* vlc_threads_funcs.h : threads implementation for the VideoLAN client
* This header provides a portable threads implementation.
*****************************************************************************
- * Copyright (C) 1999, 2002 VideoLAN
- * $Id: vlc_threads_funcs.h,v 1.13 2003/01/22 15:16:02 massiot Exp $
+ * Copyright (C) 1999, 2002 the VideoLAN team
+ * $Id$
*
* Authors: Jean-Marc Dressler <polux@via.ecp.fr>
* Samuel Hocevar <sam@via.ecp.fr>
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
+#if !defined( __LIBVLC__ )
+ #error You are not libvlc or one of its plugins. You cannot include this file
+#endif
+
+#ifndef _VLC_THREADFUNCS_H_
+#define _VLC_THREADFUNCS_H_
+
/*****************************************************************************
* Function definitions
*****************************************************************************/
VLC_EXPORT( int, __vlc_threads_init, ( vlc_object_t * ) );
VLC_EXPORT( int, __vlc_threads_end, ( vlc_object_t * ) );
VLC_EXPORT( int, __vlc_mutex_init, ( vlc_object_t *, vlc_mutex_t * ) );
-VLC_EXPORT( int, __vlc_mutex_destroy, ( char *, int, vlc_mutex_t * ) );
+VLC_EXPORT( int, __vlc_mutex_destroy, ( const char *, int, vlc_mutex_t * ) );
VLC_EXPORT( int, __vlc_cond_init, ( vlc_object_t *, vlc_cond_t * ) );
-VLC_EXPORT( int, __vlc_cond_destroy, ( char *, int, vlc_cond_t * ) );
-VLC_EXPORT( int, __vlc_thread_create, ( vlc_object_t *, char *, int, char *, void * ( * ) ( void * ), int, vlc_bool_t ) );
-VLC_EXPORT( int, __vlc_thread_set_priority, ( vlc_object_t *, char *, int, int ) );
+VLC_EXPORT( int, __vlc_cond_destroy, ( const char *, int, vlc_cond_t * ) );
+VLC_EXPORT( int, __vlc_threadvar_create, (vlc_object_t *, vlc_threadvar_t * ) );
+VLC_EXPORT( int, __vlc_thread_create, ( vlc_object_t *, const char *, int, const char *, void * ( * ) ( void * ), int, vlc_bool_t ) );
+VLC_EXPORT( int, __vlc_thread_set_priority, ( vlc_object_t *, const char *, int, int ) );
VLC_EXPORT( void, __vlc_thread_ready, ( vlc_object_t * ) );
-VLC_EXPORT( void, __vlc_thread_join, ( vlc_object_t *, char *, int ) );
+VLC_EXPORT( void, __vlc_thread_join, ( vlc_object_t *, const char *, int ) );
/*****************************************************************************
#define vlc_mutex_lock( P_MUTEX ) \
__vlc_mutex_lock( __FILE__, __LINE__, P_MUTEX )
-static inline int __vlc_mutex_lock( char * psz_file, int i_line,
+#ifdef __APPLE__
+# define CAST_PTHREAD_TO_INT(t) (unsigned long int)(uintptr_t)(void *)t
+#else
+# define CAST_PTHREAD_TO_INT(t) (unsigned long int)t
+#endif
+
+static inline int __vlc_mutex_lock( const char * psz_file, int i_line,
vlc_mutex_t * p_mutex )
{
int i_result;
/* In case of error : */
- int i_thread = -1;
+ unsigned long int i_thread = 0;
const char * psz_error = "";
#if defined( PTH_INIT_IN_PTH_H )
- i_result = pth_mutex_acquire( &p_mutex->mutex, TRUE, NULL );
+ i_result = ( pth_mutex_acquire( &p_mutex->mutex, FALSE, NULL ) == FALSE );
#elif defined( ST_INIT_IN_ST_H )
i_result = st_mutex_lock( p_mutex->mutex );
}
i_result = 0;
-#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
- i_result = pthread_mutex_lock( &p_mutex->mutex );
- if ( i_result )
- {
- i_thread = (int)pthread_self();
- psz_error = strerror(i_result);
- }
-
-#elif defined( HAVE_CTHREADS_H )
- mutex_lock( p_mutex->mutex );
- i_result = 0;
-
#elif defined( HAVE_KERNEL_SCHEDULER_H )
if( p_mutex == NULL )
{
{
i_result = acquire_sem( p_mutex->lock );
}
+
+#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
+ i_result = pthread_mutex_lock( &p_mutex->mutex );
+ if ( i_result )
+ {
+ i_thread = CAST_PTHREAD_TO_INT(pthread_self());
+ psz_error = strerror(i_result);
+ }
+
+#elif defined( HAVE_CTHREADS_H )
+ mutex_lock( p_mutex->mutex );
+ i_result = 0;
+
#endif
if( i_result )
{
msg_Err( p_mutex->p_this,
- "thread %d: mutex_lock failed at %s:%d (%d:%s)",
+ "thread %li: mutex_lock failed at %s:%d (%d:%s)",
i_thread, psz_file, i_line, i_result, psz_error );
}
return i_result;
#define vlc_mutex_unlock( P_MUTEX ) \
__vlc_mutex_unlock( __FILE__, __LINE__, P_MUTEX )
-static inline int __vlc_mutex_unlock( char * psz_file, int i_line,
+static inline int __vlc_mutex_unlock( const char * psz_file, int i_line,
vlc_mutex_t *p_mutex )
{
int i_result;
/* In case of error : */
- int i_thread = -1;
+ unsigned long int i_thread = 0;
const char * psz_error = "";
#if defined( PTH_INIT_IN_PTH_H )
- i_result = pth_mutex_release( &p_mutex->mutex );
+ i_result = ( pth_mutex_release( &p_mutex->mutex ) == FALSE );
#elif defined( ST_INIT_IN_ST_H )
i_result = st_mutex_unlock( p_mutex->mutex );
}
i_result = 0;
-#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
- i_result = pthread_mutex_unlock( &p_mutex->mutex );
- if ( i_result )
- {
- i_thread = (int)pthread_self();
- psz_error = strerror(i_result);
- }
-
-#elif defined( HAVE_CTHREADS_H )
- mutex_unlock( p_mutex );
- i_result = 0;
-
#elif defined( HAVE_KERNEL_SCHEDULER_H )
if( p_mutex == NULL )
{
release_sem( p_mutex->lock );
return B_OK;
}
+
+#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
+ i_result = pthread_mutex_unlock( &p_mutex->mutex );
+ if ( i_result )
+ {
+ i_thread = CAST_PTHREAD_TO_INT(pthread_self());
+ psz_error = strerror(i_result);
+ }
+
+#elif defined( HAVE_CTHREADS_H )
+ mutex_unlock( p_mutex );
+ i_result = 0;
+
#endif
if( i_result )
{
msg_Err( p_mutex->p_this,
- "thread %d: mutex_unlock failed at %s:%d (%d:%s)",
+ "thread %li: mutex_unlock failed at %s:%d (%d:%s)",
i_thread, psz_file, i_line, i_result, psz_error );
}
#define vlc_cond_signal( P_COND ) \
__vlc_cond_signal( __FILE__, __LINE__, P_COND )
-static inline int __vlc_cond_signal( char * psz_file, int i_line,
+static inline int __vlc_cond_signal( const char * psz_file, int i_line,
vlc_cond_t *p_condvar )
{
int i_result;
/* In case of error : */
- int i_thread = -1;
+ unsigned long int i_thread = 0;
const char * psz_error = "";
#if defined( PTH_INIT_IN_PTH_H )
- i_result = pth_cond_notify( &p_condvar->cond, FALSE );
+ i_result = ( pth_cond_notify( &p_condvar->cond, FALSE ) == FALSE );
#elif defined( ST_INIT_IN_ST_H )
i_result = st_cond_signal( p_condvar->cond );
}
i_result = 0;
-#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
- i_result = pthread_cond_signal( &p_condvar->cond );
- if ( i_result )
- {
- i_thread = (int)pthread_self();
- psz_error = strerror(i_result);
- }
-
-#elif defined( HAVE_CTHREADS_H )
- /* condition_signal() */
- if ( p_condvar->queue.head || p_condvar->implications )
- {
- cond_signal( (condition_t)p_condvar );
- }
- i_result = 0;
-
#elif defined( HAVE_KERNEL_SCHEDULER_H )
if( p_condvar == NULL )
{
}
i_result = 0;
}
-#endif
-
- if( i_result )
- {
- msg_Err( p_condvar->p_this,
- "thread %d: cond_signal failed at %s:%d (%d:%s)",
- i_thread, psz_file, i_line, i_result, psz_error );
- }
-
- return i_result;
-}
-
-/*****************************************************************************
- * vlc_cond_broadcast: start all threads waiting on condition completion
- *****************************************************************************/
-/*
- * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME
- * Only works with pthreads, st, win32
- * You need to adapt it for others
- * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME
- */
-#define vlc_cond_broadcast( P_COND ) \
- __vlc_cond_broadcast( __FILE__, __LINE__, P_COND )
-
-static inline int __vlc_cond_broadcast( char * psz_file, int i_line,
- vlc_cond_t *p_condvar )
-{
- int i_result;
- /* In case of error : */
- int i_thread = -1;
- const char * psz_error = "";
-
-#if defined( PTH_INIT_IN_PTH_H )
- i_result = pth_cond_notify( &p_condvar->cond, FALSE );
-
-#elif defined( ST_INIT_IN_ST_H )
- i_result = st_cond_broadcast( p_condvar->cond );
-
-#elif defined( UNDER_CE )
- int i;
-
- /* Release all waiting threads. */
- for( i = p_condvar->i_waiting_threads; i > 0; i-- )
- {
- PulseEvent( p_condvar->event );
- }
- i_result = 0;
-
-#elif defined( WIN32 )
- int i;
-
- /* Release all waiting threads. */
- if( !p_condvar->semaphore )
- {
- for( i = p_condvar->i_waiting_threads; i > 0; i-- )
- {
- PulseEvent( p_condvar->event );
- }
- }
- else if( p_condvar->i_win9x_cv == 1 )
- {
- /* Wait for the gate to be open */
- WaitForSingleObject( p_condvar->event, INFINITE );
-
- if( p_condvar->i_waiting_threads )
- {
- /* Using a semaphore exposes us to a race condition. It is
- * possible for another thread to start waiting on the semaphore
- * just after we signaled it and thus steal the signal.
- * We have to prevent new threads from entering the cond_wait(). */
- ResetEvent( p_condvar->event );
-
- /* A semaphore is used here because Win9x doesn't have
- * SignalObjectAndWait() and thus a race condition exists
- * during the time we release the mutex and the time we start
- * waiting on the event (more precisely, the signal can sometimes
- * be missed by the waiting thread if we use PulseEvent()). */
- ReleaseSemaphore( p_condvar->semaphore,
- p_condvar->i_waiting_threads, 0 );
- }
- }
- else
- {
- if( p_condvar->i_waiting_threads )
- {
- ReleaseSemaphore( p_condvar->semaphore,
- p_condvar->i_waiting_threads, 0 );
-
- /* Wait for the last thread to be awakened */
- WaitForSingleObject( p_condvar->event, INFINITE );
- }
- }
- i_result = 0;
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
- i_result = pthread_cond_broadcast( &p_condvar->cond );
+ i_result = pthread_cond_signal( &p_condvar->cond );
if ( i_result )
{
- i_thread = (int)pthread_self();
+ i_thread = CAST_PTHREAD_TO_INT(pthread_self());
psz_error = strerror(i_result);
}
}
i_result = 0;
-#elif defined( HAVE_KERNEL_SCHEDULER_H )
- if( p_condvar == NULL )
- {
- i_result = B_BAD_VALUE;
- }
- else if( p_condvar->init < 2000 )
- {
- i_result = B_NO_INIT;
- }
- else
- {
- while( p_condvar->thread != -1 )
- {
- thread_info info;
- if( get_thread_info(p_condvar->thread, &info) == B_BAD_VALUE )
- {
- return 0;
- }
-
- if( info.state != B_THREAD_SUSPENDED )
- {
- /* 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. */
- snooze( 10000 );
- }
- else
- {
- /* Ok, we have to wake up that thread */
- resume_thread( p_condvar->thread );
- return 0;
- }
- }
- i_result = 0;
- }
#endif
if( i_result )
{
msg_Err( p_condvar->p_this,
- "thread %d: cond_broadcast failed at %s:%d (%d:%s)",
+ "thread %li: cond_signal failed at %s:%d (%d:%s)",
i_thread, psz_file, i_line, i_result, psz_error );
}
#define vlc_cond_wait( P_COND, P_MUTEX ) \
__vlc_cond_wait( __FILE__, __LINE__, P_COND, P_MUTEX )
-static inline int __vlc_cond_wait( char * psz_file, int i_line,
+static inline int __vlc_cond_wait( const char * psz_file, int i_line,
vlc_cond_t *p_condvar, vlc_mutex_t *p_mutex )
{
int i_result;
/* In case of error : */
- int i_thread = -1;
+ unsigned long int i_thread = 0;
const char * psz_error = "";
#if defined( PTH_INIT_IN_PTH_H )
- i_result = pth_cond_await( &p_condvar->cond, &p_mutex->mutex, NULL );
+ i_result = ( pth_cond_await( &p_condvar->cond, &p_mutex->mutex, NULL )
+ == FALSE );
#elif defined( ST_INIT_IN_ST_H )
st_mutex_unlock( p_mutex->mutex );
i_result = 0;
+#elif defined( HAVE_KERNEL_SCHEDULER_H )
+ if( p_condvar == NULL )
+ {
+ i_result = B_BAD_VALUE;
+ }
+ else if( p_mutex == NULL )
+ {
+ i_result = B_BAD_VALUE;
+ }
+ else if( p_condvar->init < 2000 )
+ {
+ i_result = B_NO_INIT;
+ }
+
+ /* 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 */
+ p_condvar->thread = find_thread( NULL );
+ vlc_mutex_unlock( p_mutex );
+ suspend_thread( p_condvar->thread );
+ p_condvar->thread = -1;
+
+ vlc_mutex_lock( p_mutex );
+ i_result = 0;
+
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
# ifdef DEBUG
if( i_result == ETIMEDOUT )
{
- /* People keep pissing me off with this. --Meuuh */
msg_Dbg( p_condvar->p_this,
- "thread %d: secret message triggered "
- "at %s:%d (%s)", (int)pthread_self(),
+ "thread %li: possible condition deadlock "
+ "at %s:%d (%s)", CAST_PTHREAD_TO_INT(pthread_self()),
psz_file, i_line, strerror(i_result) );
i_result = pthread_cond_wait( &p_condvar->cond, &p_mutex->mutex );
if ( i_result )
{
- i_thread = (int)pthread_self();
+ i_thread = CAST_PTHREAD_TO_INT(pthread_self());
psz_error = strerror(i_result);
}
condition_wait( (condition_t)p_condvar, (mutex_t)p_mutex );
i_result = 0;
-#elif defined( HAVE_KERNEL_SCHEDULER_H )
- if( p_condvar == NULL )
- {
- i_result = B_BAD_VALUE;
- }
- else if( p_mutex == NULL )
- {
- i_result = B_BAD_VALUE;
- }
- else if( p_condvar->init < 2000 )
- {
- i_result = B_NO_INIT;
- }
-
- /* 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 */
- p_condvar->thread = find_thread( NULL );
- vlc_mutex_unlock( p_mutex );
- suspend_thread( p_condvar->thread );
- p_condvar->thread = -1;
-
- vlc_mutex_lock( p_mutex );
- i_result = 0;
-
#endif
if( i_result )
{
msg_Err( p_condvar->p_this,
- "thread %d: cond_wait failed at %s:%d (%d:%s)",
+ "thread %li: cond_wait failed at %s:%d (%d:%s)",
i_thread, psz_file, i_line, i_result, psz_error );
}
#define vlc_cond_destroy( P_COND ) \
__vlc_cond_destroy( __FILE__, __LINE__, P_COND )
+/*****************************************************************************
+ * vlc_threadvar_create: create a thread-local variable
+ *****************************************************************************/
+#define vlc_threadvar_create( PTHIS, P_TLS ) \
+ __vlc_threadvar_create( PTHIS, P_TLS )
+
+/*****************************************************************************
+ * vlc_threadvar_set: create: set the value of a thread-local variable
+ *****************************************************************************/
+static inline int vlc_threadvar_set( vlc_threadvar_t * p_tls, void *p_value )
+{
+ int i_ret;
+
+#if defined( PTH_INIT_IN_PTH_H )
+ return pth_key_setdata( p_tls->handle, p_value );
+#elif defined( ST_INIT_IN_ST_H )
+ return st_thread_setspecific( p_tls->handle, p_value );
+#elif defined( HAVE_KERNEL_SCHEDULER_H )
+ return -1;
+
+#elif defined( UNDER_CE ) || defined( WIN32 )
+ i_ret = ( TlsSetValue( p_tls->handle, p_value ) != 0 );
+
+#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
+ i_ret = pthread_setspecific( p_tls->handle, p_value );
+
+#elif defined( HAVE_CTHREADS_H )
+ i_ret = cthread_setspecific( p_tls->handle, p_value );
+#endif
+
+ return i_ret;
+}
+
+/*****************************************************************************
+ * vlc_threadvar_get: create: get the value of a thread-local variable
+ *****************************************************************************/
+static inline void* vlc_threadvar_get( vlc_threadvar_t * p_tls )
+{
+ void* p_ret;
+
+#if defined( PTH_INIT_IN_PTH_H )
+ p_ret = pth_key_getdata( p_handle->key );
+#elif defined( ST_INIT_IN_ST_H )
+ p_ret = st_thread_getspecific( p_handle->key );
+#elif defined( HAVE_KERNEL_SCHEDULER_H )
+ p_ret = NULL;
+#elif defined( UNDER_CE ) || defined( WIN32 )
+ p_ret = TlsGetValue( p_tls->handle );
+
+#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
+ p_ret = pthread_getspecific( p_tls->handle );
+
+#elif defined( HAVE_CTHREADS_H )
+ if ( !cthread_getspecific( p_tls->handle, &p_ret ) )
+ {
+ p_ret = NULL;
+ }
+#endif
+
+ return p_ret;
+}
+
/*****************************************************************************
* vlc_thread_create: create a thread
*****************************************************************************/
*****************************************************************************/
#define vlc_thread_join( P_THIS ) \
__vlc_thread_join( VLC_OBJECT(P_THIS), __FILE__, __LINE__ )
+
+#endif
projects / vlc / blobdiff