1 files changed, 243 insertions, 0 deletions
diff --git a/src/wsbm_driver.c b/src/wsbm_driver.c
new file mode 100644
index 0000000..98f846d
--- /dev/null
+++ b/src/wsbm_driver.c
@@ -0,0 +1,243 @@
+/**************************************************************************
+ *
+ * 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