bootstat: Refactor init/utils/boot_clock into base/chrono_utils. (7c92e484) · Commits · e / os / android_system_core

base/Android.bp

+22 −4

Original line number	Diff line number	Diff line
		@@ -42,21 +42,32 @@ cc_library {
		srcs: [
		"errors_unix.cpp",
		"properties.cpp",
		"chrono_utils.cpp",
		],
		cppflags: ["-Wexit-time-destructors"],
		},
		darwin: {
		srcs: ["errors_unix.cpp"],
		srcs: [
		"chrono_utils.cpp",
		"errors_unix.cpp",
		],
		cppflags: ["-Wexit-time-destructors"],
		},
		linux_bionic: {
		srcs: ["errors_unix.cpp"],
		srcs: [
		"chrono_utils.cpp",
		"errors_unix.cpp",
		],
		cppflags: ["-Wexit-time-destructors"],
		enabled: true,
		},
		linux: {
		srcs: ["errors_unix.cpp"],
		srcs: [
		"chrono_utils.cpp",
		"errors_unix.cpp",
		],
		cppflags: ["-Wexit-time-destructors"],
		host_ldlibs: ["-lrt"],
		},
		windows: {
		srcs: [
		@@ -88,7 +99,14 @@ cc_test {
		],
		target: {
		android: {
		srcs: ["properties_test.cpp"],
		srcs: [
		"chrono_utils_test.cpp",
		"properties_test.cpp"
		],
		},
		linux: {
		srcs: ["chrono_utils_test.cpp"],
		host_ldlibs: ["-lrt"],
		},
		windows: {
		srcs: ["utf8_test.cpp"],

+43 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2016 The Android Open Source Project
		* Copyright (C) 2017 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.
		@@ -14,25 +14,30 @@
		* limitations under the License.
		*/

		#include "uptime_parser.h"
		#include "android-base/chrono_utils.h"

		#include <time.h>
		#include <cstdlib>
		#include <string>
		#include <android-base/file.h>
		#include <android-base/logging.h>

		namespace bootstat {
		namespace android {
		namespace base {

		time_t ParseUptime() {
		std::string uptime_str;
		if (!android::base::ReadFileToString("/proc/uptime", &uptime_str)) {
		PLOG(ERROR) << "Failed to read /proc/uptime";
		return -1;
		}
		boot_clock::time_point boot_clock::now() {
		timespec ts;
		clockid_t clk_id;

		#ifdef __ANDROID__
		clk_id = CLOCK_BOOTTIME;
		#else
		// Darwin does not support CLOCK_BOOTTIME. CLOCK_MONOTONIC is a sufficient
		// fallback; the only loss of precision is the time duration when the system
		// is suspended.
		clk_id = CLOCK_MONOTONIC;
		#endif // __ANDROID__

		// Cast intentionally rounds down.
		return static_cast<time_t>(strtod(uptime_str.c_str(), NULL));
		clock_gettime(clk_id, &ts);
		return boot_clock::time_point(std::chrono::seconds(ts.tv_sec) +
		std::chrono::nanoseconds(ts.tv_nsec));
		}

		} // namespace bootstat
		No newline at end of file
		} // namespace base
		} // namespace android

0 → 100644

+47 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2017 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 "android-base/chrono_utils.h"

		#include <time.h>

		#include <chrono>

		#include <gtest/gtest.h>

		namespace android {
		namespace base {

		std::chrono::seconds GetBootTimeSeconds() {
		struct timespec now;
		clock_gettime(CLOCK_BOOTTIME, &now);

		auto now_tp = boot_clock::time_point(
		std::chrono::seconds(now.tv_sec) + std::chrono::nanoseconds(now.tv_nsec));
		return std::chrono::duration_cast<std::chrono::seconds>(
		now_tp.time_since_epoch());
		}

		// Tests (at least) the seconds accuracy of the boot_clock::now() method.
		TEST(ChronoUtilsTest, BootClockNowSeconds) {
		auto now = GetBootTimeSeconds();
		auto boot_seconds = std::chrono::duration_cast<std::chrono::seconds>(
		boot_clock::now().time_since_epoch());
		EXPECT_EQ(now, boot_seconds);
		}

		} // namespace base
		} // namespace android
		No newline at end of file

+17 −9

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2016 The Android Open Source Project
		* Copyright (C) 2017 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.
		@@ -14,16 +14,24 @@
		* limitations under the License.
		*/

		#ifndef UPTIME_PARSER_H_
		#define UPTIME_PARSER_H_
		#ifndef ANDROID_BASE_CHRONO_UTILS_H
		#define ANDROID_BASE_CHRONO_UTILS_H

		#include <time.h>
		#include <chrono>

		namespace bootstat {
		namespace android {
		namespace base {

		// Returns the number of seconds the system has been on since reboot.
		time_t ParseUptime();
		// A std::chrono clock based on CLOCK_BOOTTIME.
		class boot_clock {
		public:
		typedef std::chrono::nanoseconds duration;
		typedef std::chrono::time_point<boot_clock, duration> time_point;

		} // namespace bootstat
		static time_point now();
		};

		#endif // UPTIME_PARSER_H_
		No newline at end of file
		} // namespace base
		} // namespace android

		#endif // ANDROID_BASE_CHRONO_UTILS_H

+0 −1