#endif
#include <signal.h>
-#define VLC_THREADS_UNINITIALIZED 0
-#define VLC_THREADS_PENDING 1
-#define VLC_THREADS_ERROR 2
-#define VLC_THREADS_READY 3
-
-/*****************************************************************************
- * Global mutex for lazy initialization of the threads system
- *****************************************************************************/
-static volatile unsigned i_initializations = 0;
-
#if defined( LIBVLC_USE_PTHREAD )
# include <sched.h>
-
-static pthread_mutex_t once_mutex = PTHREAD_MUTEX_INITIALIZER;
#else
static vlc_threadvar_t cancel_key;
#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;
-}
-
#ifdef HAVE_EXECINFO_H
# include <execinfo.h>
#endif
#ifdef __GLIBC__
/* Avoid the strerror_r() prototype brain damage in glibc */
errno = error;
- fprintf (stderr, " Error message: %m at:\n");
+ fprintf (stderr, " Error message: %m\n");
#elif !defined (WIN32)
char buf[1000];
const char *msg;
vlc_cleanup_t *cleaners;
bool killable;
bool killed;
+# ifdef UNDER_CE
+ HANDLE cancel_event;
+# endif
} vlc_cancel_t;
-# define VLC_CANCEL_INIT { NULL, true, false }
+# ifndef UNDER_CE
+# define VLC_CANCEL_INIT { NULL, true, false }
+# else
+# define VLC_CANCEL_INIT { NULL, true, false, NULL }
+# endif
#endif
-/*****************************************************************************
- * vlc_threads_init: initialize threads system
- *****************************************************************************
- * This function requires lazy initialization of a global lock in order to
- * keep the library really thread-safe. Some architectures don't support this
- * and thus do not guarantee the complete reentrancy.
- *****************************************************************************/
-int vlc_threads_init( void )
-{
- int i_ret = VLC_SUCCESS;
-
- /* If we have lazy mutex initialization, use it. Otherwise, we just
- * hope nothing wrong happens. */
-#if defined( LIBVLC_USE_PTHREAD )
- pthread_mutex_lock( &once_mutex );
-#endif
+#ifdef UNDER_CE
+static void CALLBACK vlc_cancel_self (ULONG_PTR dummy);
- if( i_initializations == 0 )
+static DWORD vlc_cancelable_wait (DWORD count, const HANDLE *handles,
+ DWORD delay)
+{
+ vlc_cancel_t *nfo = vlc_threadvar_get (&cancel_key);
+ if (nfo == NULL)
{
- p_root = vlc_custom_create( (vlc_object_t *)NULL, sizeof( *p_root ),
- VLC_OBJECT_GENERIC, "root" );
- if( p_root == NULL )
- {
- i_ret = VLC_ENOMEM;
- goto out;
- }
+ /* Main thread - cannot be cancelled anyway */
+ return WaitForMultipleObjects (count, handles, FALSE, delay);
+ }
+ HANDLE new_handles[count + 1];
+ memcpy(new_handles, handles, count * sizeof(HANDLE));
+ new_handles[count] = nfo->cancel_event;
+ DWORD result = WaitForMultipleObjects (count + 1, new_handles, FALSE,
+ delay);
+ if (result == WAIT_OBJECT_0 + count)
+ {
+ vlc_cancel_self (NULL);
+ return WAIT_IO_COMPLETION;
+ }
+ else
+ {
+ return result;
+ }
+}
- /* We should be safe now. Do all the initialization stuff we want. */
-#ifndef LIBVLC_USE_PTHREAD_CANCEL
- vlc_threadvar_create( &cancel_key, free );
-#endif
+DWORD SleepEx (DWORD dwMilliseconds, BOOL bAlertable)
+{
+ if (bAlertable)
+ {
+ DWORD result = vlc_cancelable_wait (0, NULL, dwMilliseconds);
+ return (result == WAIT_TIMEOUT) ? 0 : WAIT_IO_COMPLETION;
}
- i_initializations++;
+ else
+ {
+ Sleep(dwMilliseconds);
+ return 0;
+ }
+}
-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 );
+DWORD WaitForSingleObjectEx (HANDLE hHandle, DWORD dwMilliseconds,
+ BOOL bAlertable)
+{
+ if (bAlertable)
+ {
+ /* The MSDN documentation specifies different return codes,
+ * but in practice they are the same. We just check that it
+ * remains so. */
+#if WAIT_ABANDONED != WAIT_ABANDONED_0
+# error Windows headers changed, code needs to be rewritten!
#endif
-
- return i_ret;
+ return vlc_cancelable_wait (1, &hHandle, dwMilliseconds);
+ }
+ else
+ {
+ return WaitForSingleObject (hHandle, dwMilliseconds);
+ }
}
-/*****************************************************************************
- * vlc_threads_end: stop threads system
- *****************************************************************************
- * FIXME: This function is far from being threadsafe.
- *****************************************************************************/
-void vlc_threads_end( void )
+DWORD WaitForMultipleObjectsEx (DWORD nCount, const HANDLE *lpHandles,
+ BOOL bWaitAll, DWORD dwMilliseconds,
+ BOOL bAlertable)
{
-#if defined( LIBVLC_USE_PTHREAD )
- pthread_mutex_lock( &once_mutex );
+ if (bAlertable)
+ {
+ /* We do not support the bWaitAll case */
+ assert (! bWaitAll);
+ return vlc_cancelable_wait (nCount, lpHandles, dwMilliseconds);
+ }
+ else
+ {
+ return WaitForMultipleObjects (nCount, lpHandles, bWaitAll,
+ dwMilliseconds);
+ }
+}
#endif
- assert( i_initializations > 0 );
+#ifdef WIN32
+static vlc_mutex_t super_mutex;
+
+BOOL WINAPI DllMain (HINSTANCE hinstDll, DWORD fdwReason, LPVOID lpvReserved)
+{
+ (void) hinstDll;
+ (void) lpvReserved;
- if( i_initializations == 1 )
+ switch (fdwReason)
{
- vlc_object_release( p_root );
-#ifndef LIBVLC_USE_PTHREAD
- vlc_threadvar_delete( &cancel_key );
-#endif
- }
- i_initializations--;
+ case DLL_PROCESS_ATTACH:
+ vlc_mutex_init (&super_mutex);
+ vlc_threadvar_create (&cancel_key, free);
+ break;
-#if defined( LIBVLC_USE_PTHREAD )
- pthread_mutex_unlock( &once_mutex );
-#endif
+ case DLL_PROCESS_DETACH:
+ vlc_threadvar_delete( &cancel_key );
+ vlc_mutex_destroy (&super_mutex);
+ break;
+ }
+ return TRUE;
}
+#endif
#if defined (__GLIBC__) && (__GLIBC_MINOR__ < 6)
/* This is not prototyped under glibc, though it exists. */
return i_result;
#elif defined( WIN32 )
+ /* This creates a recursive mutex. This is OK as fast mutexes have
+ * no defined behavior in case of recursive locking. */
InitializeCriticalSection (&p_mutex->mutex);
- p_mutex->recursive = false;
+ p_mutex->initialized = 1;
return 0;
#endif
#elif defined( WIN32 )
InitializeCriticalSection( &p_mutex->mutex );
- p_mutex->owner = 0; /* the error value for GetThreadId()! */
- p_mutex->recursion = 0;
- p_mutex->recursive = true;
+ p_mutex->initialized = 1;
return 0;
#endif
VLC_THREAD_ASSERT ("destroying mutex");
#elif defined( WIN32 )
+ assert (p_mutex->initialized);
DeleteCriticalSection (&p_mutex->mutex);
#endif
VLC_THREAD_ASSERT ("locking mutex");
#elif defined( WIN32 )
- if (p_mutex->recursive)
- {
- DWORD self = GetCurrentThreadId ();
-
- if ((DWORD)InterlockedCompareExchange (&p_mutex->owner, self,
- self) == self)
- { /* We already locked this recursive mutex */
- p_mutex->recursion++;
- return;
- }
-
- /* We need to lock this recursive mutex */
- EnterCriticalSection (&p_mutex->mutex);
- self = InterlockedCompareExchange (&p_mutex->owner, self, 0);
- assert (self == 0); /* no previous owner */
- return;
+ if (InterlockedCompareExchange (&p_mutex->initialized, 0, 0) == 0)
+ { /* ^^ We could also lock super_mutex all the time... sluggish */
+ assert (p_mutex != &super_mutex); /* this one cannot be static */
+
+ vlc_mutex_lock (&super_mutex);
+ vlc_mutex_init (p_mutex);
+ /* FIXME: destroy the mutex some time... */
+ vlc_mutex_unlock (&super_mutex);
}
- /* Non-recursive mutex */
EnterCriticalSection (&p_mutex->mutex);
#endif
VLC_THREAD_ASSERT ("unlocking mutex");
#elif defined( WIN32 )
- if (p_mutex->recursive)
- {
- if (--p_mutex->recursion != 0)
- return; /* We still own this mutex */
-
- /* We release the mutex */
- DWORD self = GetCurrentThreadId ();
- self = InterlockedCompareExchange (&p_mutex->owner, self, 0);
- assert (self == GetCurrentThreadId ());
- /* fall through */
- }
LeaveCriticalSection (&p_mutex->mutex);
#endif
#endif
}
-#ifdef UNDER_CE
-# warning FIXME
-# define WaitForMultipleObjectsEx(a,b,c) WaitForMultipleObjects(a,b)
-#endif
-
/**
* Waits for a condition variable. The calling thread will be suspended until
* another thread calls vlc_cond_signal() or vlc_cond_broadcast() on the same
#elif defined( WIN32 )
DWORD result;
+
do
{
vlc_testcancel ();
}
while (result == WAIT_IO_COMPLETION);
+ ResetEvent (*p_condvar);
+
#endif
}
}
while (result == WAIT_IO_COMPLETION);
+ ResetEvent (*p_condvar);
+
return (result == WAIT_OBJECT_0) ? 0 : ETIMEDOUT;
#endif
#if defined( LIBVLC_USE_PTHREAD )
i_ret = pthread_key_create( p_tls, destr );
-#elif defined( UNDER_CE )
- i_ret = ENOSYS;
#elif defined( WIN32 )
/* FIXME: remember/use the destr() callback and stop leaking whatever */
*p_tls = TlsAlloc();
{
#if defined( LIBVLC_USE_PTHREAD )
pthread_key_delete (*p_tls);
-#elif defined( UNDER_CE )
#elif defined( WIN32 )
TlsFree (*p_tls);
#else
{
vlc_cancel_t cancel_data = VLC_CANCEL_INIT;
vlc_thread_t self = data;
+#ifdef UNDER_CE
+ cancel_data.cancel_event = self->cancel_event;
+#endif
vlc_threadvar_set (&cancel_key, &cancel_data);
self->data = self->entry (self->data);
pthread_attr_setschedparam (&attr, &sp);
}
+ /* The thread stack size.
+ * The lower the value, the less address space per thread, the highest
+ * maximum simultaneous threads per process. Too low values will cause
+ * stack overflows and weird crashes. Set with caution. Also keep in mind
+ * that 64-bits platforms consume more stack than 32-bits one.
+ *
+ * Thanks to on-demand paging, thread stack size only affects address space
+ * consumption. In terms of memory, threads only use what they need
+ * (rounded up to the page boundary).
+ *
+ * For example, on Linux i386, the default is 2 mega-bytes, which supports
+ * about 320 threads per processes. */
+#define VLC_STACKSIZE (128 * sizeof (void *) * 1024)
+
+#ifdef VLC_STACKSIZE
+ ret = pthread_attr_setstacksize (&attr, VLC_STACKSIZE);
+ assert (ret == 0); /* fails iif VLC_STACKSIZE is invalid */
+#endif
+
ret = pthread_create (p_handle, &attr, entry, data);
pthread_sigmask (SIG_SETMASK, &oldset, NULL);
pthread_attr_destroy (&attr);
th->data = data;
th->entry = entry;
#if defined( UNDER_CE )
+ th->cancel_event = CreateEvent (NULL, FALSE, FALSE, NULL);
+ if (th->cancel_event == NULL)
+ {
+ free(th);
+ return errno;
+ }
hThread = CreateThread (NULL, 0, vlc_entry, th, CREATE_SUSPENDED, NULL);
#else
hThread = (HANDLE)(uintptr_t)
if (hThread)
{
+#ifndef UNDER_CE
/* Thread closes the handle when exiting, duplicate it here
* to be on the safe side when joining. */
if (!DuplicateHandle (GetCurrentProcess (), hThread,
free (th);
return ENOMEM;
}
+#else
+ th->handle = hThread;
+#endif
ResumeThread (hThread);
if (priority)
{
#if defined (LIBVLC_USE_PTHREAD_CANCEL)
pthread_cancel (thread_id);
+#elif defined (UNDER_CE)
+ SetEvent (thread_id->cancel_event);
#elif defined (WIN32)
QueueUserAPC (vlc_cancel_self, thread_id->handle, 0);
#else
CloseHandle (handle->handle);
if (result)
*result = handle->data;
+#if defined( UNDER_CE )
+ CloseHandle (handle->cancel_event);
+#endif
free (handle);
#endif
boot->entry = func;
boot->object = p_this;
- vlc_object_lock( p_this );
-
/* Make sure we don't re-create a thread if the object has already one */
assert( !p_priv->b_thread );
#if defined( LIBVLC_USE_PTHREAD )
+ if (b_wait)
+ sem_init (&p_priv->thread_ready, 0, 0);
#ifndef __APPLE__
if( config_GetInt( p_this, "rt-priority" ) > 0 )
#endif
if( config_GetType( p_this, "rt-offset" ) )
i_priority += config_GetInt( p_this, "rt-offset" );
}
+#elif defined (WIN32)
+ if (b_wait)
+ p_priv->thread_ready = CreateEvent (NULL, TRUE, FALSE, NULL);
#endif
+ p_priv->b_thread = true;
i_ret = vlc_clone( &p_priv->thread_id, thread_entry, boot, i_priority );
if( i_ret == 0 )
{
+ msg_Dbg( p_this, "thread (%s) created at priority %d (%s:%d)",
+ psz_name, i_priority, psz_file, i_line );
if( b_wait )
{
msg_Dbg( p_this, "waiting for thread initialization" );
- vlc_object_wait( p_this );
+#if defined (LIBVLC_USE_PTHREAD)
+ sem_wait (&p_priv->thread_ready);
+ sem_destroy (&p_priv->thread_ready);
+#elif defined (WIN32)
+ WaitForSingleObject (p_priv->thread_ready, INFINITE);
+ CloseHandle (p_priv->thread_ready);
+#endif
}
-
- 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 );
}
else
{
+ p_priv->b_thread = false;
errno = i_ret;
msg_Err( p_this, "%s thread could not be created at %s:%d (%m)",
psz_name, psz_file, i_line );
}
- vlc_object_unlock( p_this );
return i_ret;
}
+#undef vlc_thread_ready
+void vlc_thread_ready (vlc_object_t *obj)
+{
+ vlc_object_internals_t *priv = vlc_internals (obj);
+
+ assert (priv->b_thread);
+#if defined (LIBVLC_USE_PTHREAD)
+ assert (pthread_equal (pthread_self (), priv->thread_id));
+ sem_post (&priv->thread_ready);
+#elif defined (WIN32)
+ SetEvent (priv->thread_ready);
+#endif
+}
+
/*****************************************************************************
* 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)
FILETIME create_ft, exit_ft, kernel_ft, user_ft;
int64_t real_time, kernel_time, user_time;
+#ifndef UNDER_CE
if( ! DuplicateHandle(GetCurrentProcess(),
p_priv->thread_id->handle,
GetCurrentProcess(),
p_priv->b_thread = false;
return; /* We have a problem! */
}
+#else
+ hThread = p_priv->thread_id->handle;
+#endif
vlc_join( p_priv->thread_id, NULL );
{
for (vlc_cleanup_t *p = nfo->cleaners; p != NULL; p = p->next)
p->proc (p->data);
+#ifndef WIN32
free (nfo);
+#endif
#if defined (LIBVLC_USE_PTHREAD)
pthread_exit (PTHREAD_CANCELLED);
+#elif defined (UNDER_CE)
+ ExitThread(0);
#elif defined (WIN32)
_endthread ();
#else
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