Merge "Fix logging in libsuspend" (ac4f4721) · Commits · e / os / android_system_core

libsuspend/Android.bp

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -14,6 +14,7 @@ cc_library {
	export_include_dirs: ["include"],		export_include_dirs: ["include"],
	local_include_dirs: ["include"],		local_include_dirs: ["include"],
	shared_libs: [		shared_libs: [
			"libbase",
	"liblog",		"liblog",
	"libcutils",		"libcutils",
	],		],

libsuspend/autosuspend_wakeup_count.cpp

+45 −58

Original line number	Original line	Diff line number	Diff line
	@@ -17,7 +17,6 @@
	#define LOG_TAG "libsuspend"		#define LOG_TAG "libsuspend"
	//#define LOG_NDEBUG 0		//#define LOG_NDEBUG 0

	#include <errno.h>
	#include <fcntl.h>		#include <fcntl.h>
	#include <pthread.h>		#include <pthread.h>
	#include <semaphore.h>		#include <semaphore.h>
	@@ -29,22 +28,29 @@
	#include <sys/types.h>		#include <sys/types.h>
	#include <unistd.h>		#include <unistd.h>

	#include <log/log.h>		#include <android-base/file.h>
			#include <android-base/logging.h>
			#include <android-base/strings.h>

	#include "autosuspend_ops.h"		#include "autosuspend_ops.h"

	#define SYS_POWER_STATE "/sys/power/state"
	#define SYS_POWER_WAKEUP_COUNT "/sys/power/wakeup_count"

	#define BASE_SLEEP_TIME 100000		#define BASE_SLEEP_TIME 100000
			#define MAX_SLEEP_TIME 60000000

	static int state_fd;		static int state_fd;
	static int wakeup_count_fd;		static int wakeup_count_fd;

			using android::base::ReadFdToString;
			using android::base::Trim;
			using android::base::WriteStringToFd;

	static pthread_t suspend_thread;		static pthread_t suspend_thread;
	static sem_t suspend_lockout;		static sem_t suspend_lockout;
	static const char* sleep_state = "mem";		static const char* sleep_state = "mem";
	static void (*wakeup_func)(bool success) = NULL;		static void (*wakeup_func)(bool success) = NULL;
	static int sleep_time = BASE_SLEEP_TIME;		static int sleep_time = BASE_SLEEP_TIME;
			static constexpr char sys_power_state[] = "/sys/power/state";
			static constexpr char sys_power_wakeup_count[] = "/sys/power/wakeup_count";

	static void update_sleep_time(bool success) {		static void update_sleep_time(bool success) {
	if (success) {		if (success) {
	@@ -52,13 +58,10 @@ static void update_sleep_time(bool success) {
	return;		return;
	}		}
	// double sleep time after each failure up to one minute		// double sleep time after each failure up to one minute
	sleep_time = MIN(sleep_time * 2, 60000000);		sleep_time = MIN(sleep_time * 2, MAX_SLEEP_TIME);
	}		}

	static void* suspend_thread_func(void* arg __attribute__((unused))) {		static void* suspend_thread_func(void* arg __attribute__((unused))) {
	char buf[80];
	char wakeup_count[20];
	int wakeup_count_len;
	int ret;		int ret;
	bool success = true;		bool success = true;

	@@ -66,95 +69,84 @@ static void* suspend_thread_func(void* arg __attribute__((unused))) {
	update_sleep_time(success);		update_sleep_time(success);
	usleep(sleep_time);		usleep(sleep_time);
	success = false;		success = false;
	ALOGV("%s: read wakeup_count", __func__);		LOG(VERBOSE) << "read wakeup_count";
	lseek(wakeup_count_fd, 0, SEEK_SET);		lseek(wakeup_count_fd, 0, SEEK_SET);
	wakeup_count_len =		std::string wakeup_count;
	TEMP_FAILURE_RETRY(read(wakeup_count_fd, wakeup_count, sizeof(wakeup_count)));		if (!ReadFdToString(wakeup_count_fd, &wakeup_count)) {
	if (wakeup_count_len < 0) {		PLOG(ERROR) << "error reading from " << sys_power_wakeup_count;
	strerror_r(errno, buf, sizeof(buf));
	ALOGE("Error reading from %s: %s", SYS_POWER_WAKEUP_COUNT, buf);
	wakeup_count_len = 0;
	continue;		continue;
	}		}
	if (!wakeup_count_len) {
	ALOGE("Empty wakeup count");		wakeup_count = Trim(wakeup_count);
			if (wakeup_count.empty()) {
			LOG(ERROR) << "empty wakeup count";
	continue;		continue;
	}		}

	ALOGV("%s: wait", __func__);		LOG(VERBOSE) << "wait";
	ret = sem_wait(&suspend_lockout);		ret = sem_wait(&suspend_lockout);
	if (ret < 0) {		if (ret < 0) {
	strerror_r(errno, buf, sizeof(buf));		PLOG(ERROR) << "error waiting on semaphore";
	ALOGE("Error waiting on semaphore: %s", buf);
	continue;		continue;
	}		}

	ALOGV("%s: write %*s to wakeup_count", __func__, wakeup_count_len, wakeup_count);		LOG(VERBOSE) << "write " << wakeup_count << " to wakeup_count";
	ret = TEMP_FAILURE_RETRY(write(wakeup_count_fd, wakeup_count, wakeup_count_len));		if (WriteStringToFd(wakeup_count, wakeup_count_fd)) {
	if (ret < 0) {		LOG(VERBOSE) << "write " << sleep_state << " to " << sys_power_state;
	strerror_r(errno, buf, sizeof(buf));		success = WriteStringToFd(sleep_state, state_fd);
	ALOGE("Error writing to %s: %s", SYS_POWER_WAKEUP_COUNT, buf);
	} else {
	ALOGV("%s: write %s to %s", __func__, sleep_state, SYS_POWER_STATE);
	ret = TEMP_FAILURE_RETRY(write(state_fd, sleep_state, strlen(sleep_state)));
	if (ret >= 0) {
	success = true;
	}
	void (*func)(bool success) = wakeup_func;		void (*func)(bool success) = wakeup_func;
	if (func != NULL) {		if (func != NULL) {
	(*func)(success);		(*func)(success);
	}		}
			} else {
			PLOG(ERROR) << "error writing to " << sys_power_wakeup_count;
	}		}

	ALOGV("%s: release sem", __func__);		LOG(VERBOSE) << "release sem";
	ret = sem_post(&suspend_lockout);		ret = sem_post(&suspend_lockout);
	if (ret < 0) {		if (ret < 0) {
	strerror_r(errno, buf, sizeof(buf));		PLOG(ERROR) << "error releasing semaphore";
	ALOGE("Error releasing semaphore: %s", buf);
	}		}
	}		}
	return NULL;		return NULL;
	}		}

	static int autosuspend_wakeup_count_enable(void) {		static int autosuspend_wakeup_count_enable(void) {
	char buf[80];
	int ret;		int ret;

	ALOGV("autosuspend_wakeup_count_enable");		LOG(VERBOSE) << "autosuspend_wakeup_count_enable";

	ret = sem_post(&suspend_lockout);		ret = sem_post(&suspend_lockout);

	if (ret < 0) {		if (ret < 0) {
	strerror_r(errno, buf, sizeof(buf));		PLOG(ERROR) << "error changing semaphore";
	ALOGE("Error changing semaphore: %s", buf);
	}		}

	ALOGV("autosuspend_wakeup_count_enable done");		LOG(VERBOSE) << "autosuspend_wakeup_count_enable done";

	return ret;		return ret;
	}		}

	static int autosuspend_wakeup_count_disable(void) {		static int autosuspend_wakeup_count_disable(void) {
	char buf[80];
	int ret;		int ret;

	ALOGV("autosuspend_wakeup_count_disable");		LOG(VERBOSE) << "autosuspend_wakeup_count_disable";

	ret = sem_wait(&suspend_lockout);		ret = sem_wait(&suspend_lockout);

	if (ret < 0) {		if (ret < 0) {
	strerror_r(errno, buf, sizeof(buf));		PLOG(ERROR) << "error changing semaphore";
	ALOGE("Error changing semaphore: %s", buf);
	}		}

	ALOGV("autosuspend_wakeup_count_disable done");		LOG(VERBOSE) << "autosuspend_wakeup_count_disable done";

	return ret;		return ret;
	}		}

	static void autosuspend_set_wakeup_callback(void (*func)(bool success)) {		static void autosuspend_set_wakeup_callback(void (*func)(bool success)) {
	if (wakeup_func != NULL) {		if (wakeup_func != NULL) {
	ALOGE("Duplicate wakeup callback applied, keeping original");		LOG(ERROR) << "duplicate wakeup callback applied, keeping original";
	return;		return;
	}		}
	wakeup_func = func;		wakeup_func = func;
	@@ -168,36 +160,31 @@ struct autosuspend_ops autosuspend_wakeup_count_ops = {

	struct autosuspend_ops* autosuspend_wakeup_count_init(void) {		struct autosuspend_ops* autosuspend_wakeup_count_init(void) {
	int ret;		int ret;
	char buf[80];

	state_fd = TEMP_FAILURE_RETRY(open(SYS_POWER_STATE, O_RDWR));		state_fd = TEMP_FAILURE_RETRY(open(sys_power_state, O_RDWR));
	if (state_fd < 0) {		if (state_fd < 0) {
	strerror_r(errno, buf, sizeof(buf));		PLOG(ERROR) << "error opening " << sys_power_state;
	ALOGE("Error opening %s: %s", SYS_POWER_STATE, buf);
	goto err_open_state;		goto err_open_state;
	}		}

	wakeup_count_fd = TEMP_FAILURE_RETRY(open(SYS_POWER_WAKEUP_COUNT, O_RDWR));		wakeup_count_fd = TEMP_FAILURE_RETRY(open(sys_power_wakeup_count, O_RDWR));
	if (wakeup_count_fd < 0) {		if (wakeup_count_fd < 0) {
	strerror_r(errno, buf, sizeof(buf));		PLOG(ERROR) << "error opening " << sys_power_wakeup_count;
	ALOGE("Error opening %s: %s", SYS_POWER_WAKEUP_COUNT, buf);
	goto err_open_wakeup_count;		goto err_open_wakeup_count;
	}		}

	ret = sem_init(&suspend_lockout, 0, 0);		ret = sem_init(&suspend_lockout, 0, 0);
	if (ret < 0) {		if (ret < 0) {
	strerror_r(errno, buf, sizeof(buf));		PLOG(ERROR) << "error creating semaphore";
	ALOGE("Error creating semaphore: %s", buf);
	goto err_sem_init;		goto err_sem_init;
	}		}
	ret = pthread_create(&suspend_thread, NULL, suspend_thread_func, NULL);		ret = pthread_create(&suspend_thread, NULL, suspend_thread_func, NULL);
	if (ret) {		if (ret) {
	strerror_r(ret, buf, sizeof(buf));		LOG(ERROR) << "error creating thread: " << strerror(ret);
	ALOGE("Error creating thread: %s", buf);
	goto err_pthread_create;		goto err_pthread_create;
	}		}

	ALOGI("Selected wakeup count");		LOG(INFO) << "selected wakeup count";
	return &autosuspend_wakeup_count_ops;		return &autosuspend_wakeup_count_ops;

	err_pthread_create:		err_pthread_create: