ref: bf5dc91f8d7bc2035effd18290c523050fa1b2cd
dir: /common/threads.c/
/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
This file is part of Quake III Arena source code.
Quake III Arena source code 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.
Quake III Arena source code 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 Foobar; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
#include "cmdlib.h"
#include "threads.h"
#define MAX_THREADS 64
int dispatch;
int workcount;
int oldf;
qboolean pacifier;
qboolean threaded;
/*
=============
GetThreadWork
=============
*/
int GetThreadWork (void)
{
int r;
int f;
ThreadLock ();
if (dispatch == workcount)
{
ThreadUnlock ();
return -1;
}
f = 10*dispatch / workcount;
if (f != oldf)
{
oldf = f;
if (pacifier)
_printf ("%i...", f);
}
r = dispatch;
dispatch++;
ThreadUnlock ();
return r;
}
void (*workfunction) (int);
void ThreadWorkerFunction (int threadnum)
{
int work;
while (1)
{
work = GetThreadWork ();
if (work == -1)
break;
//_printf ("thread %i, work %i\n", threadnum, work);
workfunction(work);
}
}
void RunThreadsOnIndividual (int workcnt, qboolean showpacifier, void(*func)(int))
{
if (numthreads == -1)
ThreadSetDefault ();
workfunction = func;
RunThreadsOn (workcnt, showpacifier, ThreadWorkerFunction);
}
/*
===================================================================
WIN32
===================================================================
*/
#ifdef WIN32
#define USED
#include <windows.h>
int numthreads = -1;
CRITICAL_SECTION crit;
static int enter;
void ThreadSetDefault (void)
{
SYSTEM_INFO info;
if (numthreads == -1) // not set manually
{
GetSystemInfo (&info);
numthreads = info.dwNumberOfProcessors;
if (numthreads < 1 || numthreads > 32)
numthreads = 1;
}
qprintf ("%i threads\n", numthreads);
}
void ThreadLock (void)
{
if (!threaded)
return;
EnterCriticalSection (&crit);
if (enter)
Error ("Recursive ThreadLock\n");
enter = 1;
}
void ThreadUnlock (void)
{
if (!threaded)
return;
if (!enter)
Error ("ThreadUnlock without lock\n");
enter = 0;
LeaveCriticalSection (&crit);
}
/*
=============
RunThreadsOn
=============
*/
void RunThreadsOn (int workcnt, qboolean showpacifier, void(*func)(int))
{
int threadid[MAX_THREADS];
HANDLE threadhandle[MAX_THREADS];
int i;
int start, end;
start = I_FloatTime ();
dispatch = 0;
workcount = workcnt;
oldf = -1;
pacifier = showpacifier;
threaded = qtrue;
//
// run threads in parallel
//
InitializeCriticalSection (&crit);
if (numthreads == 1)
{ // use same thread
func (0);
}
else
{
for (i=0 ; i<numthreads ; i++)
{
threadhandle[i] = CreateThread(
NULL, // LPSECURITY_ATTRIBUTES lpsa,
0, // DWORD cbStack,
(LPTHREAD_START_ROUTINE)func, // LPTHREAD_START_ROUTINE lpStartAddr,
(LPVOID)i, // LPVOID lpvThreadParm,
0, // DWORD fdwCreate,
&threadid[i]);
}
for (i=0 ; i<numthreads ; i++)
WaitForSingleObject (threadhandle[i], INFINITE);
}
DeleteCriticalSection (&crit);
threaded = qfalse;
end = I_FloatTime ();
if (pacifier)
_printf (" (%i)\n", end-start);
}
#endif
/*
===================================================================
OSF1
===================================================================
*/
#ifdef __osf__
#define USED
int numthreads = 4;
void ThreadSetDefault (void)
{
if (numthreads == -1) // not set manually
{
numthreads = 4;
}
}
#include <pthread.h>
pthread_mutex_t *my_mutex;
void ThreadLock (void)
{
if (my_mutex)
pthread_mutex_lock (my_mutex);
}
void ThreadUnlock (void)
{
if (my_mutex)
pthread_mutex_unlock (my_mutex);
}
/*
=============
RunThreadsOn
=============
*/
void RunThreadsOn (int workcnt, qboolean showpacifier, void(*func)(int))
{
int i;
pthread_t work_threads[MAX_THREADS];
pthread_addr_t status;
pthread_attr_t attrib;
pthread_mutexattr_t mattrib;
int start, end;
start = I_FloatTime ();
dispatch = 0;
workcount = workcnt;
oldf = -1;
pacifier = showpacifier;
threaded = qtrue;
if (pacifier)
setbuf (stdout, NULL);
if (!my_mutex)
{
my_mutex = malloc (sizeof(*my_mutex));
if (pthread_mutexattr_create (&mattrib) == -1)
Error ("pthread_mutex_attr_create failed");
if (pthread_mutexattr_setkind_np (&mattrib, MUTEX_FAST_NP) == -1)
Error ("pthread_mutexattr_setkind_np failed");
if (pthread_mutex_init (my_mutex, mattrib) == -1)
Error ("pthread_mutex_init failed");
}
if (pthread_attr_create (&attrib) == -1)
Error ("pthread_attr_create failed");
if (pthread_attr_setstacksize (&attrib, 0x100000) == -1)
Error ("pthread_attr_setstacksize failed");
for (i=0 ; i<numthreads ; i++)
{
if (pthread_create(&work_threads[i], attrib
, (pthread_startroutine_t)func, (pthread_addr_t)i) == -1)
Error ("pthread_create failed");
}
for (i=0 ; i<numthreads ; i++)
{
if (pthread_join (work_threads[i], &status) == -1)
Error ("pthread_join failed");
}
threaded = qfalse;
end = I_FloatTime ();
if (pacifier)
_printf (" (%i)\n", end-start);
}
#endif
/*
===================================================================
IRIX
===================================================================
*/
#ifdef _MIPS_ISA
#define USED
#include <task.h>
#include <abi_mutex.h>
#include <sys/types.h>
#include <sys/prctl.h>
int numthreads = -1;
abilock_t lck;
void ThreadSetDefault (void)
{
if (numthreads == -1)
numthreads = prctl(PR_MAXPPROCS);
_printf ("%i threads\n", numthreads);
usconfig (CONF_INITUSERS, numthreads);
}
void ThreadLock (void)
{
spin_lock (&lck);
}
void ThreadUnlock (void)
{
release_lock (&lck);
}
/*
=============
RunThreadsOn
=============
*/
void RunThreadsOn (int workcnt, qboolean showpacifier, void(*func)(int))
{
int i;
int pid[MAX_THREADS];
int start, end;
start = I_FloatTime ();
dispatch = 0;
workcount = workcnt;
oldf = -1;
pacifier = showpacifier;
threaded = qtrue;
if (pacifier)
setbuf (stdout, NULL);
init_lock (&lck);
for (i=0 ; i<numthreads-1 ; i++)
{
pid[i] = sprocsp ( (void (*)(void *, size_t))func, PR_SALL, (void *)i
, NULL, 0x200000); // 2 meg stacks
if (pid[i] == -1)
{
perror ("sproc");
Error ("sproc failed");
}
}
func(i);
for (i=0 ; i<numthreads-1 ; i++)
wait (NULL);
threaded = qfalse;
end = I_FloatTime ();
if (pacifier)
_printf (" (%i)\n", end-start);
}
#endif
/*
=======================================================================
SINGLE THREAD
=======================================================================
*/
#ifndef USED
int numthreads = 1;
void ThreadSetDefault (void)
{
numthreads = 1;
}
void ThreadLock (void)
{
}
void ThreadUnlock (void)
{
}
/*
=============
RunThreadsOn
=============
*/
void RunThreadsOn (int workcnt, qboolean showpacifier, void(*func)(int))
{
int i;
int start, end;
dispatch = 0;
workcount = workcnt;
oldf = -1;
pacifier = showpacifier;
start = I_FloatTime ();
func(0);
end = I_FloatTime ();
if (pacifier)
_printf (" (%i)\n", end-start);
}
#endif