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b0581433a7
fix: remove executable flag and change back to 100644 (was 100755) Signed-off-by: Roger Meier <r.meier@siemens.com>
151 lines
3.6 KiB
C++
151 lines
3.6 KiB
C++
//
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// NamedEvent_UNIX.cpp
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//
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// $Id: //poco/1.4/Foundation/src/NamedEvent_UNIX.cpp#1 $
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//
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// Library: Foundation
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// Package: Processes
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// Module: NamedEvent
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#include "Poco/NamedEvent_UNIX.h"
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#include "Poco/Format.h"
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#include "Poco/Exception.h"
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <errno.h>
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#if defined(sun) || defined(__APPLE__) || defined(__osf__) || defined(__QNX__) || defined(_AIX)
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#include <semaphore.h>
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#else
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/sem.h>
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#endif
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namespace Poco {
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#if (POCO_OS == POCO_OS_LINUX) || (POCO_OS == POCO_OS_CYGWIN) || (POCO_OS == POCO_OS_FREE_BSD)
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union semun
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{
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int val;
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struct semid_ds* buf;
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unsigned short int* array;
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struct seminfo* __buf;
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};
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#elif (POCO_OS == POCO_OS_HPUX)
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union semun
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{
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int val;
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struct semid_ds* buf;
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ushort* array;
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};
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#endif
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NamedEventImpl::NamedEventImpl(const std::string& name):
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_name(name)
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{
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std::string fileName = getFileName();
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#if defined(sun) || defined(__APPLE__) || defined(__osf__) || defined(__QNX__) || defined(_AIX)
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_sem = sem_open(fileName.c_str(), O_CREAT, S_IRWXU | S_IRWXG | S_IRWXO, 0);
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if ((long) _sem == (long) SEM_FAILED)
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throw SystemException(Poco::format("cannot create named mutex %s (sem_open() failed, errno=%d)", fileName, errno), _name);
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#else
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int fd = open(fileName.c_str(), O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
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if (fd != -1)
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close(fd);
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else
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throw SystemException(Poco::format("cannot create named event %s (lockfile)", fileName), _name);
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key_t key = ftok(fileName.c_str(), 0);
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if (key == -1)
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throw SystemException(Poco::format("cannot create named mutex %s (ftok() failed, errno=%d)", fileName, errno), _name);
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_semid = semget(key, 1, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH | IPC_CREAT | IPC_EXCL);
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if (_semid >= 0)
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{
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union semun arg;
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arg.val = 0;
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semctl(_semid, 0, SETVAL, arg);
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}
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else if (errno == EEXIST)
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{
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_semid = semget(key, 1, 0);
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}
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else throw SystemException(Poco::format("cannot create named mutex %s (semget() failed, errno=%d)", fileName, errno), _name);
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#endif // defined(sun) || defined(__APPLE__) || defined(__osf__) || defined(__QNX__) || defined(_AIX)
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}
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NamedEventImpl::~NamedEventImpl()
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{
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#if defined(sun) || defined(__APPLE__) || defined(__osf__) || defined(__QNX__) || defined(_AIX)
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sem_close(_sem);
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#endif
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}
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void NamedEventImpl::setImpl()
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{
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#if defined(sun) || defined(__APPLE__) || defined(__osf__) || defined(__QNX__) || defined(_AIX)
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if (sem_post(_sem) != 0)
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throw SystemException("cannot set named event", _name);
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#else
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struct sembuf op;
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op.sem_num = 0;
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op.sem_op = 1;
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op.sem_flg = 0;
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if (semop(_semid, &op, 1) != 0)
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throw SystemException("cannot set named event", _name);
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#endif
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}
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void NamedEventImpl::waitImpl()
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{
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#if defined(sun) || defined(__APPLE__) || defined(__osf__) || defined(__QNX__) || defined(_AIX)
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int err;
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do
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{
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err = sem_wait(_sem);
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}
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while (err && errno == EINTR);
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if (err) throw SystemException("cannot wait for named event", _name);
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#else
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struct sembuf op;
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op.sem_num = 0;
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op.sem_op = -1;
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op.sem_flg = 0;
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int err;
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do
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{
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err = semop(_semid, &op, 1);
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}
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while (err && errno == EINTR);
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if (err) throw SystemException("cannot wait for named event", _name);
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#endif
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}
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std::string NamedEventImpl::getFileName()
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{
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#if defined(sun) || defined(__APPLE__) || defined(__QNX__)
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std::string fn = "/";
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#else
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std::string fn = "/tmp/";
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#endif
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fn.append(_name);
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fn.append(".event");
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return fn;
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}
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} // namespace Poco
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