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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SQL_SQL_MEMORY_DUMP_PROVIDER_H_
#define SQL_SQL_MEMORY_DUMP_PROVIDER_H_
#include <cstdint>
#include "base/component_export.h"
#include "base/memory/singleton.h"
#include "base/trace_event/memory_dump_provider.h"
namespace base::trace_event {
struct MemoryDumpArgs;
}
namespace sql {
// Adds process-wide memory usage statistics about sqlite to chrome://tracing.
// sql::Database::OnMemoryDump adds per-connection memory statistics.
class COMPONENT_EXPORT(SQL) SqlMemoryDumpProvider
: public base::trace_event::MemoryDumpProvider {
public:
static SqlMemoryDumpProvider* GetInstance();
// Gets the memory used by SQLite, in bytes, and returns via return value. The
// high water usage (highest recorded usage) is returned via out-param if
// non-null. If `high_water` is non-null, the high water mark will also be
// reset afterwards.
static int64_t GetMemoryUse(int64_t* high_water = nullptr);
SqlMemoryDumpProvider(const SqlMemoryDumpProvider&) = delete;
SqlMemoryDumpProvider& operator=(const SqlMemoryDumpProvider&) = delete;
// MemoryDumpProvider implementation.
bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
base::trace_event::ProcessMemoryDump* pmd) override;
private:
friend struct base::DefaultSingletonTraits<SqlMemoryDumpProvider>;
SqlMemoryDumpProvider();
~SqlMemoryDumpProvider() override;
};
} // namespace sql
#endif // SQL_SQL_MEMORY_DUMP_PROVIDER_H_
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