Hirokazu HondaandLaurent Pinchart
923cf7f40a
ConditionVariable is alias to std::condition_variable. This replaces std::condition_variable with the ConditionVariable. It enables replacing ConditionVariable implementation easily in the following patches. Signed-off-by: Hirokazu Honda <hiroh@chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
32 lines
557 B
C++
32 lines
557 B
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2019, Google Inc.
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*
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* semaphore.h - General-purpose counting semaphore
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*/
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#pragma once
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#include <libcamera/base/private.h>
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#include <libcamera/base/thread.h>
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namespace libcamera {
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class Semaphore
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{
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public:
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Semaphore(unsigned int n = 0);
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unsigned int available();
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void acquire(unsigned int n = 1);
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bool tryAcquire(unsigned int n = 1);
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void release(unsigned int n = 1);
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private:
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Mutex mutex_;
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ConditionVariable cv_;
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unsigned int available_;
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};
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} /* namespace libcamera */
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