X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fmisc%2Fthreads.c;h=7f9dd9e18f304b5d6c555de92d9b169e8a084426;hb=d666030b2349e8a710fcba4d2cabb912cc700580;hp=61964d1ef46a5788efda5491bc186f33d4e94f7c;hpb=780ba1b903df7fa55511cef97e83b836118e098a;p=vlc diff --git a/src/misc/threads.c b/src/misc/threads.c index 61964d1ef4..33270df4a6 100644 --- a/src/misc/threads.c +++ b/src/misc/threads.c @@ -1,12 +1,13 @@ /***************************************************************************** * threads.c : threads implementation for the VideoLAN client ***************************************************************************** - * Copyright (C) 1999, 2000, 2001, 2002 VideoLAN - * $Id: threads.c,v 1.40 2003/03/10 00:04:14 massiot Exp $ + * Copyright (C) 1999-2007 the VideoLAN team + * $Id$ * * Authors: Jean-Marc Dressler * Samuel Hocevar * Gildas Bazin + * Clément Sténac * * 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 @@ -20,12 +21,21 @@ * * 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. *****************************************************************************/ -#include +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include -#include +#include "libvlc.h" +#include +#ifdef HAVE_UNISTD_H +# include +#endif +#include #define VLC_THREADS_UNINITIALIZED 0 #define VLC_THREADS_PENDING 1 @@ -35,30 +45,102 @@ /***************************************************************************** * Global mutex for lazy initialization of the threads system *****************************************************************************/ -static volatile int i_initializations = 0; +static volatile unsigned i_initializations = 0; -#if defined( PTH_INIT_IN_PTH_H ) -#elif defined( ST_INIT_IN_ST_H ) -#elif defined( UNDER_CE ) -#elif defined( WIN32 ) -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) - static pthread_mutex_t once_mutex = PTHREAD_MUTEX_INITIALIZER; -#elif defined( HAVE_CTHREADS_H ) -#elif defined( HAVE_KERNEL_SCHEDULER_H ) +#if defined( LIBVLC_USE_PTHREAD ) +static pthread_mutex_t once_mutex = PTHREAD_MUTEX_INITIALIZER; +#endif + +/** + * Global process-wide VLC object. + * Contains inter-instance data, such as the module cache and global mutexes. + */ +static libvlc_global_data_t *p_root; + +libvlc_global_data_t *vlc_global( void ) +{ + assert( i_initializations > 0 ); + return p_root; +} + +/** + * Object running the current thread + */ +static vlc_threadvar_t thread_object_key; + +vlc_object_t *vlc_threadobj (void) +{ + return vlc_threadvar_get (&thread_object_key); +} + +vlc_threadvar_t msg_context_global_key; + +#if defined(LIBVLC_USE_PTHREAD) +static inline unsigned long vlc_threadid (void) +{ + union { pthread_t th; unsigned long int i; } v = { }; + v.th = pthread_self (); + return v.i; +} + +#if defined(HAVE_EXECINFO_H) && defined(HAVE_BACKTRACE) +# include #endif /***************************************************************************** - * Global variable for named mutexes + * vlc_thread_fatal: Report an error from the threading layer + ***************************************************************************** + * This is mostly meant for debugging. *****************************************************************************/ -typedef struct vlc_namedmutex_t vlc_namedmutex_t; -struct vlc_namedmutex_t +void vlc_pthread_fatal (const char *action, int error, + const char *file, unsigned line) { - vlc_mutex_t lock; + fprintf (stderr, "LibVLC fatal error %s in thread %lu at %s:%u: %d\n", + action, vlc_threadid (), file, line, error); + fflush (stderr); + + /* Sometimes strerror_r() crashes too, so make sure we print an error + * message before we invoke it */ +#ifdef __GLIBC__ + /* Avoid the strerror_r() prototype brain damage in glibc */ + errno = error; + dprintf (2, " Error message: %m at:\n"); +#else + char buf[1000]; + const char *msg; - char *psz_name; - int i_usage; - vlc_namedmutex_t *p_next; -}; + switch (strerror_r (error, buf, sizeof (buf))) + { + case 0: + msg = buf; + break; + case ERANGE: /* should never happen */ + msg = "unknwon (too big to display)"; + break; + default: + msg = "unknown (invalid error number)"; + break; + } + fprintf (stderr, " Error message: %s\n", msg); + fflush (stderr); +#endif + +#ifdef HAVE_BACKTRACE + void *stack[20]; + int len = backtrace (stack, sizeof (stack) / sizeof (stack[0])); + backtrace_symbols_fd (stack, len, 2); +#endif + + abort (); +} +#else +void vlc_pthread_fatal (const char *action, int error, + const char *file, unsigned line) +{ + (void)action; (void)error; (void)file; (void)line; + abort(); +} +#endif /***************************************************************************** * vlc_threads_init: initialize threads system @@ -67,247 +149,102 @@ struct vlc_namedmutex_t * keep the library really thread-safe. Some architectures don't support this * and thus do not guarantee the complete reentrancy. *****************************************************************************/ -int __vlc_threads_init( vlc_object_t *p_this ) +int vlc_threads_init( void ) { - static volatile int i_status = VLC_THREADS_UNINITIALIZED; - - libvlc_t *p_libvlc = (libvlc_t *)p_this; int i_ret = VLC_SUCCESS; /* If we have lazy mutex initialization, use it. Otherwise, we just * hope nothing wrong happens. */ -#if defined( PTH_INIT_IN_PTH_H ) -#elif defined( ST_INIT_IN_ST_H ) -#elif defined( UNDER_CE ) -#elif defined( WIN32 ) - HINSTANCE hInstLib; -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) +#if defined( LIBVLC_USE_PTHREAD ) pthread_mutex_lock( &once_mutex ); -#elif defined( HAVE_CTHREADS_H ) -#elif defined( HAVE_KERNEL_SCHEDULER_H ) #endif - if( i_status == VLC_THREADS_UNINITIALIZED ) + if( i_initializations == 0 ) { - i_status = VLC_THREADS_PENDING; - - /* We should be safe now. Do all the initialization stuff we want. */ - p_libvlc->b_ready = VLC_FALSE; - -#if defined( PTH_INIT_IN_PTH_H ) - i_ret = ( pth_init() == FALSE ); - -#elif defined( ST_INIT_IN_ST_H ) - i_ret = st_init(); - -#elif defined( UNDER_CE ) - /* Nothing to initialize */ - -#elif defined( WIN32 ) - /* Dynamically get the address of SignalObjectAndWait */ - if( GetVersion() < 0x80000000 ) + p_root = vlc_custom_create( NULL, sizeof( *p_root ), + VLC_OBJECT_GENERIC, "root" ); + if( p_root == NULL ) { - /* We are running on NT/2K/XP, we can use SignalObjectAndWait */ - hInstLib = LoadLibrary( "kernel32" ); - if( hInstLib ) - { - p_libvlc->SignalObjectAndWait = - (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib, - "SignalObjectAndWait" ); - } + i_ret = VLC_ENOMEM; + goto out; } - else - { - p_libvlc->SignalObjectAndWait = NULL; - } - - p_libvlc->b_fast_mutex = 0; - p_libvlc->i_win9x_cv = 0; - -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) -#elif defined( HAVE_CTHREADS_H ) -#elif defined( HAVE_KERNEL_SCHEDULER_H ) -#endif - vlc_object_create( p_libvlc, VLC_OBJECT_ROOT ); - - if( i_ret ) - { - i_status = VLC_THREADS_ERROR; - } - else - { - i_initializations++; - i_status = VLC_THREADS_READY; - } - } - else - { - /* Just increment the initialization count */ - i_initializations++; + /* We should be safe now. Do all the initialization stuff we want. */ + vlc_threadvar_create( &thread_object_key, NULL ); + vlc_threadvar_create( &msg_context_global_key, msg_StackDestroy ); } + i_initializations++; - /* If we have lazy mutex initialization support, unlock the mutex; - * otherwize, do a naive wait loop. */ -#if defined( PTH_INIT_IN_PTH_H ) - while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP ); -#elif defined( ST_INIT_IN_ST_H ) - while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP ); -#elif defined( UNDER_CE ) - while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP ); -#elif defined( WIN32 ) - while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP ); -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) +out: + /* If we have lazy mutex initialization support, unlock the mutex. + * Otherwize, we are screwed. */ +#if defined( LIBVLC_USE_PTHREAD ) pthread_mutex_unlock( &once_mutex ); -#elif defined( HAVE_CTHREADS_H ) - while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP ); -#elif defined( HAVE_KERNEL_SCHEDULER_H ) - while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP ); #endif - if( i_status != VLC_THREADS_READY ) - { - return VLC_ETHREAD; - } - return i_ret; } /***************************************************************************** * vlc_threads_end: stop threads system ***************************************************************************** - * FIXME: This function is far from being threadsafe. We should undo exactly - * what we did above in vlc_threads_init. + * FIXME: This function is far from being threadsafe. *****************************************************************************/ -int __vlc_threads_end( vlc_object_t *p_this ) +void vlc_threads_end( void ) { -#if defined( PTH_INIT_IN_PTH_H ) - i_initializations--; - if( i_initializations == 0 ) - { - return ( pth_kill() == FALSE ); - } - -#elif defined( ST_INIT_IN_ST_H ) - i_initializations--; - -#elif defined( UNDER_CE ) - i_initializations--; - -#elif defined( WIN32 ) - i_initializations--; - -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) +#if defined( LIBVLC_USE_PTHREAD ) pthread_mutex_lock( &once_mutex ); - i_initializations--; - pthread_mutex_unlock( &once_mutex ); +#endif -#elif defined( HAVE_CTHREADS_H ) - i_initializations--; + assert( i_initializations > 0 ); -#elif defined( HAVE_KERNEL_SCHEDULER_H ) + if( i_initializations == 1 ) + { + vlc_object_release( p_root ); + vlc_threadvar_delete( &msg_context_global_key ); + vlc_threadvar_delete( &thread_object_key ); + } i_initializations--; +#if defined( LIBVLC_USE_PTHREAD ) + pthread_mutex_unlock( &once_mutex ); #endif - return VLC_SUCCESS; } -/***************************************************************************** - * Prototype for GPROF wrapper - *****************************************************************************/ -#ifdef GPROF -typedef void *(*vlc_thread_func_t)(void *p_data); - -/* Wrapper function for profiling */ -static void * vlc_thread_wrapper ( void *p_wrapper ); - -# if defined( WIN32 ) && !defined( UNDER_CE ) - -# 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 && !UNDER_CE */ - -typedef struct wrapper_t -{ - /* 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 */ +#if defined (__GLIBC__) && (__GLIBC_MINOR__ < 6) +/* This is not prototyped under glibc, though it exists. */ +int pthread_mutexattr_setkind_np( pthread_mutexattr_t *attr, int kind ); +#endif /***************************************************************************** * vlc_mutex_init: initialize a mutex *****************************************************************************/ -int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex ) +int vlc_mutex_init( vlc_mutex_t *p_mutex ) { - p_mutex->p_this = p_this; - -#if defined( PTH_INIT_IN_PTH_H ) - return ( pth_mutex_init( &p_mutex->mutex ) == FALSE ); - -#elif defined( ST_INIT_IN_ST_H ) - p_mutex->mutex = st_mutex_new(); - return ( p_mutex->mutex == NULL ) ? errno : 0; - +#if defined( LIBVLC_USE_PTHREAD ) + pthread_mutexattr_t attr; + int i_result; + + pthread_mutexattr_init( &attr ); + +# ifndef NDEBUG + /* Create error-checking mutex to detect problems more easily. */ +# if defined (__GLIBC__) && (__GLIBC_MINOR__ < 6) + pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP ); +# else + pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK ); +# endif +# endif + i_result = pthread_mutex_init( p_mutex, &attr ); + pthread_mutexattr_destroy( &attr ); + return i_result; #elif defined( UNDER_CE ) InitializeCriticalSection( &p_mutex->csection ); return 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( p_this->p_libvlc->SignalObjectAndWait && - !p_this->p_libvlc->b_fast_mutex ) - { - /* We are running on NT/2K/XP, we can use SignalObjectAndWait */ - p_mutex->mutex = CreateMutex( 0, FALSE, 0 ); - return ( p_mutex->mutex != NULL ? 0 : 1 ); - } - else - { - p_mutex->mutex = NULL; - InitializeCriticalSection( &p_mutex->csection ); - return 0; - } - -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) -# if defined(DEBUG) && defined(SYS_LINUX) - { - /* Create error-checking mutex to detect 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->mutex, &attr ); - pthread_mutexattr_destroy( &attr ); - return( i_result ); - } -# endif - return pthread_mutex_init( &p_mutex->mutex, NULL ); - -#elif defined( HAVE_CTHREADS_H ) - mutex_init( p_mutex ); - return 0; + *p_mutex = CreateMutex( 0, FALSE, 0 ); + return (*p_mutex != NULL) ? 0 : ENOMEM; #elif defined( HAVE_KERNEL_SCHEDULER_H ) /* check the arguments and whether it's already been initialized */ @@ -334,81 +271,88 @@ int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex ) } /***************************************************************************** - * vlc_mutex_destroy: destroy a mutex, inner version + * vlc_mutex_init: initialize a recursive mutex (Do not use) *****************************************************************************/ -int __vlc_mutex_destroy( char * psz_file, int i_line, vlc_mutex_t *p_mutex ) +int vlc_mutex_init_recursive( vlc_mutex_t *p_mutex ) { - int i_result; - /* In case of error : */ - int i_thread = -1; - const char * psz_error = ""; +#if defined( LIBVLC_USE_PTHREAD ) + pthread_mutexattr_t attr; + int i_result; + + pthread_mutexattr_init( &attr ); +# if defined (__GLIBC__) && (__GLIBC_MINOR__ < 6) + pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_RECURSIVE_NP ); +# else + pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_RECURSIVE ); +# endif + i_result = pthread_mutex_init( p_mutex, &attr ); + pthread_mutexattr_destroy( &attr ); + return( i_result ); +#elif defined( WIN32 ) + /* Create mutex returns a recursive mutex */ + *p_mutex = CreateMutex( 0, FALSE, 0 ); + return (*p_mutex != NULL) ? 0 : ENOMEM; +#else +# error Unimplemented! +#endif +} -#if defined( PTH_INIT_IN_PTH_H ) - return 0; -#elif defined( ST_INIT_IN_ST_H ) - i_result = st_mutex_destroy( p_mutex->mutex ); +/***************************************************************************** + * vlc_mutex_destroy: destroy a mutex, inner version + *****************************************************************************/ +void __vlc_mutex_destroy( const char * psz_file, int i_line, vlc_mutex_t *p_mutex ) +{ +#if defined( LIBVLC_USE_PTHREAD ) + int val = pthread_mutex_destroy( p_mutex ); + VLC_THREAD_ASSERT ("destroying mutex"); #elif defined( UNDER_CE ) + VLC_UNUSED( psz_file); VLC_UNUSED( i_line ); + DeleteCriticalSection( &p_mutex->csection ); - return 0; #elif defined( WIN32 ) - if( p_mutex->mutex ) - { - CloseHandle( p_mutex->mutex ); - } - else - { - DeleteCriticalSection( &p_mutex->csection ); - } - return 0; + VLC_UNUSED( psz_file); VLC_UNUSED( i_line ); -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) - i_result = pthread_mutex_destroy( &p_mutex->mutex ); - if ( i_result ) - { - i_thread = (int)pthread_self(); - psz_error = strerror(i_result); - } - -#elif defined( HAVE_CTHREADS_H ) - return 0; + CloseHandle( *p_mutex ); #elif defined( HAVE_KERNEL_SCHEDULER_H ) if( p_mutex->init == 9999 ) - { delete_sem( p_mutex->lock ); - } p_mutex->init = 0; - return B_OK; -#endif - if( i_result ) - { - msg_Err( p_mutex->p_this, - "thread %d: mutex_destroy failed at %s:%d (%d:%s)", - i_thread, psz_file, i_line, i_result, psz_error ); - } - return i_result; +#endif } /***************************************************************************** * vlc_cond_init: initialize a condition *****************************************************************************/ -int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar ) +int __vlc_cond_init( vlc_cond_t *p_condvar ) { - p_condvar->p_this = p_this; - -#if defined( PTH_INIT_IN_PTH_H ) - return ( pth_cond_init( &p_condvar->cond ) == FALSE ); - -#elif defined( ST_INIT_IN_ST_H ) - p_condvar->cond = st_cond_new(); - return ( p_condvar->cond == NULL ) ? errno : 0; - -#elif defined( UNDER_CE ) +#if defined( LIBVLC_USE_PTHREAD ) + pthread_condattr_t attr; + int ret; + + ret = pthread_condattr_init (&attr); + if (ret) + return ret; + +# if !defined (_POSIX_CLOCK_SELECTION) + /* Fairly outdated POSIX support (that was defined in 2001) */ +# define _POSIX_CLOCK_SELECTION (-1) +# endif +# if (_POSIX_CLOCK_SELECTION >= 0) + /* NOTE: This must be the same clock as the one in mtime.c */ + pthread_condattr_setclock (&attr, CLOCK_MONOTONIC); +# endif + + ret = pthread_cond_init (p_condvar, &attr); + pthread_condattr_destroy (&attr); + return ret; + +#elif defined( UNDER_CE ) || defined( WIN32 ) /* Initialize counter */ p_condvar->i_waiting_threads = 0; @@ -419,57 +363,6 @@ int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar ) NULL ); /* unnamed */ return !p_condvar->event; -#elif defined( WIN32 ) - /* Initialize counter */ - p_condvar->i_waiting_threads = 0; - - /* Misc init */ - p_condvar->i_win9x_cv = p_this->p_libvlc->i_win9x_cv; - p_condvar->SignalObjectAndWait = p_this->p_libvlc->SignalObjectAndWait; - - if( (p_condvar->SignalObjectAndWait && !p_this->p_libvlc->b_fast_mutex) - || p_condvar->i_win9x_cv == 0 ) - { - /* Create an auto-reset event. */ - p_condvar->event = CreateEvent( NULL, /* no security */ - FALSE, /* auto-reset event */ - FALSE, /* start non-signaled */ - NULL ); /* unnamed */ - - p_condvar->semaphore = NULL; - return !p_condvar->event; - } - else - { - p_condvar->semaphore = CreateSemaphore( NULL, /* no security */ - 0, /* initial count */ - 0x7fffffff, /* max count */ - NULL ); /* unnamed */ - - if( p_condvar->i_win9x_cv == 1 ) - /* Create a manual-reset event initially signaled. */ - p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL ); - else - /* Create a auto-reset event. */ - p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL ); - - InitializeCriticalSection( &p_condvar->csection ); - - return !p_condvar->semaphore || !p_condvar->event; - } - -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) - return pthread_cond_init( &p_condvar->cond, 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 ) { @@ -484,58 +377,87 @@ int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar ) p_condvar->thread = -1; p_condvar->init = 9999; return 0; + #endif } /***************************************************************************** * vlc_cond_destroy: destroy a condition, inner version *****************************************************************************/ -int __vlc_cond_destroy( char * psz_file, int i_line, vlc_cond_t *p_condvar ) +void __vlc_cond_destroy( const 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( LIBVLC_USE_PTHREAD ) + int val = pthread_cond_destroy( p_condvar ); + VLC_THREAD_ASSERT ("destroying condition"); -#if defined( PTH_INIT_IN_PTH_H ) - return 0; +#elif defined( UNDER_CE ) || defined( WIN32 ) + VLC_UNUSED( psz_file); VLC_UNUSED( i_line ); -#elif defined( ST_INIT_IN_ST_H ) - i_result = st_cond_destroy( p_condvar->cond ); + CloseHandle( p_condvar->event ); -#elif defined( UNDER_CE ) - i_result = !CloseHandle( p_condvar->event ); +#elif defined( HAVE_KERNEL_SCHEDULER_H ) + p_condvar->init = 0; +#endif +} + +/***************************************************************************** + * vlc_tls_create: create a thread-local variable + *****************************************************************************/ +int vlc_threadvar_create( vlc_threadvar_t *p_tls, void (*destr) (void *) ) +{ + int i_ret; + +#if defined( LIBVLC_USE_PTHREAD ) + i_ret = pthread_key_create( p_tls, destr ); +#elif defined( UNDER_CE ) + i_ret = ENOSYS; #elif defined( WIN32 ) - if( !p_condvar->semaphore ) - i_result = !CloseHandle( p_condvar->event ); - else - i_result = !CloseHandle( p_condvar->event ) - || !CloseHandle( p_condvar->semaphore ); + *p_tls = TlsAlloc(); + i_ret = (*p_tls == TLS_OUT_OF_INDEXES) ? EAGAIN : 0; +#else +# error Unimplemented! +#endif + return i_ret; +} -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) - i_result = pthread_cond_destroy( &p_condvar->cond ); - if ( i_result ) - { - i_thread = (int)pthread_self(); - psz_error = strerror(i_result); - } +void vlc_threadvar_delete (vlc_threadvar_t *p_tls) +{ +#if defined( LIBVLC_USE_PTHREAD ) + pthread_key_delete (*p_tls); +#elif defined( UNDER_CE ) +#elif defined( WIN32 ) + TlsFree (*p_tls); +#else +# error Unimplemented! +#endif +} -#elif defined( HAVE_CTHREADS_H ) - return 0; +struct vlc_thread_boot +{ + void * (*entry) (void *); + vlc_object_t *object; +}; -#elif defined( HAVE_KERNEL_SCHEDULER_H ) - p_condvar->init = 0; - return 0; +#if defined (LIBVLC_USE_PTHREAD) +# define THREAD_RTYPE void * +# define THREAD_RVAL NULL +#elif defined (WIN32) +# define THREAD_RTYPE __stdcall unsigned +# define THREAD_RVAL 0 #endif - if( i_result ) - { - msg_Err( p_condvar->p_this, - "thread %d: cond_destroy failed at %s:%d (%d:%s)", - i_thread, psz_file, i_line, i_result, psz_error ); - } - return i_result; +static THREAD_RTYPE thread_entry (void *data) +{ + vlc_object_t *obj = ((struct vlc_thread_boot *)data)->object; + void *(*func) (void *) = ((struct vlc_thread_boot *)data)->entry; + + free (data); + vlc_threadvar_set (&thread_object_key, obj); + msg_Dbg (obj, "thread started"); + func (obj); + msg_Dbg (obj, "thread ended"); + return THREAD_RVAL; } /***************************************************************************** @@ -544,80 +466,53 @@ int __vlc_cond_destroy( char * psz_file, int i_line, vlc_cond_t *p_condvar ) * Note that i_priority is only taken into account on platforms supporting * userland real-time priority threads. *****************************************************************************/ -int __vlc_thread_create( vlc_object_t *p_this, char * psz_file, int i_line, - char *psz_name, void * ( *func ) ( void * ), - int i_priority, vlc_bool_t b_wait ) +int __vlc_thread_create( vlc_object_t *p_this, const char * psz_file, int i_line, + const char *psz_name, void * ( *func ) ( void * ), + int i_priority, bool b_wait ) { int i_ret; - void *p_data; - - vlc_mutex_lock( &p_this->object_lock ); + vlc_object_internals_t *p_priv = vlc_internals( p_this ); -#ifdef GPROF - wrapper_t wrapper; - - /* Initialize the wrapper structure */ - wrapper.func = func; - wrapper.p_data = (void *)p_this; - getitimer( ITIMER_PROF, &wrapper.itimer ); - vlc_mutex_init( p_this, &wrapper.lock ); - vlc_cond_init( p_this, &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; -#else - p_data = (void *)p_this; -#endif + struct vlc_thread_boot *boot = malloc (sizeof (*boot)); + if (boot == NULL) + return errno; + boot->entry = func; + boot->object = p_this; -#if defined( PTH_INIT_IN_PTH_H ) - p_this->thread_id = pth_spawn( PTH_ATTR_DEFAULT, func, p_data ); - i_ret = p_this->thread_id == NULL; - -#elif defined( ST_INIT_IN_ST_H ) - p_this->thread_id = st_thread_create( func, p_data, 1, 0 ); - i_ret = 0; + vlc_mutex_lock( &p_this->object_lock ); -#elif defined( WIN32 ) || defined( UNDER_CE ) - { - 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 (see Microsoft - * Knowledge Base, article 104641) */ - p_this->thread_id = -#if defined( UNDER_CE ) - (HANDLE)CreateThread( NULL, 0, (PTHREAD_START) func, - p_data, 0, &threadID ); -#else - (HANDLE)_beginthreadex( NULL, 0, (PTHREAD_START) func, - p_data, 0, &threadID ); +#if defined( LIBVLC_USE_PTHREAD ) + sigset_t set, oldset; + + /* We really don't want signals to (literaly) interrupt our blocking I/O + * system calls. SIGPIPE is especially bad, as it can be caused by remote + * peers through connected sockets. Generally, we cannot know which signals + * are handled by the main program. Also, external LibVLC bindings tend not + * to setup a proper signal mask before invoking LibVLC. + * Hence, we hereby block all signals, except those for which blocking is + * undefined, as listed below. Note that SIGKILL and SIGSTOP need not be + * listed (see the documentation for pthread_sigmask) here. */ + sigfillset (&set); + sigdelset (&set, SIGFPE); + sigdelset (&set, SIGILL); + sigdelset (&set, SIGSEGV); + sigdelset (&set, SIGBUS); + pthread_sigmask (SIG_BLOCK, &set, &oldset); + + i_ret = pthread_create( &p_priv->thread_id, NULL, thread_entry, boot ); + pthread_sigmask (SIG_SETMASK, &oldset, NULL); + +#ifndef __APPLE__ + if( config_GetInt( p_this, "rt-priority" ) > 0 ) #endif - } - - if ( p_this->thread_id && i_priority ) - { - if ( !SetThreadPriority(p_this->thread_id, i_priority) ) - { - msg_Warn( p_this, "couldn't set a faster priority" ); - i_priority = 0; - } - } - - i_ret = ( p_this->thread_id ? 0 : 1 ); - -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) - i_ret = pthread_create( &p_this->thread_id, NULL, func, p_data ); - -#ifdef SYS_DARWIN - if ( i_priority ) { int i_error, i_policy; struct sched_param param; + memset( ¶m, 0, sizeof(struct sched_param) ); - if ( i_priority < 0 ) + if( config_GetType( p_this, "rt-offset" ) ) + i_priority += config_GetInt( p_this, "rt-offset" ); + if( i_priority <= 0 ) { param.sched_priority = (-1) * i_priority; i_policy = SCHED_OTHER; @@ -627,36 +522,55 @@ int __vlc_thread_create( vlc_object_t *p_this, char * psz_file, int i_line, param.sched_priority = i_priority; i_policy = SCHED_RR; } - if ( (i_error = pthread_setschedparam( p_this->thread_id, + if( (i_error = pthread_setschedparam( p_priv->thread_id, i_policy, ¶m )) ) { - msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s", - psz_file, i_line, strerror(i_error) ); + errno = i_error; + msg_Warn( p_this, "couldn't set thread priority (%s:%d): %m", + psz_file, i_line ); i_priority = 0; } } +#ifndef __APPLE__ + else + i_priority = 0; #endif -#elif defined( HAVE_CTHREADS_H ) - p_this->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_data ); - i_ret = 0; - -#elif defined( HAVE_KERNEL_SCHEDULER_H ) - p_this->thread_id = spawn_thread( (thread_func)func, psz_name, - i_priority, p_data ); - i_ret = resume_thread( p_this->thread_id ); - +#elif defined( WIN32 ) || defined( UNDER_CE ) + { + /* 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 (see Microsoft + * Knowledge Base, article 104641) */ +#if defined( UNDER_CE ) + HANDLE hThread = CreateThread( NULL, 0, thread_entry, + (LPVOID)boot, CREATE_SUSPENDED, + NULL ); +#else + HANDLE hThread = (HANDLE)(uintptr_t) + _beginthreadex( NULL, 0, thread_entry, boot, + CREATE_SUSPENDED, NULL ); #endif + p_priv->thread_id = hThread; + ResumeThread(hThread); + } -#ifdef GPROF - if( i_ret == 0 ) + i_ret = ( p_priv->thread_id ? 0 : errno ); + + if( !i_ret && i_priority ) { - vlc_cond_wait( &wrapper.wait, &wrapper.lock ); + if( !SetThreadPriority(p_priv->thread_id, i_priority) ) + { + msg_Warn( p_this, "couldn't set a faster priority" ); + i_priority = 0; + } } - vlc_mutex_unlock( &wrapper.lock ); - vlc_mutex_destroy( &wrapper.lock ); - vlc_cond_destroy( &wrapper.wait ); +#elif defined( HAVE_KERNEL_SCHEDULER_H ) + p_priv->thread_id = spawn_thread( (thread_func)thread_entry, psz_name, + i_priority, p_data ); + i_ret = resume_thread( p_priv->thread_id ); + #endif if( i_ret == 0 ) @@ -664,29 +578,22 @@ int __vlc_thread_create( vlc_object_t *p_this, char * psz_file, int i_line, if( b_wait ) { msg_Dbg( p_this, "waiting for thread completion" ); - vlc_cond_wait( &p_this->object_wait, &p_this->object_lock ); + vlc_object_wait( p_this ); } - p_this->b_thread = 1; - - msg_Dbg( p_this, "thread %d (%s) created at priority %d (%s:%d)", - (int)p_this->thread_id, psz_name, i_priority, + p_priv->b_thread = true; + msg_Dbg( p_this, "thread %lu (%s) created at priority %d (%s:%d)", + (unsigned long)p_priv->thread_id, psz_name, i_priority, psz_file, i_line ); - - vlc_mutex_unlock( &p_this->object_lock ); } else { -#ifdef HAVE_STRERROR - msg_Err( p_this, "%s thread could not be created at %s:%d (%s)", - psz_name, psz_file, i_line, strerror(i_ret) ); -#else - msg_Err( p_this, "%s thread could not be created at %s:%d", + errno = i_ret; + msg_Err( p_this, "%s thread could not be created at %s:%d (%m)", psz_name, psz_file, i_line ); -#endif - vlc_mutex_unlock( &p_this->object_lock ); } + vlc_mutex_unlock( &p_this->object_lock ); return i_ret; } @@ -694,26 +601,23 @@ int __vlc_thread_create( vlc_object_t *p_this, char * psz_file, int i_line, * vlc_thread_set_priority: set the priority of the current thread when we * couldn't set it in vlc_thread_create (for instance for the main thread) *****************************************************************************/ -int __vlc_thread_set_priority( vlc_object_t *p_this, char * psz_file, +int __vlc_thread_set_priority( vlc_object_t *p_this, const char * psz_file, int i_line, int i_priority ) { -#if defined( PTH_INIT_IN_PTH_H ) || defined( ST_INIT_IN_ST_H ) -#elif defined( WIN32 ) || defined( UNDER_CE ) - if ( !SetThreadPriority(GetCurrentThread(), i_priority) ) - { - msg_Warn( p_this, "couldn't set a faster priority" ); - return 1; - } - -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) + vlc_object_internals_t *p_priv = vlc_internals( p_this ); -#ifdef SYS_DARWIN - if ( i_priority ) +#if defined( LIBVLC_USE_PTHREAD ) +# ifndef __APPLE__ + if( config_GetInt( p_this, "rt-priority" ) > 0 ) +# endif { int i_error, i_policy; struct sched_param param; + memset( ¶m, 0, sizeof(struct sched_param) ); - if ( i_priority < 0 ) + if( config_GetType( p_this, "rt-offset" ) ) + i_priority += config_GetInt( p_this, "rt-offset" ); + if( i_priority <= 0 ) { param.sched_priority = (-1) * i_priority; i_policy = SCHED_OTHER; @@ -723,15 +627,28 @@ int __vlc_thread_set_priority( vlc_object_t *p_this, char * psz_file, param.sched_priority = i_priority; i_policy = SCHED_RR; } - if ( (i_error = pthread_setschedparam( pthread_self(), + if( !p_priv->thread_id ) + p_priv->thread_id = pthread_self(); + if( (i_error = pthread_setschedparam( p_priv->thread_id, i_policy, ¶m )) ) { - msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s", - psz_file, i_line, strerror(i_error) ); + errno = i_error; + msg_Warn( p_this, "couldn't set thread priority (%s:%d): %m", + psz_file, i_line ); i_priority = 0; } } -#endif + +#elif defined( WIN32 ) || defined( UNDER_CE ) + VLC_UNUSED( psz_file); VLC_UNUSED( i_line ); + + if( !p_priv->thread_id ) + p_priv->thread_id = GetCurrentThread(); + if( !SetThreadPriority(p_priv->thread_id, i_priority) ) + { + msg_Warn( p_this, "couldn't set a faster priority" ); + return 1; + } #endif @@ -743,82 +660,105 @@ int __vlc_thread_set_priority( vlc_object_t *p_this, char * psz_file, *****************************************************************************/ void __vlc_thread_ready( vlc_object_t *p_this ) { - vlc_mutex_lock( &p_this->object_lock ); - vlc_cond_signal( &p_this->object_wait ); - vlc_mutex_unlock( &p_this->object_lock ); + vlc_object_signal( p_this ); } /***************************************************************************** * vlc_thread_join: wait until a thread exits, inner version *****************************************************************************/ -void __vlc_thread_join( vlc_object_t *p_this, char * psz_file, int i_line ) +void __vlc_thread_join( vlc_object_t *p_this, const char * psz_file, int i_line ) { + vlc_object_internals_t *p_priv = vlc_internals( p_this ); int i_ret = 0; -#if defined( PTH_INIT_IN_PTH_H ) - i_ret = ( pth_join( p_this->thread_id, NULL ) == FALSE ); - -#elif defined( ST_INIT_IN_ST_H ) - i_ret = st_thread_join( p_this->thread_id, NULL ); - -#elif defined( UNDER_CE ) - WaitForSingleObject( p_this->thread_id, INFINITE ); +#if defined( LIBVLC_USE_PTHREAD ) + /* Make sure we do return if we are calling vlc_thread_join() + * from the joined thread */ + if (pthread_equal (pthread_self (), p_priv->thread_id)) + i_ret = pthread_detach (p_priv->thread_id); + else + i_ret = pthread_join (p_priv->thread_id, NULL); + +#elif defined( UNDER_CE ) || defined( WIN32 ) + HMODULE hmodule; + BOOL (WINAPI *OurGetThreadTimes)( HANDLE, FILETIME*, FILETIME*, + FILETIME*, FILETIME* ); + FILETIME create_ft, exit_ft, kernel_ft, user_ft; + int64_t real_time, kernel_time, user_time; + HANDLE hThread; + + /* + ** object will close its thread handle when destroyed, duplicate it here + ** to be on the safe side + */ + if( ! DuplicateHandle(GetCurrentProcess(), + p_priv->thread_id, + GetCurrentProcess(), + &hThread, + 0, + FALSE, + DUPLICATE_SAME_ACCESS) ) + { + p_priv->b_thread = false; + i_ret = GetLastError(); + goto error; + } -#elif defined( WIN32 ) - WaitForSingleObject( p_this->thread_id, INFINITE ); + WaitForSingleObject( hThread, INFINITE ); -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) - i_ret = pthread_join( p_this->thread_id, NULL ); +#if defined( UNDER_CE ) + hmodule = GetModuleHandle( _T("COREDLL") ); +#else + hmodule = GetModuleHandle( _T("KERNEL32") ); +#endif + OurGetThreadTimes = (BOOL (WINAPI*)( HANDLE, FILETIME*, FILETIME*, + FILETIME*, FILETIME* )) + GetProcAddress( hmodule, _T("GetThreadTimes") ); -#elif defined( HAVE_CTHREADS_H ) - cthread_join( p_this->thread_id ); - i_ret = 1; + if( OurGetThreadTimes && + OurGetThreadTimes( hThread, + &create_ft, &exit_ft, &kernel_ft, &user_ft ) ) + { + real_time = + ((((int64_t)exit_ft.dwHighDateTime)<<32)| exit_ft.dwLowDateTime) - + ((((int64_t)create_ft.dwHighDateTime)<<32)| create_ft.dwLowDateTime); + real_time /= 10; + + kernel_time = + ((((int64_t)kernel_ft.dwHighDateTime)<<32)| + kernel_ft.dwLowDateTime) / 10; + + user_time = + ((((int64_t)user_ft.dwHighDateTime)<<32)| + user_ft.dwLowDateTime) / 10; + + msg_Dbg( p_this, "thread times: " + "real %"PRId64"m%fs, kernel %"PRId64"m%fs, user %"PRId64"m%fs", + real_time/60/1000000, + (double)((real_time%(60*1000000))/1000000.0), + kernel_time/60/1000000, + (double)((kernel_time%(60*1000000))/1000000.0), + user_time/60/1000000, + (double)((user_time%(60*1000000))/1000000.0) ); + } + CloseHandle( hThread ); +error: #elif defined( HAVE_KERNEL_SCHEDULER_H ) - int32 exit_value; - wait_for_thread( p_this->thread_id, &exit_value ); + int32_t exit_value; + i_ret = (B_OK == wait_for_thread( p_priv->thread_id, &exit_value )); #endif if( i_ret ) { -#ifdef HAVE_STRERROR - msg_Err( p_this, "thread_join(%d) failed at %s:%d (%s)", - (int)p_this->thread_id, psz_file, i_line, - strerror(i_ret) ); -#else - msg_Err( p_this, "thread_join(%d) failed at %s:%d", - (int)p_this->thread_id, psz_file, i_line ); -#endif + errno = i_ret; + msg_Err( p_this, "thread_join(%lu) failed at %s:%d (%m)", + (unsigned long)p_priv->thread_id, psz_file, i_line ); } else - { - msg_Dbg( p_this, "thread %d joined (%s:%d)", - (int)p_this->thread_id, psz_file, i_line ); - } + msg_Dbg( p_this, "thread %lu joined (%s:%d)", + (unsigned long)p_priv->thread_id, psz_file, i_line ); - p_this->b_thread = 0; + p_priv->b_thread = false; } - -/***************************************************************************** - * vlc_thread_wrapper: wrapper around thread functions used when profiling. - *****************************************************************************/ -#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