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/*
* Copyright 2017 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef RTC_BASE_SIGSLOTREPEATER_H__
#define RTC_BASE_SIGSLOTREPEATER_H__
// repeaters are both signals and slots, which are designed as intermediate
// pass-throughs for signals and slots which don't know about each other (for
// modularity or encapsulation). This eliminates the need to declare a signal
// handler whose sole purpose is to fire another signal. The repeater connects
// to the originating signal using the 'repeat' method. When the repeated
// signal fires, the repeater will also fire.
//
// TODO(deadbeef): Actually use this, after we decide on some style points on
// using signals, so it doesn't get deleted again.
#include "rtc_base/sigslot.h"
namespace sigslot {
template <class mt_policy, typename... Args>
class repeater_with_thread_policy
: public signal_with_thread_policy<mt_policy, Args...>,
public has_slots<mt_policy> {
private:
// These typedefs are just to make the code below more readable. Code using
// repeaters shouldn't need to reference these types directly.
typedef signal_with_thread_policy<mt_policy, Args...> base_type;
typedef repeater_with_thread_policy<mt_policy, Args...> this_type;
public:
repeater_with_thread_policy() {}
repeater_with_thread_policy(const this_type& s) : base_type(s) {}
void reemit(Args... args) { base_type::emit(args...); }
void repeat(base_type& s) { s.connect(this, &this_type::reemit); }
void stop(base_type& s) { s.disconnect(this); }
};
// Alias with default thread policy. Needed because both default arguments
// and variadic template arguments must go at the end of the list, so we
// can't have both at once.
template <typename... Args>
using repeater =
repeater_with_thread_policy<SIGSLOT_DEFAULT_MT_POLICY, Args...>;
} // namespace sigslot
#endif // RTC_BASE_SIGSLOTREPEATER_H__
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