1 files changed, 299 insertions, 0 deletions
diff --git a/src/gallium/aux/pipebuffer/pb_buffer_fenced.c b/src/gallium/aux/pipebuffer/pb_buffer_fenced.c
new file mode 100644
index 00000000000..f4fc3f6d714
--- /dev/null
+++ b/src/gallium/aux/pipebuffer/pb_buffer_fenced.c
@@ -0,0 +1,299 @@
+/**************************************************************************
+ *
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 TUNGSTEN GRAPHICS 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.
+ *
+ **************************************************************************/
+
+/**
+ * \file
+ * Implementation of fenced buffers.
+ * 
+ * \author Jos� Fonseca <jrfonseca-at-tungstengraphics-dot-com>
+ * \author Thomas Hellstr�m <thomas-at-tungstengraphics-dot-com>
+ */
+
+
+#include "linked_list.h"
+
+#include "p_compiler.h"
+#include "p_debug.h"
+#include "p_winsys.h"
+#include "p_thread.h"
+#include "p_util.h"
+
+#include "pb_buffer.h"
+#include "pb_buffer_fenced.h"
+
+#ifndef __MSC__
+#include <unistd.h>
+#endif
+
+
+/**
+ * Convenience macro (type safe).
+ */
+#define SUPER(__derived) (&(__derived)->base)
+
+
+struct fenced_buffer_list
+{
+   _glthread_Mutex mutex;
+   
+   struct pipe_winsys *winsys;
+   
+   size_t numDelayed;
+   size_t checkDelayed;
+   
+   struct list_head delayed;
+};
+
+
+/**
+ * Wrapper around a pipe buffer which adds fencing and reference counting.
+ */
+struct fenced_buffer
+{
+   struct pb_buffer base;
+   
+   struct pb_buffer *buffer;
+
+   struct pipe_fence_handle *fence;
+
+   struct list_head head;
+   struct fenced_buffer_list *list;
+};
+
+
+static INLINE struct fenced_buffer *
+fenced_buffer(struct pb_buffer *buf)
+{
+   assert(buf);
+   assert(buf->vtbl == &fenced_buffer_vtbl);
+   return (struct fenced_buffer *)buf;
+}
+
+
+
+
+static void
+_fenced_buffer_list_check_free(struct fenced_buffer_list *fenced_list, 
+                               int wait)
+{
+   struct pipe_winsys *winsys = fenced_list->winsys;
+   struct fenced_buffer *fenced_buf;   
+   struct list_head *list, *prev;
+   int signaled = -1;
+
+   list = fenced_list->delayed.next;
+
+   if (fenced_list->numDelayed > 3) {
+      unsigned i;
+
+      for (i = 0; i < fenced_list->numDelayed; i += 3) {
+         list = list->next;
+      }
+   }
+
+   prev = list->prev;
+   for (; list != &fenced_list->delayed; list = prev, prev = list->prev) {
+
+      fenced_buf = LIST_ENTRY(struct fenced_buffer, list, head);
+
+      if (signaled != 0) {
+         if (wait) {
+            signaled = winsys->fence_finish(winsys, fenced_buf->fence, 0);
+         }
+         else {
+            signaled = winsys->fence_signalled(winsys, fenced_buf->fence, 0);
+         }
+      }
+
+      if (signaled != 0)
+	 /* XXX: we are assuming that buffers are freed in the same order they 
+	  * are fenced which may not always be true... 
+	  */
+         break;
+
+      winsys->fence_reference(winsys, &fenced_buf->fence, NULL);
+      
+      LIST_DEL(list);
+      fenced_list->numDelayed--;
+
+      /* Do the delayed destroy:
+       */
+      pb_reference(&fenced_buf->buffer, NULL);
+      FREE(fenced_buf);
+   }
+}
+
+
+static void
+fenced_buffer_destroy(struct pb_buffer *buf)
+{
+   struct fenced_buffer *fenced_buf = fenced_buffer(buf);   
+   struct fenced_buffer_list *fenced_list = fenced_buf->list;
+
+   if (fenced_buf->fence) {
+      LIST_ADDTAIL(&fenced_buf->head, &fenced_list->delayed);
+      fenced_list->numDelayed++;
+   }
+   else {
+      pb_reference(&fenced_buf->buffer, NULL);
+      FREE(fenced_buf);
+   }
+   
+   if ((fenced_list->numDelayed % fenced_list->checkDelayed) == 0)
+      _fenced_buffer_list_check_free(fenced_list, 0);
+}
+
+
+static void *
+fenced_buffer_map(struct pb_buffer *buf, 
+                  unsigned flags)
+{
+   struct fenced_buffer *fenced_buf = fenced_buffer(buf);   
+   return pb_map(fenced_buf->buffer, flags);
+}
+
+
+static void
+fenced_buffer_unmap(struct pb_buffer *buf)
+{
+   struct fenced_buffer *fenced_buf = fenced_buffer(buf);   
+   pb_unmap(fenced_buf->buffer);
+}
+
+
+static void
+fenced_buffer_get_base_buffer(struct pb_buffer *buf,
+                              struct pb_buffer **base_buf,
+                              unsigned *offset)
+{
+   struct fenced_buffer *fenced_buf = fenced_buffer(buf);
+   pb_get_base_buffer(fenced_buf->buffer, base_buf, offset);
+}
+
+
+const struct pb_vtbl 
+fenced_buffer_vtbl = {
+      fenced_buffer_destroy,
+      fenced_buffer_map,
+      fenced_buffer_unmap,
+      fenced_buffer_get_base_buffer
+};
+
+
+struct pb_buffer *
+fenced_buffer_create(struct fenced_buffer_list *fenced_list, 
+                     struct pb_buffer *buffer)
+{
+   struct fenced_buffer *buf;
+   
+   if(!buffer)
+      return NULL;
+   
+   buf = CALLOC_STRUCT(fenced_buffer);
+   if(!buf)
+      return NULL;
+   
+   buf->base.base.refcount = 1;
+   buf->base.base.alignment = buffer->base.alignment;
+   buf->base.base.usage = buffer->base.usage;
+   buf->base.base.size = buffer->base.size;
+   
+   buf->base.vtbl = &fenced_buffer_vtbl;
+   buf->buffer = buffer;
+   buf->list = fenced_list;
+   
+   return &buf->base;
+}
+
+
+void
+buffer_fence(struct pb_buffer *buf,
+             struct pipe_fence_handle *fence)
+{
+   struct fenced_buffer *fenced_buf = fenced_buffer(buf);
+   struct fenced_buffer_list *fenced_list = fenced_buf->list;
+   struct pipe_winsys *winsys = fenced_list->winsys;
+   
+   _glthread_LOCK_MUTEX(fenced_list->mutex);
+   winsys->fence_reference(winsys, &fenced_buf->fence, fence);
+   _glthread_UNLOCK_MUTEX(fenced_list->mutex);
+}
+
+
+struct fenced_buffer_list *
+fenced_buffer_list_create(struct pipe_winsys *winsys) 
+{
+   struct fenced_buffer_list *fenced_list;
+
+   fenced_list = (struct fenced_buffer_list *)CALLOC(1, sizeof(*fenced_list));
+   if (!fenced_list)
+      return NULL;
+
+   fenced_list->winsys = winsys;
+
+   LIST_INITHEAD(&fenced_list->delayed);
+
+   fenced_list->numDelayed = 0;
+   
+   /* TODO: don't hard code this */ 
+   fenced_list->checkDelayed = 5;
+
+   _glthread_INIT_MUTEX(fenced_list->mutex);
+
+   return fenced_list;
+}
+
+
+void
+fenced_buffer_list_check_free(struct fenced_buffer_list *fenced_list, 
+                              int wait)
+{
+   _glthread_LOCK_MUTEX(fenced_list->mutex);
+   _fenced_buffer_list_check_free(fenced_list, wait);
+   _glthread_UNLOCK_MUTEX(fenced_list->mutex);
+}
+
+
+void
+fenced_buffer_list_destroy(struct fenced_buffer_list *fenced_list)
+{
+   _glthread_LOCK_MUTEX(fenced_list->mutex);
+
+   /* Wait on outstanding fences */
+   while (fenced_list->numDelayed) {
+      _glthread_UNLOCK_MUTEX(fenced_list->mutex);
+      sched_yield();
+      _fenced_buffer_list_check_free(fenced_list, 1);
+      _glthread_LOCK_MUTEX(fenced_list->mutex);
+   }
+
+   _glthread_UNLOCK_MUTEX(fenced_list->mutex);
+   
+   FREE(fenced_list);
+}
+
+