| /************************************************************************** |
| * |
| * 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 __attribute__ ((unused))) |
| { |
| ; |
| } |
| |
| static void |
| n_condNone(struct _WsbmCond *cond __attribute__ ((unused))) |
| { |
| ; |
| } |
| |
| static void |
| n_condWait(struct _WsbmCond *cond __attribute__ ((unused)), struct _WsbmMutex *mutex __attribute__ ((unused))) |
| { |
| ; |
| } |
| |
| 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 |