non/nonlib/Thread.C

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/*******************************************************************************/
/* Copyright (C) 2008 Jonathan Moore Liles */
/* */
/* This program is free software; you can redistribute it and/or modify it */
/* under the terms of the GNU General Public License as published by the */
/* Free Software Foundation; either version 2 of the License, or (at your */
/* option) any later version. */
/* */
/* This program 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 General Public License for */
/* more details. */
/* */
/* You should have received a copy of the GNU General Public License along */
/* with This program; see the file COPYING. If not,write to the Free Software */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*******************************************************************************/
#include "Thread.H"
#include <assert.h>
#include <string.h>
pthread_key_t Thread::_current = 0;
Thread::Thread ( )
{
_thread = 0;
_running = false;
_name = 0;
}
Thread::Thread ( const char *name )
{
_thread = 0;
_running = false;
_name = name;
}
void
Thread::init ( void )
{
pthread_key_create( &_current, NULL );
}
bool
Thread::is ( const char *name )
{
return ! strcmp( Thread::current()->name(), name );
}
/** to be used by existing threads (that won't call clone()) */
void
Thread::set ( const char *name )
{
_thread = pthread_self();
_name = name;
_running = true;
pthread_setspecific( _current, (void*)this );
}
Thread *
Thread::current ( void )
{
return (Thread*)pthread_getspecific( _current );
}
struct thread_data
{
void *(*entry_point)(void *);
void *arg;
void *t;
};
void *
Thread::run_thread ( void *arg )
{
thread_data td = *(thread_data *)arg;
delete (thread_data*)arg;
pthread_setspecific( _current, td.t );
((Thread*)td.t)->_running = true;
void * r = td.entry_point( td.arg );
((Thread*)td.t)->_running = false;
return r;
}
bool
Thread::clone ( void *(*entry_point)(void *), void *arg )
{
assert( ! _thread );
thread_data *td = new thread_data;
td->entry_point = entry_point;
td->arg = arg;
td->t = this;
if ( pthread_create( &_thread, NULL, run_thread, td ) != 0 )
return false;
return true;
}
void
Thread::detach ( void )
{
pthread_detach( _thread );
_thread = 0;
}
void
Thread::cancel ( void )
{
pthread_cancel( _thread );
_thread = 0;
}
void
Thread::join ( void )
{
if ( _thread != 0 )
{
/* not joined yet, go ahead. */
pthread_join( _thread, NULL );
}
_thread = 0;
}
/* never call this unless some other thread will be calling 'join' on
* this one, otherwise, running() will return true even though the
* thread is dead */
void
Thread::exit ( void *retval )
{
_running = false;
pthread_exit( retval );
}