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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SKIA_EXT_SKIA_HISTOGRAM_H_
#define SKIA_EXT_SKIA_HISTOGRAM_H_
#include <stdint.h>
#include <atomic>
#include <memory>
// This file exposes Chrome's histogram functionality to Skia, without bringing
// in any Chrome specific headers. To achieve the same level of optimization as
// is present in Chrome, we need to use an inlined atomic pointer. This macro
// defines a placeholder atomic which will be inlined into the call-site. This
// placeholder is passed to the actual histogram logic in Chrome.
#define SK_HISTOGRAM_POINTER_HELPER(function, ...) \
do { \
static std::atomic_uintptr_t atomic_histogram_pointer; \
function(std::addressof(atomic_histogram_pointer), __VA_ARGS__); \
} while (0)
#define SK_HISTOGRAM_BOOLEAN(name, sample) \
SK_HISTOGRAM_POINTER_HELPER(skia::HistogramBoolean, "Skia." name, sample)
#define SK_HISTOGRAM_EXACT_LINEAR(name, sample, value_max) \
SK_HISTOGRAM_POINTER_HELPER(skia::HistogramExactLinear, "Skia." name, \
sample, value_max)
#define SK_HISTOGRAM_MEMORY_KB(name, sample) \
SK_HISTOGRAM_POINTER_HELPER(skia::HistogramMemoryKB, "Skia." name, sample)
namespace skia {
void HistogramBoolean(std::atomic_uintptr_t* atomic_histogram_pointer,
const char* name,
bool sample);
void HistogramExactLinear(std::atomic_uintptr_t* atomic_histogram_pointer,
const char* name,
int sample,
int value_max);
void HistogramMemoryKB(std::atomic_uintptr_t* atomic_histogram_pointer,
const char* name,
int sample);
} // namespace skia
#endif // SKIA_EXT_SKIA_HISTOGRAM_H_
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