sql/sql_memory_dump_provider.h

   1 // Copyright 2015 The Chromium Authors
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef SQL_SQL_MEMORY_DUMP_PROVIDER_H_
   6 #define SQL_SQL_MEMORY_DUMP_PROVIDER_H_
   7
   8 #include "base/component_export.h"
   9 #include "base/memory/singleton.h"
  10 #include "base/trace_event/memory_dump_provider.h"
  11
  12 namespace sql {
  13
  14 // Adds process-wide memory usage statistics about sqlite to chrome://tracing.
  15 // sql::Database::OnMemoryDump adds per-connection memory statistics.
  16 class COMPONENT_EXPORT(SQL) SqlMemoryDumpProvider
  17     : public base::trace_event::MemoryDumpProvider {
  18  public:
  19   static SqlMemoryDumpProvider* GetInstance();
  20
  21   SqlMemoryDumpProvider(const SqlMemoryDumpProvider&) = delete;
  22   SqlMemoryDumpProvider& operator=(const SqlMemoryDumpProvider&) = delete;
  23
  24   // MemoryDumpProvider implementation.
  25   bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
  26                     base::trace_event::ProcessMemoryDump* pmd) override;
  27
  28  private:
  29   friend struct base::DefaultSingletonTraits<SqlMemoryDumpProvider>;
  30
  31   SqlMemoryDumpProvider();
  32   ~SqlMemoryDumpProvider() override;
  33 };
  34
  35 }  // namespace sql
  36
  37 #endif  // SQL_SQL_MEMORY_DUMP_PROVIDER_H_