Index: mojo/public/c/system/time.h |
diff --git a/mojo/public/c/system/time.h b/mojo/public/c/system/time.h |
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+// Copyright 2016 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+// This file contains Mojo system time-related declarations/definitions. |
+// |
+// Note: This header should be compilable as C. |
+ |
+#ifndef MOJO_PUBLIC_C_SYSTEM_TIME_H_ |
+#define MOJO_PUBLIC_C_SYSTEM_TIME_H_ |
+ |
+#include <stdint.h> |
+ |
+// |MojoTimeTicks|: A time delta, in microseconds, the meaning of which is |
+// source-dependent. |
+ |
+typedef int64_t MojoTimeTicks; |
+ |
+// |MojoDeadline|: Used to specify deadlines (timeouts), in microseconds (except |
+// for |MOJO_DEADLINE_INDEFINITE|). |
+// |MOJO_DEADLINE_INDEFINITE| - Used to indicate "forever". |
+ |
+typedef uint64_t MojoDeadline; |
+ |
+#define MOJO_DEADLINE_INDEFINITE ((MojoDeadline)-1) |
+ |
+#ifdef __cplusplus |
+extern "C" { |
+#endif |
+ |
+// Note: Pointer parameters that are labelled "optional" may be null (at least |
+// under some circumstances). Non-const pointer parameters are also labeled |
+// "in", "out", or "in/out", to indicate how they are used. (Note that how/if |
+// such a parameter is used may depend on other parameters or the requested |
+// operation's success/failure. E.g., a separate |flags| parameter may control |
+// whether a given "in/out" parameter is used for input, output, or both.) |
+ |
+// Returns the time, in microseconds, since some undefined point in the past. |
+// The values are only meaningful relative to other values that were obtained |
+// from the same device without an intervening system restart. Such values are |
+// guaranteed to be monotonically non-decreasing with the passage of real time. |
+// Although the units are microseconds, the resolution of the clock may vary and |
+// is typically in the range of ~1-15 ms. |
+MojoTimeTicks MojoGetTimeTicksNow(void); |
+ |
+#ifdef __cplusplus |
+} // extern "C" |
+#endif |
+ |
+#endif // MOJO_PUBLIC_C_SYSTEM_TIME_H_ |