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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_DEBUG_RENDERING_STATS_INSTRUMENTATION_H_
#define CC_DEBUG_RENDERING_STATS_INSTRUMENTATION_H_
#include <stdint.h>
#include <memory>
#include "base/synchronization/lock.h"
#include "cc/debug/rendering_stats.h"
namespace cc {
// RenderingStatsInstrumentation is shared among threads and manages conditional
// recording of rendering stats into a private RenderingStats instance.
class CC_DEBUG_EXPORT RenderingStatsInstrumentation {
public:
static std::unique_ptr<RenderingStatsInstrumentation> Create();
RenderingStatsInstrumentation(const RenderingStatsInstrumentation&) = delete;
virtual ~RenderingStatsInstrumentation();
RenderingStatsInstrumentation& operator=(
const RenderingStatsInstrumentation&) = delete;
// Return copy of current impl thread rendering stats, and resets the current
// stats.
RenderingStats TakeImplThreadRenderingStats();
// Read and write access to the record_rendering_stats_ flag is not locked to
// improve performance. The flag is commonly turned off and hardly changes
// it's value during runtime.
bool record_rendering_stats() const { return record_rendering_stats_; }
void set_record_rendering_stats(bool record_rendering_stats) {
if (record_rendering_stats_ != record_rendering_stats)
record_rendering_stats_ = record_rendering_stats;
}
void AddVisibleContentArea(int64_t area);
void AddApproximatedVisibleContentArea(int64_t area);
protected:
RenderingStatsInstrumentation();
private:
RenderingStats impl_thread_rendering_stats_;
bool record_rendering_stats_;
};
} // namespace cc
#endif // CC_DEBUG_RENDERING_STATS_INSTRUMENTATION_H_
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