2 // Open Service Platform
3 // Copyright (c) 2013 Samsung Electronics Co., Ltd.
5 // Licensed under the Apache License, Version 2.0 (the License);
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
9 // http://www.apache.org/licenses/LICENSE-2.0
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
19 * @brief This is the header file for the %FileLock class.
21 * This header file contains the declarations of the %FileLock class.
24 #ifndef _FIO_FILE_LOCK_H_
25 #define _FIO_FILE_LOCK_H_
27 namespace Tizen { namespace Io
33 * Defines the file lock types.
39 FILE_LOCK_SHARED, /**< More than one process can hold a shared file lock on a file region @n
40 A shared lock prevents any other process from setting an exclusive lock on the file
42 FILE_LOCK_EXCLUSIVE /**< Only one process can hold an exclusive lock on a file region @n
43 An exclusive lock prevents any other process from setting both shared and exclusive
44 lock on the file region. */
49 * @brief This class provides methods to check %FileLock type and release it.
53 * @final This class is not intended for extension.
55 * The %FileLock class provides methods to check %FileLock type and release it.
57 * @see Tizen::Io::File
58 * @see Tizen::Io::Registry
60 class _OSP_EXPORT_ FileLock
61 : public Tizen::Base::Object
66 * This destructor releases the file lock on the current opened file if acquired.
70 virtual ~FileLock(void);
73 * Checks whether the file lock is shared.
77 * @return @c true if the file lock is shared, @n
80 bool IsShared(void) const;
83 * Checks whether the file lock is exclusive.
87 * @return @c true if the file lock is exclusive, @n
90 bool IsExclusive(void) const;
93 * Checks whether the file lock is valid. @n
94 * The lock is valid unless the associated file has been closed.
98 * @return @c true if the file lock is valid, @n
101 bool IsValid(void) const;
105 // This default constructor is intentionally declared as private so that only the platform can create an instance.
112 // The implementation of this copy constructor is intentionally blank and declared as private to prohibit copying of objects.
116 FileLock(const FileLock& rhs);
119 // The implementation of this copy assignment operator is intentionally blank and declared as private to prohibit copying of objects.
123 FileLock& operator =(const FileLock& rhs);
125 class _FileLockImpl* __pFileLockImpl;
127 friend class _FileLockImpl;
133 #endif // _FIO_FILE_LOCK_H_