intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 270 insertions, 0 deletions

diff --git a/contrib/libs/poco/Foundation/include/Poco/Mutex.h b/contrib/libs/poco/Foundation/include/Poco/Mutex.h
new file mode 100644
index 0000000000..64d0efc06d
--- /dev/null
+++ b/contrib/libs/poco/Foundation/include/Poco/Mutex.h
@@ -0,0 +1,270 @@
+//
+// Mutex.h
+//
+// Library: Foundation
+// Package: Threading
+// Module:  Mutex
+//
+// Definition of the Mutex and FastMutex classes.
+//
+// Copyright (c) 2004-2008, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_Mutex_INCLUDED
+#define Foundation_Mutex_INCLUDED
+
+
+#include "Poco/Foundation.h"
+#include "Poco/Exception.h"
+#include "Poco/ScopedLock.h"
+
+
+#if defined(POCO_OS_FAMILY_WINDOWS)
+#if defined(_WIN32_WCE)
+#include "Poco/Mutex_WINCE.h"
+#else
+#include "Poco/Mutex_WIN32.h"
+#endif
+#elif defined(POCO_VXWORKS)
+#include "Poco/Mutex_VX.h"
+#else
+#include "Poco/Mutex_POSIX.h"
+#endif
+
+
+namespace Poco {
+
+
+class Foundation_API Mutex: private MutexImpl
+	/// A Mutex (mutual exclusion) is a synchronization 
+	/// mechanism used to control access to a shared resource
+	/// in a concurrent (multithreaded) scenario.
+	/// Mutexes are recursive, that is, the same mutex can be 
+	/// locked multiple times by the same thread (but, of course,
+	/// not by other threads).
+	/// Using the ScopedLock class is the preferred way to automatically
+	/// lock and unlock a mutex.
+{
+public:
+	typedef Poco::ScopedLock<Mutex> ScopedLock;
+	
+	Mutex();
+		/// creates the Mutex.
+		
+	~Mutex();
+		/// destroys the Mutex.
+
+	void lock();
+		/// Locks the mutex. Blocks if the mutex
+		/// is held by another thread.
+		
+	void lock(long milliseconds);
+		/// Locks the mutex. Blocks up to the given number of milliseconds
+		/// if the mutex is held by another thread. Throws a TimeoutException
+		/// if the mutex can not be locked within the given timeout.
+		///
+		/// Performance Note: On most platforms (including Windows), this member function is 
+		/// implemented using a loop calling (the equivalent of) tryLock() and Thread::sleep().
+		/// On POSIX platforms that support pthread_mutex_timedlock(), this is used.
+
+	bool tryLock();
+		/// Tries to lock the mutex. Returns false immediately
+		/// if the mutex is already held by another thread.
+		/// Returns true if the mutex was successfully locked.
+
+	bool tryLock(long milliseconds);
+		/// Locks the mutex. Blocks up to the given number of milliseconds
+		/// if the mutex is held by another thread.
+		/// Returns true if the mutex was successfully locked.
+		///
+		/// Performance Note: On most platforms (including Windows), this member function is 
+		/// implemented using a loop calling (the equivalent of) tryLock() and Thread::sleep().
+		/// On POSIX platforms that support pthread_mutex_timedlock(), this is used.
+
+	void unlock();
+		/// Unlocks the mutex so that it can be acquired by
+		/// other threads.
+	
+private:
+	Mutex(const Mutex&);
+	Mutex& operator = (const Mutex&);
+};
+
+
+class Foundation_API FastMutex: private FastMutexImpl
+	/// A FastMutex (mutual exclusion) is similar to a Mutex.
+	/// Unlike a Mutex, however, a FastMutex is not recursive,
+	/// which means that a deadlock will occur if the same
+	/// thread tries to lock a mutex it has already locked again.
+	/// Locking a FastMutex is faster than locking a recursive Mutex.
+	/// Using the ScopedLock class is the preferred way to automatically
+	/// lock and unlock a mutex.
+{
+public:
+	typedef Poco::ScopedLock<FastMutex> ScopedLock;
+
+	FastMutex();
+		/// creates the Mutex.
+		
+	~FastMutex();
+		/// destroys the Mutex.
+
+	void lock();
+		/// Locks the mutex. Blocks if the mutex
+		/// is held by another thread.
+
+	void lock(long milliseconds);
+		/// Locks the mutex. Blocks up to the given number of milliseconds
+		/// if the mutex is held by another thread. Throws a TimeoutException
+		/// if the mutex can not be locked within the given timeout.
+		///
+		/// Performance Note: On most platforms (including Windows), this member function is 
+		/// implemented using a loop calling (the equivalent of) tryLock() and Thread::sleep().
+		/// On POSIX platforms that support pthread_mutex_timedlock(), this is used.
+
+	bool tryLock();
+		/// Tries to lock the mutex. Returns false immediately
+		/// if the mutex is already held by another thread.
+		/// Returns true if the mutex was successfully locked.
+
+	bool tryLock(long milliseconds);
+		/// Locks the mutex. Blocks up to the given number of milliseconds
+		/// if the mutex is held by another thread.
+		/// Returns true if the mutex was successfully locked.
+		///
+		/// Performance Note: On most platforms (including Windows), this member function is 
+		/// implemented using a loop calling (the equivalent of) tryLock() and Thread::sleep().
+		/// On POSIX platforms that support pthread_mutex_timedlock(), this is used.
+
+	void unlock();
+		/// Unlocks the mutex so that it can be acquired by
+		/// other threads.
+	
+private:
+	FastMutex(const FastMutex&);
+	FastMutex& operator = (const FastMutex&);
+};
+
+
+class Foundation_API NullMutex
+	/// A NullMutex is an empty mutex implementation
+	/// which performs no locking at all. Useful in policy driven design
+	/// where the type of mutex used can be now a template parameter allowing the user to switch
+	/// between thread-safe and not thread-safe depending on his need
+	/// Works with the ScopedLock class
+{
+public:
+	typedef Poco::ScopedLock<NullMutex> ScopedLock;
+	
+	NullMutex()
+		/// Creates the NullMutex.
+	{
+	}
+		
+	~NullMutex()
+		/// Destroys the NullMutex.
+	{
+	}
+
+	void lock()
+		/// Does nothing.
+	{
+	}
+		
+	void lock(long)
+		/// Does nothing.
+	{
+	}
+
+	bool tryLock()
+		/// Does nothing and always returns true.
+	{
+		return true;
+	}
+
+	bool tryLock(long)
+		/// Does nothing and always returns true.
+	{
+		return true;
+	}
+
+	void unlock()
+		/// Does nothing.
+	{
+	}
+};
+
+
+//
+// inlines
+//
+inline void Mutex::lock()
+{
+	lockImpl();
+}
+
+
+inline void Mutex::lock(long milliseconds)
+{
+	if (!tryLockImpl(milliseconds))
+		throw TimeoutException();
+}
+
+
+inline bool Mutex::tryLock()
+{
+	return tryLockImpl();
+}
+
+
+inline bool Mutex::tryLock(long milliseconds)
+{
+	return tryLockImpl(milliseconds);
+}
+
+
+inline void Mutex::unlock()
+{
+	unlockImpl();
+}
+
+
+inline void FastMutex::lock()
+{
+	lockImpl();
+}
+
+
+inline void FastMutex::lock(long milliseconds)
+{
+	if (!tryLockImpl(milliseconds))
+		throw TimeoutException();
+}
+
+
+inline bool FastMutex::tryLock()
+{
+	return tryLockImpl();
+}
+
+
+inline bool FastMutex::tryLock(long milliseconds)
+{
+	return tryLockImpl(milliseconds);
+}
+
+
+inline void FastMutex::unlock()
+{
+	unlockImpl();
+}
+
+
+} // namespace Poco
+
+
+#endif // Foundation_Mutex_INCLUDED