNEL_SCHEDULER_H) && defined(HAVE_KERNEL_OS_H)
|
|
|
|
/* lazy_init_cond */
|
|
|
|
static __inline__ void lazy_init_cond( vlc_cond_t* p_condvar )
|
|
|
|
{
|
|
|
|
int32 v = atomic_or( &p_condvar->init, 1 );
|
|
|
|
if( 2000 == v ) /* we're the first, so do the init */
|
|
|
|
{
|
|
|
|
vlc_cond_init( p_condvar );
|
|
|
|
}
|
|
|
|
else /* we're not the first, so wait until the init is finished */
|
|
|
|
{
|
|
|
|
while( p_condvar->init != 9999 )
|
|
|
|
{
|
|
|
|
snooze( 10000 );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
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
|
|
|
{
|
2000-03-09 13:30:15 +01:00
|
|
|
#if 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)
|
2000-03-04 23:33:01 +01:00
|
|
|
status_t err = B_OK;
|
|
|
|
|
2000-04-14 06:19:51 +02:00
|
|
|
if( !p_condvar )
|
|
|
|
return B_BAD_VALUE;
|
|
|
|
|
|
|
|
if( p_condvar->init < 2000 )
|
|
|
|
return B_NO_INIT;
|
|
|
|
|
2000-03-04 23:33:01 +01:00
|
|
|
lazy_init_cond( p_condvar );
|
|
|
|
|
2000-04-14 06:19:51 +02:00
|
|
|
if( acquire_sem(p_condvar->signalSem) == B_INTERRUPTED)
|
|
|
|
return B_INTERRUPTED;
|
2000-03-04 23:33:01 +01:00
|
|
|
|
|
|
|
if( p_condvar->nw > p_condvar->ns )
|
|
|
|
{
|
|
|
|
p_condvar->ns += 1;
|
|
|
|
release_sem( p_condvar->sem );
|
|
|
|
release_sem( p_condvar->signalSem );
|
2000-04-14 06:19:51 +02:00
|
|
|
|
2000-03-04 23:33:01 +01:00
|
|
|
while( acquire_sem(p_condvar->handshakeSem) == B_INTERRUPTED )
|
2000-04-14 06:19:51 +02:00
|
|
|
{
|
|
|
|
err = B_INTERRUPTED;
|
|
|
|
}
|
2000-03-04 23:33:01 +01:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
release_sem( p_condvar->signalSem );
|
|
|
|
}
|
|
|
|
return err;
|
|
|
|
|
2000-03-09 13:30:15 +01:00
|
|
|
#elif defined(HAVE_PTHREAD_H)
|
2000-01-11 00:36:06 +01:00
|
|
|
return pthread_cond_signal( p_condvar );
|
2000-03-09 13:30:15 +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
|
|
|
{
|
2000-03-09 13:30:15 +01:00
|
|
|
#if 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)
|
2000-03-04 23:33:01 +01:00
|
|
|
status_t err;
|
|
|
|
|
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;
|
|
|
|
|
2000-03-04 23:33:01 +01:00
|
|
|
lazy_init_cond( p_condvar );
|
|
|
|
|
2000-04-14 06:19:51 +02:00
|
|
|
if( acquire_sem(p_condvar->signalSem) == B_INTERRUPTED )
|
|
|
|
return B_INTERRUPTED;
|
|
|
|
|
2000-03-04 23:33:01 +01:00
|
|
|
p_condvar->nw += 1;
|
|
|
|
release_sem( p_condvar->signalSem );
|
|
|
|
|
|
|
|
vlc_mutex_unlock( p_mutex );
|
|
|
|
err = acquire_sem( p_condvar->sem );
|
|
|
|
|
|
|
|
while( acquire_sem(p_condvar->signalSem) == B_INTERRUPTED)
|
2000-04-14 06:19:51 +02:00
|
|
|
{
|
|
|
|
err = B_INTERRUPTED;
|
|
|
|
}
|
|
|
|
|
2000-03-04 23:33:01 +01:00
|
|
|
if( p_condvar->ns > 0 )
|
|
|
|
{
|
|
|
|
release_sem( p_condvar->handshakeSem );
|
|
|
|
p_condvar->ns -= 1;
|
|
|
|
}
|
|
|
|
p_condvar->nw -= 1;
|
|
|
|
release_sem( p_condvar->signalSem );
|
|
|
|
|
|
|
|
while( vlc_mutex_lock(p_mutex) == B_INTERRUPTED)
|
2000-04-14 06:19:51 +02:00
|
|
|
{
|
|
|
|
err = B_INTERRUPTED;
|
|
|
|
}
|
2000-03-04 23:33:01 +01:00
|
|
|
return err;
|
|
|
|
|
2000-03-09 13:30:15 +01:00
|
|
|
#elif defined(HAVE_PTHREAD_H)
|
2000-01-11 00:36:06 +01:00
|
|
|
return pthread_cond_wait( p_condvar, p_mutex );
|
2000-03-09 13:30:15 +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
|
|
|
|