PawletOS/android_bootable_recovery
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recovery: c++ify pthread use in UI

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Change pthread usage to std::mutex,
lock_guard, unique_lock, thread, or
condition_variable as appropriate.

Test: Recovery works, recovery_component_test pass
Bug: 78793464
Change-Id: Ibf0b1bbedcf0b6e32fc4ee6aaadd17f21b4d7077
This commit is contained in:
Jerry Zhang
2018-05-21 16:04:57 -07:00
parent 26ea9591bc
commit b31f9ce6d1
5 changed files with 86 additions and 126 deletions
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ui.cpp
+36 -53
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@@ -18,8 +18,6 @@
#include <errno.h>
#include <fcntl.h>
#include <linux/input.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -74,8 +72,6 @@ RecoveryUI::RecoveryUI()
touch_slot_(0),
is_bootreason_recovery_ui_(false),
screensaver_state_(ScreensaverState::DISABLED) {
pthread_mutex_init(&key_queue_mutex, nullptr);
pthread_cond_init(&key_queue_cond, nullptr);
memset(key_pressed, 0, sizeof(key_pressed));
}
@@ -341,25 +337,25 @@ void RecoveryUI::ProcessKey(int key_code, int updown) {
bool register_key = false;
bool long_press = false;
pthread_mutex_lock(&key_queue_mutex);
key_pressed[key_code] = updown;
if (updown) {
++key_down_count;
key_last_down = key_code;
key_long_press = false;
std::thread time_key_thread(&RecoveryUI::TimeKey, this, key_code, key_down_count);
time_key_thread.detach();
} else {
if (key_last_down == key_code) {
long_press = key_long_press;
register_key = true;
{
std::lock_guard<std::mutex> lg(key_queue_mutex);
key_pressed[key_code] = updown;
if (updown) {
++key_down_count;
key_last_down = key_code;
key_long_press = false;
std::thread time_key_thread(&RecoveryUI::TimeKey, this, key_code, key_down_count);
time_key_thread.detach();
} else {
if (key_last_down == key_code) {
long_press = key_long_press;
register_key = true;
}
key_last_down = -1;
}
key_last_down = -1;
}
bool reboot_enabled = enable_reboot;
pthread_mutex_unlock(&key_queue_mutex);
bool reboot_enabled = enable_reboot;
if (register_key) {
switch (CheckKey(key_code, long_press)) {
case RecoveryUI::IGNORE:
@@ -388,44 +384,37 @@ void RecoveryUI::ProcessKey(int key_code, int updown) {
void RecoveryUI::TimeKey(int key_code, int count) {
std::this_thread::sleep_for(750ms); // 750 ms == "long"
bool long_press = false;
pthread_mutex_lock(&key_queue_mutex);
if (key_last_down == key_code && key_down_count == count) {
long_press = key_long_press = true;
{
std::lock_guard<std::mutex> lg(key_queue_mutex);
if (key_last_down == key_code && key_down_count == count) {
long_press = key_long_press = true;
}
}
pthread_mutex_unlock(&key_queue_mutex);
if (long_press) KeyLongPress(key_code);
}
void RecoveryUI::EnqueueKey(int key_code) {
pthread_mutex_lock(&key_queue_mutex);
std::lock_guard<std::mutex> lg(key_queue_mutex);
const int queue_max = sizeof(key_queue) / sizeof(key_queue[0]);
if (key_queue_len < queue_max) {
key_queue[key_queue_len++] = key_code;
pthread_cond_signal(&key_queue_cond);
key_queue_cond.notify_one();
}
pthread_mutex_unlock(&key_queue_mutex);
}
int RecoveryUI::WaitKey() {
pthread_mutex_lock(&key_queue_mutex);
std::unique_lock<std::mutex> lk(key_queue_mutex);
// Time out after UI_WAIT_KEY_TIMEOUT_SEC, unless a USB cable is
// plugged in.
do {
struct timeval now;
struct timespec timeout;
gettimeofday(&now, nullptr);
timeout.tv_sec = now.tv_sec;
timeout.tv_nsec = now.tv_usec * 1000;
timeout.tv_sec += UI_WAIT_KEY_TIMEOUT_SEC;
int rc = 0;
while (key_queue_len == 0 && rc != ETIMEDOUT) {
rc = pthread_cond_timedwait(&key_queue_cond, &key_queue_mutex, &timeout);
std::cv_status rc = std::cv_status::no_timeout;
while (key_queue_len == 0 && rc != std::cv_status::timeout) {
rc = key_queue_cond.wait_for(lk, std::chrono::seconds(UI_WAIT_KEY_TIMEOUT_SEC));
}
if (screensaver_state_ != ScreensaverState::DISABLED) {
if (rc == ETIMEDOUT) {
if (rc == std::cv_status::timeout) {
// Lower the brightness level: NORMAL -> DIMMED; DIMMED -> OFF.
if (screensaver_state_ == ScreensaverState::NORMAL) {
if (android::base::WriteStringToFile(std::to_string(brightness_dimmed_value_),
@@ -464,7 +453,6 @@ int RecoveryUI::WaitKey() {
key = key_queue[0];
memcpy(&key_queue[0], &key_queue[1], sizeof(int) * --key_queue_len);
}
pthread_mutex_unlock(&key_queue_mutex);
return key;
}
@@ -485,16 +473,14 @@ bool RecoveryUI::IsUsbConnected() {
}
bool RecoveryUI::IsKeyPressed(int key) {
pthread_mutex_lock(&key_queue_mutex);
std::lock_guard<std::mutex> lg(key_queue_mutex);
int pressed = key_pressed[key];
pthread_mutex_unlock(&key_queue_mutex);
return pressed;
}
bool RecoveryUI::IsLongPress() {
pthread_mutex_lock(&key_queue_mutex);
std::lock_guard<std::mutex> lg(key_queue_mutex);
bool result = key_long_press;
pthread_mutex_unlock(&key_queue_mutex);
return result;
}
@@ -511,15 +497,15 @@ bool RecoveryUI::HasTouchScreen() const {
}
void RecoveryUI::FlushKeys() {
pthread_mutex_lock(&key_queue_mutex);
std::lock_guard<std::mutex> lg(key_queue_mutex);
key_queue_len = 0;
pthread_mutex_unlock(&key_queue_mutex);
}
RecoveryUI::KeyAction RecoveryUI::CheckKey(int key, bool is_long_press) {
pthread_mutex_lock(&key_queue_mutex);
key_long_press = false;
pthread_mutex_unlock(&key_queue_mutex);
{
std::lock_guard<std::mutex> lg(key_queue_mutex);
key_long_press = false;
}
// If we have power and volume up keys, that chord is the signal to toggle the text display.
if (HasThreeButtons() || (HasPowerKey() && HasTouchScreen() && touch_screen_allowed_)) {
@@ -542,9 +528,7 @@ RecoveryUI::KeyAction RecoveryUI::CheckKey(int key, bool is_long_press) {
// Press power seven times in a row to reboot.
if (key == KEY_POWER) {
pthread_mutex_lock(&key_queue_mutex);
bool reboot_enabled = enable_reboot;
pthread_mutex_unlock(&key_queue_mutex);
if (reboot_enabled) {
++consecutive_power_keys;
@@ -564,7 +548,6 @@ void RecoveryUI::KeyLongPress(int) {
}
void RecoveryUI::SetEnableReboot(bool enabled) {
pthread_mutex_lock(&key_queue_mutex);
std::lock_guard<std::mutex> lg(key_queue_mutex);
enable_reboot = enabled;
pthread_mutex_unlock(&key_queue_mutex);
}