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