PPAPI: Implement PPB_FileMapping on POSIX

ppapi/thunk/ppb_file_io_dev_thunk.cc

+// Copyright (c) 2013 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.
+
+// From dev/ppb_file_io_dev.idl modified Thu Oct 17 12:25:57 2013.
+
+#include "ppapi/c/dev/ppb_file_io_dev.h"
+#include "ppapi/c/pp_completion_callback.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/shared_impl/tracked_callback.h"
+#include "ppapi/thunk/enter.h"
+#include "ppapi/thunk/ppb_file_io_api.h"
+#include "ppapi/thunk/ppb_instance_api.h"
+#include "ppapi/thunk/resource_creation_api.h"
+#include "ppapi/thunk/thunk.h"
+
+namespace ppapi {
+namespace thunk {
+
+namespace {
+
+int32_t Map(PP_Resource file_io,
+            int64_t length,
+            uint32_t map_protection,
+            uint32_t map_flags,
+            int64_t offset,
+            void** address,
+            struct PP_CompletionCallback callback) {
+  VLOG(4) << "PPB_FileIO_Dev::Map()";
+  EnterResource<PPB_FileIO_API> enter(file_io, callback, true);
+  if (enter.failed())
+    return enter.retval();
+  return enter.SetResult(enter.object()->Map(length,
+                                             map_protection,
+                                             map_flags,
+                                             offset,
+                                             address,
+                                             enter.callback()));
+}
+
+void Unmap(PP_Resource file_io, void* address, int64_t length) {
+  VLOG(4) << "PPB_FileIO_Dev::Unmap()";
+  EnterResource<PPB_FileIO_API> enter(file_io, true);
+  if (enter.failed())
+    return;
+  enter.object()->Unmap(address, length);
+}
+
+int64_t GetMapPageSize(PP_Resource file_io) {
+  VLOG(4) << "PPB_FileIO_Dev::GetMapPageSize()";
+  EnterResource<PPB_FileIO_API> enter(file_io, true);
+  if (enter.failed())
+    return 0;
+  return enter.object()->GetMapPageSize();
+}
+
+const PPB_FileIO_Dev_0_1 g_ppb_fileio_dev_thunk_0_1 = {
+  &Map,
+  &Unmap,
+  &GetMapPageSize
+};
+
+}  // namespace
+
+const PPB_FileIO_Dev_0_1* GetPPB_FileIO_Dev_0_1_Thunk() {
+  return &g_ppb_fileio_dev_thunk_0_1;
+}
+
+}  // namespace thunk
+}  // namespace ppapi