components/nacl/renderer/plugin/srpc_client.h

   1 /*
   2  * Copyright (c) 2012 The Chromium Authors. All rights reserved.
   3  * Use of this source code is governed by a BSD-style license that can be
   4  * found in the LICENSE file.
   5  */
   6
   7 // A representation of an SRPC connection.  These can be either to the
   8 // service runtime or to untrusted NaCl threads.
   9
  10 #ifndef COMPONENTS_NACL_RENDERER_PLUGIN_SRPC_CLIENT_H_
  11 #define COMPONENTS_NACL_RENDERER_PLUGIN_SRPC_CLIENT_H_
  12
  13 #include <map>
  14 #include <string>
  15
  16 #include "components/nacl/renderer/plugin/utility.h"
  17 #include "native_client/src/include/nacl_macros.h"
  18 #include "native_client/src/shared/srpc/nacl_srpc.h"
  19
  20 namespace nacl {
  21 class DescWrapper;
  22 }  // namespace nacl
  23
  24 namespace plugin {
  25
  26 class MethodInfo;
  27 class SrpcParams;
  28
  29 //  SrpcClient represents an SRPC connection to a client.
  30 class SrpcClient {
  31  public:
  32   // Factory method for creating SrpcClients.
  33   static SrpcClient* New(nacl::DescWrapper* wrapper);
  34
  35   //  Init is passed a DescWrapper.  The SrpcClient performs service
  36   //  discovery and provides the interface for future rpcs.
  37   bool Init(nacl::DescWrapper* socket);
  38
  39   //  The destructor closes the connection to sel_ldr.
  40   ~SrpcClient();
  41
  42   //  Test whether the SRPC service has a given method.
  43   bool HasMethod(const std::string& method_name);
  44   //  Invoke an SRPC method.
  45   bool Invoke(const std::string& method_name, SrpcParams* params);
  46   // Get the error status from that last method invocation
  47   NaClSrpcError GetLastError() const { return last_error_; }
  48   bool InitParams(const std::string& method_name, SrpcParams* params);
  49
  50  private:
  51   NACL_DISALLOW_COPY_AND_ASSIGN(SrpcClient);
  52   SrpcClient();
  53   void GetMethods();
  54   typedef std::map<std::string, MethodInfo*> Methods;
  55   Methods methods_;
  56   NaClSrpcChannel srpc_channel_;
  57   bool srpc_channel_initialised_;
  58   NaClSrpcError last_error_;
  59 };
  60
  61 }  // namespace plugin
  62
  63 #endif  // COMPONENTS_NACL_RENDERER_PLUGIN_SRPC_CLIENT_H_