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//
// Thread.h
//
// $Id: //poco/1.3/Foundation/include/Poco/Thread.h#2 $
//
// Library: Foundation
// Package: Threading
// Module: Thread
//
// Definition of the Thread class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
//
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
#ifndef Foundation_Thread_INCLUDED
#define Foundation_Thread_INCLUDED
#include "Poco/Foundation.h"
#include "Poco/Mutex.h"
#if defined(POCO_OS_FAMILY_WINDOWS)
#include "Poco/Thread_WIN32.h"
#else
#include "Poco/Thread_POSIX.h"
#endif
namespace Poco {
class Runnable;
class ThreadLocalStorage;
class Foundation_API Thread: private ThreadImpl
/// This class implements a platform-independent
/// wrapper to an operating system thread.
///
/// Every Thread object gets a unique (within
/// its process) numeric thread ID.
/// Furthermore, a thread can be assigned a name.
/// The name of a thread can be changed at any time.
{
public:
enum Priority
/// Thread priorities.
{
PRIO_LOWEST = PRIO_LOWEST_IMPL, /// The lowest thread priority.
PRIO_LOW = PRIO_LOW_IMPL, /// A lower than normal thread priority.
PRIO_NORMAL = PRIO_NORMAL_IMPL, /// The normal thread priority.
PRIO_HIGH = PRIO_HIGH_IMPL, /// A higher than normal thread priority.
PRIO_HIGHEST = PRIO_HIGHEST_IMPL /// The highest thread priority.
};
Thread();
/// Creates a thread. Call start() to start it.
Thread(const std::string& name);
/// Creates a named thread. Call start() to start it.
~Thread();
/// Destroys the thread.
int id() const;
/// Returns the unique thread ID of the thread.
std::string name() const;
/// Returns the name of the thread.
std::string getName() const;
/// Returns teh name of the thread.
void setName(const std::string& name);
/// Sets the name of the thread.
void setPriority(Priority prio);
/// Sets the thread's priority.
///
/// Some platform only allow changing a thread's priority
/// if the process has certain privileges.
Priority getPriority() const;
/// Returns the thread's priority.
void start(Runnable& target);
/// Starts the thread with the given target.
void join();
/// Waits until the thread completes execution.
/// If multiple threads try to join the same
/// thread, the result is undefined.
void join(long milliseconds);
/// Waits for at most the given interval for the thread
/// to complete. Throws a TimeoutException if the thread
/// does not complete within the specified time interval.
bool tryJoin(long milliseconds);
/// Waits for at most the given interval for the thread
/// to complete. Returns true if the thread has finished,
/// false otherwise.
bool isRunning() const;
/// Returns true if the thread is running.
static void sleep(long milliseconds);
/// Suspends the current thread for the specified
/// amount of time.
static void yield();
/// Yields cpu to other threads.
static Thread* current();
/// Returns the Thread object for the currently active thread.
/// If the current thread is the main thread, 0 is returned.
protected:
ThreadLocalStorage& tls();
/// Returns a reference to the thread's local storage.
void clearTLS();
/// Clears the thread's local storage.
std::string makeName();
/// Creates a unique name for a thread.
static int uniqueId();
/// Creates and returns a unique id for a thread.
private:
Thread(const Thread&);
Thread& operator = (const Thread&);
int _id;
std::string _name;
ThreadLocalStorage* _pTLS;
mutable FastMutex _mutex;
friend class ThreadLocalStorage;
friend class PooledThread;
};
//
// inlines
//
inline int Thread::id() const
{
return _id;
}
inline std::string Thread::name() const
{
FastMutex::ScopedLock lock(_mutex);
return _name;
}
inline std::string Thread::getName() const
{
FastMutex::ScopedLock lock(_mutex);
return _name;
}
inline bool Thread::isRunning() const
{
return isRunningImpl();
}
inline void Thread::sleep(long milliseconds)
{
sleepImpl(milliseconds);
}
inline void Thread::yield()
{
yieldImpl();
}
inline Thread* Thread::current()
{
return static_cast<Thread*>(currentImpl());
}
} // namespace Poco
#endif // Foundation_Thread_INCLUDED
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