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/**************************************************************************
*
* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, TX., USA
* All Rights Reserved.
* Copyright 2009 VMware, Inc., Palo Alto, CA., USA
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/*
* Authors:
* Thomas Hellström <thomas-at-tungstengraphics-dot-com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <stddef.h>
#include <errno.h>
#include "wsbm_driver.h"
struct _WsbmThreadFuncs *wsbmCurThreadFunc = NULL;
struct _WsbmVNodeFuncs *wsbmCurVNodeFunc = NULL;
/*
* Single-threaded implementation.
*/
static int
n_mutexInit(struct _WsbmMutex *mutex, struct _WsbmThreadFuncs *func)
{
mutex->func = func;
return 0;
}
static int
n_condInit(struct _WsbmCond *cond, struct _WsbmThreadFuncs *func)
{
cond->func = func;
return 0;
}
static void
n_mutexNone(struct _WsbmMutex *mutex)
{
;
}
static void
n_condNone(struct _WsbmCond *cond)
{
;
}
static void
n_condWait(struct _WsbmCond *cond, struct _WsbmMutex *mutex)
{
;
}
static struct _WsbmThreadFuncs nullFunc = {
.mutexInit = n_mutexInit,
.mutexFree = n_mutexNone,
.mutexLock = n_mutexNone,
.mutexUnlock = n_mutexNone,
.condInit = n_condInit,
.condFree = n_condNone,
.condWait = n_condWait,
.condBroadcast = n_condNone
};
struct _WsbmThreadFuncs *
wsbmNullThreadFuncs(void)
{
return &nullFunc;
}
#if (HAVE_PTHREADS == 1)
#include "pthread.h"
/*
* pthreads implementation:
*/
struct _WsbmPMutex
{
struct _WsbmThreadFuncs *func;
pthread_mutex_t mutex;
};
struct _WsbmPCond
{
struct _WsbmThreadFuncs *func;
pthread_cond_t cond;
};
static inline struct _WsbmPMutex *
pMutexConvert(struct _WsbmMutex *m)
{
union _PMutexConverter
{
struct _WsbmMutex wm;
struct _WsbmPMutex pm;
} *um = containerOf(m, union _PMutexConverter, wm);
return &um->pm;
}
static inline struct _WsbmPCond *
pCondConvert(struct _WsbmCond *c)
{
union _PCondConverter
{
struct _WsbmCond wc;
struct _WsbmPCond pc;
} *uc = containerOf(c, union _PCondConverter, wc);
return &uc->pc;
}
static int
p_mutexInit(struct _WsbmMutex *mutex, struct _WsbmThreadFuncs *func)
{
struct _WsbmPMutex *pMutex = pMutexConvert(mutex);
if (sizeof(struct _WsbmMutex) < sizeof(struct _WsbmPMutex))
return -EINVAL;
pMutex->func = func;
pthread_mutex_init(&pMutex->mutex, NULL);
return 0;
}
static void
p_mutexFree(struct _WsbmMutex *mutex)
{
struct _WsbmPMutex *pMutex = pMutexConvert(mutex);
pthread_mutex_destroy(&pMutex->mutex);
}
static void
p_mutexLock(struct _WsbmMutex *mutex)
{
struct _WsbmPMutex *pMutex = pMutexConvert(mutex);
pthread_mutex_lock(&pMutex->mutex);
}
static void
p_mutexUnlock(struct _WsbmMutex *mutex)
{
struct _WsbmPMutex *pMutex = pMutexConvert(mutex);
pthread_mutex_unlock(&pMutex->mutex);
}
static int
p_condInit(struct _WsbmCond *cond, struct _WsbmThreadFuncs *func)
{
struct _WsbmPCond *pCond = pCondConvert(cond);
if (sizeof(struct _WsbmCond) < sizeof(struct _WsbmPCond))
return -EINVAL;
pCond->func = func;
pthread_cond_init(&pCond->cond, NULL);
return 0;
}
static void
p_condFree(struct _WsbmCond *cond)
{
struct _WsbmPCond *pCond = pCondConvert(cond);
pthread_cond_destroy(&pCond->cond);
}
static void
p_condBroadcast(struct _WsbmCond *cond)
{
struct _WsbmPCond *pCond = pCondConvert(cond);
pthread_cond_broadcast(&pCond->cond);
}
static void
p_condWait(struct _WsbmCond *cond, struct _WsbmMutex *mutex)
{
struct _WsbmPCond *pCond = pCondConvert(cond);
struct _WsbmPMutex *pMutex = pMutexConvert(mutex);
pthread_cond_wait(&pCond->cond, &pMutex->mutex);
}
static struct _WsbmThreadFuncs pthreadFunc = {
.mutexInit = p_mutexInit,
.mutexFree = p_mutexFree,
.mutexLock = p_mutexLock,
.mutexUnlock = p_mutexUnlock,
.condInit = p_condInit,
.condFree = p_condFree,
.condWait = p_condWait,
.condBroadcast = p_condBroadcast
};
struct _WsbmThreadFuncs *
wsbmPThreadFuncs(void)
{
return &pthreadFunc;
}
#else
#warning Pthreads is not present. Compiling without.
struct _WsbmThreadFuncs *
wsbmPThreadFuncs(void)
{
return &pthreadFunc;
}
#endif
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