mojo/public/cpp/bindings/buffer.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   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 MOJO_PUBLIC_CPP_BINDINGS_BUFFER_H_
   6 #define MOJO_PUBLIC_CPP_BINDINGS_BUFFER_H_
   7
   8 #include <stddef.h>
   9
  10 namespace mojo {
  11
  12 // Buffer provides a way to allocate memory. Allocations are 8-byte aligned and
  13 // zero-initialized. Allocations remain valid for the lifetime of the Buffer.
  14 class Buffer {
  15  public:
  16   typedef void (*Destructor)(void* address);
  17
  18   Buffer();
  19   virtual ~Buffer();
  20
  21   // A destructor may optionally be assigned to the allocation. Destructors run
  22   // (in LIFO order) when the Buffer instance is destroyed.
  23   virtual void* Allocate(size_t num_bytes, Destructor func = NULL) = 0;
  24
  25   // Returns the current Buffer from thread local storage. May be NULL.
  26   static Buffer* current();
  27
  28  private:
  29   Buffer* previous_;
  30 };
  31
  32 }  // namespace mojo
  33
  34 #endif  // MOJO_PUBLIC_CPP_BINDINGS_BUFFER_H_