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/*
* Copyright (C) 2017 Metrological Group B.V.
* Copyright (C) 2017 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "NicosiaBuffer.h"
#include <wtf/FastMalloc.h>
namespace Nicosia {
Lock Buffer::s_layersMemoryUsageLock;
double Buffer::s_currentLayersMemoryUsage = 0.0;
double Buffer::s_maxLayersMemoryUsage = 0.0;
void Buffer::resetMemoryUsage()
{
Locker locker { s_layersMemoryUsageLock };
s_maxLayersMemoryUsage = s_currentLayersMemoryUsage;
}
double Buffer::getMemoryUsage()
{
// The memory usage is max of memory usage since last resetMemoryUsage or getMemoryUsage.
Locker locker { s_layersMemoryUsageLock };
const auto memoryUsage = s_maxLayersMemoryUsage;
s_maxLayersMemoryUsage = s_currentLayersMemoryUsage;
return memoryUsage;
}
Ref<Buffer> Buffer::create(const WebCore::IntSize& size, Flags flags)
{
return adoptRef(*new Buffer(size, flags));
}
Buffer::Buffer(const WebCore::IntSize& size, Flags flags)
: m_size(size)
, m_flags(flags)
{
const auto checkedArea = size.area() * 4;
m_data = MallocPtr<unsigned char>::tryZeroedMalloc(checkedArea);
{
Locker locker { s_layersMemoryUsageLock };
s_currentLayersMemoryUsage += checkedArea;
s_maxLayersMemoryUsage = std::max(s_maxLayersMemoryUsage, s_currentLayersMemoryUsage);
}
}
Buffer::~Buffer()
{
const auto checkedArea = m_size.area().value() * 4;
{
Locker locker { s_layersMemoryUsageLock };
s_currentLayersMemoryUsage -= checkedArea;
}
}
void Buffer::beginPainting()
{
Locker locker { m_painting.lock };
ASSERT(m_painting.state == PaintingState::Complete);
m_painting.state = PaintingState::InProgress;
}
void Buffer::completePainting()
{
Locker locker { m_painting.lock };
ASSERT(m_painting.state == PaintingState::InProgress);
m_painting.state = PaintingState::Complete;
m_painting.condition.notifyOne();
}
void Buffer::waitUntilPaintingComplete()
{
Locker locker { m_painting.lock };
m_painting.condition.wait(m_painting.lock,
[this] { return m_painting.state == PaintingState::Complete; });
}
} // namespace Nicosia
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