1 files changed, 45 insertions, 0 deletions
diff --git a/services/surfaceflinger/tests/waitforvsync/waitforvsync.cpp b/services/surfaceflinger/tests/waitforvsync/waitforvsync.cpp
new file mode 100644
index 0000000..279b88b
--- /dev/null
+++ b/services/surfaceflinger/tests/waitforvsync/waitforvsync.cpp
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <linux/fb.h>
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+
+#ifndef FBIO_WAITFORVSYNC
+#define FBIO_WAITFORVSYNC   _IOW('F', 0x20, __u32)
+#endif
+
+int main(int argc, char** argv) {
+    int fd = open("/dev/graphics/fb0", O_RDWR);
+    if (fd >= 0) {
+        do {
+            uint32_t crt = 0;
+           int err = ioctl(fd, FBIO_WAITFORVSYNC, &crt);
+           if (err < 0) {
+               printf("FBIO_WAITFORVSYNC error: %s\n", strerror(errno));
+               break;
+           }
+        } while(1);
+        close(fd);
+    }
+    return 0;
+}