87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
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/*
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* Copyright 2004 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_EVENT_H_
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#define RTC_BASE_EVENT_H_
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#if defined(WEBRTC_WIN)
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#include <windows.h>
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#elif defined(WEBRTC_POSIX)
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#include <pthread.h>
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#else
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#error "Must define either WEBRTC_WIN or WEBRTC_POSIX."
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#endif
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namespace rtc {
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class Event {
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public:
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static const int kForever = -1;
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Event();
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Event(bool manual_reset, bool initially_signaled);
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Event(const Event&) = delete;
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Event& operator=(const Event&) = delete;
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~Event();
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void Set();
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void Reset();
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// Waits for the event to become signaled, but logs a warning if it takes more
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// than `warn_after_ms` milliseconds, and gives up completely if it takes more
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// than `give_up_after_ms` milliseconds. (If `warn_after_ms >=
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// give_up_after_ms`, no warning will be logged.) Either or both may be
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// `kForever`, which means wait indefinitely.
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//
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// Returns true if the event was signaled, false if there was a timeout or
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// some other error.
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bool Wait(int give_up_after_ms, int warn_after_ms);
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// Waits with the given timeout and a reasonable default warning timeout.
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bool Wait(int give_up_after_ms) {
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return Wait(give_up_after_ms,
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give_up_after_ms == kForever ? 3000 : kForever);
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}
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private:
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#if defined(WEBRTC_WIN)
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HANDLE event_handle_;
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#elif defined(WEBRTC_POSIX)
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pthread_mutex_t event_mutex_;
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pthread_cond_t event_cond_;
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const bool is_manual_reset_;
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bool event_status_;
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#endif
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};
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// These classes are provided for compatibility with Chromium.
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// The rtc::Event implementation is overriden inside of Chromium for the
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// purposes of detecting when threads are blocked that shouldn't be as well as
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// to use the more accurate event implementation that's there than is provided
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// by default on some platforms (e.g. Windows).
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// When building with standalone WebRTC, this class is a noop.
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// For further information, please see the
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// ScopedAllowBaseSyncPrimitives(ForTesting) classes in Chromium.
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class ScopedAllowBaseSyncPrimitives {
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public:
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ScopedAllowBaseSyncPrimitives() {}
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~ScopedAllowBaseSyncPrimitives() {}
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};
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class ScopedAllowBaseSyncPrimitivesForTesting {
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public:
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ScopedAllowBaseSyncPrimitivesForTesting() {}
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~ScopedAllowBaseSyncPrimitivesForTesting() {}
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};
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} // namespace rtc
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#endif // RTC_BASE_EVENT_H_
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