ppapi/cpp/module_impl.h

   1 // Copyright (c) 2011 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 #ifndef PPAPI_CPP_MODULE_IMPL_H_
   6 #define PPAPI_CPP_MODULE_IMPL_H_
   7
   8 /// @file
   9 /// This file defines some simple function templates that help the C++ wrappers
  10 /// (and are not for external developers to use).
  11
  12 #include "ppapi/cpp/module.h"
  13
  14 namespace pp {
  15
  16 namespace {
  17
  18 // Specialize this function to return the interface string corresponding to the
  19 // PP?_XXX structure.
  20 template <typename T> const char* interface_name() {
  21   return NULL;
  22 }
  23
  24 template <typename T> inline T const* get_interface() {
  25   static T const* funcs = reinterpret_cast<T const*>(
  26       pp::Module::Get()->GetBrowserInterface(interface_name<T>()));
  27   return funcs;
  28 }
  29
  30 template <typename T> inline bool has_interface() {
  31   return get_interface<T>() != NULL;
  32 }
  33
  34 }  // namespace
  35
  36 }  // namespace pp
  37
  38 #endif  // PPAPI_CPP_MODULE_IMPL_H_
  39