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      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
     51