PPAPI: Force async callback invocation option.

ppapi/cpp/file_io.cc

 // 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/file_io.h"
 
 #include "ppapi/c/ppb_file_io.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/trusted/ppb_file_io_trusted.h"
 #include "ppapi/cpp/completion_callback.h"
@@ skipping 23 matching lines @@
 }
 
 FileIO::FileIO(const FileIO& other)
     : Resource(other) {
 }
 
 int32_t FileIO::Open(const FileRef& file_ref,
                      int32_t open_flags,
                      const CompletionCallback& cc) {
   if (!has_interface<PPB_FileIO>())
-    return PP_ERROR_NOINTERFACE;
+    return cc.MayForce(PP_ERROR_NOINTERFACE);
   return get_interface<PPB_FileIO>()->Open(
       pp_resource(), file_ref.pp_resource(), open_flags,
       cc.pp_completion_callback());
 }
 
 int32_t FileIO::Query(PP_FileInfo* result_buf,
                       const CompletionCallback& cc) {
   if (!has_interface<PPB_FileIO>())
-    return PP_ERROR_NOINTERFACE;
+    return cc.MayForce(PP_ERROR_NOINTERFACE);
   return get_interface<PPB_FileIO>()->Query(
       pp_resource(), result_buf, cc.pp_completion_callback());
 }
 
 int32_t FileIO::Touch(PP_Time last_access_time,
                       PP_Time last_modified_time,
                       const CompletionCallback& cc) {
   if (!has_interface<PPB_FileIO>())
-    return PP_ERROR_NOINTERFACE;
+    return cc.MayForce(PP_ERROR_NOINTERFACE);
   return get_interface<PPB_FileIO>()->Touch(
       pp_resource(), last_access_time, last_modified_time,
       cc.pp_completion_callback());
 }
 
 int32_t FileIO::Read(int64_t offset,
                      char* buffer,
                      int32_t bytes_to_read,
                      const CompletionCallback& cc) {
   if (!has_interface<PPB_FileIO>())
-    return PP_ERROR_NOINTERFACE;
+    return cc.MayForce(PP_ERROR_NOINTERFACE);
   return get_interface<PPB_FileIO>()->Read(pp_resource(),
       offset, buffer, bytes_to_read, cc.pp_completion_callback());
 }
 
 int32_t FileIO::Write(int64_t offset,
                       const char* buffer,
                       int32_t bytes_to_write,
                       const CompletionCallback& cc) {
   if (!has_interface<PPB_FileIO>())
-    return PP_ERROR_NOINTERFACE;
+    return cc.MayForce(PP_ERROR_NOINTERFACE);
   return get_interface<PPB_FileIO>()->Write(
       pp_resource(), offset, buffer, bytes_to_write,
       cc.pp_completion_callback());
 }
 
 int32_t FileIO::SetLength(int64_t length,
                           const CompletionCallback& cc) {
   if (!has_interface<PPB_FileIO>())
-    return PP_ERROR_NOINTERFACE;
+    return cc.MayForce(PP_ERROR_NOINTERFACE);
   return get_interface<PPB_FileIO>()->SetLength(
       pp_resource(), length, cc.pp_completion_callback());
 }
 
 int32_t FileIO::Flush(const CompletionCallback& cc) {
   if (!has_interface<PPB_FileIO>())
-    return PP_ERROR_NOINTERFACE;
+    return cc.MayForce(PP_ERROR_NOINTERFACE);
   return get_interface<PPB_FileIO>()->Flush(
       pp_resource(), cc.pp_completion_callback());
 }
 
 void FileIO::Close() {
   if (!has_interface<PPB_FileIO>())
     return;
   get_interface<PPB_FileIO>()->Close(pp_resource());
 }
 
 }  // namespace pp