PPAPI: Force async callback invocation option.

ppapi/cpp/dev/file_io_dev.cc

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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/cpp/dev/file_io_dev.h"
 
 #include "ppapi/c/dev/ppb_file_io_dev.h"
 #include "ppapi/c/dev/ppb_file_io_trusted_dev.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/cpp/dev/file_ref_dev.h"
@@ skipping 22 matching lines @@
 }
 
 FileIO_Dev::FileIO_Dev(const FileIO_Dev& other)
     : Resource(other) {
 }
 
 int32_t FileIO_Dev::Open(const FileRef_Dev& file_ref,
                          int32_t open_flags,
                          const CompletionCallback& cc) {
   if (!has_interface<PPB_FileIO_Dev>())
-    return PP_ERROR_NOINTERFACE;
+    return cc.MayForce(static_cast<int32_t>(PP_ERROR_NOINTERFACE));

[piman, 2011/06/07 17:32:14]

no need for static_cast ? Here an below.

[polina, 2011/06/09 23:53:51]

Done.

   return get_interface<PPB_FileIO_Dev>()->Open(
       pp_resource(), file_ref.pp_resource(), open_flags,
       cc.pp_completion_callback());
 }
 
 int32_t FileIO_Dev::Query(PP_FileInfo_Dev* result_buf,
                           const CompletionCallback& cc) {
   if (!has_interface<PPB_FileIO_Dev>())
-    return PP_ERROR_NOINTERFACE;
+    return cc.MayForce(static_cast<int32_t>(PP_ERROR_NOINTERFACE));
   return get_interface<PPB_FileIO_Dev>()->Query(
       pp_resource(), result_buf, cc.pp_completion_callback());
 }
 
 int32_t FileIO_Dev::Touch(PP_Time last_access_time,
                           PP_Time last_modified_time,
                           const CompletionCallback& cc) {
   if (!has_interface<PPB_FileIO_Dev>())
-    return PP_ERROR_NOINTERFACE;
+    return cc.MayForce(static_cast<int32_t>(PP_ERROR_NOINTERFACE));
   return get_interface<PPB_FileIO_Dev>()->Touch(
       pp_resource(), last_access_time, last_modified_time,
       cc.pp_completion_callback());
 }
 
 int32_t FileIO_Dev::Read(int64_t offset,
                          char* buffer,
                          int32_t bytes_to_read,
                          const CompletionCallback& cc) {
   if (!has_interface<PPB_FileIO_Dev>())
-    return PP_ERROR_NOINTERFACE;
+    return cc.MayForce(static_cast<int32_t>(PP_ERROR_NOINTERFACE));
   return get_interface<PPB_FileIO_Dev>()->Read(pp_resource(),
       offset, buffer, bytes_to_read, cc.pp_completion_callback());
 }
 
 int32_t FileIO_Dev::Write(int64_t offset,
                           const char* buffer,
                           int32_t bytes_to_write,
                           const CompletionCallback& cc) {
   if (!has_interface<PPB_FileIO_Dev>())
-    return PP_ERROR_NOINTERFACE;
+    return cc.MayForce(static_cast<int32_t>(PP_ERROR_NOINTERFACE));
   return get_interface<PPB_FileIO_Dev>()->Write(
       pp_resource(), offset, buffer, bytes_to_write,
       cc.pp_completion_callback());
 }
 
 int32_t FileIO_Dev::SetLength(int64_t length,
                           const CompletionCallback& cc) {
   if (!has_interface<PPB_FileIO_Dev>())
-    return PP_ERROR_NOINTERFACE;
+    return cc.MayForce(static_cast<int32_t>(PP_ERROR_NOINTERFACE));
   return get_interface<PPB_FileIO_Dev>()->SetLength(
       pp_resource(), length, cc.pp_completion_callback());
 }
 
 int32_t FileIO_Dev::Flush(const CompletionCallback& cc) {
   if (!has_interface<PPB_FileIO_Dev>())
-    return PP_ERROR_NOINTERFACE;
+    return cc.MayForce(static_cast<int32_t>(PP_ERROR_NOINTERFACE));
   return get_interface<PPB_FileIO_Dev>()->Flush(
       pp_resource(), cc.pp_completion_callback());
 }
 
 void FileIO_Dev::Close() {
   if (!has_interface<PPB_FileIO_Dev>())
     return;
   get_interface<PPB_FileIO_Dev>()->Close(pp_resource());
 }
 
 }  // namespace pp