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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 #include "ppapi/c/dev/ppb_buffer_dev.h"
      6 #include "ppapi/thunk/thunk.h"
      7 #include "ppapi/thunk/enter.h"
      8 #include "ppapi/thunk/ppb_buffer_api.h"
      9 #include "ppapi/thunk/resource_creation_api.h"
     10 
     11 namespace ppapi {
     12 namespace thunk {
     13 
     14 namespace {
     15 
     16 PP_Resource Create(PP_Instance instance, uint32_t size) {
     17   EnterResourceCreation enter(instance);
     18   if (enter.failed())
     19     return 0;
     20   return enter.functions()->CreateBuffer(instance, size);
     21 }
     22 
     23 PP_Bool IsBuffer(PP_Resource resource) {
     24   EnterResource<PPB_Buffer_API> enter(resource, false);
     25   return PP_FromBool(enter.succeeded());
     26 }
     27 
     28 PP_Bool Describe(PP_Resource resource, uint32_t* size_in_bytes) {
     29   EnterResource<PPB_Buffer_API> enter(resource, true);
     30   if (enter.failed()) {
     31     *size_in_bytes = 0;
     32     return PP_FALSE;
     33   }
     34   return enter.object()->Describe(size_in_bytes);
     35 }
     36 
     37 void* Map(PP_Resource resource) {
     38   EnterResource<PPB_Buffer_API> enter(resource, true);
     39   if (enter.failed())
     40     return NULL;
     41   return enter.object()->Map();
     42 }
     43 
     44 void Unmap(PP_Resource resource) {
     45   EnterResource<PPB_Buffer_API> enter(resource, true);
     46   if (enter.succeeded())
     47     enter.object()->Unmap();
     48 }
     49 
     50 const PPB_Buffer_Dev g_ppb_buffer_thunk = {
     51   &Create,
     52   &IsBuffer,
     53   &Describe,
     54   &Map,
     55   &Unmap,
     56 };
     57 
     58 }  // namespace
     59 
     60 const PPB_Buffer_Dev_0_4* GetPPB_Buffer_Dev_0_4_Thunk() {
     61   return &g_ppb_buffer_thunk;
     62 }
     63 
     64 }  // namespace thunk
     65 }  // namespace ppapi
     66