[WIP] Provided file system from NACL.

ppapi/thunk/ppb_filesystem_provider_thunk.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+#include "ppapi/c/dev/ppb_filesystemprovider_dev.h"
+#include "ppapi/thunk/enter.h"
+#include "ppapi/thunk/ppb_filesystem_provider_api.h"
+#include "ppapi/thunk/ppb_instance_api.h"
+#include "ppapi/thunk/thunk.h"
+
+namespace ppapi {
+namespace thunk {
+
+namespace {
+
+/*
+ *  The implementation of the interfaces
+ */
+
+PP_Resource Create(PP_Instance instance) {
+  EnterResourceCreation enter( instance );
+  if ( enter.failed() )
+    return 0;
+  return enter.functions()->CreateFilesystemProvider(instance);
+}
+
+PP_Bool IsFilesystemProvider(PP_Resource resource) {
+  EnterResource< PPB_FilesystemProvider_API > enter( resource, true );
+  return PP_FromBool( enter.succeeded() );
+}
+
+int32_t Mount(
+    PP_Resource filesystem_prov,
+    struct PP_Var filesystem_id,
+    struct PP_Var display_name,
+    PP_Bool writable,
+    int32_t opened_files_limit,
+    PP_ProviderError_Dev* error,
+    struct PP_CompletionCallback callback) {
+
+  EnterResource< PPB_FilesystemProvider_API > enter(
+                                                  filesystem_prov,
+                                                  callback,
+                                                  true );
+  if (enter.failed())
+    return enter.retval();
+  return enter.SetResult (enter.object()->Mount(
+                                              filesystem_id, display_name,
+                                              writable, opened_files_limit,
+                                              error, enter.callback() ) );
+}
+
+int32_t  Unmount(
+    PP_Resource filesystem_prov,
+    struct PP_Var filesystemId,
+    PP_ProviderError_Dev* error,
+    struct PP_CompletionCallback callback) {
+  EnterResource< PPB_FilesystemProvider_API > enter(
+                                                  filesystem_prov,
+                                                  callback,
+                                                  true );
+  if (enter.failed())
+    return enter.retval();
+
+  return enter.SetResult( enter.object()->Unmount(
+                                              filesystemId,
+                                              error,
+                                              enter.callback() ) );
+}
+
+int32_t SendMetadataSuccessResponse(
+    PP_Resource filesystem_prov,
+    const struct PP_EntryMetadata_Dev* metadata,
+    int32_t request_id ) {
+  EnterResource< PPB_FilesystemProvider_API > enter( filesystem_prov, true);
+  if (enter.failed())
+    return enter.retval();
+
+  return enter.object()->SendMetadataSuccessResponse(
+                             metadata, request_id );
+}
+
+int32_t SendReadDirectorySuccessResponse(
+    PP_Resource filesystem_prov,
+    uint32_t array_size,
+    const struct PP_EntryMetadata_Dev entries[],
+    PP_Bool has_more,
+    int32_t request_id) {
+  EnterResource< PPB_FilesystemProvider_API > enter(filesystem_prov, true);
+  if (enter.failed())
+    return enter.retval();
+
+  return  enter.object()->SendReadDirectorySuccessResponse(
+                              array_size, entries, has_more, request_id ) ;
+
+}
+
+int32_t SendReadFileSuccessResponse(
+    PP_Resource filesystem_prov,
+    uint32_t data_size,
+    const void* data,
+    PP_Bool has_more,
+    int32_t request_id) {
+  EnterResource< PPB_FilesystemProvider_API > enter( filesystem_prov, true);
+  if (enter.failed())
+    return enter.retval();
+
+  return  enter.object()->SendReadFileSuccessResponse(
+                              data_size, data, has_more, request_id ) ;
+}
+
+int32_t SendSuccessResponse(
+    PP_Resource filesystem_prov,
+    PP_OperationType_Dev operation_type,
+    int32_t request_id ) {
+  EnterResource< PPB_FilesystemProvider_API > enter( filesystem_prov, true );
+  if( enter.failed() )
+    return enter.retval();
+  return enter.object()->SendSuccessResponse( operation_type, request_id );
+}
+
+int32_t SendErrorResponse(
+    PP_Resource filesystem_prov,
+    PP_OperationType_Dev operation_type,
+    PP_ProviderError_Dev error,
+    int32_t request_id ) {
+  EnterResource< PPB_FilesystemProvider_API > enter( filesystem_prov, true );
+  if( enter.failed() )
+    return enter.retval();
+
+  return enter.object()->SendErrorResponse(
+                             operation_type, error, request_id ) ;
+}
+
+
+int32_t  GetNextRequest(
+    PP_Resource filesystem_prov,
+    PP_FilesystemRequest* request,
+    struct PP_CompletionCallback callback) {
+  EnterResource< PPB_FilesystemProvider_API > enter(
+                                                  filesystem_prov,
+                                                  callback,
+                                                  true );
+  if (enter.failed())
+    return enter.retval();
+
+  return enter.SetResult( enter.object()->GetNextRequest(
+                                              request,
+                                              enter.callback() ) );
+}
+
+int32_t FreeWriteRequestBuffer(PP_Resource filesystem_prov,
+                               const void* buffer) {
+  EnterResource<PPB_FilesystemProvider_API> enter( filesystem_prov, true );
+  if(enter.failed())
+    return enter.retval();
+  return enter.object()->FreeWriteRequestBuffer(buffer);
+}
+
+const PPB_FilesystemProvider_Dev_0_1 g_ppb_fs_provider_dev_thunk_0_1 = {
+  &Create,
+  &IsFilesystemProvider,
+  &Mount,
+  &Unmount,
+  &SendSuccessResponse,
+  &SendErrorResponse,
+  &SendMetadataSuccessResponse,
+  &SendReadDirectorySuccessResponse,
+  &SendReadFileSuccessResponse,
+  &GetNextRequest,
+  &FreeWriteRequestBuffer
+};
+
+} // namespace
+
+PPAPI_THUNK_EXPORT const PPB_FilesystemProvider_Dev_0_1*
+GetPPB_FilesystemProvider_Dev_0_1_Thunk() {
+  return &g_ppb_fs_provider_dev_thunk_0_1;
+}
+
+} // thunk namespace
+} // ppapi namespace