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