/**
* WaitForMultipleObjectsEx:
* @numobjects: The number of objects in @handles. The maximum allowed
* is %MAXIMUM_WAIT_OBJECTS.
* @handles: An array of object handles. Duplicates are not allowed.
* @waitall: If %TRUE, this function waits until all of the handles
* are signalled. If %FALSE, this function returns when any object is
* signalled.
* @timeout: The maximum time in milliseconds to wait for.
* @alertable: if TRUE, the wait can be interrupted by an APC call
*
* This function returns when either one or more of @handles is
* signalled, or @timeout ms elapses. If @timeout is zero, the state
* of each item of @handles is tested and the function returns
* immediately. If @timeout is %INFINITE, the function waits forever.
*
* Return value: %WAIT_OBJECT_0 to %WAIT_OBJECT_0 + @numobjects - 1 -
* if @waitall is %TRUE, indicates that all objects are signalled. If
* @waitall is %FALSE, the return value minus %WAIT_OBJECT_0 indicates
* the first index into @handles of the objects that are signalled.
* %WAIT_ABANDONED_0 to %WAIT_ABANDONED_0 + @numobjects - 1 - if
* @waitall is %TRUE, indicates that all objects are signalled, and at
* least one object is an abandoned mutex object (See
* WaitForSingleObject() for a description of abandoned mutexes.) If
* @waitall is %FALSE, the return value minus %WAIT_ABANDONED_0
* indicates the first index into @handles of an abandoned mutex.
* %WAIT_TIMEOUT - The @timeout interval elapsed and no objects in
* @handles are signalled. %WAIT_FAILED - an error occurred.
* %WAIT_IO_COMPLETION - the wait was ended by an APC.
*/
guint32 WaitForMultipleObjectsEx(guint32 numobjects, gpointer *handles,
gboolean waitall, guint32 timeout,
gboolean alertable)
{
GHashTable *dups;
gboolean duplicate = FALSE, bogustype = FALSE, done;
guint32 count, lowest;
struct timespec abstime;
guint i;
guint32 ret;
int thr_ret;
gpointer current_thread = _wapi_thread_handle_from_id (pthread_self ());
guint32 retval;
gboolean poll;
if (current_thread == NULL) {
SetLastError (ERROR_INVALID_HANDLE);
return(WAIT_FAILED);
}
if (numobjects > MAXIMUM_WAIT_OBJECTS) {
#ifdef DEBUG
g_message ("%s: Too many handles: %d", __func__, numobjects);
#endif
return(WAIT_FAILED);
}
if (numobjects == 1) {
return WaitForSingleObjectEx (handles [0], timeout, alertable);
}
/* Check for duplicates */
dups = g_hash_table_new (g_direct_hash, g_direct_equal);
for (i = 0; i < numobjects; i++) {
gpointer exists;
if (handles[i] == _WAPI_THREAD_CURRENT) {
handles[i] = _wapi_thread_handle_from_id (pthread_self ());
if (handles[i] == NULL) {
#ifdef DEBUG
g_message ("%s: Handle %d bogus", __func__, i);
#endif
bogustype = TRUE;
break;
}
}
if ((GPOINTER_TO_UINT (handles[i]) & _WAPI_PROCESS_UNHANDLED) == _WAPI_PROCESS_UNHANDLED) {
#ifdef DEBUG
g_message ("%s: Handle %d pseudo process", __func__,
i);
#endif
bogustype = TRUE;
break;
}
exists = g_hash_table_lookup (dups, handles[i]);
if (exists != NULL) {
#ifdef DEBUG
g_message ("%s: Handle %p duplicated", __func__,
handles[i]);
#endif
duplicate = TRUE;
break;
}
if (_wapi_handle_test_capabilities (handles[i], WAPI_HANDLE_CAP_WAIT) == FALSE) {
#ifdef DEBUG
g_message ("%s: Handle %p can't be waited for",
__func__, handles[i]);
#endif
bogustype = TRUE;
break;
}
g_hash_table_insert (dups, handles[i], handles[i]);
_wapi_handle_ops_prewait (handles[i]);
}
g_hash_table_destroy (dups);
if (duplicate == TRUE) {
#ifdef DEBUG
g_message ("%s: Returning due to duplicates", __func__);
#endif
return(WAIT_FAILED);
}
if (bogustype == TRUE) {
#ifdef DEBUG
g_message ("%s: Returning due to bogus type", __func__);
#endif
return(WAIT_FAILED);
}
poll = FALSE;
for (i = 0; i < numobjects; ++i)
if (_wapi_handle_type (handles [i]) == WAPI_HANDLE_PROCESS)
/* Can't wait for a process handle + another handle without polling */
poll = TRUE;
done = test_and_own (numobjects, handles, waitall, &count, &lowest);
if (done == TRUE) {
return(WAIT_OBJECT_0+lowest);
}
if (timeout == 0) {
return WAIT_TIMEOUT;
}
/* Have to wait for some or all handles to become signalled
*/
if(timeout!=INFINITE) {
_wapi_calc_timeout (&abstime, timeout);
}
if (alertable && _wapi_thread_apc_pending (current_thread)) {
_wapi_thread_dispatch_apc_queue (current_thread);
return WAIT_IO_COMPLETION;
}
for (i = 0; i < numobjects; i++) {
/* Add a reference, as we need to ensure the handle wont
* disappear from under us while we're waiting in the loop
* (not lock, as we don't want exclusive access here)
*/
_wapi_handle_ref (handles[i]);
}
while(1) {
/* Prod all handles with prewait methods and
* special-wait handles that aren't already signalled
*/
for (i = 0; i < numobjects; i++) {
_wapi_handle_ops_prewait (handles[i]);
if (_wapi_handle_test_capabilities (handles[i], WAPI_HANDLE_CAP_SPECIAL_WAIT) == TRUE && _wapi_handle_issignalled (handles[i]) == FALSE) {
_wapi_handle_ops_special_wait (handles[i], 0);
}
}
#ifdef DEBUG
g_message ("%s: locking signal mutex", __func__);
#endif
pthread_cleanup_push ((void(*)(void *))_wapi_handle_unlock_signal_mutex, NULL);
thr_ret = _wapi_handle_lock_signal_mutex ();
g_assert (thr_ret == 0);
/* Check the signalled state of handles inside the critical section */
if (waitall) {
done = TRUE;
for (i = 0; i < numobjects; i++)
if (!_wapi_handle_issignalled (handles [i]))
done = FALSE;
} else {
done = FALSE;
for (i = 0; i < numobjects; i++)
if (_wapi_handle_issignalled (handles [i]))
done = TRUE;
}
if (!done) {
/* Enter the wait */
if (timeout == INFINITE) {
ret = _wapi_handle_wait_signal (poll);
} else {
ret = _wapi_handle_timedwait_signal (&abstime, poll);
}
} else {
/* No need to wait */
ret = 0;
}
#ifdef DEBUG
g_message ("%s: unlocking signal mutex", __func__);
#endif
thr_ret = _wapi_handle_unlock_signal_mutex (NULL);
g_assert (thr_ret == 0);
pthread_cleanup_pop (0);
if (alertable && _wapi_thread_apc_pending (current_thread)) {
_wapi_thread_dispatch_apc_queue (current_thread);
retval = WAIT_IO_COMPLETION;
break;
}
/* Check if everything is signalled, as we can't
* guarantee to notice a shared signal even if the
* wait timed out
*/
done = test_and_own (numobjects, handles, waitall,
&count, &lowest);
if (done == TRUE) {
retval = WAIT_OBJECT_0+lowest;
break;
} else if (ret != 0) {
/* Didn't get all handles, and there was a
* timeout or other error
*/
#ifdef DEBUG
g_message ("%s: wait returned error: %s", __func__,
strerror (ret));
#endif
if(ret==ETIMEDOUT) {
retval = WAIT_TIMEOUT;
} else {
retval = WAIT_FAILED;
}
break;
}
}
for (i = 0; i < numobjects; i++) {
/* Unref everything we reffed above */
_wapi_handle_unref (handles[i]);
}
return retval;
}
/**
* WaitForMultipleObjectsEx:
* @numobjects: The number of objects in @handles. The maximum allowed
* is %IO_LAYER_MAXIMUM_WAIT_OBJECTS.
* @handles: An array of object handles. Duplicates are not allowed.
* @waitall: If %TRUE, this function waits until all of the handles
* are signalled. If %FALSE, this function returns when any object is
* signalled.
* @timeout: The maximum time in milliseconds to wait for.
* @alertable: if TRUE, the wait can be interrupted by an APC call
*
* This function returns when either one or more of @handles is
* signalled, or @timeout ms elapses. If @timeout is zero, the state
* of each item of @handles is tested and the function returns
* immediately. If @timeout is %INFINITE, the function waits forever.
*
* Return value: %WAIT_OBJECT_0 to %WAIT_OBJECT_0 + @numobjects - 1 -
* if @waitall is %TRUE, indicates that all objects are signalled. If
* @waitall is %FALSE, the return value minus %WAIT_OBJECT_0 indicates
* the first index into @handles of the objects that are signalled.
* %WAIT_ABANDONED_0 to %WAIT_ABANDONED_0 + @numobjects - 1 - if
* @waitall is %TRUE, indicates that all objects are signalled, and at
* least one object is an abandoned mutex object (See
* WaitForSingleObject() for a description of abandoned mutexes.) If
* @waitall is %FALSE, the return value minus %WAIT_ABANDONED_0
* indicates the first index into @handles of an abandoned mutex.
* %WAIT_TIMEOUT - The @timeout interval elapsed and no objects in
* @handles are signalled. %WAIT_FAILED - an error occurred.
* %WAIT_IO_COMPLETION - the wait was ended by an APC.
*/
guint32 WaitForMultipleObjectsEx(guint32 numobjects, gpointer *handles,
gboolean waitall, guint32 timeout,
gboolean alertable)
{
GHashTable *dups;
gboolean duplicate = FALSE, bogustype = FALSE, done;
guint32 count, lowest;
struct timespec abstime;
guint i;
guint32 ret;
int thr_ret;
gpointer current_thread = GetCurrentThread ();
if (numobjects > IO_LAYER_MAXIMUM_WAIT_OBJECTS) {
#ifdef DEBUG
g_message ("%s: Too many handles: %d", __func__, numobjects);
#endif
return(WAIT_FAILED);
}
if (numobjects == 1) {
return WaitForSingleObjectEx (handles [0], timeout, alertable);
}
/* Check for duplicates */
dups = g_hash_table_new (g_direct_hash, g_direct_equal);
for (i = 0; i < numobjects; i++) {
gpointer exists = g_hash_table_lookup (dups, handles[i]);
if (exists != NULL) {
#ifdef DEBUG
g_message ("%s: Handle %p duplicated", __func__,
handles[i]);
#endif
duplicate = TRUE;
break;
}
if (_wapi_handle_test_capabilities (handles[i], WAPI_HANDLE_CAP_WAIT) == FALSE) {
#ifdef DEBUG
g_message ("%s: Handle %p can't be waited for",
__func__, handles[i]);
#endif
bogustype = TRUE;
}
g_hash_table_insert (dups, handles[i], handles[i]);
}
g_hash_table_destroy (dups);
if (duplicate == TRUE) {
#ifdef DEBUG
g_message ("%s: Returning due to duplicates", __func__);
#endif
return(WAIT_FAILED);
}
if (bogustype == TRUE) {
#ifdef DEBUG
g_message ("%s: Returning due to bogus type", __func__);
#endif
return(WAIT_FAILED);
}
done = test_and_own (numobjects, handles, waitall, &count, &lowest);
if (done == TRUE) {
return(WAIT_OBJECT_0+lowest);
}
/* Have to wait for some or all handles to become signalled
*/
if(timeout!=INFINITE) {
_wapi_calc_timeout (&abstime, timeout);
}
if (alertable && _wapi_thread_apc_pending (current_thread)) {
_wapi_thread_dispatch_apc_queue (current_thread);
return WAIT_IO_COMPLETION;
}
while(1) {
/* Prod all special-wait handles that aren't already
* signalled
*/
for (i = 0; i < numobjects; i++) {
if (_wapi_handle_test_capabilities (handles[i], WAPI_HANDLE_CAP_SPECIAL_WAIT) == TRUE && _wapi_handle_issignalled (handles[i]) == FALSE) {
_wapi_handle_ops_special_wait (handles[i], 0);
}
}
/* Check before waiting on the condition, just in case
*/
done = test_and_own (numobjects, handles, waitall,
&count, &lowest);
if (done == TRUE) {
return(WAIT_OBJECT_0 + lowest);
}
#ifdef DEBUG
g_message ("%s: locking signal mutex", __func__);
#endif
pthread_cleanup_push ((void(*)(void *))_wapi_handle_unlock_signal_mutex, NULL);
thr_ret = _wapi_handle_lock_signal_mutex ();
g_assert (thr_ret == 0);
if (timeout == INFINITE) {
ret = _wapi_handle_wait_signal ();
} else {
ret = _wapi_handle_timedwait_signal (&abstime);
}
#ifdef DEBUG
g_message ("%s: unlocking signal mutex", __func__);
#endif
thr_ret = _wapi_handle_unlock_signal_mutex (NULL);
g_assert (thr_ret == 0);
pthread_cleanup_pop (0);
if (alertable && _wapi_thread_apc_pending (current_thread)) {
_wapi_thread_dispatch_apc_queue (current_thread);
return WAIT_IO_COMPLETION;
}
/* Check if everything is signalled, as we can't
* guarantee to notice a shared signal even if the
* wait timed out
*/
done = test_and_own (numobjects, handles, waitall,
&count, &lowest);
if (done == TRUE) {
return(WAIT_OBJECT_0+lowest);
} else if (ret != 0) {
/* Didn't get all handles, and there was a
* timeout or other error
*/
#ifdef DEBUG
g_message ("%s: wait returned error: %s", __func__,
strerror (ret));
#endif
if(ret==ETIMEDOUT) {
return(WAIT_TIMEOUT);
} else {
return(WAIT_FAILED);
}
}
}
}
