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/*
* Author: Petre Eftime <petre.p.eftime@intel.com>
* Copyright (c) 2015 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <string>
#include <condition_variable>
#include <atomic>
#include <functional>
#include "BluetoothObject.hpp"
#pragma once
using namespace tinyb;
typedef std::function<void (BluetoothObject &, void *)> BluetoothCallback;
class tinyb::BluetoothEvent {
private:
std::string *name;
std::string *identifier;
BluetoothObject *parent;
BluetoothType type;
bool execute_once;
BluetoothCallback cb;
void *data;
bool canceled;
class BluetoothConditionVariable {
friend class BluetoothEvent;
std::condition_variable cv;
std::mutex lock;
BluetoothObject *result;
std::atomic_bool triggered;
std::atomic_uint waiting;
BluetoothConditionVariable() : cv(), lock() {
result = nullptr;
waiting = 0;
triggered = false;
}
BluetoothObject *wait() {
if (result != nullptr)
return result;
if (!triggered) {
std::unique_lock<std::mutex> lk(lock);
waiting++;
cv.wait(lk);
waiting--;
}
return result;
}
BluetoothObject *wait_for(std::chrono::milliseconds timeout) {
if (result != nullptr)
return result;
if (!triggered) {
waiting++;
std::unique_lock<std::mutex> lk(lock);
cv.wait_for(lk, timeout);
waiting--;
}
return result;
}
void notify() {
triggered = true;
while (waiting != 0)
cv.notify_all();
}
~BluetoothConditionVariable() {
notify();
}
};
BluetoothConditionVariable cv;
static void generic_callback(BluetoothObject &object, void *data);
public:
BluetoothEvent(BluetoothType type, std::string *name, std::string *identifier,
BluetoothObject *parent, bool execute_once = true,
BluetoothCallback cb = nullptr, void *data = NULL);
~BluetoothEvent();
BluetoothType get_type() const {
return type;
}
std::string *get_name() const {
return name;
}
std::string *get_identifier() const {
return identifier;
}
BluetoothObject *get_parent() const {
return parent;
}
bool execute_callback(BluetoothObject &object);
bool has_callback() {
return (cb != NULL);
}
BluetoothObject *get_result() {
return cv.result;
}
void cancel();
void wait(std::chrono::milliseconds timeout = std::chrono::milliseconds::zero());
bool operator==(BluetoothEvent const &other);
};
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