ppapi/native_client/src/trusted/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 NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_SRPC_PARAMS_H
   8 #define NATIVE_CLIENT_SRC_TRUSTED_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(const char* in_types, const char* out_types) {
  25     if (!Init(in_types, out_types)) {
  26       FreeAll();
  27     }
  28   }
  29
  30   ~SrpcParams() {
  31     FreeAll();
  32   }
  33
  34   bool Init(const char* in_types, const char* out_types);
  35
  36   NaClSrpcArg** ins() const { return const_cast<NaClSrpcArg**>(ins_); }
  37   NaClSrpcArg** outs() const { return const_cast<NaClSrpcArg**>(outs_); }
  38
  39  private:
  40   NACL_DISALLOW_COPY_AND_ASSIGN(SrpcParams);
  41   void FreeAll();
  42   // The ins_ and outs_ arrays contain one more element, to hold a NULL pointer
  43   // to indicate the end of the list.
  44   NaClSrpcArg* ins_[NACL_SRPC_MAX_ARGS + 1];
  45   NaClSrpcArg* outs_[NACL_SRPC_MAX_ARGS + 1];
  46 };
  47
  48 }  // namespace plugin
  49
  50 #endif  // NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_SRPC_PARAMS_H