lunchbox::Thread Class Reference

Utility class to execute code in a separate execution thread. More...

#include <thread.h>

Collaboration diagram for lunchbox::Thread:

Public Types
enum	Affinity { NONE = 0, CORE = 1, SOCKET = -65536, SOCKET_MAX = -1024 }
	Enumeration values for thread affinity. More...

Public Member Functions
	Thread ()
	Construct a new thread. More...
	Thread (const Thread &from)
	Copy constructor. More...
virtual	~Thread ()
	Destruct the thread. More...
virtual bool	start ()
	Start the thread. More...
virtual bool	init ()
	The init function for the child thread. More...
virtual void	run ()=0
	The entry function for the child thread. More...
virtual void	exit ()
	Exit the child thread immediately. More...
void	cancel ()
	Cancel (stop) the child thread. More...
bool	join ()
	Wait for the exit of the child thread. More...
bool	isStopped () const
	Return if the thread is stopped. More...
bool	isRunning () const
	Return if the thread is running. More...
bool	isCurrent () const

Static Public Member Functions
static ThreadID	getSelfThreadID ()
static void	yield ()
static void	setName (const std::string &name)
static void	setAffinity (const int32_t affinity)

Friends
void	abort (bool)

Detailed Description

Utility class to execute code in a separate execution thread.

Deprecated:

Use Boost.Thread

Example:

/* Copyright (c) 2006-2014, Stefan Eilemann <eile@equalizergraphics.com>
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License version 2.1 as published
 * by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <iostream>
#include <lunchbox/clock.h>
#include <lunchbox/sleep.h>
#include <lunchbox/test.h>
#include <lunchbox/thread.h>

#define NTHREADS 256

class LoadThread : public lunchbox::Thread
{
public:
    virtual ~LoadThread() {}
    virtual void run() {}
};

class InitThread : public LoadThread
{
public:
    InitThread()
        : initLeft(false)
    {
    }
    virtual ~InitThread() {}
    virtual bool init()
    {
        lunchbox::sleep(10);
        initLeft = true;
        return true;
    }

    virtual void run()
    {
        TEST(!join());
        exit();
    }

    bool initLeft;
};

class FailThread : public InitThread
{
public:
    virtual ~FailThread() {}
    virtual bool init() { return false; }
};

int main(int, char**)
{
    LoadThread loadThreads[NTHREADS];
    lunchbox::Clock clock;

    for (size_t i = 0; i < NTHREADS; ++i)
        TEST(loadThreads[i].start());

    for (size_t i = 0; i < NTHREADS; ++i)
        TEST(loadThreads[i].join());
    const float time = clock.getTimef();
    std::cout << "Spawned and joined " << NTHREADS << " loadThreads in " << time
              << " ms (" << (NTHREADS / time) << " threads/ms)" << std::endl;

    for (size_t i = 0; i < NTHREADS; ++i)
        TEST(loadThreads[i].isStopped());

    InitThread initThreads[NTHREADS];

    clock.reset();
    for (size_t i = 0; i < NTHREADS; ++i)
    {
        TEST(initThreads[i].start());
        TEST(initThreads[i].initLeft == true);
    }
#ifdef _MSC_VER // resolution of Sleep is not high enough...
    TESTINFO(clock.getTimef() + 1.f > NTHREADS * 10, clock.getTimef());
#else
    TESTINFO(clock.getTimef() > NTHREADS * 10, clock.getTimef());
#endif

    for (size_t i = 0; i < NTHREADS; ++i)
        TEST(initThreads[i].join());

    FailThread failThread;
    TEST(!failThread.start());
    TEST(!failThread.isRunning());
    TEST(failThread.isStopped());
    TEST(!failThread.join());

    return EXIT_SUCCESS;
}

Definition at line 44 of file thread.h.

Member Enumeration Documentation

enum lunchbox::Thread::Affinity

Enumeration values for thread affinity.

Enumerator
NONE	Don't set any affinity.
CORE	Bind to a specific CPU core.
SOCKET	Bind to all cores of a specific socket (CPU)
SOCKET_MAX	Highest bindable CPU.

Definition at line 48 of file thread.h.

Constructor & Destructor Documentation

lunchbox::Thread::Thread

(

)

Construct a new thread.

Version

1.0

lunchbox::Thread::Thread ( const Thread &  from )

explicit

Copy constructor.

Version

1.1.2

virtual lunchbox::Thread::~Thread ( )

virtual

Destruct the thread.

Version

1.0

Member Function Documentation

void lunchbox::Thread::cancel

(

)

Cancel (stop) the child thread.

This function is not to be called from the child thread.

Version

1.0

virtual void lunchbox::Thread::exit ( )

virtual

Exit the child thread immediately.

This function does not return. It is only to be called from the child thread.

Version

1.0

static ThreadID lunchbox::Thread::getSelfThreadID ( )

static

Returns

a unique identifier for the calling thread.

Version

1.0

Referenced by init().

Here is the caller graph for this function:

virtual bool lunchbox::Thread::init ( )

inlinevirtual

The init function for the child thread.

The parent thread will not be unlocked before this function has been executed. If the thread initialization fails, that is, this method does return false, the thread will be stopped and the start() method will return false.

Returns

the success value of the thread initialization.

Version

1.0

Definition at line 86 of file thread.h.

References lunchbox::exit(), getSelfThreadID(), and lunchbox::operator<<().

Here is the call graph for this function:

bool lunchbox::Thread::isCurrent

(

)

const

Returns

true if the calling thread is the same thread as this thread, false otherwise.

Version

1.0

bool lunchbox::Thread::isRunning

(

)

const

Return if the thread is running.

Note that the thread may be neither running nor stopped if it is currently starting or stopping.

Returns

true if the thread is running, false if not.

Version

1.0

bool lunchbox::Thread::isStopped

(

)

const

Return if the thread is stopped.

Note that the thread may be neither running nor stopped if it is currently starting or stopping.

Returns

true if the thread is stopped, false if not.

Version

1.0

bool lunchbox::Thread::join

(

)

Wait for the exit of the child thread.

Returns

true if the thread was joined, false otherwise.

Version

1.0

virtual void lunchbox::Thread::run ( )

pure virtual

The entry function for the child thread.

This method should contain the main execution routine for the thread and is called after a successful init().

Version

1.0

virtual bool lunchbox::Thread::start ( )

virtual

Start the thread.

Returns

true if the thread was launched and initialized successfully, false otherwise.

See also

init(), run()

Version

1.0

---

The documentation for this class was generated from the following file:

• thread.h