components/nacl/renderer/plugin/srpc_params.h

   1 // Copyright (c) 2012 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 // Parameter types for SRPC Invocation.
   6
   7 #ifndef COMPONENTS_NACL_RENDERER_PLUGIN_SRPC_PARAMS_H
   8 #define COMPONENTS_NACL_RENDERER_PLUGIN_SRPC_PARAMS_H
   9
  10 #include "native_client/src/include/nacl_macros.h"
  11 #include "native_client/src/include/portability_string.h"
  12 #include "native_client/src/shared/srpc/nacl_srpc.h"
  13
  14 namespace plugin {
  15
  16 // A utility class that builds and deletes parameter vectors used in rpcs.
  17 class SrpcParams {
  18  public:
  19   SrpcParams() {
  20     memset(ins_, 0, sizeof(ins_));
  21     memset(outs_, 0, sizeof(outs_));
  22   }
  23
  24   ~SrpcParams() {
  25     FreeAll();
  26   }
  27
  28   bool Init(const char* in_types, const char* out_types);
  29
  30   NaClSrpcArg** ins() const { return const_cast<NaClSrpcArg**>(ins_); }
  31   NaClSrpcArg** outs() const { return const_cast<NaClSrpcArg**>(outs_); }
  32
  33  private:
  34   NACL_DISALLOW_COPY_AND_ASSIGN(SrpcParams);
  35   void FreeAll();
  36   // The ins_ and outs_ arrays contain one more element, to hold a NULL pointer
  37   // to indicate the end of the list.
  38   NaClSrpcArg* ins_[NACL_SRPC_MAX_ARGS + 1];
  39   NaClSrpcArg* outs_[NACL_SRPC_MAX_ARGS + 1];
  40 };
  41
  42 }  // namespace plugin
  43
  44 #endif  // COMPONENTS_NACL_RENDERER_PLUGIN_SRPC_PARAMS_H