* 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 )
-#elif defined( WIN32 )
-# include <process.h> /* Win32 API */
-
-#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 <unistd.h> /* _POSIX_SPIN_LOCKS */
-# include <pthread.h>
-
-/* Unnamed POSIX semaphores not supported on Mac OS X, use Mach semaphores instead */
-# if defined (__APPLE__)
-# include <mach/semaphore.h>
-# include <mach/task.h>
-# else
-# include <semaphore.h>
-# endif
-
-#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
-
-#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
-
-#endif
-
-/*****************************************************************************
- * Type definitions
- *****************************************************************************/
+#if defined (_WIN32)
+# include <process.h>
+# ifndef ETIMEDOUT
+# define ETIMEDOUT 10060 /* This is the value in winsock.h. */
+# endif
-#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 pthread_rwlock_t vlc_rwlock_t;
-typedef pthread_key_t vlc_threadvar_t;
+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;
-#if defined (__APPLE__)
-typedef semaphore_t vlc_sem_t;
-#else
-typedef sem_t vlc_sem_t;
-#endif
+# 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( WIN32 )
-typedef struct vlc_thread *vlc_thread_t;
+#elif defined (__OS2__)
+# include <errno.h>
+typedef struct vlc_thread *vlc_thread_t;
typedef struct
{
bool dynamic;
bool locked;
unsigned long contention;
};
- CRITICAL_SECTION mutex;
+ 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
{
- HANDLE handle;
+ pthread_cond_t cond;
unsigned clock;
} vlc_cond_t;
+#define VLC_STATIC_COND { PTHREAD_COND_INITIALIZER, CLOCK_REALTIME }
-typedef HANDLE vlc_sem_t;
+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
+typedef pthread_t vlc_thread_t;
+typedef pthread_mutex_t vlc_mutex_t;
+#define VLC_STATIC_MUTEX PTHREAD_MUTEX_INITIALIZER
typedef struct
{
- vlc_mutex_t mutex;
- vlc_cond_t read_wait;
- vlc_cond_t write_wait;
- unsigned long readers;
- unsigned long writers;
- DWORD writer;
-} vlc_rwlock_t;
+ 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;
-typedef struct vlc_threadvar *vlc_threadvar_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
+
+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;
+
+# 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
+
#endif
-#if defined( WIN32 ) && !defined ETIMEDOUT
-# define ETIMEDOUT 10060 /* This is the value in winsock.h. */
+#ifdef LIBVLC_NEED_SEMAPHORE
+typedef struct vlc_sem
+{
+ vlc_mutex_t lock;
+ vlc_cond_t wait;
+ unsigned value;
+} vlc_sem_t;
+#endif
+
+#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
/*****************************************************************************
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
+__attribute__((unused))
+__attribute__((noinline))
+__attribute__((error("sorry, cannot sleep for such short a time")))
+mtime_t impossible_delay( mtime_t delay )
+{
+ (void) delay;
+ return VLC_HARD_MIN_SLEEP;
+}
+
+static
+__attribute__((unused))
+__attribute__((noinline))
+__attribute__((warning("use proper event handling instead of short delay")))
+mtime_t harmful_delay( mtime_t delay )
+{
+ return delay;
+}
+
+# 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 )
+{
+ return deadline;
+}
+
+# define check_deadline( d ) \
+ (__builtin_constant_p(d) ? impossible_deadline(d) : d)
+#else
+# define check_delay(d) (d)
+# define check_deadline(d) (d)
+#endif
+
+#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_GetCPUCount(void);
-#ifndef LIBVLC_USE_PTHREAD_CANCEL
-enum {
- VLC_CLEANUP_PUSH,
- VLC_CLEANUP_POP,
-};
-#endif
-
VLC_API int vlc_savecancel(void);
VLC_API void vlc_restorecancel(int state);
VLC_API void vlc_testcancel(void);
-#if defined (LIBVLC_USE_PTHREAD_CANCEL)
+#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
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)
+#ifndef LIBVLC_USE_PTHREAD_CANCEL
+/* poll() with cancellation */
+# ifdef __OS2__
+static inline int vlc_poll (struct pollfd *fds, unsigned nfds, int timeout)
{
- vlc_mutex_unlock ((vlc_mutex_t *)lock);
-}
-#define mutex_cleanup_push( lock ) vlc_cleanup_push (vlc_cleanup_lock, lock)
+ static int (*vlc_poll_os2)(struct pollfd *, unsigned, int) = NULL;
-# if defined (_POSIX_SPIN_LOCKS) && ((_POSIX_SPIN_LOCKS - 0) > 0)
-typedef pthread_spinlock_t vlc_spinlock_t;
+ if (!vlc_poll_os2)
+ {
+ HMODULE hmod;
+ CHAR szFailed[CCHMAXPATH];
-/**
- * Initializes a spinlock.
- */
-static inline void vlc_spin_init (vlc_spinlock_t *spin)
-{
- if (pthread_spin_init (spin, PTHREAD_PROCESS_PRIVATE))
- abort ();
-}
+ if (DosLoadModule(szFailed, sizeof(szFailed), "vlccore", &hmod))
+ return -1;
-/**
- * Acquires a spinlock.
- */
-static inline void vlc_spin_lock (vlc_spinlock_t *spin)
-{
- pthread_spin_lock (spin);
-}
+ if (DosQueryProcAddr(hmod, 0, "_vlc_poll_os2", (PFN *)&vlc_poll_os2))
+ return -1;
+ }
-/**
- * Releases a spinlock.
- */
-static inline void vlc_spin_unlock (vlc_spinlock_t *spin)
-{
- pthread_spin_unlock (spin);
+ return (*vlc_poll_os2)(fds, nfds, timeout);
}
-
-/**
- * Deinitializes a spinlock.
- */
-static inline void vlc_spin_destroy (vlc_spinlock_t *spin)
+# else
+static inline int vlc_poll (struct pollfd *fds, unsigned nfds, int timeout)
{
- pthread_spin_destroy (spin);
-}
+ int val;
-#elif defined (WIN32) && !defined (UNDER_CE)
+ do
+ {
+ int ugly_timeout = ((unsigned)timeout >= 50) ? 50 : timeout;
+ if (timeout >= 0)
+ timeout -= ugly_timeout;
-typedef CRITICAL_SECTION vlc_spinlock_t;
+ vlc_testcancel ();
+ val = poll (fds, nfds, ugly_timeout);
+ }
+ while (val == 0 && timeout != 0);
-/**
- * Initializes a spinlock.
- */
-static inline void vlc_spin_init (vlc_spinlock_t *spin)
-{
- if (!InitializeCriticalSectionAndSpinCount(spin, 4000))
- abort ();
+ return val;
}
+# endif
-/**
- * Acquires a spinlock.
- */
-static inline void vlc_spin_lock (vlc_spinlock_t *spin)
-{
- EnterCriticalSection(spin);
-}
-
-/**
- * Releases a spinlock.
- */
-static inline void vlc_spin_unlock (vlc_spinlock_t *spin)
-{
- LeaveCriticalSection(spin);
-}
+# define poll(u,n,t) vlc_poll(u, n, t)
-/**
- * Deinitializes a spinlock.
- */
-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 void vlc_spin_init (vlc_spinlock_t *spin)
-{
- 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
-#endif
+#endif /* LIBVLC_USE_PTHREAD_CANCEL */
-/**
- * Issues a full memory barrier.
- */
-#if defined (__APPLE__)
-# include <libkern/OSAtomic.h> /* OSMemoryBarrier() */
-#endif
-static inline void barrier (void)
+static inline void vlc_cleanup_lock (void *lock)
{
-#if defined (__GNUC__) && !defined (__APPLE__) && \
- ((__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_mutex_unlock ((vlc_mutex_t *)lock);
}
+#define mutex_cleanup_push( lock ) vlc_cleanup_push (vlc_cleanup_lock, lock)
#ifdef __cplusplus
/**
};
#endif
-enum {
+enum
+{
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
};
projects / vlc / blobdiff