thread_win.c File Reference

#include "quakedef.h"
#include "thread.h"
#include <process.h>

Include dependency graph for thread_win.c:

Go to the source code of this file.

Data Structures
struct	barrier_t
struct	thread_cond_t
struct	thread_semaphore_t
struct	threadwrapper_t

Functions
int	_Thread_CondBroadcast (void *cond, const char *filename, int fileline)
int	_Thread_CondSignal (void *cond, const char *filename, int fileline)
int	_Thread_CondWait (void *cond, void *mutex, const char *filename, int fileline)
void *	_Thread_CreateBarrier (unsigned int count, const char *filename, int fileline)
void *	_Thread_CreateCond (const char *filename, int fileline)
void *	_Thread_CreateMutex (const char *filename, int fileline)
void *	_Thread_CreateThread (int(*fn)(void *), void *data, const char *filename, int fileline)
void	_Thread_DestroyBarrier (void *barrier, const char *filename, int fileline)
void	_Thread_DestroyCond (void *cond, const char *filename, int fileline)
void	_Thread_DestroyMutex (void *mutex, const char *filename, int fileline)
int	_Thread_LockMutex (void *mutex, const char *filename, int fileline)
int	_Thread_UnlockMutex (void *mutex, const char *filename, int fileline)
void	_Thread_WaitBarrier (void *barrier, const char *filename, int fileline)
int	_Thread_WaitThread (void *d, int retval, const char *filename, int fileline)
static thread_semaphore_t *	Thread_CreateSemaphore (unsigned int v)
static void	Thread_DestroySemaphore (thread_semaphore_t *s)
qbool	Thread_HasThreads (void)
int	Thread_Init (void)
static int	Thread_PostSemaphore (thread_semaphore_t *s)
void	Thread_Shutdown (void)
static int	Thread_WaitSemaphore (thread_semaphore_t *s, unsigned int msec)
unsigned int __stdcall	Thread_WrapperFunc (void *d)

Function Documentation

_Thread_CondBroadcast()

int _Thread_CondBroadcast	(	void *	cond,
		const char *	filename,
		int	fileline )

Definition at line 157 of file thread_win.c.

{
    thread_cond_t *c = (thread_cond_t *)cond;
    int i = 0;
    int n = 0;
#ifdef THREADDEBUG
    Sys_Printf("%p cond broadcast %s:%i\n"   , cond, filename, fileline);
#endif
    WaitForSingleObject(c->mutex, INFINITE);
    n = c->waiting - c->signals;
    if (n > 0)
    {
        c->signals += n;
        for (i = 0;i < n;i++)
            Thread_PostSemaphore(c->sem);
    }
    ReleaseMutex(c->mutex);
    for (i = 0;i < n;i++)
        Thread_WaitSemaphore(c->done, INFINITE);
    return 0;
}

References thread_cond_t::done, i, thread_cond_t::mutex, n, thread_cond_t::sem, thread_cond_t::signals, Sys_Printf(), Thread_PostSemaphore(), Thread_WaitSemaphore(), and thread_cond_t::waiting.

_Thread_CondSignal()

int _Thread_CondSignal	(	void *	cond,
		const char *	filename,
		int	fileline )

Definition at line 137 of file thread_win.c.

{
    thread_cond_t *c = (thread_cond_t *)cond;
    int n;
#ifdef THREADDEBUG
    Sys_Printf("%p cond signal %s:%i\n"   , cond, filename, fileline);
#endif
    WaitForSingleObject(c->mutex, INFINITE);
    n = c->waiting - c->signals;
    if (n > 0)
    {
        c->signals++;
        Thread_PostSemaphore(c->sem);
    }
    ReleaseMutex(c->mutex);
    if (n > 0)
        Thread_WaitSemaphore(c->done, INFINITE);
    return 0;
}

References thread_cond_t::done, thread_cond_t::mutex, n, thread_cond_t::sem, thread_cond_t::signals, Sys_Printf(), Thread_PostSemaphore(), Thread_WaitSemaphore(), and thread_cond_t::waiting.

_Thread_CondWait()

int _Thread_CondWait	(	void *	cond,
		void *	mutex,
		const char *	filename,
		int	fileline )

Definition at line 179 of file thread_win.c.

{
    thread_cond_t *c = (thread_cond_t *)cond;
    int waitresult;
#ifdef THREADDEBUG
    Sys_Printf("%p cond wait %s:%i\n"   , cond, filename, fileline);
#endif
 
    WaitForSingleObject(c->mutex, INFINITE);
    c->waiting++;
    ReleaseMutex(c->mutex);
 
    ReleaseMutex(mutex);
 
    waitresult = Thread_WaitSemaphore(c->sem, INFINITE);
    WaitForSingleObject(c->mutex, INFINITE);
    if (c->signals > 0)
    {
        if (waitresult > 0)
            Thread_WaitSemaphore(c->sem, INFINITE);
        Thread_PostSemaphore(c->done);
        c->signals--;
    }
    c->waiting--;
    ReleaseMutex(c->mutex);
 
    WaitForSingleObject(mutex, INFINITE);
    return waitresult;
}

References thread_cond_t::done, thread_cond_t::mutex, thread_cond_t::sem, thread_cond_t::signals, Sys_Printf(), Thread_PostSemaphore(), Thread_WaitSemaphore(), and thread_cond_t::waiting.

_Thread_CreateBarrier()

void * _Thread_CreateBarrier	(	unsigned int	count,
		const char *	filename,
		int	fileline )

Definition at line 263 of file thread_win.c.

{
    volatile barrier_t *b = (volatile barrier_t *) Z_Malloc(sizeof(barrier_t));
#ifdef THREADDEBUG
    Sys_Printf("%p barrier create(%d) %s:%i\n", b, count, filename, fileline);
#endif
    b->needed = count;
    b->called = 0;
    b->mutex = Thread_CreateMutex();
    b->cond = Thread_CreateCond();
    return (void *) b;
}

References b, count, NULL, Sys_Printf(), Thread_CreateCond, Thread_CreateMutex, and Z_Malloc.

_Thread_CreateCond()

void * _Thread_CreateCond	(	const char *	filename,
		int	fileline )

Definition at line 112 of file thread_win.c.

{
    thread_cond_t *c = (thread_cond_t *)calloc(sizeof(*c), 1);
    c->mutex = CreateMutex(NULL, FALSE, NULL);
    c->sem = Thread_CreateSemaphore(0);
    c->done = Thread_CreateSemaphore(0);
    c->waiting = 0;
    c->signals = 0;
#ifdef THREADDEBUG
    Sys_Printf("%p cond create %s:%i\n"   , c, filename, fileline);
#endif
    return c;
}

References thread_cond_t::done, FALSE, thread_cond_t::mutex, NULL, thread_cond_t::sem, thread_cond_t::signals, Sys_Printf(), Thread_CreateSemaphore(), and thread_cond_t::waiting.

_Thread_CreateMutex()

void * _Thread_CreateMutex	(	const char *	filename,
		int	fileline )

Definition at line 26 of file thread_win.c.

{
    void *mutex = (void *)CreateMutex(NULL, FALSE, NULL);
#ifdef THREADDEBUG
    Sys_Printf("%p mutex create %s:%i\n" , mutex, filename, fileline);
#endif
    return mutex;
}

References FALSE, NULL, and Sys_Printf().

_Thread_CreateThread()

void * _Thread_CreateThread	(	int(*	fn )(void *),
		void *	data,
		const char *	filename,
		int	fileline )

Definition at line 227 of file thread_win.c.

{
    threadwrapper_t *w = (threadwrapper_t *)calloc(sizeof(*w), 1);
#ifdef THREADDEBUG
    Sys_Printf("%p thread create %s:%i\n"   , w, filename, fileline);
#endif
    w->fn = fn;
    w->data = data;
    w->threadid = 0;
    w->result = 0;
    w->handle = (HANDLE)_beginthreadex(NULL, 0, Thread_WrapperFunc, (void *)w, 0, &w->threadid);
    return (void *)w;
}

References data, NULL, Sys_Printf(), Thread_WrapperFunc(), and w.

_Thread_DestroyBarrier()

void _Thread_DestroyBarrier	(	void *	barrier,
		const char *	filename,
		int	fileline )

Definition at line 276 of file thread_win.c.

{
    volatile barrier_t *b = (volatile barrier_t *) barrier;
#ifdef THREADDEBUG
    Sys_Printf("%p barrier destroy %s:%i\n", b, filename, fileline);
#endif
    Thread_DestroyMutex(b->mutex);
    Thread_DestroyCond(b->cond);
}

References b, Sys_Printf(), Thread_DestroyCond, and Thread_DestroyMutex.

_Thread_DestroyCond()

void _Thread_DestroyCond	(	void *	cond,
		const char *	filename,
		int	fileline )

Definition at line 126 of file thread_win.c.

{
    thread_cond_t *c = (thread_cond_t *)cond;
#ifdef THREADDEBUG
    Sys_Printf("%p cond destroy %s:%i\n"   , cond, filename, fileline);
#endif
    Thread_DestroySemaphore(c->sem);
    Thread_DestroySemaphore(c->done);
    CloseHandle(c->mutex);
}

References thread_cond_t::done, thread_cond_t::mutex, thread_cond_t::sem, Sys_Printf(), and Thread_DestroySemaphore().

_Thread_DestroyMutex()

void _Thread_DestroyMutex	(	void *	mutex,
		const char *	filename,
		int	fileline )

Definition at line 35 of file thread_win.c.

{
#ifdef THREADDEBUG
    Sys_Printf("%p mutex destroy %s:%i\n", mutex, filename, fileline);
#endif
    CloseHandle(mutex);
}

References Sys_Printf().

_Thread_LockMutex()

int _Thread_LockMutex	(	void *	mutex,
		const char *	filename,
		int	fileline )

Definition at line 43 of file thread_win.c.

{
#ifdef THREADDEBUG
    Sys_Printf("%p mutex lock %s:%i\n"   , mutex, filename, fileline);
#endif
    return (WaitForSingleObject(mutex, INFINITE) == WAIT_FAILED) ? -1 : 0;
}

References Sys_Printf().

_Thread_UnlockMutex()

int _Thread_UnlockMutex	(	void *	mutex,
		const char *	filename,
		int	fileline )

Definition at line 51 of file thread_win.c.

{
#ifdef THREADDEBUG
    Sys_Printf("%p mutex unlock %s:%i\n" , mutex, filename, fileline);
#endif
    return (ReleaseMutex(mutex) == false) ? -1 : 0;
}

References Sys_Printf().

_Thread_WaitBarrier()

void _Thread_WaitBarrier	(	void *	barrier,
		const char *	filename,
		int	fileline )

Definition at line 286 of file thread_win.c.

{
    volatile barrier_t *b = (volatile barrier_t *) barrier;
#ifdef THREADDEBUG
    Sys_Printf("%p barrier wait %s:%i\n", b, filename, fileline);
#endif
    Thread_LockMutex(b->mutex);
    b->called++;
    if (b->called == b->needed) {
        b->called = 0;
        Thread_CondBroadcast(b->cond);
    } else {
        do {
            Thread_CondWait(b->cond, b->mutex);
        } while(b->called);
    }
    Thread_UnlockMutex(b->mutex);
}

References b, Sys_Printf(), Thread_CondBroadcast, Thread_CondWait, Thread_LockMutex, and Thread_UnlockMutex.

_Thread_WaitThread()

int _Thread_WaitThread	(	void *	d,
		int	retval,
		const char *	filename,
		int	fileline )

Definition at line 241 of file thread_win.c.

{
    threadwrapper_t *w = (threadwrapper_t *)d;
#ifdef THREADDEBUG
    Sys_Printf("%p thread wait %s:%i\n"   , w, filename, fileline);
#endif
    WaitForSingleObject(w->handle, INFINITE);
    CloseHandle(w->handle);
    retval = w->result;
    free(w);
    return retval;
}

References Sys_Printf(), and w.

Thread_CreateSemaphore()

static thread_semaphore_t * Thread_CreateSemaphore ( unsigned int v )

static

Definition at line 66 of file thread_win.c.

{
    thread_semaphore_t *s = (thread_semaphore_t *)calloc(sizeof(*s), 1);
    s->semaphore = CreateSemaphore(NULL, v, 32768, NULL);
    s->value = v;
    return s;
}

References NULL, thread_semaphore_t::semaphore, v, and thread_semaphore_t::value.

Referenced by _Thread_CreateCond().

Thread_DestroySemaphore()

static void Thread_DestroySemaphore ( thread_semaphore_t * s )

static

Definition at line 74 of file thread_win.c.

{
    CloseHandle(s->semaphore);
    free(s);
}

References thread_semaphore_t::semaphore.

Referenced by _Thread_DestroyCond().

Thread_HasThreads()

qbool Thread_HasThreads

(

void

)

Definition at line 17 of file thread_win.c.

{
#ifdef THREADDISABLE
    return false;
#else
    return true;
#endif
}

Referenced by Con_Init(), Crypto_Init(), Curl_Init(), FS_Init_Dir(), Memory_Init(), NetConn_Init(), and SV_StartThread().

Thread_Init()

int Thread_Init

(

void

)

Definition at line 5 of file thread_win.c.

{
#ifdef THREADDISABLE
    Con_Printf("Threading disabled in this build\n");
#endif
    return 0;
}

References Con_Printf().

Referenced by Host_Init().

Thread_PostSemaphore()

static int Thread_PostSemaphore ( thread_semaphore_t * s )

static

Definition at line 93 of file thread_win.c.

{
    InterlockedIncrement(&s->value);
    if (ReleaseSemaphore(s->semaphore, 1, NULL))
        return 0;
    InterlockedDecrement(&s->value);
    return -1;
}

References NULL, thread_semaphore_t::semaphore, and thread_semaphore_t::value.

Referenced by _Thread_CondBroadcast(), _Thread_CondSignal(), and _Thread_CondWait().

Thread_Shutdown()

void Thread_Shutdown

(

void

)

Definition at line 13 of file thread_win.c.

{
}

Referenced by Host_Shutdown().

Thread_WaitSemaphore()

static int Thread_WaitSemaphore ( thread_semaphore_t * s, unsigned int msec )

static

Definition at line 80 of file thread_win.c.

{
    int r = WaitForSingleObject(s->semaphore, msec);
    if (r == WAIT_OBJECT_0)
    {
        InterlockedDecrement(&s->value);
        return 0;
    }
    if (r == WAIT_TIMEOUT)
        return 1;
    return -1;
}

References r, thread_semaphore_t::semaphore, and thread_semaphore_t::value.

Referenced by _Thread_CondBroadcast(), _Thread_CondSignal(), and _Thread_CondWait().

Thread_WrapperFunc()

unsigned int __stdcall Thread_WrapperFunc

(

void *

d

)

Definition at line 219 of file thread_win.c.

{
    threadwrapper_t *w = (threadwrapper_t *)d;
    w->result = w->fn(w->data);
    _endthreadex(w->result);
    return w->result;
}

References threadwrapper_t::result, and w.

Referenced by _Thread_CreateThread().