| // 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> |
| |
| #include "mojo/public/c/system/macros.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) |
| |
| MOJO_BEGIN_EXTERN_C |
| |
| // |MojoGetTimeTicksNow()|: 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); |
| |
| MOJO_END_EXTERN_C |
| |
| #endif // MOJO_PUBLIC_C_SYSTEM_TIME_H_ |
