b5d26eab4d
This annotates member functions and variables of Semaphore by clang thread safety annotations. Signed-off-by: Hirokazu Honda <hiroh@chromium.org> Signed-off-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
33 lines
714 B
C++
33 lines
714 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/mutex.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() LIBCAMERA_TSA_EXCLUDES(mutex_);
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void acquire(unsigned int n = 1) LIBCAMERA_TSA_EXCLUDES(mutex_);
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bool tryAcquire(unsigned int n = 1) LIBCAMERA_TSA_EXCLUDES(mutex_);
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void release(unsigned int n = 1) LIBCAMERA_TSA_EXCLUDES(mutex_);
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private:
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Mutex mutex_;
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ConditionVariable cv_;
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unsigned int available_ LIBCAMERA_TSA_GUARDED_BY(mutex_);
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};
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} /* namespace libcamera */
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