source: XMLIO_V2/external/src/POCO/Foundation.save/Poco/Mutex_POSIX.h @ 80

Last change on this file since 80 was 80, checked in by ymipsl, 14 years ago

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1//
2// Mutex_POSIX.h
3//
4// $Id: //poco/1.3/Foundation/include/Poco/Mutex_POSIX.h#2 $
5//
6// Library: Foundation
7// Package: Threading
8// Module:  Mutex
9//
10// Definition of the MutexImpl and FastMutexImpl classes for POSIX Threads.
11//
12// Copyright (c) 2004-2008, Applied Informatics Software Engineering GmbH.
13// and Contributors.
14//
15// Permission is hereby granted, free of charge, to any person or organization
16// obtaining a copy of the software and accompanying documentation covered by
17// this license (the "Software") to use, reproduce, display, distribute,
18// execute, and transmit the Software, and to prepare derivative works of the
19// Software, and to permit third-parties to whom the Software is furnished to
20// do so, all subject to the following:
21//
22// The copyright notices in the Software and this entire statement, including
23// the above license grant, this restriction and the following disclaimer,
24// must be included in all copies of the Software, in whole or in part, and
25// all derivative works of the Software, unless such copies or derivative
26// works are solely in the form of machine-executable object code generated by
27// a source language processor.
28//
29// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
30// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
31// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
32// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
33// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
34// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
35// DEALINGS IN THE SOFTWARE.
36//
37
38
39#ifndef Foundation_Mutex_POSIX_INCLUDED
40#define Foundation_Mutex_POSIX_INCLUDED
41
42
43#include "Poco/Foundation.h"
44#include "Poco/Exception.h"
45#include <pthread.h>
46#include <errno.h>
47
48
49namespace Poco {
50
51
52class Foundation_API MutexImpl
53{
54protected:
55        MutexImpl();
56        MutexImpl(bool fast);
57        ~MutexImpl();
58        void lockImpl();
59        bool tryLockImpl();
60        bool tryLockImpl(long milliseconds);
61        void unlockImpl();
62       
63private:
64        pthread_mutex_t _mutex;
65};
66
67
68class Foundation_API FastMutexImpl: public MutexImpl
69{
70protected:
71        FastMutexImpl();
72        ~FastMutexImpl();
73};
74
75
76//
77// inlines
78//
79inline void MutexImpl::lockImpl()
80{
81        if (pthread_mutex_lock(&_mutex)) 
82                throw SystemException("cannot lock mutex");
83}
84
85
86inline bool MutexImpl::tryLockImpl()
87{
88        int rc = pthread_mutex_trylock(&_mutex);
89        if (rc == 0)
90                return true;
91        else if (rc == EBUSY)
92                return false;
93        else
94                throw SystemException("cannot lock mutex");
95
96}
97
98
99inline void MutexImpl::unlockImpl()
100{
101        if (pthread_mutex_unlock(&_mutex))
102                throw SystemException("cannot unlock mutex");
103}
104
105
106} // namespace Poco
107
108
109#endif // Foundation_Mutex_POSIX_INCLUDED
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