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vlc/include/threads.h
Sam Hocevar e98aae28c0 * ./plugins/win32/intfwin.bpr: we now build intfwin.so at the right place. 
* ./plugins/win32/Makefile: intfwin.so can be built using commandline.
  * ./configure.in, ./include/threads.h, ./include/common.h: a custom defs.h
    file isn't needed for the intfwin plugin anymore.
  * ./INSTALL.win32: updated compilation instructions for the intfwin plugin.
2002-04-05 03:27:27 +00:00

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/*****************************************************************************
* threads.h : threads implementation for the VideoLAN client
* This header provides a portable threads implementation.
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
* $Id: threads.h,v 1.40 2002/04/05 03:27:27 sam Exp $
*
* Authors: Jean-Marc Dressler <polux@via.ecp.fr>
* Samuel Hocevar <sam@via.ecp.fr>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
*
* 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.
*****************************************************************************/
#include <stdio.h>
#if defined(GPROF) || defined(DEBUG)
# include <sys/time.h>
#endif
#if defined( PTH_INIT_IN_PTH_H ) /* GNU Pth */
# include <pth.h>
#elif defined( ST_INIT_IN_ST_H ) /* State threads */
# include <st.h>
#elif defined( WIN32 )
# include <process.h>
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) /* pthreads (like Linux & BSD) */
# include <pthread.h>
# ifdef DEBUG
/* Needed for pthread_cond_timedwait */
# include <errno.h>
# endif
/* This is not prototyped under Linux, though it exists. */
int pthread_mutexattr_setkind_np( pthread_mutexattr_t *attr, int kind );
#elif defined( HAVE_CTHREADS_H ) /* GNUMach */
# include <cthreads.h>
#elif defined( HAVE_KERNEL_SCHEDULER_H ) /* BeOS */
# include <kernel/OS.h>
# include <kernel/scheduler.h>
# include <byteorder.h>
#else
# error no threads available on your system !
#endif
/*****************************************************************************
* Constants
*****************************************************************************
* These constants are used by all threads in *_CreateThread() and
* *_DestroyThreads() functions. Since those calls are non-blocking, an integer
* value is used as a shared flag to represent the status of the thread.
*****************************************************************************/
/* Void status - this value can be used to make sure no operation is currently
* in progress on the concerned thread in an array of recorded threads */
#define THREAD_NOP 0 /* nothing happened */
/* Creation status */
#define THREAD_CREATE 10 /* thread is initializing */
#define THREAD_START 11 /* thread has forked */
#define THREAD_READY 19 /* thread is ready */
/* Destructions status */
#define THREAD_DESTROY 20 /* destruction order has been sent */
#define THREAD_END 21 /* destruction order has been received */
#define THREAD_OVER 29 /* thread does not exist any more */
/* Error status */
#define THREAD_ERROR 30 /* an error occured */
#define THREAD_FATAL 31 /* an fatal error occured - program must end */
/*****************************************************************************
* Types definition
*****************************************************************************/
#if defined( PTH_INIT_IN_PTH_H )
typedef pth_t vlc_thread_t;
typedef pth_mutex_t vlc_mutex_t;
typedef pth_cond_t vlc_cond_t;
#elif defined( ST_INIT_IN_ST_H )
typedef st_thread_t * vlc_thread_t;
typedef st_mutex_t * vlc_mutex_t;
typedef st_cond_t * vlc_cond_t;
#elif defined( WIN32 )
typedef HANDLE vlc_thread_t;
typedef struct
{
CRITICAL_SECTION csection;
HANDLE mutex;
} vlc_mutex_t;
typedef struct
{
int i_waiting_threads;
HANDLE signal;
} vlc_cond_t;
typedef unsigned (__stdcall *PTHREAD_START) (void *);
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
typedef pthread_t vlc_thread_t;
typedef pthread_mutex_t vlc_mutex_t;
typedef pthread_cond_t vlc_cond_t;
#elif defined( HAVE_CTHREADS_H )
typedef cthread_t vlc_thread_t;
/* Those structs are the ones defined in /include/cthreads.h but we need
* to handle (*foo) where foo is a (mutex_t) while they handle (foo) where
* foo is a (mutex_t*) */
typedef struct s_mutex {
spin_lock_t held;
spin_lock_t lock;
char *name;
struct cthread_queue queue;
} vlc_mutex_t;
typedef struct s_condition {
spin_lock_t lock;
struct cthread_queue queue;
char *name;
struct cond_imp *implications;
} vlc_cond_t;
#elif defined( HAVE_KERNEL_SCHEDULER_H )
/* This is the BeOS implementation of the vlc threads, note that the mutex is
* not a real mutex and the cond_var is not like a pthread cond_var but it is
* enough for what wee need */
typedef thread_id vlc_thread_t;
typedef struct
{
int32 init;
sem_id lock;
} vlc_mutex_t;
typedef struct
{
int32 init;
thread_id thread;
} vlc_cond_t;
#endif
typedef void *(*vlc_thread_func_t)(void *p_data);
/*****************************************************************************
* Prototypes
*****************************************************************************/
#ifdef GPROF
/* Wrapper function for profiling */
static void * vlc_thread_wrapper ( void *p_wrapper );
# ifdef WIN32
# define ITIMER_REAL 1
# define ITIMER_PROF 2
struct itimerval
{
struct timeval it_value;
struct timeval it_interval;
};
int setitimer(int kind, const struct itimerval* itnew, struct itimerval* itold);
# endif /* WIN32 */
typedef struct wrapper_s
{
/* Data lock access */
vlc_mutex_t lock;
vlc_cond_t wait;
/* Data used to spawn the real thread */
vlc_thread_func_t func;
void *p_data;
/* Profiling timer passed to the thread */
struct itimerval itimer;
} wrapper_t;
#endif /* GPROF */
/*****************************************************************************
* vlc_threads_init: initialize threads system
*****************************************************************************/
static __inline__ int vlc_threads_init( void )
{
#if defined( PTH_INIT_IN_PTH_H )
return pth_init();
#elif defined( ST_INIT_IN_ST_H )
return st_init();
#elif defined( WIN32 )
return 0;
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
return 0;
#elif defined( HAVE_CTHREADS_H )
return 0;
#elif defined( HAVE_KERNEL_SCHEDULER_H )
return 0;
#endif
}
/*****************************************************************************
* vlc_threads_end: stop threads system
*****************************************************************************/
static __inline__ int vlc_threads_end( void )
{
#if defined( PTH_INIT_IN_PTH_H )
return pth_kill();
#elif defined( ST_INIT_IN_ST_H )
return 0;
#elif defined( WIN32 )
return 0;
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
return 0;
#elif defined( HAVE_CTHREADS_H )
return 0;
#elif defined( HAVE_KERNEL_SCHEDULER_H )
return 0;
#endif
}
/*****************************************************************************
* vlc_mutex_init: initialize a mutex
*****************************************************************************/
static __inline__ int vlc_mutex_init( vlc_mutex_t *p_mutex )
{
#if defined( PTH_INIT_IN_PTH_H )
return pth_mutex_init( p_mutex );
#elif defined( ST_INIT_IN_ST_H )
*p_mutex = st_mutex_new();
return ( *p_mutex == NULL ) ? errno : 0;
#elif defined( WIN32 )
/* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
* function and have a 100% correct vlc_cond_wait() implementation.
* As this function is not available on Win9x, we can use the faster
* CriticalSections */
if( (GetVersion() < 0x80000000) && !p_main_sys->b_fast_pthread )
{
/* We are running on NT/2K/XP, we can use SignalObjectAndWait */
p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
return ( p_mutex->mutex ? 0 : 1 );
}
else
{
InitializeCriticalSection( &p_mutex->csection );
p_mutex->mutex = NULL;
return 0;
}
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
# if defined(DEBUG) && defined(SYS_LINUX)
/* Create error-checking mutex to detect threads problems more easily. */
pthread_mutexattr_t attr;
int i_result;
pthread_mutexattr_init( &attr );
pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
i_result = pthread_mutex_init( p_mutex, &attr );
pthread_mutexattr_destroy( &attr );
return( i_result );
# endif
return pthread_mutex_init( p_mutex, NULL );
#elif defined( HAVE_CTHREADS_H )
mutex_init( p_mutex );
return 0;
#elif defined( HAVE_KERNEL_SCHEDULER_H )
/* check the arguments and whether it's already been initialized */
if( p_mutex == NULL )
{
return B_BAD_VALUE;
}
if( p_mutex->init == 9999 )
{
return EALREADY;
}
p_mutex->lock = create_sem( 1, "BeMutex" );
if( p_mutex->lock < B_NO_ERROR )
{
return( -1 );
}
p_mutex->init = 9999;
return B_OK;
#endif
}
/*****************************************************************************
* vlc_mutex_lock: lock a mutex
*****************************************************************************/
#ifdef DEBUG
# define vlc_mutex_lock( P_MUTEX ) \
_vlc_mutex_lock( __FILE__, __LINE__, P_MUTEX )
#else
# define vlc_mutex_lock( P_MUTEX ) \
_vlc_mutex_lock( NULL, 0, P_MUTEX )
#endif
static __inline__ int _vlc_mutex_lock( char * psz_file, int i_line,
vlc_mutex_t *p_mutex )
{
#if defined( PTH_INIT_IN_PTH_H )
return pth_mutex_acquire( p_mutex, TRUE, NULL );
#elif defined( ST_INIT_IN_ST_H )
return st_mutex_lock( *p_mutex );
#elif defined( WIN32 )
if( p_mutex->mutex )
{
WaitForSingleObject( p_mutex->mutex, INFINITE );
}
else
{
EnterCriticalSection( &p_mutex->csection );
}
return 0;
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
int i_return = pthread_mutex_lock( p_mutex );
if( i_return )
{
intf_ErrMsg( "thread %d error: mutex_lock failed at %s:%d (%s)",
pthread_self(), psz_file, i_line, strerror(i_return) );
}
return i_return;
#elif defined( HAVE_CTHREADS_H )
mutex_lock( p_mutex );
return 0;
#elif defined( HAVE_KERNEL_SCHEDULER_H )
status_t err;
if( !p_mutex )
{
return B_BAD_VALUE;
}
if( p_mutex->init < 2000 )
{
return B_NO_INIT;
}
err = acquire_sem( p_mutex->lock );
return err;
#endif
}
/*****************************************************************************
* vlc_mutex_unlock: unlock a mutex
*****************************************************************************/
#ifdef DEBUG
# define vlc_mutex_unlock( P_MUTEX ) \
_vlc_mutex_unlock( __FILE__, __LINE__, P_MUTEX )
#else
# define vlc_mutex_unlock( P_MUTEX ) \
_vlc_mutex_unlock( NULL, 0, P_MUTEX )
#endif
static __inline__ int _vlc_mutex_unlock( char * psz_file, int i_line,
vlc_mutex_t *p_mutex )
{
#if defined( PTH_INIT_IN_PTH_H )
return pth_mutex_release( p_mutex );
#elif defined( ST_INIT_IN_ST_H )
return st_mutex_unlock( *p_mutex );
#elif defined( WIN32 )
if( p_mutex->mutex )
{
ReleaseMutex( p_mutex->mutex );
}
else
{
LeaveCriticalSection( &p_mutex->csection );
}
return 0;
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
int i_return = pthread_mutex_unlock( p_mutex );
if( i_return )
{
intf_ErrMsg( "thread %d error: mutex_unlock failed at %s:%d (%s)",
pthread_self(), psz_file, i_line, strerror(i_return) );
}
return i_return;
#elif defined( HAVE_CTHREADS_H )
mutex_unlock( p_mutex );
return 0;
#elif defined( HAVE_KERNEL_SCHEDULER_H )
if( !p_mutex)
{
return B_BAD_VALUE;
}
if( p_mutex->init < 2000 )
{
return B_NO_INIT;
}
release_sem( p_mutex->lock );
return B_OK;
#endif
}
/*****************************************************************************
* vlc_mutex_destroy: destroy a mutex
*****************************************************************************/
#ifdef DEBUG
# define vlc_mutex_destroy( P_MUTEX ) \
_vlc_mutex_destroy( __FILE__, __LINE__, P_MUTEX )
#else
# define vlc_mutex_destroy( P_MUTEX ) \
_vlc_mutex_destroy( NULL, 0, P_MUTEX )
#endif
static __inline__ int _vlc_mutex_destroy( char * psz_file, int i_line,
vlc_mutex_t *p_mutex )
{
#if defined( PTH_INIT_IN_PTH_H )
return 0;
#elif defined( ST_INIT_IN_ST_H )
return st_mutex_destroy( *p_mutex );
#elif defined( WIN32 )
if( p_mutex->mutex )
{
CloseHandle( p_mutex->mutex );
}
else
{
DeleteCriticalSection( &p_mutex->csection );
}
return 0;
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
int i_return = pthread_mutex_destroy( p_mutex );
if( i_return )
{
intf_ErrMsg( "thread %d error: mutex_destroy failed at %s:%d (%s)",
pthread_self(), psz_file, i_line, strerror(i_return) );
}
return i_return;
#elif defined( HAVE_CTHREADS_H )
return 0;
#elif defined( HAVE_KERNEL_SCHEDULER_H )
if( p_mutex->init == 9999 )
{
delete_sem( p_mutex->lock );
}
p_mutex->init = 0;
return B_OK;
#endif
}
/*****************************************************************************
* vlc_cond_init: initialize a condition
*****************************************************************************/
static __inline__ int vlc_cond_init( vlc_cond_t *p_condvar )
{
#if defined( PTH_INIT_IN_PTH_H )
return pth_cond_init( p_condvar );
#elif defined( ST_INIT_IN_ST_H )
*p_condvar = st_cond_new();
return ( *p_condvar == NULL ) ? errno : 0;
#elif defined( WIN32 )
/* initialise counter */
p_condvar->i_waiting_threads = 0;
/* Create an auto-reset event. */
p_condvar->signal = CreateEvent( NULL, /* no security */
FALSE, /* auto-reset event */
FALSE, /* non-signaled initially */
NULL ); /* unnamed */
return( !p_condvar->signal );
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
return pthread_cond_init( p_condvar, NULL );
#elif defined( HAVE_CTHREADS_H )
/* condition_init() */
spin_lock_init( &p_condvar->lock );
cthread_queue_init( &p_condvar->queue );
p_condvar->name = 0;
p_condvar->implications = 0;
return 0;
#elif defined( HAVE_KERNEL_SCHEDULER_H )
if( !p_condvar )
{
return B_BAD_VALUE;
}
if( p_condvar->init == 9999 )
{
return EALREADY;
}
p_condvar->thread = -1;
p_condvar->init = 9999;
return 0;
#endif
}
/*****************************************************************************
* vlc_cond_signal: start a thread on condition completion
*****************************************************************************/
static __inline__ int vlc_cond_signal( vlc_cond_t *p_condvar )
{
#if defined( PTH_INIT_IN_PTH_H )
return pth_cond_notify( p_condvar, FALSE );
#elif defined( ST_INIT_IN_ST_H )
return st_cond_signal( *p_condvar );
#elif defined( WIN32 )
/* Release one waiting thread if one is available. */
/* For this trick to work properly, the vlc_cond_signal must be surrounded
* by a mutex. This will prevent another thread from stealing the signal */
PulseEvent( p_condvar->signal );
return 0;
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
return pthread_cond_signal( p_condvar );
#elif defined( HAVE_CTHREADS_H )
/* condition_signal() */
if ( p_condvar->queue.head || p_condvar->implications )
{
cond_signal( (condition_t)p_condvar );
}
return 0;
#elif defined( HAVE_KERNEL_SCHEDULER_H )
if( !p_condvar )
{
return B_BAD_VALUE;
}
if( p_condvar->init < 2000 )
{
return B_NO_INIT;
}
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;
}
}
return 0;
#endif
}
/*****************************************************************************
* 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, you need to adapt it for others
* FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME
*/
static __inline__ int vlc_cond_broadcast( vlc_cond_t *p_condvar )
{
#if defined( PTH_INIT_IN_PTH_H )
return pth_cond_notify( p_condvar, FALSE );
#elif defined( ST_INIT_IN_ST_H )
return st_cond_broadcast( p_condvar );
#elif defined( WIN32 )
/* Release all waiting threads. */
/* For this trick to work properly, the vlc_cond_signal must be surrounded
* by a mutex. This will prevent another thread from stealing the signal */
while( p_condvar->i_waiting_threads )
{
PulseEvent( p_condvar->signal );
Sleep( 1 ); /* deschedule the current thread */
}
return 0;
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
return pthread_cond_broadcast( p_condvar );
#elif defined( HAVE_CTHREADS_H )
/* condition_signal() */
if ( p_condvar->queue.head || p_condvar->implications )
{
cond_signal( (condition_t)p_condvar );
}
return 0;
#elif defined( HAVE_KERNEL_SCHEDULER_H )
if( !p_condvar )
{
return B_BAD_VALUE;
}
if( p_condvar->init < 2000 )
{
return B_NO_INIT;
}
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;
}
}
return 0;
#endif
}
/*****************************************************************************
* vlc_cond_wait: wait until condition completion
*****************************************************************************/
#ifdef DEBUG
# define vlc_cond_wait( P_COND, P_MUTEX ) \
_vlc_cond_wait( __FILE__, __LINE__, P_COND, P_MUTEX )
#else
# define vlc_cond_wait( P_COND, P_MUTEX ) \
_vlc_cond_wait( NULL, 0, P_COND, P_MUTEX )
#endif
static __inline__ int _vlc_cond_wait( char * psz_file, int i_line,
vlc_cond_t *p_condvar,
vlc_mutex_t *p_mutex )
{
#if defined( PTH_INIT_IN_PTH_H )
return pth_cond_await( p_condvar, p_mutex, NULL );
#elif defined( ST_INIT_IN_ST_H )
int i_ret;
st_mutex_unlock( *p_mutex );
i_ret = st_cond_wait( *p_condvar );
st_mutex_lock( *p_mutex );
return i_ret;
#elif defined( WIN32 )
/* The ideal would be to use a function which atomically releases the
* mutex and initiate the waiting.
* Unfortunately only the SignalObjectAndWait function does this and it's
* only supported on WinNT/2K, furthermore it cannot take multiple
* events as parameters.
*
* The solution we use should however fulfill all our needs (even though
* it is not a correct pthreads implementation)
*/
int i_result;
p_condvar->i_waiting_threads ++;
if( p_mutex->mutex )
{
p_main_sys->SignalObjectAndWait( p_mutex->mutex, p_condvar->signal,
INFINITE, FALSE );
}
else
{
/* Release the mutex */
vlc_mutex_unlock( p_mutex );
i_result = WaitForSingleObject( p_condvar->signal, INFINITE);
p_condvar->i_waiting_threads --;
}
/* Reacquire the mutex before returning. */
vlc_mutex_lock( p_mutex );
return( i_result == WAIT_FAILED );
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
#ifndef DEBUG
return pthread_cond_wait( p_condvar, p_mutex );
#else
/* In debug mode, timeout */
struct timeval now;
struct timespec timeout;
int i_result;
for( ; ; )
{
gettimeofday( &now, NULL );
timeout.tv_sec = now.tv_sec + THREAD_COND_TIMEOUT;
timeout.tv_nsec = now.tv_usec * 1000;
i_result = pthread_cond_timedwait( p_condvar, p_mutex, &timeout );
if( i_result == ETIMEDOUT )
{
intf_WarnMsg( 1, "thread %d warning: Possible deadlock detected in cond_wait at %s:%d (%s)",
pthread_self(), psz_file, i_line, strerror(i_result) );
continue;
}
if( i_result )
{
intf_ErrMsg( "thread %d error: cond_wait failed at %s:%d (%s)",
pthread_self(), psz_file, i_line, strerror(i_result) );
}
return( i_result );
}
#endif
#elif defined( HAVE_CTHREADS_H )
condition_wait( (condition_t)p_condvar, (mutex_t)p_mutex );
return 0;
#elif defined( HAVE_KERNEL_SCHEDULER_H )
if( !p_condvar )
{
return B_BAD_VALUE;
}
if( !p_mutex )
{
return B_BAD_VALUE;
}
if( p_condvar->init < 2000 )
{
return 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 );
return 0;
#endif
}
/*****************************************************************************
* vlc_cond_destroy: destroy a condition
*****************************************************************************/
#ifdef DEBUG
# define vlc_cond_destroy( P_COND ) \
_vlc_cond_destroy( __FILE__, __LINE__, P_COND )
#else
# define vlc_cond_destroy( P_COND ) \
_vlc_cond_destroy( NULL, 0, P_COND )
#endif
static __inline__ int _vlc_cond_destroy( char * psz_file, int i_line,
vlc_cond_t *p_condvar )
{
#if defined( PTH_INIT_IN_PTH_H )
return 0;
#elif defined( ST_INIT_IN_ST_H )
return st_cond_destroy( *p_condvar );
#elif defined( WIN32 )
return( !CloseHandle( p_condvar->signal ) );
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
int i_result = pthread_cond_destroy( p_condvar );
if( i_result )
{
intf_ErrMsg( "thread %d error: cond_destroy failed at %s:%d (%s)",
pthread_self(), psz_file, i_line, strerror(i_result) );
}
return i_result;
#elif defined( HAVE_CTHREADS_H )
return 0;
#elif defined( HAVE_KERNEL_SCHEDULER_H )
p_condvar->init = 0;
return 0;
#endif
}
/*****************************************************************************
* vlc_thread_create: create a thread
*****************************************************************************/
#ifdef DEBUG
# define vlc_thread_create( P_THREAD, PSZ_NAME, FUNC, P_DATA ) \
_vlc_thread_create( __FILE__, __LINE__, P_THREAD, PSZ_NAME, FUNC, P_DATA )
#else
# define vlc_thread_create( P_THREAD, PSZ_NAME, FUNC, P_DATA ) \
_vlc_thread_create( NULL, 0, P_THREAD, PSZ_NAME, FUNC, P_DATA )
#endif
static __inline__ int _vlc_thread_create( char * psz_file, int i_line,
vlc_thread_t *p_thread,
char *psz_name,
vlc_thread_func_t func,
void *p_data )
{
int i_ret;
#ifdef GPROF
wrapper_t wrapper;
/* Initialize the wrapper structure */
wrapper.func = func;
wrapper.p_data = p_data;
getitimer( ITIMER_PROF, &wrapper.itimer );
vlc_mutex_init( &wrapper.lock );
vlc_cond_init( &wrapper.wait );
vlc_mutex_lock( &wrapper.lock );
/* Alter user-passed data so that we call the wrapper instead
* of the real function */
p_data = &wrapper;
func = vlc_thread_wrapper;
#endif
#if defined( PTH_INIT_IN_PTH_H )
*p_thread = pth_spawn( PTH_ATTR_DEFAULT, func, p_data );
i_ret = ( p_thread == NULL );
#elif defined( ST_INIT_IN_ST_H )
*p_thread = st_thread_create( func, p_data, 1, 0 );
i_ret = ( p_thread == NULL );
#elif defined( WIN32 )
unsigned threadID;
/* When using the MSVCRT C library you have to use the _beginthreadex
* function instead of CreateThread, otherwise you'll end up with memory
* leaks and the signal functions not working */
*p_thread = (HANDLE)_beginthreadex( NULL, 0, (PTHREAD_START) func,
p_data, 0, &threadID );
i_ret = ( *p_thread ? 0 : 1 );
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
i_ret = pthread_create( p_thread, NULL, func, p_data );
#elif defined( HAVE_CTHREADS_H )
*p_thread = cthread_fork( (cthread_fn_t)func, (any_t)p_data );
i_ret = 0;
#elif defined( HAVE_KERNEL_SCHEDULER_H )
*p_thread = spawn_thread( (thread_func)func, psz_name,
B_NORMAL_PRIORITY, p_data );
i_ret = resume_thread( *p_thread );
#endif
#ifdef GPROF
if( i_ret == 0 )
{
vlc_cond_wait( &wrapper.wait, &wrapper.lock );
}
vlc_mutex_unlock( &wrapper.lock );
vlc_mutex_destroy( &wrapper.lock );
vlc_cond_destroy( &wrapper.wait );
#endif
if( i_ret == 0 )
{
intf_WarnMsg( 2, "thread info: %d (%s) has been created (%s:%d)",
*p_thread, psz_name, psz_file, i_line );
}
else
{
intf_ErrMsg( "thread error: %s couldn't be created at %s:%d (%s)",
psz_name, psz_file, i_line, strerror(i_ret) );
}
return i_ret;
}
/*****************************************************************************
* vlc_thread_exit: terminate a thread
*****************************************************************************/
static __inline__ void vlc_thread_exit( void )
{
#if defined( PTH_INIT_IN_PTH_H )
pth_exit( 0 );
#elif defined( ST_INIT_IN_ST_H )
int result;
st_thread_exit( &result );
#elif defined( WIN32 )
/* For now we don't close the thread handles (because of race conditions).
* Need to be looked at. */
_endthreadex(0);
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
pthread_exit( 0 );
#elif defined( HAVE_CTHREADS_H )
int result;
cthread_exit( &result );
#elif defined( HAVE_KERNEL_SCHEDULER_H )
exit_thread( 0 );
#endif
}
/*****************************************************************************
* vlc_thread_join: wait until a thread exits
*****************************************************************************/
#ifdef DEBUG
# define vlc_thread_join( THREAD ) \
_vlc_thread_join( __FILE__, __LINE__, THREAD )
#else
# define vlc_thread_join( THREAD ) \
_vlc_thread_join( NULL, 0, THREAD )
#endif
static __inline__ void _vlc_thread_join( char * psz_file, int i_line,
vlc_thread_t thread )
{
int i_ret = 0;
#if defined( PTH_INIT_IN_PTH_H )
i_ret = pth_join( thread, NULL );
#elif defined( ST_INIT_IN_ST_H )
i_ret = st_thread_join( thread, NULL );
#elif defined( WIN32 )
WaitForSingleObject( thread, INFINITE );
#elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
i_ret = pthread_join( thread, NULL );
#elif defined( HAVE_CTHREADS_H )
cthread_join( thread );
i_ret = 1;
#elif defined( HAVE_KERNEL_SCHEDULER_H )
int32 exit_value;
wait_for_thread( thread, &exit_value );
#endif
if( i_ret )
{
intf_ErrMsg( "thread error: thread_join(%d) failed at %s:%d (%s)",
thread, psz_file, i_line, strerror(i_ret) );
}
else
{
intf_WarnMsg( 2, "thread info: %d has been joined (%s:%d)",
thread, psz_file, i_line );
}
}
#ifdef GPROF
static void *vlc_thread_wrapper( void *p_wrapper )
{
/* Put user data in thread-local variables */
void * p_data = ((wrapper_t*)p_wrapper)->p_data;
vlc_thread_func_t func = ((wrapper_t*)p_wrapper)->func;
/* Set the profile timer value */
setitimer( ITIMER_PROF, &((wrapper_t*)p_wrapper)->itimer, NULL );
/* Tell the calling thread that we don't need its data anymore */
vlc_mutex_lock( &((wrapper_t*)p_wrapper)->lock );
vlc_cond_signal( &((wrapper_t*)p_wrapper)->wait );
vlc_mutex_unlock( &((wrapper_t*)p_wrapper)->lock );
/* Call the real function */
return func( p_data );
}
#endif
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