You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
137 lines
3.6 KiB
137 lines
3.6 KiB
/*
|
|
* Copyright (C) 2016 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 "wificond/looper_backed_event_loop.h"
|
|
|
|
#include <android-base/logging.h>
|
|
#include <utils/Looper.h>
|
|
#include <utils/Timers.h>
|
|
|
|
namespace {
|
|
|
|
class EventLoopCallback : public android::MessageHandler {
|
|
public:
|
|
explicit EventLoopCallback(const std::function<void()>& callback)
|
|
: callback_(callback) {
|
|
}
|
|
|
|
~EventLoopCallback() override = default;
|
|
|
|
void handleMessage(const android::Message& message) override {
|
|
callback_();
|
|
}
|
|
|
|
private:
|
|
const std::function<void()> callback_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(EventLoopCallback);
|
|
};
|
|
|
|
class WatchFdCallback : public android::LooperCallback {
|
|
public:
|
|
explicit WatchFdCallback(const std::function<void(int)>& callback)
|
|
: callback_(callback) {
|
|
}
|
|
|
|
~WatchFdCallback() override = default;
|
|
|
|
virtual int handleEvent(int fd, int events, void* data) {
|
|
callback_(fd);
|
|
// Returning 1 means Looper keeps watching this file descriptor after
|
|
// callback is called.
|
|
// See Looper.h for details.
|
|
return 1;
|
|
}
|
|
|
|
private:
|
|
const std::function<void(int)> callback_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(WatchFdCallback);
|
|
};
|
|
|
|
} // namespace
|
|
|
|
namespace android {
|
|
namespace wificond {
|
|
|
|
|
|
LooperBackedEventLoop::LooperBackedEventLoop()
|
|
: should_continue_(true) {
|
|
looper_ = android::Looper::prepare(Looper::PREPARE_ALLOW_NON_CALLBACKS);
|
|
}
|
|
|
|
LooperBackedEventLoop::~LooperBackedEventLoop() {
|
|
}
|
|
|
|
void LooperBackedEventLoop::PostTask(const std::function<void()>& callback) {
|
|
looper_->sendMessage(sp<EventLoopCallback>::make(callback), Message());
|
|
}
|
|
|
|
void LooperBackedEventLoop::PostDelayedTask(
|
|
const std::function<void()>& callback,
|
|
int64_t delay_ms) {
|
|
looper_->sendMessageDelayed(ms2ns(delay_ms), sp<EventLoopCallback>::make(callback), Message());
|
|
}
|
|
|
|
bool LooperBackedEventLoop::WatchFileDescriptor(
|
|
int fd,
|
|
ReadyMode mode,
|
|
const std::function<void(int)>& callback) {
|
|
sp<android::LooperCallback> watch_fd_callback = new WatchFdCallback(callback);
|
|
int event;
|
|
if (mode == kModeInput) {
|
|
event = Looper::EVENT_INPUT;
|
|
} else if (mode == kModeOutput) {
|
|
event = Looper::EVENT_OUTPUT;
|
|
} else {
|
|
LOG(ERROR) << "Invalid mode for WatchFileDescriptor().";
|
|
return false;
|
|
}
|
|
// addFd() returns 1 if descriptor was added, 0 if arguments were invalid.
|
|
// Since we are using non-NULL callback, the second parameter 'ident' will
|
|
// always be ignored. It is OK to use 0 for 'ident'.
|
|
// See Looper.h for more details.
|
|
if (looper_->addFd(fd, 0, event, watch_fd_callback, NULL) == 0) {
|
|
LOG(ERROR) << "Invalid arguments for Looper::addFd().";
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool LooperBackedEventLoop::StopWatchFileDescriptor(int fd) {
|
|
if (looper_->removeFd(fd) == 1) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void LooperBackedEventLoop::Poll() {
|
|
while (should_continue_) {
|
|
looper_->pollOnce(-1);
|
|
}
|
|
}
|
|
|
|
void LooperBackedEventLoop::PollForOne(int timeout_millis) {
|
|
looper_->pollOnce(timeout_millis);
|
|
}
|
|
|
|
void LooperBackedEventLoop::TriggerExit() {
|
|
PostTask([this](){ should_continue_ = false; });
|
|
}
|
|
|
|
} // namespace wificond
|
|
} // namespace android
|