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authorJames Hawkins2017-02-13 17:47:21 -0600
committerJames Hawkins2017-02-13 17:47:21 -0600
commit7c92e484503f239000ef97ef5b067907fbeaa4a6 (patch)
tree1bdbaa087da8202bd1eb6a97bdfcf0aa67f2e1ec /base/chrono_utils.cpp
parenta3e4977325763b4a6fd290ee01b9ce133df8ab93 (diff)
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bootstat: Refactor init/utils/boot_clock into base/chrono_utils.
Use this for bootstat and init. This replaces the custom uptime parser in bootstat. This is a reland of aosp/332854 with a fix for Darwin. Bug: 34352037 Test: chrono_utils_test Change-Id: Ib2567d8df0e460ab59753ac1c053dd7f9f1008a7
Diffstat (limited to 'base/chrono_utils.cpp')
-rw-r--r--base/chrono_utils.cpp43
1 files changed, 43 insertions, 0 deletions
diff --git a/base/chrono_utils.cpp b/base/chrono_utils.cpp
new file mode 100644
index 000000000..644fd28bb
--- /dev/null
+++ b/base/chrono_utils.cpp
@@ -0,0 +1,43 @@
1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "android-base/chrono_utils.h"
18
19#include <time.h>
20
21namespace android {
22namespace base {
23
24boot_clock::time_point boot_clock::now() {
25 timespec ts;
26 clockid_t clk_id;
27
28#ifdef __ANDROID__
29 clk_id = CLOCK_BOOTTIME;
30#else
31 // Darwin does not support CLOCK_BOOTTIME. CLOCK_MONOTONIC is a sufficient
32 // fallback; the only loss of precision is the time duration when the system
33 // is suspended.
34 clk_id = CLOCK_MONOTONIC;
35#endif // __ANDROID__
36
37 clock_gettime(clk_id, &ts);
38 return boot_clock::time_point(std::chrono::seconds(ts.tv_sec) +
39 std::chrono::nanoseconds(ts.tv_nsec));
40}
41
42} // namespace base
43} // namespace android