xpcom/base/nsMemoryImpl.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef nsMemoryImpl_h__
   7 #define nsMemoryImpl_h__
   8
   9 #include "mozilla/Atomics.h"
  10
  11 #include "nsIMemory.h"
  12 #include "nsIRunnable.h"
  13
  14 // nsMemoryImpl is a static object. We can do this because it doesn't have
  15 // a constructor/destructor or any instance members. Please don't add
  16 // instance member variables, only static member variables.
  17
  18 class nsMemoryImpl : public nsIMemory
  19 {
  20 public:
  21     // We don't use the generic macros because we are a special static object
  22     NS_IMETHOD QueryInterface(REFNSIID aIID, void** aResult);
  23     NS_IMETHOD_(nsrefcnt) AddRef(void) { return 1; }
  24     NS_IMETHOD_(nsrefcnt) Release(void) { return 1; }
  25
  26     NS_DECL_NSIMEMORY
  27
  28     static nsresult Create(nsISupports* outer,
  29                            const nsIID& aIID, void **aResult);
  30
  31     NS_HIDDEN_(nsresult) FlushMemory(const char16_t* aReason, bool aImmediate);
  32     NS_HIDDEN_(nsresult) RunFlushers(const char16_t* aReason);
  33
  34 protected:
  35     struct FlushEvent : public nsIRunnable {
  36         NS_DECL_ISUPPORTS_INHERITED
  37         NS_DECL_NSIRUNNABLE
  38         const char16_t* mReason;
  39     };
  40
  41     static mozilla::Atomic<int32_t> sIsFlushing;
  42     static FlushEvent sFlushEvent;
  43     static PRIntervalTime sLastFlushTime;
  44 };
  45
  46 #endif // nsMemoryImpl_h__