1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtCore module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or (at your option) the GNU General 28 ** Public license version 3 or any later version approved by the KDE Free 29 ** Qt Foundation. The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #ifndef QSYSTEMSEMAPHORE_P_H 41 #define QSYSTEMSEMAPHORE_P_H 42 43 // 44 // W A R N I N G 45 // ------------- 46 // 47 // This file is not part of the Qt API. It exists purely as an 48 // implementation detail. This header file may change from version to 49 // version without notice, or even be removed. 50 // 51 // We mean it. 52 // 53 54 #include "qsystemsemaphore.h" 55 56 #ifndef QT_NO_SYSTEMSEMAPHORE 57 58 #include "qsharedmemory_p.h" 59 #include <sys/types.h> 60 #ifdef QT_POSIX_IPC 61 # include <semaphore.h> 62 #endif 63 64 QT_BEGIN_NAMESPACE 65 66 class QSystemSemaphorePrivate 67 { 68 69 public: 70 QSystemSemaphorePrivate(); 71 makeKeyFileName()72 QString makeKeyFileName() 73 { 74 return QSharedMemoryPrivate::makePlatformSafeKey(key, QLatin1String("qipc_systemsem_")); 75 } 76 setError(QSystemSemaphore::SystemSemaphoreError e,const QString & message)77 inline void setError(QSystemSemaphore::SystemSemaphoreError e, const QString &message) 78 { error = e; errorString = message; } clearError()79 inline void clearError() 80 { setError(QSystemSemaphore::NoError, QString()); } 81 82 #ifdef Q_OS_WIN 83 Qt::HANDLE handle(QSystemSemaphore::AccessMode mode = QSystemSemaphore::Open); 84 void setErrorString(const QString &function); 85 #elif defined(QT_POSIX_IPC) 86 bool handle(QSystemSemaphore::AccessMode mode = QSystemSemaphore::Open); 87 void setErrorString(const QString &function); 88 #else 89 key_t handle(QSystemSemaphore::AccessMode mode = QSystemSemaphore::Open); 90 void setErrorString(const QString &function); 91 #endif 92 void cleanHandle(); 93 bool modifySemaphore(int count); 94 95 QString key; 96 QString fileName; 97 int initialValue; 98 #ifdef Q_OS_WIN 99 Qt::HANDLE semaphore; 100 Qt::HANDLE semaphoreLock; 101 #elif defined(QT_POSIX_IPC) 102 sem_t *semaphore; 103 bool createdSemaphore; 104 #else 105 key_t unix_key; 106 int semaphore; 107 bool createdFile; 108 bool createdSemaphore; 109 #endif 110 QString errorString; 111 QSystemSemaphore::SystemSemaphoreError error; 112 }; 113 114 QT_END_NAMESPACE 115 116 #endif // QT_NO_SYSTEMSEMAPHORE 117 118 #endif // QSYSTEMSEMAPHORE_P_H 119 120