Revert 113479 - Revert "Revert 113250 - Add CommandBuffer::SetGetBuffer"

gpu/command_buffer/service/cmd_parser.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file contains the command parser class.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_CMD_PARSER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_CMD_PARSER_H_
 
 #include "gpu/command_buffer/common/constants.h"
 #include "gpu/command_buffer/common/cmd_buffer_common.h"
 
 namespace gpu {
 
 class AsyncAPIInterface;
 
 // Command parser class. This class parses commands from a shared memory
 // buffer, to implement some asynchronous RPC mechanism.
 class CommandParser {
  public:
-  explicit CommandParser(AsyncAPIInterface* handler);
-
-  // Sets the buffer to read commands from.
-  void SetBuffer(
-      void* shm_address,
-      size_t shm_size,
-      ptrdiff_t offset,
-      size_t size);
+  CommandParser(void *shm_address,
+                size_t shm_size,
+                ptrdiff_t offset,
+                size_t size,
+                CommandBufferOffset start_get,
+                AsyncAPIInterface *handler);
 
   // Gets the "get" pointer. The get pointer is an index into the command
   // buffer considered as an array of CommandBufferEntry.
   CommandBufferOffset get() const { return get_; }
 
   // Sets the "get" pointer. The get pointer is an index into the command buffer
   // considered as an array of CommandBufferEntry.
   bool set_get(CommandBufferOffset get) {
     if (get >= 0 && get < entry_count_) {
       get_ = get;
@@ skipping 19 matching lines @@
 
   // Processes all commands until get == put.
   error::Error ProcessAllCommands();
 
   // Reports an error.
   void ReportError(unsigned int command_id, error::Error result);
 
  private:
   CommandBufferOffset get_;
   CommandBufferOffset put_;
-  CommandBufferEntry* buffer_;
+  CommandBufferEntry *buffer_;
   int32 entry_count_;
-  AsyncAPIInterface* handler_;
+  AsyncAPIInterface *handler_;
 };
 
 // This class defines the interface for an asynchronous API handler, that
 // is responsible for de-multiplexing commands and their arguments.
 class AsyncAPIInterface {
  public:
   AsyncAPIInterface() {}
   virtual ~AsyncAPIInterface() {}
 
   // Executes a command.
   // Parameters:
   //    command: the command index.
   //    arg_count: the number of CommandBufferEntry arguments.
   //    cmd_data: the command data.
   // Returns:
   //   error::kNoError if no error was found, one of
   //   error::Error otherwise.
   virtual error::Error DoCommand(
       unsigned int command,
       unsigned int arg_count,
       const void* cmd_data) = 0;
 
   // Returns a name for a command. Useful for logging / debuging.
   virtual const char* GetCommandName(unsigned int command_id) const = 0;
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_CMD_PARSER_H_