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platform_system_core
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Merge "Fix logging in libsuspend"

This commit is contained in:
Treehugger Robot 2018-01-08 23:32:26 +00:00 committed by Gerrit Code Review
parent be10cae468 d5dc807475
commit ac4f4721a0
2 changed files with 48 additions and 60 deletions
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1
libsuspend/Android.bp
View File

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

107
libsuspend/autosuspend_wakeup_count.cpp
View File

@ -17,7 +17,6 @@
#define LOG_TAG "libsuspend"
//#define LOG_NDEBUG 0
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <semaphore.h>
@ -29,22 +28,29 @@
#include <sys/types.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"
#define SYS_POWER_STATE "/sys/power/state"
#define SYS_POWER_WAKEUP_COUNT "/sys/power/wakeup_count"
#define BASE_SLEEP_TIME 100000
#define MAX_SLEEP_TIME 60000000
static int state_fd;
static int wakeup_count_fd;
using android::base::ReadFdToString;
using android::base::Trim;
using android::base::WriteStringToFd;
static pthread_t suspend_thread;
static sem_t suspend_lockout;
static const char* sleep_state = "mem";
static void (*wakeup_func)(bool success) = NULL;
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) {
if (success) {
@ -52,13 +58,10 @@ static void update_sleep_time(bool success) {
return;
}
// 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))) {
char buf[80];
char wakeup_count[20];
int wakeup_count_len;
int ret;
bool success = true;
@ -66,95 +69,84 @@ static void* suspend_thread_func(void* arg __attribute__((unused))) {
update_sleep_time(success);
usleep(sleep_time);
success = false;
ALOGV("%s: read wakeup_count", __func__);
LOG(VERBOSE) << "read wakeup_count";
lseek(wakeup_count_fd, 0, SEEK_SET);
wakeup_count_len =
TEMP_FAILURE_RETRY(read(wakeup_count_fd, wakeup_count, sizeof(wakeup_count)));
if (wakeup_count_len < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error reading from %s: %s", SYS_POWER_WAKEUP_COUNT, buf);
wakeup_count_len = 0;
continue;
}
if (!wakeup_count_len) {
ALOGE("Empty wakeup count");
std::string wakeup_count;
if (!ReadFdToString(wakeup_count_fd, &wakeup_count)) {
PLOG(ERROR) << "error reading from " << sys_power_wakeup_count;
continue;
}
ALOGV("%s: wait", __func__);
wakeup_count = Trim(wakeup_count);
if (wakeup_count.empty()) {
LOG(ERROR) << "empty wakeup count";
continue;
}
LOG(VERBOSE) << "wait";
ret = sem_wait(&suspend_lockout);
if (ret < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error waiting on semaphore: %s", buf);
PLOG(ERROR) << "error waiting on semaphore";
continue;
}
ALOGV("%s: write %*s to wakeup_count", __func__, wakeup_count_len, wakeup_count);
ret = TEMP_FAILURE_RETRY(write(wakeup_count_fd, wakeup_count, wakeup_count_len));
if (ret < 0) {
strerror_r(errno, buf, sizeof(buf));
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;
}
LOG(VERBOSE) << "write " << wakeup_count << " to wakeup_count";
if (WriteStringToFd(wakeup_count, wakeup_count_fd)) {
LOG(VERBOSE) << "write " << sleep_state << " to " << sys_power_state;
success = WriteStringToFd(sleep_state, state_fd);
void (*func)(bool success) = wakeup_func;
if (func != NULL) {
(*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);
if (ret < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error releasing semaphore: %s", buf);
PLOG(ERROR) << "error releasing semaphore";
}
}
return NULL;
}
static int autosuspend_wakeup_count_enable(void) {
char buf[80];
int ret;
ALOGV("autosuspend_wakeup_count_enable");
LOG(VERBOSE) << "autosuspend_wakeup_count_enable";
ret = sem_post(&suspend_lockout);
if (ret < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error changing semaphore: %s", buf);
PLOG(ERROR) << "error changing semaphore";
}
ALOGV("autosuspend_wakeup_count_enable done");
LOG(VERBOSE) << "autosuspend_wakeup_count_enable done";
return ret;
}
static int autosuspend_wakeup_count_disable(void) {
char buf[80];
int ret;
ALOGV("autosuspend_wakeup_count_disable");
LOG(VERBOSE) << "autosuspend_wakeup_count_disable";
ret = sem_wait(&suspend_lockout);
if (ret < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error changing semaphore: %s", buf);
PLOG(ERROR) << "error changing semaphore";
}
ALOGV("autosuspend_wakeup_count_disable done");
LOG(VERBOSE) << "autosuspend_wakeup_count_disable done";
return ret;
}
static void autosuspend_set_wakeup_callback(void (*func)(bool success)) {
if (wakeup_func != NULL) {
ALOGE("Duplicate wakeup callback applied, keeping original");
LOG(ERROR) << "duplicate wakeup callback applied, keeping original";
return;
}
wakeup_func = func;
@ -168,36 +160,31 @@ struct autosuspend_ops autosuspend_wakeup_count_ops = {
struct autosuspend_ops* autosuspend_wakeup_count_init(void) {
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) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error opening %s: %s", SYS_POWER_STATE, buf);
PLOG(ERROR) << "error opening " << sys_power_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) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error opening %s: %s", SYS_POWER_WAKEUP_COUNT, buf);
PLOG(ERROR) << "error opening " << sys_power_wakeup_count;
goto err_open_wakeup_count;
}
ret = sem_init(&suspend_lockout, 0, 0);
if (ret < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error creating semaphore: %s", buf);
PLOG(ERROR) << "error creating semaphore";
goto err_sem_init;
}
ret = pthread_create(&suspend_thread, NULL, suspend_thread_func, NULL);
if (ret) {
strerror_r(ret, buf, sizeof(buf));
ALOGE("Error creating thread: %s", buf);
LOG(ERROR) << "error creating thread: " << strerror(ret);
goto err_pthread_create;
}
ALOGI("Selected wakeup count");
LOG(INFO) << "selected wakeup count";
return &autosuspend_wakeup_count_ops;
err_pthread_create: