lib/sw_sync: Add helper functions for managing synchronization primitives

Base functions to help testing the Sync File Framework (explicit fencing
mechanism ported from Android).
These functions allow you to create, use and destroy timelines and fences.

Signed-off-by: Robert Foss <robert.foss@collabora.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/lib/sw_sync.h b/lib/sw_sync.h
new file mode 100644
index 00000000..cea5a603
--- /dev/null
+++ b/lib/sw_sync.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright © 2016 Collabora, Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Robert Foss <robert.foss@collabora.com>
+ */
+
+#ifndef SW_SYNC_H
+#define SW_SYNC_H
+
+#define SW_SYNC_FENCE_STATUS_ERROR		(-1)
+#define SW_SYNC_FENCE_STATUS_ACTIVE		(0)
+#define SW_SYNC_FENCE_STATUS_SIGNALED	(1)
+
+int sw_sync_timeline_create(void);
+int __sw_sync_fence_create(int fd, uint32_t seqno);
+int sw_sync_fence_create(int fd, uint32_t seqno);
+void sw_sync_timeline_inc(int fd, uint32_t count);
+int sync_merge(int fd1, int fd2);
+int sync_wait(int fence, int timeout);
+int sync_fence_count(int fd);
+int sync_fence_count_status(int fd, int status);
+
+#endif
+