8ac8ecb1e1
Introduce a Fence class which models a synchronization primitive that allows to notify the availability of a resource. The Fence is modeled as a wrapper of a UniqueFD instance where read events are used to signal the Fence. The class can be later extended to support additional signalling mechanisms. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
31 lines
531 B
C++
31 lines
531 B
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2021, Google Inc.
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*
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* internal/fence.h - Synchronization fence
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*/
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#pragma once
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#include <libcamera/base/class.h>
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#include <libcamera/base/unique_fd.h>
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namespace libcamera {
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class Fence
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{
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public:
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Fence(UniqueFD fd);
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bool isValid() const { return fd_.isValid(); }
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const UniqueFD &fd() const { return fd_; }
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UniqueFD release() { return std::move(fd_); }
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private:
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LIBCAMERA_DISABLE_COPY_AND_MOVE(Fence)
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UniqueFD fd_;
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};
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} /* namespace libcamera */
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