native_client_sdk/src/libraries/nacl_io/memfs/mem_fs_node.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 LIBRARIES_NACL_IO_MEMFS_MEM_FS_NODE_H_
   6 #define LIBRARIES_NACL_IO_MEMFS_MEM_FS_NODE_H_
   7
   8 #include "nacl_io/node.h"
   9
  10 namespace nacl_io {
  11
  12 class MemFsNode : public Node {
  13  public:
  14   explicit MemFsNode(Filesystem* filesystem);
  15
  16  protected:
  17   virtual ~MemFsNode();
  18
  19  public:
  20   // Normal read/write operations on a file
  21   virtual Error Read(const HandleAttr& attr,
  22                      void* buf,
  23                      size_t count,
  24                      int* out_bytes);
  25   virtual Error Write(const HandleAttr& attr,
  26                       const void* buf,
  27                       size_t count,
  28                       int* out_bytes);
  29   virtual Error FTruncate(off_t size);
  30
  31  private:
  32   Error Resize(off_t size);
  33
  34   char* data_;
  35   size_t data_capacity_;
  36   friend class MemFs;
  37 };
  38
  39 }  // namespace nacl_io
  40
  41 #endif  // LIBRARIES_NACL_IO_MEMFS_MEM_FS_NODE_H_