intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 170 insertions, 0 deletions

diff --git a/contrib/libs/poco/Foundation/src/NamedMutex_UNIX.cpp b/contrib/libs/poco/Foundation/src/NamedMutex_UNIX.cpp
new file mode 100644
index 0000000000..6cfa1369c9
--- /dev/null
+++ b/contrib/libs/poco/Foundation/src/NamedMutex_UNIX.cpp
@@ -0,0 +1,170 @@
+//
+// NamedMutex_UNIX.cpp
+//
+// Library: Foundation
+// Package: Processes
+// Module:  NamedMutex
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#include "Poco/NamedMutex_UNIX.h"
+#include "Poco/Format.h"
+#include "Poco/Exception.h"
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <errno.h>
+#if defined(sun) || defined(__APPLE__) || defined(__osf__) || defined(_AIX)
+#include <semaphore.h>
+#else
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/sem.h>
+#endif
+
+
+namespace Poco {
+
+
+#if (POCO_OS == POCO_OS_LINUX) || (POCO_OS == POCO_OS_ANDROID) || (POCO_OS == POCO_OS_CYGWIN) || (POCO_OS == POCO_OS_FREE_BSD)
+	union semun
+	{
+		int                 val;
+		struct semid_ds*    buf;
+		unsigned short int* array;
+		struct seminfo*     __buf;
+	};
+#elif (POCO_OS == POCO_OS_HPUX)
+	union semun
+	{
+		int              val;
+		struct semid_ds* buf;
+		ushort*          array;
+	};
+#endif
+
+
+NamedMutexImpl::NamedMutexImpl(const std::string& name):
+	_name(name)
+{
+	std::string fileName = getFileName();
+#if defined(sun) || defined(__APPLE__) || defined(__osf__) || defined(__QNX__) || defined(_AIX)
+	_sem = sem_open(fileName.c_str(), O_CREAT, S_IRWXU | S_IRWXG | S_IRWXO, 1);
+	if ((long) _sem == (long) SEM_FAILED)
+		throw SystemException(Poco::format("cannot create named mutex %s (sem_open() failed, errno=%d)", fileName, errno), _name);
+#else
+	int fd = open(fileName.c_str(), O_RDONLY | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+	if (fd != -1)
+		close(fd);
+	else
+		throw SystemException(Poco::format("cannot create named mutex %s (lockfile)", fileName), _name);
+	key_t key = ftok(fileName.c_str(), 'p');
+	if (key == -1)
+		throw SystemException(Poco::format("cannot create named mutex %s (ftok() failed, errno=%d)", fileName, errno), _name);
+	_semid = semget(key, 1, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH | IPC_CREAT | IPC_EXCL);
+	if (_semid >= 0)
+	{
+		union semun arg;
+		arg.val = 1;
+		semctl(_semid, 0, SETVAL, arg);
+		_owned = true;
+		return;
+	}
+	else if (errno == EEXIST)
+	{
+		_semid = semget(key, 1, 0);
+		_owned = false;
+		if (_semid >= 0) return;
+	}
+
+	throw SystemException(Poco::format("cannot create named mutex %s (semget() failed, errno=%d)", fileName, errno), _name);
+#endif // defined(sun) || defined(__APPLE__) || defined(__osf__) || defined(__QNX__) || defined(_AIX)
+}
+
+
+NamedMutexImpl::~NamedMutexImpl()
+{
+#if defined(sun) || defined(__APPLE__) || defined(__osf__) || defined(__QNX__) || defined(_AIX)
+	sem_close(_sem);
+#else
+	if (_owned) semctl(_semid, 0, IPC_RMID, 0);
+#endif
+}
+
+
+void NamedMutexImpl::lockImpl()
+{
+#if defined(sun) || defined(__APPLE__) || defined(__osf__) || defined(__QNX__) || defined(_AIX)
+	int err;
+	do
+	{
+		err = sem_wait(_sem);
+	}
+	while (err && errno == EINTR);
+	if (err) throw SystemException("cannot lock named mutex", _name);
+#else
+	struct sembuf op;
+	op.sem_num = 0;
+	op.sem_op  = -1;
+	op.sem_flg = SEM_UNDO;
+	int err;
+	do
+	{
+		err = semop(_semid, &op, 1);
+	}
+	while (err && errno == EINTR);
+	if (err) throw SystemException("cannot lock named mutex", _name);
+#endif
+}
+
+
+bool NamedMutexImpl::tryLockImpl()
+{
+#if defined(sun) || defined(__APPLE__) || defined(__osf__) || defined(__QNX__) || defined(_AIX)
+	return sem_trywait(_sem) == 0;
+#else
+	struct sembuf op;
+	op.sem_num = 0;
+	op.sem_op  = -1;
+	op.sem_flg = SEM_UNDO | IPC_NOWAIT;
+	return semop(_semid, &op, 1) == 0;
+#endif
+}
+
+
+void NamedMutexImpl::unlockImpl()
+{
+#if defined(sun) || defined(__APPLE__) || defined(__osf__) || defined(__QNX__) || defined(_AIX)
+	if (sem_post(_sem) != 0)
+	   	throw SystemException("cannot unlock named mutex", _name);
+#else
+	struct sembuf op;
+	op.sem_num = 0;
+	op.sem_op  = 1;
+	op.sem_flg = SEM_UNDO;
+	if (semop(_semid, &op, 1) != 0)
+	   	throw SystemException("cannot unlock named mutex", _name);
+#endif
+}
+
+
+std::string NamedMutexImpl::getFileName()
+{
+#if defined(sun) || defined(__APPLE__) || defined(__QNX__)
+	std::string fn = "/";
+#else
+	std::string fn = "/tmp/";
+#endif
+	fn.append(_name);
+	fn.append(".mutex");
+	return fn;
+}
+
+
+} // namespace Poco
+