1 // Copyright 2014 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_PROXY_FILE_MAPPING_RESOURCE_H_ 6 #define PPAPI_PROXY_FILE_MAPPING_RESOURCE_H_ 7 8 #include "ppapi/proxy/file_io_resource.h" 9 #include "ppapi/proxy/plugin_resource.h" 10 #include "ppapi/proxy/ppapi_proxy_export.h" 11 #include "ppapi/thunk/ppb_file_mapping_api.h" 12 13 namespace ppapi { 14 namespace proxy { 15 16 // The proxy-side resource for PPB_FileMapping. 17 class PPAPI_PROXY_EXPORT FileMappingResource 18 : public PluginResource, 19 public thunk::PPB_FileMapping_API { 20 public: 21 FileMappingResource(Connection connection, PP_Instance instance); 22 23 private: 24 virtual ~FileMappingResource(); 25 26 // Resource implementation. 27 virtual thunk::PPB_FileMapping_API* AsPPB_FileMapping_API() OVERRIDE; 28 29 // PPB_FileMapping_API implementation. 30 virtual int32_t Map(PP_Instance instance, 31 PP_Resource file_io, 32 int64_t length, 33 uint32_t protection, 34 uint32_t flags, 35 int64_t offset, 36 void** address, 37 scoped_refptr<TrackedCallback> callback) OVERRIDE; 38 virtual int32_t Unmap(PP_Instance instance, 39 const void* address, 40 int64_t length, 41 scoped_refptr<TrackedCallback> callback) OVERRIDE; 42 virtual int64_t GetMapPageSize(PP_Instance instance) OVERRIDE; 43 44 struct MapResult { MapResultMapResult45 MapResult() : result(PP_ERROR_FAILED), address(NULL) { 46 } 47 int32_t result; 48 void* address; 49 }; 50 void OnMapCompleted(void** mapped_address_out_param, 51 int64_t length, 52 scoped_refptr<TrackedCallback> callback, 53 const MapResult& map_result); 54 55 // These functions perform potentially blocking operations so they should not 56 // be called on the main thread or while we hold the proxy lock. Their 57 // implementation is platform specific. See file_mapping_resource_posix.cc and 58 // file_mapping_resource_win.cc. 59 static MapResult DoMapBlocking( 60 scoped_refptr<FileIOResource::FileHolder> file_holder, 61 void* address_hint, 62 int64_t length, 63 uint32_t protection, 64 uint32_t flags, 65 int64_t offset); 66 static int32_t DoUnmapBlocking(const void* address, int64_t length); 67 // DoGetMapPageSize is platform-specific, but fast enough that we can call it 68 // on the main thread with the lock. 69 static int64_t DoGetMapPageSize(); 70 71 DISALLOW_COPY_AND_ASSIGN(FileMappingResource); 72 }; 73 74 } // namespace proxy 75 } // namespace ppapi 76 77 #endif // PPAPI_PROXY_FILE_MAPPING_RESOURCE_H_ 78