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//
// Copyright 2020 The ANGLE 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.
//
// EGLReusableSync.cpp: Implements the egl::ReusableSync class.
#include "libANGLE/renderer/EGLReusableSync.h"
#include "libANGLE/Context.h"
#include "libANGLE/renderer/ContextImpl.h"
namespace rx
{
ReusableSync::ReusableSync(const egl::AttributeMap &attribs)
: EGLSyncImpl(), mStatus(EGL_UNSIGNALED)
{}
void ReusableSync::onDestroy(const egl::Display *display) {}
ReusableSync::~ReusableSync()
{
// Release any waiting thread.
mCondVar.notify_all();
}
egl::Error ReusableSync::initialize(const egl::Display *display,
const gl::Context *context,
EGLenum type)
{
return egl::NoError();
}
egl::Error ReusableSync::clientWait(const egl::Display *display,
const gl::Context *context,
EGLint flags,
EGLTime timeout,
EGLint *outResult)
{
if (mStatus == EGL_SIGNALED)
{
*outResult = EGL_CONDITION_SATISFIED_KHR;
return egl::NoError();
}
if (((flags & EGL_SYNC_FLUSH_COMMANDS_BIT) != 0) && (context != nullptr))
{
angle::Result result = context->getImplementation()->flush(context);
if (result != angle::Result::Continue)
{
return ResultToEGL(result);
}
}
if (timeout == 0)
{
*outResult = EGL_TIMEOUT_EXPIRED_KHR;
return egl::NoError();
}
using NanoSeconds = std::chrono::duration<int64_t, std::nano>;
NanoSeconds duration = (timeout == EGL_FOREVER) ? NanoSeconds::max() : NanoSeconds(timeout);
std::cv_status waitStatus = std::cv_status::no_timeout;
mMutex.lock();
waitStatus = mCondVar.wait_for(mMutex, duration);
mMutex.unlock();
switch (waitStatus)
{
case std::cv_status::no_timeout: // Signaled.
*outResult = EGL_CONDITION_SATISFIED_KHR;
break;
case std::cv_status::timeout: // Timed-out.
*outResult = EGL_TIMEOUT_EXPIRED_KHR;
break;
default:
break;
}
return egl::NoError();
}
egl::Error ReusableSync::serverWait(const egl::Display *display,
const gl::Context *context,
EGLint flags)
{
// Does not support server wait.
return egl::EglBadMatch();
}
egl::Error ReusableSync::signal(const egl::Display *display,
const gl::Context *context,
EGLint mode)
{
if (mode == EGL_SIGNALED)
{
if (mStatus == EGL_UNSIGNALED)
{
// Release all threads.
mCondVar.notify_all();
}
mStatus = EGL_SIGNALED;
}
else
{
mStatus = EGL_UNSIGNALED;
}
return egl::NoError();
}
egl::Error ReusableSync::getStatus(const egl::Display *display, EGLint *outStatus)
{
*outStatus = mStatus;
return egl::NoError();
}
} // namespace rx
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