1 files changed, 67 insertions, 0 deletions
diff --git a/osdep/timer.c b/osdep/timer.c
new file mode 100644
index 0000000..d0a8a92
--- /dev/null
+++ b/osdep/timer.c
@@ -0,0 +1,67 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * mpv is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <limits.h>
+#include <assert.h>
+
+#include "common/common.h"
+#include "common/msg.h"
+#include "misc/random.h"
+#include "threads.h"
+#include "timer.h"
+
+static uint64_t raw_time_offset;
+static mp_once timer_init_once = MP_STATIC_ONCE_INITIALIZER;
+
+static void do_timer_init(void)
+{
+    mp_raw_time_init();
+    mp_rand_seed(mp_raw_time_ns());
+    raw_time_offset = mp_raw_time_ns();
+    assert(raw_time_offset > 0);
+}
+
+void mp_time_init(void)
+{
+    mp_exec_once(&timer_init_once, do_timer_init);
+}
+
+int64_t mp_time_ns(void)
+{
+    return mp_raw_time_ns() - raw_time_offset;
+}
+
+double mp_time_sec(void)
+{
+    return mp_time_ns() / 1e9;
+}
+
+int64_t mp_time_ns_add(int64_t time_ns, double timeout_sec)
+{
+    assert(time_ns > 0); // mp_time_ns() returns strictly positive values
+    double t = MPCLAMP(timeout_sec * 1e9, -0x1p63, 0x1p63);
+    int64_t ti = t == 0x1p63 ? INT64_MAX : (int64_t)t;
+    if (ti > INT64_MAX - time_ns)
+        return INT64_MAX;
+    if (ti <= -time_ns)
+        return 1;
+    return time_ns + ti;
+}