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/*
* Copyright 2019-2021 Diligent Graphics LLC
* Copyright 2015-2019 Egor Yusov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* In no event and under no legal theory, whether in tort (including negligence),
* contract, or otherwise, unless required by applicable law (such as deliberate
* and grossly negligent acts) or agreed to in writing, shall any Contributor be
* liable for any damages, including any direct, indirect, special, incidental,
* or consequential damages of any character arising as a result of this License or
* out of the use or inability to use the software (including but not limited to damages
* for loss of goodwill, work stoppage, computer failure or malfunction, or any and
* all other commercial damages or losses), even if such Contributor has been advised
* of the possibility of such damages.
*/
#include "pch.h"
#include "FenceGLImpl.hpp"
#include "RenderDeviceGLImpl.hpp"
#include "EngineMemory.h"
namespace Diligent
{
FenceGLImpl::FenceGLImpl(IReferenceCounters* pRefCounters,
RenderDeviceGLImpl* pDevice,
const FenceDesc& Desc) :
// clang-format off
TFenceBase
{
pRefCounters,
pDevice,
Desc
}
// clang-format on
{
}
FenceGLImpl::~FenceGLImpl()
{
}
Uint64 FenceGLImpl::GetCompletedValue()
{
while (!m_PendingFences.empty())
{
auto& val_fence = m_PendingFences.front();
auto res =
glClientWaitSync(val_fence.second,
0, // Can be SYNC_FLUSH_COMMANDS_BIT
0 // Timeout in nanoseconds
);
if (res == GL_ALREADY_SIGNALED)
{
UpdateLastCompletedFenceValue(val_fence.first);
m_PendingFences.pop_front();
}
else
{
break;
}
}
return m_LastCompletedFenceValue.load();
}
void FenceGLImpl::Wait(Uint64 Value, bool FlushCommands)
{
while (!m_PendingFences.empty())
{
auto& val_fence = m_PendingFences.front();
if (val_fence.first > Value)
break;
auto res = glClientWaitSync(val_fence.second, FlushCommands ? GL_SYNC_FLUSH_COMMANDS_BIT : 0, std::numeric_limits<GLuint64>::max());
VERIFY_EXPR(res == GL_ALREADY_SIGNALED || res == GL_CONDITION_SATISFIED);
(void)res;
UpdateLastCompletedFenceValue(val_fence.first);
m_PendingFences.pop_front();
}
}
void FenceGLImpl::Reset(Uint64 NewValue)
{
DEV_CHECK_ERR(NewValue >= m_LastCompletedFenceValue, "Resetting fence '", m_Desc.Name, "' to the value (", NewValue, ") that is smaller than the last completed value (", m_LastCompletedFenceValue, ")");
UpdateLastCompletedFenceValue(NewValue);
}
} // namespace Diligent
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