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Diffstat (limited to 'src/mesa/pipe/pipebuffer/pb_buffer_fenced.c')
-rw-r--r--src/mesa/pipe/pipebuffer/pb_buffer_fenced.c316
1 files changed, 316 insertions, 0 deletions
diff --git a/src/mesa/pipe/pipebuffer/pb_buffer_fenced.c b/src/mesa/pipe/pipebuffer/pb_buffer_fenced.c
new file mode 100644
index 0000000000..e69f88a323
--- /dev/null
+++ b/src/mesa/pipe/pipebuffer/pb_buffer_fenced.c
@@ -0,0 +1,316 @@
+/**************************************************************************
+ *
+ * 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 José Fonseca <jrfonseca-at-tungstengraphics-dot-com>
+ * \author Thomas Hellström <thomas-at-tungstengraphics-dot-com>
+ */
+
+
+#include <assert.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "main/imports.h"
+#include "glapi/glthread.h"
+#include "linked_list.h"
+
+#include "p_winsys.h"
+
+#include "pb_buffer.h"
+#include "pb_buffer_fenced.h"
+
+
+/**
+ * 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 pipe_buffer base;
+
+ struct pipe_buffer *buffer;
+
+ unsigned refcount;
+ struct pipe_fence_handle *fence;
+
+ struct list_head head;
+ struct fenced_buffer_list *list;
+};
+
+
+static inline struct fenced_buffer *
+fenced_buffer(struct pipe_buffer *buf)
+{
+ assert(buf);
+ assert(buf->vtbl == &fenced_buffer_vtbl);
+ return (struct fenced_buffer *)buf;
+}
+
+
+static void
+_fenced_buffer_destroy(struct fenced_buffer *fenced_buf)
+{
+ buffer_release(fenced_buf->buffer);
+ free(fenced_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;
+ int i;
+
+ list = fenced_list->delayed.next;
+
+ if (fenced_list->numDelayed > 3) {
+ 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--;
+
+ _fenced_buffer_destroy(fenced_buf);
+ }
+}
+
+
+static void
+fenced_buffer_reference(struct pipe_buffer *buf)
+{
+ struct fenced_buffer *fenced_buf = fenced_buffer(buf);
+ struct fenced_buffer_list *fenced_list = fenced_buf->list;
+
+ _glthread_LOCK_MUTEX(fenced_list->mutex);
+ fenced_buf->refcount++;
+ _glthread_UNLOCK_MUTEX(fenced_list->mutex);
+}
+
+
+static void
+fenced_buffer_release(struct pipe_buffer *buf)
+{
+ struct fenced_buffer *fenced_buf = fenced_buffer(buf);
+ struct fenced_buffer_list *fenced_list = fenced_buf->list;
+
+ _glthread_LOCK_MUTEX(fenced_list->mutex);
+
+ fenced_buf->refcount--;
+ if(!fenced_buf->refcount) {
+ if (fenced_buf->fence) {
+ LIST_ADDTAIL(&fenced_buf->head, &fenced_list->delayed);
+ fenced_list->numDelayed++;
+ }
+ else {
+ _fenced_buffer_destroy(fenced_buf);
+ }
+
+ if ((fenced_list->numDelayed % fenced_list->checkDelayed) == 0)
+ _fenced_buffer_list_check_free(fenced_list, 0);
+ }
+
+ _glthread_UNLOCK_MUTEX(fenced_list->mutex);
+}
+
+
+static void *
+fenced_buffer_map(struct pipe_buffer *buf,
+ unsigned flags)
+{
+ struct fenced_buffer *fenced_buf = fenced_buffer(buf);
+ return buffer_map(fenced_buf->buffer, flags);
+}
+
+
+static void
+fenced_buffer_unmap(struct pipe_buffer *buf)
+{
+ struct fenced_buffer *fenced_buf = fenced_buffer(buf);
+ buffer_unmap(fenced_buf->buffer);
+}
+
+
+static void
+fenced_buffer_get_base_buffer(struct pipe_buffer *buf,
+ struct pipe_buffer **base_buf,
+ unsigned *offset)
+{
+ struct fenced_buffer *fenced_buf = fenced_buffer(buf);
+ buffer_get_base_buffer(fenced_buf->buffer, base_buf, offset);
+}
+
+
+const struct pipe_buffer_vtbl
+fenced_buffer_vtbl = {
+ fenced_buffer_reference,
+ fenced_buffer_release,
+ fenced_buffer_map,
+ fenced_buffer_unmap,
+ fenced_buffer_get_base_buffer
+};
+
+
+struct pipe_buffer *
+fenced_buffer_create(struct fenced_buffer_list *fenced_list,
+ struct pipe_buffer *buffer)
+{
+ struct fenced_buffer *buf;
+
+ buf = (struct fenced_buffer *)calloc(1, sizeof(struct fenced_buffer));
+ if(!buf)
+ return NULL;
+
+ buf->base.vtbl = &fenced_buffer_vtbl;
+ buf->buffer = buffer;
+ buf->refcount = 1;
+ buf->list = fenced_list;
+
+ return &buf->base;
+}
+
+
+void
+buffer_fence(struct pipe_buffer *buf,
+ struct pipe_fence_handle *fence)
+{
+ if(buf->vtbl == &fenced_buffer_vtbl) {
+ 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);
+ }
+ else
+ assert(0);
+}
+
+
+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, GL_TRUE);
+ _glthread_LOCK_MUTEX(fenced_list->mutex);
+ }
+
+ _glthread_UNLOCK_MUTEX(fenced_list->mutex);
+
+ free(fenced_list);
+}
+
+
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