* vlc_threads.h : threads implementation for the VideoLAN client
* This header provides portable declarations for mutexes & conditions
*****************************************************************************
- * Copyright (C) 1999, 2002 the VideoLAN team
+ * Copyright (C) 1999, 2002 VLC authors and VideoLAN
* Copyright © 2007-2008 Rémi Denis-Courmont
*
* Authors: Jean-Marc Dressler <polux@via.ecp.fr>
* Gildas Bazin <gbazin@netcourrier.com>
* Christophe Massiot <massiot@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
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 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.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifndef VLC_THREADS_H_
*
*/
-#if defined( UNDER_CE )
-# include <errno.h> /* WinCE API */
-#elif defined( WIN32 )
-# include <process.h> /* Win32 API */
-# include <errno.h>
-
-#else /* pthreads (like Linux & BSD) */
-# define LIBVLC_USE_PTHREAD 1
-# define LIBVLC_USE_PTHREAD_CANCEL 1
-# define _APPLE_C_SOURCE 1 /* Proper pthread semantics on OSX */
-
-# include <stdlib.h> /* lldiv_t definition (only in C99) */
-# include <unistd.h> /* _POSIX_SPIN_LOCKS */
-# include <pthread.h>
- /* Needed for pthread_cond_timedwait */
-# include <errno.h>
-# include <time.h>
-
-#endif
-
-/*****************************************************************************
- * Constants
- *****************************************************************************/
-
-/* Thread priorities */
-#ifdef __APPLE__
-# define VLC_THREAD_PRIORITY_LOW 0
-# define VLC_THREAD_PRIORITY_INPUT 22
-# define VLC_THREAD_PRIORITY_AUDIO 22
-# define VLC_THREAD_PRIORITY_VIDEO 0
-# define VLC_THREAD_PRIORITY_OUTPUT 22
-# define VLC_THREAD_PRIORITY_HIGHEST 22
-
-#elif defined(LIBVLC_USE_PTHREAD)
-# define VLC_THREAD_PRIORITY_LOW 0
-# define VLC_THREAD_PRIORITY_INPUT 10
-# define VLC_THREAD_PRIORITY_AUDIO 5
-# define VLC_THREAD_PRIORITY_VIDEO 0
-# define VLC_THREAD_PRIORITY_OUTPUT 15
-# define VLC_THREAD_PRIORITY_HIGHEST 20
-
-#elif defined(WIN32) || defined(UNDER_CE)
-/* Define different priorities for WinNT/2K/XP and Win9x/Me */
-# define VLC_THREAD_PRIORITY_LOW 0
-# define VLC_THREAD_PRIORITY_INPUT \
- THREAD_PRIORITY_ABOVE_NORMAL
-# define VLC_THREAD_PRIORITY_AUDIO \
- THREAD_PRIORITY_HIGHEST
-# define VLC_THREAD_PRIORITY_VIDEO 0
-# define VLC_THREAD_PRIORITY_OUTPUT \
- THREAD_PRIORITY_ABOVE_NORMAL
-# define VLC_THREAD_PRIORITY_HIGHEST \
- THREAD_PRIORITY_TIME_CRITICAL
+#if defined (_WIN32)
+# include <process.h>
+# ifndef ETIMEDOUT
+# define ETIMEDOUT 10060 /* This is the value in winsock.h. */
+# endif
-#else
-# define VLC_THREAD_PRIORITY_LOW 0
-# define VLC_THREAD_PRIORITY_INPUT 0
-# define VLC_THREAD_PRIORITY_AUDIO 0
-# define VLC_THREAD_PRIORITY_VIDEO 0
-# define VLC_THREAD_PRIORITY_OUTPUT 0
-# define VLC_THREAD_PRIORITY_HIGHEST 0
+typedef struct vlc_thread *vlc_thread_t;
+typedef struct
+{
+ bool dynamic;
+ union
+ {
+ struct
+ {
+ bool locked;
+ unsigned long contention;
+ };
+ CRITICAL_SECTION mutex;
+ };
+} vlc_mutex_t;
+#define VLC_STATIC_MUTEX { false, { { false, 0 } } }
+typedef struct
+{
+ HANDLE handle;
+ unsigned clock;
+} vlc_cond_t;
+#define VLC_STATIC_COND { 0, 0 }
+typedef HANDLE vlc_sem_t;
+#define LIBVLC_NEED_RWLOCK
+typedef struct vlc_threadvar *vlc_threadvar_t;
+typedef struct vlc_timer *vlc_timer_t;
+
+# define VLC_THREAD_PRIORITY_LOW 0
+# define VLC_THREAD_PRIORITY_INPUT THREAD_PRIORITY_ABOVE_NORMAL
+# define VLC_THREAD_PRIORITY_AUDIO THREAD_PRIORITY_HIGHEST
+# define VLC_THREAD_PRIORITY_VIDEO 0
+# define VLC_THREAD_PRIORITY_OUTPUT THREAD_PRIORITY_ABOVE_NORMAL
+# define VLC_THREAD_PRIORITY_HIGHEST THREAD_PRIORITY_TIME_CRITICAL
+
+#elif defined (__OS2__)
+# include <errno.h>
+
+typedef struct vlc_thread *vlc_thread_t;
+typedef struct
+{
+ bool dynamic;
+ union
+ {
+ struct
+ {
+ bool locked;
+ unsigned long contention;
+ };
+ HMTX hmtx;
+ };
+} vlc_mutex_t;
+#define VLC_STATIC_MUTEX { false, { { false, 0 } } }
+typedef struct
+{
+ HEV hev;
+ unsigned clock;
+} vlc_cond_t;
+#define VLC_STATIC_COND { 0, 0 }
+#define LIBVLC_NEED_SEMAPHORE
+#define LIBVLC_NEED_RWLOCK
+typedef struct vlc_threadvar *vlc_threadvar_t;
+typedef struct vlc_timer *vlc_timer_t;
+
+# define VLC_THREAD_PRIORITY_LOW 0
+# define VLC_THREAD_PRIORITY_INPUT \
+ MAKESHORT(PRTYD_MAXIMUM / 2, PRTYC_REGULAR)
+# define VLC_THREAD_PRIORITY_AUDIO MAKESHORT(PRTYD_MAXIMUM, PRTYC_REGULAR)
+# define VLC_THREAD_PRIORITY_VIDEO 0
+# define VLC_THREAD_PRIORITY_OUTPUT \
+ MAKESHORT(PRTYD_MAXIMUM / 2, PRTYC_REGULAR)
+# define VLC_THREAD_PRIORITY_HIGHEST MAKESHORT(0, PRTYC_TIMECRITICAL)
+
+# define pthread_sigmask sigprocmask
+
+#elif defined (__ANDROID__) /* pthreads subset without pthread_cancel() */
+# include <unistd.h>
+# include <pthread.h>
+# include <poll.h>
+# define LIBVLC_USE_PTHREAD_CLEANUP 1
+# define LIBVLC_NEED_SEMAPHORE
+# define LIBVLC_NEED_RWLOCK
+
+typedef struct vlc_thread *vlc_thread_t;
+typedef pthread_mutex_t vlc_mutex_t;
+#define VLC_STATIC_MUTEX PTHREAD_MUTEX_INITIALIZER
+typedef struct
+{
+ pthread_cond_t cond;
+ unsigned clock;
+} vlc_cond_t;
+#define VLC_STATIC_COND { PTHREAD_COND_INITIALIZER, CLOCK_REALTIME }
-#endif
+typedef pthread_key_t vlc_threadvar_t;
+typedef struct vlc_timer *vlc_timer_t;
+
+# define VLC_THREAD_PRIORITY_LOW 0
+# define VLC_THREAD_PRIORITY_INPUT 0
+# define VLC_THREAD_PRIORITY_AUDIO 0
+# define VLC_THREAD_PRIORITY_VIDEO 0
+# define VLC_THREAD_PRIORITY_OUTPUT 0
+# define VLC_THREAD_PRIORITY_HIGHEST 0
+
+#elif defined (__APPLE__)
+# define _APPLE_C_SOURCE 1 /* Proper pthread semantics on OSX */
+# include <unistd.h>
+# include <pthread.h>
+/* Unnamed POSIX semaphores not supported on Mac OS X */
+# include <mach/semaphore.h>
+# include <mach/task.h>
+# define LIBVLC_USE_PTHREAD 1
+# define LIBVLC_USE_PTHREAD_CLEANUP 1
+# define LIBVLC_USE_PTHREAD_CANCEL 1
-/*****************************************************************************
- * Type definitions
- *****************************************************************************/
+typedef pthread_t vlc_thread_t;
+typedef pthread_mutex_t vlc_mutex_t;
+#define VLC_STATIC_MUTEX PTHREAD_MUTEX_INITIALIZER
+typedef struct
+{
+ pthread_cond_t cond;
+ unsigned clock;
+} vlc_cond_t;
+#define VLC_STATIC_COND { PTHREAD_COND_INITIALIZER, 0 }
+typedef semaphore_t vlc_sem_t;
+typedef pthread_rwlock_t vlc_rwlock_t;
+#define VLC_STATIC_RWLOCK PTHREAD_RWLOCK_INITIALIZER
+typedef pthread_key_t vlc_threadvar_t;
+typedef struct vlc_timer *vlc_timer_t;
+
+# define VLC_THREAD_PRIORITY_LOW 0
+# define VLC_THREAD_PRIORITY_INPUT 22
+# define VLC_THREAD_PRIORITY_AUDIO 22
+# define VLC_THREAD_PRIORITY_VIDEO 0
+# define VLC_THREAD_PRIORITY_OUTPUT 22
+# define VLC_THREAD_PRIORITY_HIGHEST 22
+
+#else /* POSIX threads */
+# include <unistd.h> /* _POSIX_SPIN_LOCKS */
+# include <pthread.h>
+# include <semaphore.h>
+# define LIBVLC_USE_PTHREAD 1
+# define LIBVLC_USE_PTHREAD_CLEANUP 1
+# define LIBVLC_USE_PTHREAD_CANCEL 1
-#if defined (LIBVLC_USE_PTHREAD)
typedef pthread_t vlc_thread_t;
typedef pthread_mutex_t vlc_mutex_t;
+#define VLC_STATIC_MUTEX PTHREAD_MUTEX_INITIALIZER
typedef pthread_cond_t vlc_cond_t;
+#define VLC_STATIC_COND PTHREAD_COND_INITIALIZER
+typedef sem_t vlc_sem_t;
+typedef pthread_rwlock_t vlc_rwlock_t;
+#define VLC_STATIC_RWLOCK PTHREAD_RWLOCK_INITIALIZER
typedef pthread_key_t vlc_threadvar_t;
+typedef struct vlc_timer *vlc_timer_t;
-#elif defined( WIN32 )
-typedef struct
-{
- HANDLE handle;
- void *(*entry) (void *);
- void *data;
-} *vlc_thread_t;
+# define VLC_THREAD_PRIORITY_LOW 0
+# define VLC_THREAD_PRIORITY_INPUT 10
+# define VLC_THREAD_PRIORITY_AUDIO 5
+# define VLC_THREAD_PRIORITY_VIDEO 0
+# define VLC_THREAD_PRIORITY_OUTPUT 15
+# define VLC_THREAD_PRIORITY_HIGHEST 20
-typedef struct
-{
- CRITICAL_SECTION mutex;
- LONG owner;
- unsigned recursion;
- bool recursive;
-}
-vlc_mutex_t;
-typedef HANDLE vlc_cond_t;
-typedef DWORD vlc_threadvar_t;
+#endif
+#ifdef LIBVLC_NEED_SEMAPHORE
+typedef struct vlc_sem
+{
+ vlc_mutex_t lock;
+ vlc_cond_t wait;
+ unsigned value;
+} vlc_sem_t;
#endif
-#if defined( WIN32 ) && !defined ETIMEDOUT
-# define ETIMEDOUT 10060 /* This is the value in winsock.h. */
+#ifdef LIBVLC_NEED_RWLOCK
+typedef struct vlc_rwlock
+{
+ vlc_mutex_t mutex;
+ vlc_cond_t wait;
+ long state;
+} vlc_rwlock_t;
+# define VLC_STATIC_RWLOCK { VLC_STATIC_MUTEX, VLC_STATIC_COND, 0 }
#endif
/*****************************************************************************
* Function definitions
*****************************************************************************/
-VLC_EXPORT( int, vlc_mutex_init, ( vlc_mutex_t * ) );
-VLC_EXPORT( int, vlc_mutex_init_recursive, ( vlc_mutex_t * ) );
-VLC_EXPORT( void, vlc_mutex_destroy, ( vlc_mutex_t * ) );
-VLC_EXPORT( void, vlc_mutex_lock, ( vlc_mutex_t * ) );
-VLC_EXPORT( void, vlc_mutex_unlock, ( vlc_mutex_t * ) );
-VLC_EXPORT( int, vlc_cond_init, ( vlc_cond_t * ) );
-VLC_EXPORT( void, vlc_cond_destroy, ( vlc_cond_t * ) );
-VLC_EXPORT( void, vlc_cond_signal, (vlc_cond_t *) );
-VLC_EXPORT( void, vlc_cond_broadcast, (vlc_cond_t *) );
-VLC_EXPORT( void, vlc_cond_wait, (vlc_cond_t *, vlc_mutex_t *) );
-VLC_EXPORT( int, vlc_cond_timedwait, (vlc_cond_t *, vlc_mutex_t *, mtime_t) );
-VLC_EXPORT( int, vlc_threadvar_create, (vlc_threadvar_t * , void (*) (void *) ) );
-VLC_EXPORT( void, vlc_threadvar_delete, (vlc_threadvar_t *) );
-VLC_EXPORT( int, __vlc_thread_create, ( vlc_object_t *, const char *, int, const char *, void * ( * ) ( vlc_object_t * ), int, bool ) );
-VLC_EXPORT( int, __vlc_thread_set_priority, ( vlc_object_t *, const char *, int, int ) );
-VLC_EXPORT( void, __vlc_thread_join, ( vlc_object_t * ) );
-
-VLC_EXPORT( int, vlc_clone, (vlc_thread_t *, void * (*) (void *), void *, int) );
-VLC_EXPORT( void, vlc_cancel, (vlc_thread_t) );
-VLC_EXPORT( void, vlc_join, (vlc_thread_t, void **) );
-VLC_EXPORT (void, vlc_control_cancel, (int cmd, ...));
-
-#ifndef LIBVLC_USE_PTHREAD_CANCEL
-enum {
- VLC_SAVE_CANCEL,
- VLC_RESTORE_CANCEL,
- VLC_TEST_CANCEL,
- VLC_DO_CANCEL,
- VLC_CLEANUP_PUSH,
- VLC_CLEANUP_POP,
-};
-#endif
-
-#define vlc_thread_ready vlc_object_signal
-
-/**
- * Save the cancellation state and disable cancellation for the calling thread.
- * This function must be called before entering a piece of code that is not
- * cancellation-safe.
- * @return Previous cancellation state (opaque value).
+VLC_API void vlc_mutex_init( vlc_mutex_t * );
+VLC_API void vlc_mutex_init_recursive( vlc_mutex_t * );
+VLC_API void vlc_mutex_destroy( vlc_mutex_t * );
+VLC_API void vlc_mutex_lock( vlc_mutex_t * );
+VLC_API int vlc_mutex_trylock( vlc_mutex_t * ) VLC_USED;
+VLC_API void vlc_mutex_unlock( vlc_mutex_t * );
+VLC_API void vlc_cond_init( vlc_cond_t * );
+VLC_API void vlc_cond_init_daytime( vlc_cond_t * );
+VLC_API void vlc_cond_destroy( vlc_cond_t * );
+VLC_API void vlc_cond_signal(vlc_cond_t *);
+VLC_API void vlc_cond_broadcast(vlc_cond_t *);
+VLC_API void vlc_cond_wait(vlc_cond_t *, vlc_mutex_t *);
+VLC_API int vlc_cond_timedwait(vlc_cond_t *, vlc_mutex_t *, mtime_t);
+VLC_API void vlc_sem_init(vlc_sem_t *, unsigned);
+VLC_API void vlc_sem_destroy(vlc_sem_t *);
+VLC_API int vlc_sem_post(vlc_sem_t *);
+VLC_API void vlc_sem_wait(vlc_sem_t *);
+
+VLC_API void vlc_rwlock_init(vlc_rwlock_t *);
+VLC_API void vlc_rwlock_destroy(vlc_rwlock_t *);
+VLC_API void vlc_rwlock_rdlock(vlc_rwlock_t *);
+VLC_API void vlc_rwlock_wrlock(vlc_rwlock_t *);
+VLC_API void vlc_rwlock_unlock(vlc_rwlock_t *);
+VLC_API int vlc_threadvar_create(vlc_threadvar_t * , void (*) (void *) );
+VLC_API void vlc_threadvar_delete(vlc_threadvar_t *);
+VLC_API int vlc_threadvar_set(vlc_threadvar_t, void *);
+VLC_API void * vlc_threadvar_get(vlc_threadvar_t);
+
+VLC_API int vlc_clone(vlc_thread_t *, void * (*) (void *), void *, int) VLC_USED;
+VLC_API void vlc_cancel(vlc_thread_t);
+VLC_API void vlc_join(vlc_thread_t, void **);
+VLC_API void vlc_control_cancel (int cmd, ...);
+
+VLC_API mtime_t mdate(void);
+VLC_API void mwait(mtime_t deadline);
+VLC_API void msleep(mtime_t delay);
+
+#define VLC_HARD_MIN_SLEEP 10000 /* 10 milliseconds = 1 tick at 100Hz */
+#define VLC_SOFT_MIN_SLEEP 9000000 /* 9 seconds */
+
+#if VLC_GCC_VERSION(4,3)
+/* Linux has 100, 250, 300 or 1000Hz
+ *
+ * HZ=100 by default on FreeBSD, but some architectures use a 1000Hz timer
*/
-static inline int vlc_savecancel (void)
+
+static
+__attribute__((unused))
+__attribute__((noinline))
+__attribute__((error("sorry, cannot sleep for such short a time")))
+mtime_t impossible_delay( mtime_t delay )
{
- int state;
-#if defined (LIBVLC_USE_PTHREAD_CANCEL)
- (void) pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &state);
-#else
- vlc_control_cancel (VLC_SAVE_CANCEL, &state);
-#endif
- return state;
+ (void) delay;
+ return VLC_HARD_MIN_SLEEP;
}
-/**
- * Restore the cancellation state for the calling thread.
- * @param state previous state as returned by vlc_savecancel().
- * @return Nothing, always succeeds.
- */
-static inline void vlc_restorecancel (int state)
+static
+__attribute__((unused))
+__attribute__((noinline))
+__attribute__((warning("use proper event handling instead of short delay")))
+mtime_t harmful_delay( mtime_t delay )
{
-#if defined (LIBVLC_USE_PTHREAD_CANCEL)
- (void) pthread_setcancelstate (state, NULL);
-#else
- vlc_control_cancel (VLC_RESTORE_CANCEL, state);
-#endif
+ return delay;
}
-/**
- * Issues an explicit deferred cancellation point.
- * This has no effect if thread cancellation is disabled.
- * This can be called when there is a rather slow non-sleeping operation.
- */
-static inline void vlc_testcancel (void)
+# define check_delay( d ) \
+ ((__builtin_constant_p(d < VLC_HARD_MIN_SLEEP) \
+ && (d < VLC_HARD_MIN_SLEEP)) \
+ ? impossible_delay(d) \
+ : ((__builtin_constant_p(d < VLC_SOFT_MIN_SLEEP) \
+ && (d < VLC_SOFT_MIN_SLEEP)) \
+ ? harmful_delay(d) \
+ : d))
+
+static
+__attribute__((unused))
+__attribute__((noinline))
+__attribute__((error("deadlines can not be constant")))
+mtime_t impossible_deadline( mtime_t deadline )
{
-#if defined (LIBVLC_USE_PTHREAD_CANCEL)
- pthread_testcancel ();
+ return deadline;
+}
+
+# define check_deadline( d ) \
+ (__builtin_constant_p(d) ? impossible_deadline(d) : d)
#else
- vlc_control_cancel (VLC_TEST_CANCEL);
+# define check_delay(d) (d)
+# define check_deadline(d) (d)
#endif
-}
-#if defined (LIBVLC_USE_PTHREAD_CANCEL)
+#define msleep(d) msleep(check_delay(d))
+#define mwait(d) mwait(check_deadline(d))
+
+VLC_API int vlc_timer_create(vlc_timer_t *, void (*) (void *), void *) VLC_USED;
+VLC_API void vlc_timer_destroy(vlc_timer_t);
+VLC_API void vlc_timer_schedule(vlc_timer_t, bool, mtime_t, mtime_t);
+VLC_API unsigned vlc_timer_getoverrun(vlc_timer_t) VLC_USED;
+
+VLC_API unsigned vlc_GetCPUCount(void);
+
+VLC_API int vlc_savecancel(void);
+VLC_API void vlc_restorecancel(int state);
+VLC_API void vlc_testcancel(void);
+
+#if defined (LIBVLC_USE_PTHREAD_CLEANUP)
/**
* Registers a new procedure to run if the thread is cancelled (or otherwise
* exits prematurely). Any call to vlc_cleanup_push() <b>must</b> paired with a
* vlc_cleanup_push(), and executes it.
*/
# define vlc_cleanup_run( ) pthread_cleanup_pop (1)
+
#else
+enum
+{
+ VLC_CLEANUP_PUSH,
+ VLC_CLEANUP_POP,
+};
typedef struct vlc_cleanup_t vlc_cleanup_t;
struct vlc_cleanup_t
};
/* This macros opens a code block on purpose. This is needed for multiple
- * calls within a single function. This also prevent Win32 developpers from
+ * calls within a single function. This also prevent Win32 developers from
* writing code that would break on POSIX (POSIX opens a block as well). */
# define vlc_cleanup_push( routine, arg ) \
do { \
vlc_cleanup_data.proc (vlc_cleanup_data.data); \
} while (0)
-#endif /* LIBVLC_USE_PTHREAD_CANCEL */
+#endif /* !LIBVLC_USE_PTHREAD_CLEANUP */
-static inline void vlc_cleanup_lock (void *lock)
-{
- vlc_mutex_unlock ((vlc_mutex_t *)lock);
-}
-#define mutex_cleanup_push( lock ) vlc_cleanup_push (vlc_cleanup_lock, lock)
-
-/*****************************************************************************
- * 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 )
+#ifndef LIBVLC_USE_PTHREAD_CANCEL
+/* poll() with cancellation */
+# ifdef __OS2__
+static inline int vlc_poll (struct pollfd *fds, unsigned nfds, int timeout)
{
- int i_ret;
+ static int (*vlc_poll_os2)(struct pollfd *, unsigned, int) = NULL;
-#if defined(LIBVLC_USE_PTHREAD)
- i_ret = pthread_setspecific( *p_tls, p_value );
+ if (!vlc_poll_os2)
+ {
+ HMODULE hmod;
+ CHAR szFailed[CCHMAXPATH];
-#elif defined( UNDER_CE ) || defined( WIN32 )
- i_ret = TlsSetValue( *p_tls, p_value ) ? EINVAL : 0;
+ if (DosLoadModule(szFailed, sizeof(szFailed), "vlccore", &hmod))
+ return -1;
-#endif
+ if (DosQueryProcAddr(hmod, 0, "_vlc_poll_os2", (PFN *)&vlc_poll_os2))
+ return -1;
+ }
- return i_ret;
+ return (*vlc_poll_os2)(fds, nfds, timeout);
}
-
-/*****************************************************************************
- * vlc_threadvar_get: create: get the value of a thread-local variable
- *****************************************************************************/
-static inline void* vlc_threadvar_get( vlc_threadvar_t * p_tls )
+# else
+static inline int vlc_poll (struct pollfd *fds, unsigned nfds, int timeout)
{
- void *p_ret;
+ int val;
-#if defined(LIBVLC_USE_PTHREAD)
- p_ret = pthread_getspecific( *p_tls );
+ do
+ {
+ int ugly_timeout = ((unsigned)timeout >= 50) ? 50 : timeout;
+ if (timeout >= 0)
+ timeout -= ugly_timeout;
-#elif defined( UNDER_CE ) || defined( WIN32 )
- p_ret = TlsGetValue( *p_tls );
+ vlc_testcancel ();
+ val = poll (fds, nfds, ugly_timeout);
+ }
+ while (val == 0 && timeout != 0);
-#endif
-
- return p_ret;
+ return val;
}
+# endif
-# if defined (_POSIX_SPIN_LOCKS) && ((_POSIX_SPIN_LOCKS - 0) > 0)
-typedef pthread_spinlock_t vlc_spinlock_t;
-
-/**
- * Initializes a spinlock.
- */
-static inline int vlc_spin_init (vlc_spinlock_t *spin)
-{
- return pthread_spin_init (spin, PTHREAD_PROCESS_PRIVATE);
-}
-
-/**
- * Acquires a spinlock.
- */
-static inline void vlc_spin_lock (vlc_spinlock_t *spin)
-{
- pthread_spin_lock (spin);
-}
-
-/**
- * Releases a spinlock.
- */
-static inline void vlc_spin_unlock (vlc_spinlock_t *spin)
-{
- pthread_spin_unlock (spin);
-}
-
-/**
- * Deinitializes a spinlock.
- */
-static inline void vlc_spin_destroy (vlc_spinlock_t *spin)
-{
- pthread_spin_destroy (spin);
-}
-
-#elif defined( WIN32 )
-
-typedef CRITICAL_SECTION vlc_spinlock_t;
-
-/**
- * Initializes a spinlock.
- */
-static inline int vlc_spin_init (vlc_spinlock_t *spin)
-{
-#ifdef UNDER_CE
- InitializeCriticalSection(spin);
- return 0;
-#else
- return !InitializeCriticalSectionAndSpinCount(spin, 4000);
-#endif
-}
+# define poll(u,n,t) vlc_poll(u, n, t)
-/**
- * Acquires a spinlock.
- */
-static inline void vlc_spin_lock (vlc_spinlock_t *spin)
-{
- EnterCriticalSection(spin);
-}
+#endif /* LIBVLC_USE_PTHREAD_CANCEL */
-/**
- * Releases a spinlock.
- */
-static inline void vlc_spin_unlock (vlc_spinlock_t *spin)
+static inline void vlc_cleanup_lock (void *lock)
{
- LeaveCriticalSection(spin);
+ vlc_mutex_unlock ((vlc_mutex_t *)lock);
}
+#define mutex_cleanup_push( lock ) vlc_cleanup_push (vlc_cleanup_lock, lock)
+#ifdef __cplusplus
/**
- * Deinitializes a spinlock.
+ * Helper C++ class to lock a mutex.
+ * The mutex is locked when the object is created, and unlocked when the object
+ * is destroyed.
*/
-static inline void vlc_spin_destroy (vlc_spinlock_t *spin)
-{
- DeleteCriticalSection(spin);
-}
-
-#else
-
-/* Fallback to plain mutexes if spinlocks are not available */
-typedef vlc_mutex_t vlc_spinlock_t;
-
-static inline int vlc_spin_init (vlc_spinlock_t *spin)
+class vlc_mutex_locker
{
- return vlc_mutex_init (spin);
-}
-
-# define vlc_spin_lock vlc_mutex_lock
-# define vlc_spin_unlock vlc_mutex_unlock
-# define vlc_spin_destroy vlc_mutex_destroy
+ private:
+ vlc_mutex_t *lock;
+ public:
+ vlc_mutex_locker (vlc_mutex_t *m) : lock (m)
+ {
+ vlc_mutex_lock (lock);
+ }
+
+ ~vlc_mutex_locker (void)
+ {
+ vlc_mutex_unlock (lock);
+ }
+};
#endif
-/**
- * Issues a full memory barrier.
- */
-#if defined (__APPLE__)
-# include <libkern/OSAtomic.h> /* OSMemoryBarrier() */
-#endif
-static inline void barrier (void)
+enum
{
-#if defined (__GNUC__) && \
- ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1))
- __sync_synchronize ();
-#elif defined(__APPLE__)
- OSMemoryBarrier ();
-#elif defined(__powerpc__)
- asm volatile ("sync":::"memory");
-#elif 0 // defined(__i386__) /* Requires SSE2 support */
- asm volatile ("mfence":::"memory");
-#else
- vlc_spinlock_t spin;
- vlc_spin_init (&spin);
- vlc_spin_lock (&spin);
- vlc_spin_unlock (&spin);
- vlc_spin_destroy (&spin);
-#endif
-}
-
-/*****************************************************************************
- * vlc_thread_create: create a thread
- *****************************************************************************/
-#define vlc_thread_create( P_THIS, PSZ_NAME, FUNC, PRIORITY, WAIT ) \
- __vlc_thread_create( VLC_OBJECT(P_THIS), __FILE__, __LINE__, PSZ_NAME, FUNC, PRIORITY, WAIT )
-
-/*****************************************************************************
- * vlc_thread_set_priority: set the priority of the calling thread
- *****************************************************************************/
-#define vlc_thread_set_priority( P_THIS, PRIORITY ) \
- __vlc_thread_set_priority( VLC_OBJECT(P_THIS), __FILE__, __LINE__, PRIORITY )
+ VLC_AVCODEC_MUTEX = 0,
+ VLC_GCRYPT_MUTEX,
+ VLC_XLIB_MUTEX,
+ VLC_MOSAIC_MUTEX,
+ VLC_HIGHLIGHT_MUTEX,
+ VLC_ATOMIC_MUTEX,
+ /* Insert new entry HERE */
+ VLC_MAX_MUTEX
+};
-/*****************************************************************************
- * vlc_thread_join: wait until a thread exits
- *****************************************************************************/
-#define vlc_thread_join( P_THIS ) \
- __vlc_thread_join( VLC_OBJECT(P_THIS) )
+VLC_API void vlc_global_mutex( unsigned, bool );
+#define vlc_global_lock( n ) vlc_global_mutex( n, true )
+#define vlc_global_unlock( n ) vlc_global_mutex( n, false )
#endif /* !_VLC_THREADS_H */
projects / vlc / blobdiff