1 // Copyright (c) 2012 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 #include "ppapi/shared_impl/file_io_state_manager.h" 6 7 #include "base/logging.h" 8 #include "ppapi/c/pp_errors.h" 9 10 namespace ppapi { 11 12 FileIOStateManager::FileIOStateManager() 13 : num_pending_ops_(0), pending_op_(OPERATION_NONE), file_open_(false) {} 14 15 FileIOStateManager::~FileIOStateManager() {} 16 17 void FileIOStateManager::SetOpenSucceed() { file_open_ = true; } 18 19 int32_t FileIOStateManager::CheckOperationState(OperationType new_op, 20 bool should_be_open) { 21 if (should_be_open) { 22 if (!file_open_) 23 return PP_ERROR_FAILED; 24 } else { 25 if (file_open_) 26 return PP_ERROR_FAILED; 27 } 28 29 if (pending_op_ != OPERATION_NONE && 30 (pending_op_ != new_op || pending_op_ == OPERATION_EXCLUSIVE)) 31 return PP_ERROR_INPROGRESS; 32 33 return PP_OK; 34 } 35 36 void FileIOStateManager::SetPendingOperation(OperationType new_op) { 37 DCHECK(pending_op_ == OPERATION_NONE || 38 (pending_op_ != OPERATION_EXCLUSIVE && pending_op_ == new_op)); 39 pending_op_ = new_op; 40 num_pending_ops_++; 41 } 42 43 void FileIOStateManager::SetOperationFinished() { 44 DCHECK_GT(num_pending_ops_, 0); 45 if (--num_pending_ops_ == 0) 46 pending_op_ = OPERATION_NONE; 47 } 48 49 } // namespace ppapi 50
