* Gildas Bazin <gbazin@netcourrier.com>
* Clément Sténac
* Rémi Denis-Courmont
+ * Pierre Ynard
*
* 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
#include "libvlc.h"
#include <stdarg.h>
#include <assert.h>
+#include <limits.h>
+#ifdef UNDER_CE
+# include <mmsystem.h>
+#endif
static vlc_threadvar_t cancel_key;
#ifndef UNDER_CE
# define VLC_CANCEL_INIT { NULL, true, false }
#else
-# define VLC_CANCEL_INIT { NULL, NULL; true, false }
+# define VLC_CANCEL_INIT { NULL, NULL, true, false }
#endif
#ifdef UNDER_CE
* no defined behavior in case of recursive locking. */
InitializeCriticalSection (&p_mutex->mutex);
p_mutex->initialized = 1;
- return 0;
}
void vlc_mutex_init_recursive( vlc_mutex_t *p_mutex )
{
InitializeCriticalSection( &p_mutex->mutex );
p_mutex->initialized = 1;
- return 0;
}
return (result == WAIT_OBJECT_0) ? 0 : ETIMEDOUT;
}
+/*** Read/write locks */
+/* SRW (Slim Read Write) locks are available in Vista+ only */
+void vlc_rwlock_init (vlc_rwlock_t *lock)
+{
+ vlc_mutex_init (&lock->mutex);
+ vlc_cond_init (&lock->read_wait);
+ vlc_cond_init (&lock->write_wait);
+ lock->readers = 0; /* active readers */
+ lock->writers = 0; /* waiting or active writers */
+ lock->writer = 0; /* ID of active writer */
+}
+
+/**
+ * Destroys an initialized unused read/write lock.
+ */
+void vlc_rwlock_destroy (vlc_rwlock_t *lock)
+{
+ vlc_cond_destroy (&lock->read_wait);
+ vlc_cond_destroy (&lock->write_wait);
+ vlc_mutex_destroy (&lock->mutex);
+}
+
+/**
+ * Acquires a read/write lock for reading. Recursion is allowed.
+ */
+void vlc_rwlock_rdlock (vlc_rwlock_t *lock)
+{
+ vlc_mutex_lock (&lock->mutex);
+ while (lock->writer != 0)
+ vlc_cond_wait (&lock->read_wait, &lock->mutex);
+ if (lock->readers == ULONG_MAX)
+ abort ();
+ lock->readers++;
+ vlc_mutex_unlock (&lock->mutex);
+}
+
+/**
+ * Acquires a read/write lock for writing. Recursion is not allowed.
+ */
+void vlc_rwlock_wrlock (vlc_rwlock_t *lock)
+{
+ vlc_mutex_lock (&lock->mutex);
+ if (lock->writers == ULONG_MAX)
+ abort ();
+ lock->writers++;
+ while ((lock->readers > 0) || (lock->writer != 0))
+ vlc_cond_wait (&lock->write_wait, &lock->mutex);
+ lock->writers--;
+ lock->writer = GetCurrentThreadId ();
+ vlc_mutex_unlock (&lock->mutex);
+}
+
+/**
+ * Releases a read/write lock.
+ */
+void vlc_rwlock_unlock (vlc_rwlock_t *lock)
+{
+ vlc_mutex_lock (&lock->mutex);
+ if (lock->readers > 0)
+ lock->readers--; /* Read unlock */
+ else
+ lock->writer = 0; /* Write unlock */
+
+ if (lock->writers > 0)
+ {
+ if (lock->readers == 0)
+ vlc_cond_signal (&lock->write_wait);
+ }
+ else
+ vlc_cond_broadcast (&lock->read_wait);
+ vlc_mutex_unlock (&lock->mutex);
+}
+
/*** Thread-specific variables (TLS) ***/
int vlc_threadvar_create (vlc_threadvar_t *p_tls, void (*destr) (void *))
{
/*** Threads ***/
-static unsigned __stdcall vlc_entry (void *data)
+void vlc_threads_setup (libvlc_int_t *p_libvlc)
+{
+ (void) p_libvlc;
+}
+
+struct vlc_entry_data
+{
+ void * (*func) (void *);
+ void * data;
+#ifdef UNDER_CE
+ HANDLE cancel_event;
+#endif
+};
+
+static unsigned __stdcall vlc_entry (void *p)
{
vlc_cancel_t cancel_data = VLC_CANCEL_INIT;
- vlc_thread_t self = data;
+ struct vlc_entry_data data;
+
+ memcpy (&data, p, sizeof (data));
+ free (p);
+
#ifdef UNDER_CE
- cancel_data.cancel_event = self->cancel_event;
+ cancel_data.cancel_event = data.cancel_event;
#endif
vlc_threadvar_set (cancel_key, &cancel_data);
- self->data = self->entry (self->data);
+ data.func (data.data);
return 0;
}
int vlc_clone (vlc_thread_t *p_handle, void * (*entry) (void *), void *data,
int priority)
{
+ int err = ENOMEM;
+ HANDLE hThread;
+
+ struct vlc_entry_data *entry_data = malloc (sizeof (*entry_data));
+ if (entry_data == NULL)
+ return ENOMEM;
+ entry_data->func = entry;
+ entry_data->data = data;
+
+#ifndef 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) */
- HANDLE hThread;
- vlc_thread_t th = malloc (sizeof (*th));
+ hThread = (HANDLE)(uintptr_t)
+ _beginthreadex (NULL, 0, vlc_entry, entry_data, CREATE_SUSPENDED, NULL);
+ if (! hThread)
+ {
+ err = errno;
+ goto error;
+ }
- if (th == NULL)
- return ENOMEM;
+ /* Thread closes the handle when exiting, duplicate it here
+ * to be on the safe side when joining. */
+ if (!DuplicateHandle (GetCurrentProcess (), hThread,
+ GetCurrentProcess (), p_handle, 0, FALSE,
+ DUPLICATE_SAME_ACCESS))
+ {
+ CloseHandle (hThread);
+ goto error;
+ }
- th->data = data;
- th->entry = entry;
-#if defined( UNDER_CE )
+#else
+ vlc_thread_t th = malloc (sizeof (*th));
+ if (th == NULL)
+ goto error;
th->cancel_event = CreateEvent (NULL, FALSE, FALSE, NULL);
if (th->cancel_event == NULL)
{
- free(th);
- return errno;
+ free (th);
+ goto error;
}
- hThread = CreateThread (NULL, 128*1024, vlc_entry, th, CREATE_SUSPENDED, NULL);
-#else
- hThread = (HANDLE)(uintptr_t)
- _beginthreadex (NULL, 0, vlc_entry, th, CREATE_SUSPENDED, NULL);
-#endif
+ entry_data->cancel_event = th->cancel_event;
- if (hThread)
+ /* Not sure if CREATE_SUSPENDED + ResumeThread() is any useful on WinCE.
+ * Thread handles act up, too. */
+ th->handle = CreateThread (NULL, 128*1024, vlc_entry, entry_data,
+ CREATE_SUSPENDED, NULL);
+ if (th->handle == NULL)
{
-#ifndef UNDER_CE
- /* Thread closes the handle when exiting, duplicate it here
- * to be on the safe side when joining. */
- if (!DuplicateHandle (GetCurrentProcess (), hThread,
- GetCurrentProcess (), &th->handle, 0, FALSE,
- DUPLICATE_SAME_ACCESS))
- {
- CloseHandle (hThread);
- free (th);
- return ENOMEM;
- }
-#else
- th->handle = hThread;
+ CloseHandle (th->cancel_event);
+ free (th);
+ goto error;
+ }
+
+ *p_handle = th;
+ hThread = th->handle;
+
#endif
- ResumeThread (hThread);
- if (priority)
- SetThreadPriority (hThread, priority);
+ ResumeThread (hThread);
+ if (priority)
+ SetThreadPriority (hThread, priority);
- *p_handle = th;
- return 0;
- }
- free (th);
- return errno;
+ return 0;
+
+error:
+ free (entry_data);
+ return err;
}
void vlc_join (vlc_thread_t handle, void **result)
{
+#ifdef UNDER_CE
+# define handle handle->handle
+#endif
do
vlc_testcancel ();
- while (WaitForSingleObjectEx (handle->handle, INFINITE, TRUE)
+ while (WaitForSingleObjectEx (handle, INFINITE, TRUE)
== WAIT_IO_COMPLETION);
- CloseHandle (handle->handle);
- if (result)
- *result = handle->data;
+ CloseHandle (handle);
+ assert (result == NULL); /* <- FIXME if ever needed */
#ifdef UNDER_CE
+# undef handle
CloseHandle (handle->cancel_event);
-#endif
free (handle);
+#endif
}
+void vlc_detach (vlc_thread_t handle)
+{
+#ifndef UNDER_CE
+ CloseHandle (handle);
+#else
+ /* FIXME: handle->cancel_event leak */
+ CloseHandle (handle->handle);
+ free (handle);
+#endif
+}
/*** Thread cancellation ***/
void vlc_cancel (vlc_thread_t thread_id)
{
#ifndef UNDER_CE
- QueueUserAPC (vlc_cancel_self, thread_id->handle, 0);
+ QueueUserAPC (vlc_cancel_self, thread_id, 0);
#else
SetEvent (thread_id->cancel_event);
#endif
}
va_end (ap);
}
+
+
+/*** Timers ***/
+struct vlc_timer
+{
+#ifndef UNDER_CE
+ HANDLE handle;
+#else
+ unsigned id;
+ unsigned interval;
+#endif
+ void (*func) (void *);
+ void *data;
+};
+
+#ifndef UNDER_CE
+static void CALLBACK vlc_timer_do (void *val, BOOLEAN timeout)
+{
+ struct vlc_timer *timer = val;
+
+ assert (timeout);
+ timer->func (timer->data);
+}
+#else
+static void CALLBACK vlc_timer_do (unsigned timer_id, unsigned msg,
+ DWORD_PTR user, DWORD_PTR unused1,
+ DWORD_PTR unused2)
+{
+ struct vlc_timer *timer = (struct vlc_timer *) user;
+ assert (timer_id == timer->id);
+ (void) msg;
+ (void) unused1;
+ (void) unused2;
+
+ timer->func (timer->data);
+
+ if (timer->interval)
+ {
+ mtime_t interval = timer->interval * 1000;
+ vlc_timer_schedule (timer, false, interval, interval);
+ }
+}
+#endif
+
+int vlc_timer_create (vlc_timer_t *id, void (*func) (void *), void *data)
+{
+ struct vlc_timer *timer = malloc (sizeof (*timer));
+
+ if (timer == NULL)
+ return ENOMEM;
+ timer->func = func;
+ timer->data = data;
+#ifndef UNDER_CE
+ timer->handle = INVALID_HANDLE_VALUE;
+#else
+ timer->id = 0;
+ timer->interval = 0;
+#endif
+ *id = timer;
+ return 0;
+}
+
+void vlc_timer_destroy (vlc_timer_t timer)
+{
+#ifndef UNDER_CE
+ if (timer->handle != INVALID_HANDLE_VALUE)
+ DeleteTimerQueueTimer (NULL, timer->handle, INVALID_HANDLE_VALUE);
+#else
+ if (timer->id)
+ timeKillEvent (timer->id);
+ /* FIXME: timers that have not yet completed will trigger use-after-free */
+#endif
+ free (timer);
+}
+
+void vlc_timer_schedule (vlc_timer_t timer, bool absolute,
+ mtime_t value, mtime_t interval)
+{
+#ifndef UNDER_CE
+ if (timer->handle != INVALID_HANDLE_VALUE)
+ {
+ DeleteTimerQueueTimer (NULL, timer->handle, NULL);
+ timer->handle = INVALID_HANDLE_VALUE;
+ }
+#else
+ if (timer->id)
+ {
+ timeKillEvent (timer->id);
+ timer->id = 0;
+ timer->interval = 0;
+ }
+#endif
+ if (value == 0)
+ return; /* Disarm */
+
+ if (absolute)
+ value -= mdate ();
+ value = (value + 999) / 1000;
+ interval = (interval + 999) / 1000;
+
+#ifndef UNDER_CE
+ if (!CreateTimerQueueTimer (&timer->handle, NULL, vlc_timer_do, timer,
+ value, interval, WT_EXECUTEDEFAULT))
+#else
+ TIMECAPS caps;
+ timeGetDevCaps (&caps, sizeof(caps));
+
+ unsigned delay = value;
+ delay = __MAX(delay, caps.wPeriodMin);
+ delay = __MIN(delay, caps.wPeriodMax);
+
+ unsigned event = TIME_ONESHOT;
+
+ if (interval == delay)
+ event = TIME_PERIODIC;
+ else if (interval)
+ timer->interval = interval;
+
+ timer->id = timeSetEvent (delay, delay / 20, vlc_timer_do, (DWORD) timer,
+ event);
+ if (!timer->id)
+#endif
+ abort ();
+}
+
+unsigned vlc_timer_getoverrun (vlc_timer_t timer)
+{
+ (void)timer;
+ return 0;
+}
projects / vlc / blobdiff