1 files changed, 112 insertions, 0 deletions
diff --git a/xorg-server/present/present_fence.c b/xorg-server/present/present_fence.c
new file mode 100644
index 000000000..db5efcaad
--- /dev/null
+++ b/xorg-server/present/present_fence.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright © 2013 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_XORG_CONFIG_H
+#include <xorg-config.h>
+#endif
+
+#include "present_priv.h"
+#include <gcstruct.h>
+#include <misync.h>
+#include <misyncstr.h>
+
+/*
+ * Wraps SyncFence objects so we can add a SyncTrigger to find out
+ * when the SyncFence gets destroyed and clean up appropriately
+ */
+
+struct present_fence {
+    SyncTrigger         trigger;
+    SyncFence           *fence;
+};
+
+/*
+ * SyncTrigger callbacks
+ */
+static Bool
+present_fence_sync_check_trigger(SyncTrigger *trigger, XSyncValue oldval)
+{
+    return FALSE;
+}
+
+static void
+present_fence_sync_trigger_fired(SyncTrigger *trigger)
+{
+}
+
+static void
+present_fence_sync_counter_destroyed(SyncTrigger *trigger)
+{
+    struct present_fence        *present_fence = container_of(trigger, struct present_fence, trigger);
+
+    present_fence->fence = NULL;
+}
+
+struct present_fence *
+present_fence_create(SyncFence *fence)
+{
+    struct present_fence        *present_fence;
+
+    present_fence = calloc (1, sizeof (struct present_fence));
+    if (!present_fence)
+        return NULL;
+
+    present_fence->fence = fence;
+    present_fence->trigger.pSync = (SyncObject *) fence;
+    present_fence->trigger.CheckTrigger = present_fence_sync_check_trigger;
+    present_fence->trigger.TriggerFired = present_fence_sync_trigger_fired;
+    present_fence->trigger.CounterDestroyed = present_fence_sync_counter_destroyed;
+
+    if (SyncAddTriggerToSyncObject(&present_fence->trigger) != Success) {
+        free (present_fence);
+        return NULL;
+    }
+    return present_fence;
+}
+
+void
+present_fence_destroy(struct present_fence *present_fence)
+{
+    if (present_fence) {
+        if (present_fence->fence)
+            SyncDeleteTriggerFromSyncObject(&present_fence->trigger);
+        free(present_fence);
+    }
+}
+
+void
+present_fence_set_triggered(struct present_fence *present_fence)
+{
+    if (present_fence)
+        if (present_fence->fence)
+            (*present_fence->fence->funcs.SetTriggered) (present_fence->fence);
+}
+
+XID
+present_fence_id(struct present_fence *present_fence)
+{
+    if (!present_fence)
+        return None;
+    if (!present_fence->fence)
+        return None;
+    return present_fence->fence->sync.id;
+}