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l_threads.c
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l_threads.c
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/*
===========================================================================
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 "l_cmd.h"
#include "l_threads.h"
#include "l_log.h"
#include "l_mem.h"
#define MAX_THREADS 64
//#define THREAD_DEBUG
int dispatch;
int workcount;
int oldf;
qboolean pacifier;
qboolean threaded;
void (*workfunction) (int);
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
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);
} //end if
r = dispatch;
dispatch++;
ThreadUnlock ();
return r;
} //end of the function GetThreadWork
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadWorkerFunction(int threadnum)
{
int work;
while(1)
{
work = GetThreadWork ();
if (work == -1)
break;
//printf ("thread %i, work %i\n", threadnum, work);
workfunction(work);
} //end while
} //end of the function ThreadWorkerFunction
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void RunThreadsOnIndividual (int workcnt, qboolean showpacifier, void(*func)(int))
{
if (numthreads == -1)
ThreadSetDefault ();
workfunction = func;
RunThreadsOn (workcnt, showpacifier, ThreadWorkerFunction);
} //end of the function RunThreadsOnIndividual
//===================================================================
//
// WIN32
//
//===================================================================
#if defined(WIN32) || defined(_WIN32)
#define USED
#include <windows.h>
typedef struct thread_s
{
HANDLE handle;
int threadid;
int id;
struct thread_s *next;
} thread_t;
thread_t *firstthread;
thread_t *lastthread;
int currentnumthreads;
int currentthreadid;
int numthreads = 1;
CRITICAL_SECTION crit;
HANDLE semaphore;
static int enter;
static int numwaitingthreads = 0;
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadSetDefault(void)
{
SYSTEM_INFO info;
if (numthreads == -1) // not set manually
{
GetSystemInfo (&info);
numthreads = info.dwNumberOfProcessors;
if (numthreads < 1 || numthreads > 32)
numthreads = 1;
} //end if
qprintf ("%i threads\n", numthreads);
} //end of the function ThreadSetDefault
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadLock(void)
{
if (!threaded)
{
Error("ThreadLock: !threaded");
return;
} //end if
EnterCriticalSection(&crit);
if (enter)
Error("Recursive ThreadLock\n");
enter = 1;
} //end of the function ThreadLock
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadUnlock (void)
{
if (!threaded)
{
Error("ThreadUnlock: !threaded");
return;
} //end if
if (!enter)
Error("ThreadUnlock without lock\n");
enter = 0;
LeaveCriticalSection(&crit);
} //end of the function ThreadUnlock
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadSetupLock(void)
{
Log_Print("Win32 multi-threading\n");
InitializeCriticalSection(&crit);
threaded = true; //Stupid me... forgot this!!!
currentnumthreads = 0;
currentthreadid = 0;
} //end of the function ThreadInitLock
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadShutdownLock(void)
{
DeleteCriticalSection(&crit);
threaded = false; //Stupid me... forgot this!!!
} //end of the function ThreadShutdownLock
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadSetupSemaphore(void)
{
semaphore = CreateSemaphore(NULL, 0, 99999999, "bspc");
} //end of the function ThreadSetupSemaphore
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadShutdownSemaphore(void)
{
} //end of the function ThreadShutdownSemaphore
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadSemaphoreWait(void)
{
WaitForSingleObject(semaphore, INFINITE);
} //end of the function ThreadSemaphoreWait
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadSemaphoreIncrease(int count)
{
ReleaseSemaphore(semaphore, count, NULL);
} //end of the function ThreadSemaphoreIncrease
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void RunThreadsOn(int workcnt, qboolean showpacifier, void(*func)(int))
{
int threadid[MAX_THREADS];
HANDLE threadhandle[MAX_THREADS];
int i;
int start, end;
Log_Print("Win32 multi-threading\n");
start = I_FloatTime ();
dispatch = 0;
workcount = workcnt;
oldf = -1;
pacifier = showpacifier;
threaded = true;
if (numthreads == -1)
ThreadSetDefault ();
if (numthreads < 1 || numthreads > MAX_THREADS) numthreads = 1;
//
// run threads in parallel
//
InitializeCriticalSection (&crit);
numwaitingthreads = 0;
if (numthreads == 1)
{ // use same thread
func (0);
} //end if
else
{
// printf("starting %d threads\n", numthreads);
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]);
// printf("started thread %d\n", i);
} //end for
for (i = 0; i < numthreads; i++)
WaitForSingleObject (threadhandle[i], INFINITE);
} //end else
DeleteCriticalSection (&crit);
threaded = false;
end = I_FloatTime ();
if (pacifier) printf (" (%i)\n", end-start);
} //end of the function RunThreadsOn
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void AddThread(void (*func)(int))
{
thread_t *thread;
if (numthreads == 1)
{
if (currentnumthreads >= numthreads) return;
currentnumthreads++;
func(-1);
currentnumthreads--;
} //end if
else
{
ThreadLock();
if (currentnumthreads >= numthreads)
{
ThreadUnlock();
return;
} //end if
//allocate new thread
thread = GetMemory(sizeof(thread_t));
if (!thread) Error("can't allocate memory for thread\n");
//
thread->threadid = currentthreadid;
thread->handle = CreateThread(
NULL, // LPSECURITY_ATTRIBUTES lpsa,
0, // DWORD cbStack,
(LPTHREAD_START_ROUTINE)func, // LPTHREAD_START_ROUTINE lpStartAddr,
(LPVOID) thread->threadid, // LPVOID lpvThreadParm,
0, // DWORD fdwCreate,
&thread->id);
//add the thread to the end of the list
thread->next = NULL;
if (lastthread) lastthread->next = thread;
else firstthread = thread;
lastthread = thread;
//
#ifdef THREAD_DEBUG
qprintf("added thread with id %d\n", thread->threadid);
#endif //THREAD_DEBUG
//
currentnumthreads++;
currentthreadid++;
//
ThreadUnlock();
} //end else
} //end of the function AddThread
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void RemoveThread(int threadid)
{
thread_t *thread, *last;
//if a single thread
if (threadid == -1) return;
//
ThreadLock();
last = NULL;
for (thread = firstthread; thread; thread = thread->next)
{
if (thread->threadid == threadid)
{
if (last) last->next = thread->next;
else firstthread = thread->next;
if (!thread->next) lastthread = last;
//
FreeMemory(thread);
currentnumthreads--;
#ifdef THREAD_DEBUG
qprintf("removed thread with id %d\n", threadid);
#endif //THREAD_DEBUG
break;
} //end if
last = thread;
} //end if
if (!thread) Error("couldn't find thread with id %d", threadid);
ThreadUnlock();
} //end of the function RemoveThread
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void WaitForAllThreadsFinished(void)
{
HANDLE handle;
ThreadLock();
while(firstthread)
{
handle = firstthread->handle;
ThreadUnlock();
WaitForSingleObject(handle, INFINITE);
ThreadLock();
} //end while
ThreadUnlock();
} //end of the function WaitForAllThreadsFinished
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
int GetNumThreads(void)
{
return currentnumthreads;
} //end of the function GetNumThreads
#endif
//===================================================================
//
// OSF1
//
//===================================================================
#if defined(__osf__)
#define USED
#include <pthread.h>
typedef struct thread_s
{
pthread_t thread;
int threadid;
int id;
struct thread_s *next;
} thread_t;
thread_t *firstthread;
thread_t *lastthread;
int currentnumthreads;
int currentthreadid;
int numthreads = 1;
pthread_mutex_t my_mutex;
pthread_attr_t attrib;
static int enter;
static int numwaitingthreads = 0;
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadSetDefault(void)
{
if (numthreads == -1) // not set manually
{
numthreads = 1;
} //end if
qprintf("%i threads\n", numthreads);
} //end of the function ThreadSetDefault
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadLock(void)
{
if (!threaded)
{
Error("ThreadLock: !threaded");
return;
} //end if
if (my_mutex)
{
pthread_mutex_lock(my_mutex);
} //end if
if (enter)
Error("Recursive ThreadLock\n");
enter = 1;
} //end of the function ThreadLock
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadUnlock(void)
{
if (!threaded)
{
Error("ThreadUnlock: !threaded");
return;
} //end if
if (!enter)
Error("ThreadUnlock without lock\n");
enter = 0;
if (my_mutex)
{
pthread_mutex_unlock(my_mutex);
} //end if
} //end of the function ThreadUnlock
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadSetupLock(void)
{
pthread_mutexattr_t mattrib;
Log_Print("pthread multi-threading\n");
if (!my_mutex)
{
my_mutex = GetMemory(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");
threaded = true;
currentnumthreads = 0;
currentthreadid = 0;
} //end of the function ThreadInitLock
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadShutdownLock(void)
{
threaded = false;
} //end of the function ThreadShutdownLock
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
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;
Log_Print("pthread multi-threading\n");
start = I_FloatTime ();
dispatch = 0;
workcount = workcnt;
oldf = -1;
pacifier = showpacifier;
threaded = true;
if (numthreads < 1 || numthreads > MAX_THREADS) numthreads = 1;
if (pacifier)
setbuf (stdout, NULL);
if (!my_mutex)
{
my_mutex = GetMemory(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 = false;
end = I_FloatTime ();
if (pacifier)
printf (" (%i)\n", end-start);
} //end of the function RunThreadsOn
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void AddThread(void (*func)(int))
{
thread_t *thread;
if (numthreads == 1)
{
if (currentnumthreads >= numthreads) return;
currentnumthreads++;
func(-1);
currentnumthreads--;
} //end if
else
{
ThreadLock();
if (currentnumthreads >= numthreads)
{
ThreadUnlock();
return;
} //end if
//allocate new thread
thread = GetMemory(sizeof(thread_t));
if (!thread) Error("can't allocate memory for thread\n");
//
thread->threadid = currentthreadid;
if (pthread_create(&thread->thread,
attrib,
(pthread_startroutine_t)func,
(pthread_addr_t)thread->threadid) == -1) {
Error ("pthread_create failed");
}
//add the thread to the end of the list
thread->next = NULL;
if (lastthread) lastthread->next = thread;
else firstthread = thread;
lastthread = thread;
//
#ifdef THREAD_DEBUG
qprintf("added thread with id %d\n", thread->threadid);
#endif //THREAD_DEBUG
//
currentnumthreads++;
currentthreadid++;
//
ThreadUnlock();
} //end else
} //end of the function AddThread
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void RemoveThread(int threadid)
{
thread_t *thread, *last;
//if a single thread
if (threadid == -1) return;
//
ThreadLock();
last = NULL;
for (thread = firstthread; thread; thread = thread->next)
{
if (thread->threadid == threadid)
{
if (last) last->next = thread->next;
else firstthread = thread->next;
if (!thread->next) lastthread = last;
//
FreeMemory(thread);
currentnumthreads--;
#ifdef THREAD_DEBUG
qprintf("removed thread with id %d\n", threadid);
#endif //THREAD_DEBUG
break;
} //end if
last = thread;
} //end if
if (!thread) Error("couldn't find thread with id %d", threadid);
ThreadUnlock();
} //end of the function RemoveThread
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void WaitForAllThreadsFinished(void)
{
pthread_t *thread;
pthread_addr_t status;
ThreadLock();
while(firstthread)
{
thread = &firstthread->thread;
ThreadUnlock();
if (pthread_join(*thread, &status) == -1)
Error("pthread_join failed");
ThreadLock();
} //end while
ThreadUnlock();
} //end of the function WaitForAllThreadsFinished
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
int GetNumThreads(void)
{
return currentnumthreads;
} //end of the function GetNumThreads
#endif
//===================================================================
//
// LINUX
//
//===================================================================
#if defined(LINUX)
#define USED
#include <stdint.h>
#include <pthread.h>
#include <semaphore.h>
#define pthread_startroutine_t void *(*)(void *)
typedef struct thread_s
{
pthread_t thread;
int threadid;
int id;
struct thread_s *next;
} thread_t;
thread_t *firstthread;
thread_t *lastthread;
int currentnumthreads;
int currentthreadid;
int numthreads = 1;
pthread_mutex_t my_mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_attr_t attrib;
sem_t semaphore;
static int enter;
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadSetDefault(void)
{
if (numthreads == -1) // not set manually
{
numthreads = 1;
} //end if
qprintf("%i threads\n", numthreads);
} //end of the function ThreadSetDefault
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadLock(void)
{
if (!threaded)
{
Error("ThreadLock: !threaded");
return;
} //end if
pthread_mutex_lock(&my_mutex);
if (enter)
Error("Recursive ThreadLock\n");
enter = 1;
} //end of the function ThreadLock
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadUnlock(void)
{
if (!threaded)
{
Error("ThreadUnlock: !threaded");
return;
} //end if
if (!enter)
Error("ThreadUnlock without lock\n");
enter = 0;
pthread_mutex_unlock(&my_mutex);
} //end of the function ThreadUnlock
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadSetupLock(void)
{
Log_Print("pthread multi-threading\n");
threaded = true;
currentnumthreads = 0;
currentthreadid = 0;
} //end of the function ThreadInitLock
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadShutdownLock(void)
{
threaded = false;
} //end of the function ThreadShutdownLock
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadSetupSemaphore(void)
{
sem_init(&semaphore, 0, 0);
} //end of the function ThreadSetupSemaphore
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadShutdownSemaphore(void)
{
sem_destroy(&semaphore);
} //end of the function ThreadShutdownSemaphore
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadSemaphoreWait(void)
{
sem_wait(&semaphore);
} //end of the function ThreadSemaphoreWait
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void ThreadSemaphoreIncrease(int count)
{
int i;
for (i = 0; i < count; i++)
{
sem_post(&semaphore);
} //end for
} //end of the function ThreadSemaphoreIncrease
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void RunThreadsOn(int workcnt, qboolean showpacifier, void(*func)(int))
{
int i;
pthread_t work_threads[MAX_THREADS];
void *pthread_return;
int start, end;
Log_Print("pthread multi-threading\n");
start = I_FloatTime ();
dispatch = 0;
workcount = workcnt;
oldf = -1;
pacifier = showpacifier;
threaded = true;
if (numthreads < 1 || numthreads > MAX_THREADS) numthreads = 1;
if (pacifier)
setbuf (stdout, NULL);
for (i=0 ; i<numthreads ; i++)
{
if (pthread_create(&work_threads[i],
NULL,
(pthread_startroutine_t)func,
(void *)(uintptr_t)i) == -1) {
Error ("pthread_create failed");
}
}
for (i=0 ; i<numthreads ; i++)
{
if (pthread_join(work_threads[i], &pthread_return) == -1)
Error ("pthread_join failed");
}
threaded = false;
end = I_FloatTime ();
if (pacifier)
printf (" (%i)\n", end-start);
} //end of the function RunThreadsOn
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void AddThread(void (*func)(int))
{
thread_t *thread;
if (numthreads == 1)
{
if (currentnumthreads >= numthreads) return;
currentnumthreads++;
func(-1);
currentnumthreads--;
} //end if
else
{
ThreadLock();
if (currentnumthreads >= numthreads)
{
ThreadUnlock();
return;
} //end if
//allocate new thread
thread = GetMemory(sizeof(thread_t));
if (!thread) Error("can't allocate memory for thread\n");
//
thread->threadid = currentthreadid;
if (pthread_create(&thread->thread,
NULL,
(pthread_startroutine_t)func,
(void *)(uintptr_t)thread->threadid) == -1) {