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/****************************************************************************
* Copyright (C) 2015 Intel Corporation. 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, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
***************************************************************************/
#include "pipe/p_screen.h"
#include "util/u_memory.h"
#include "os/os_time.h"
#include "swr_context.h"
#include "swr_screen.h"
#include "swr_fence.h"
#if defined(PIPE_CC_MSVC) // portable thread yield
#define sched_yield SwitchToThread
#endif
/*
* Fence callback, called by back-end thread on completion of all rendering up
* to SwrSync call.
*/
static void
swr_sync_cb(UINT64 userData, UINT64 userData2, UINT64 userData3)
{
struct swr_fence *fence = (struct swr_fence *)userData;
fence->read = fence->write;
}
/*
* Submit an existing fence.
*/
void
swr_fence_submit(struct swr_context *ctx, struct pipe_fence_handle *fh)
{
struct swr_fence *fence = swr_fence(fh);
fence->write++;
SwrSync(ctx->swrContext, swr_sync_cb, (UINT64)fence, 0, 0);
}
/*
* Create a new fence object.
*/
struct pipe_fence_handle *
swr_fence_create()
{
static int fence_id = 0;
struct swr_fence *fence = CALLOC_STRUCT(swr_fence);
if (!fence)
return NULL;
memset(fence, 0, sizeof(*fence));
pipe_reference_init(&fence->reference, 1);
fence->id = fence_id++;
return (struct pipe_fence_handle *)fence;
}
/** Destroy a fence. Called when refcount hits zero. */
static void
swr_fence_destroy(struct swr_fence *fence)
{
FREE(fence);
}
/**
* Set ptr = fence, with reference counting
*/
void
swr_fence_reference(struct pipe_screen *screen,
struct pipe_fence_handle **ptr,
struct pipe_fence_handle *f)
{
struct swr_fence *fence = swr_fence(f);
struct swr_fence *old;
if (likely(ptr)) {
old = swr_fence(*ptr);
*ptr = f;
} else {
old = NULL;
}
if (pipe_reference(&old->reference, &fence->reference))
swr_fence_destroy(old);
}
/*
* Wait for the fence to finish.
*/
boolean
swr_fence_finish(struct pipe_screen *screen,
struct pipe_fence_handle *fence_handle,
uint64_t timeout)
{
struct swr_fence *fence = swr_fence(fence_handle);
while (!swr_is_fence_done(fence))
sched_yield();
return TRUE;
}
uint64_t
swr_get_timestamp(struct pipe_screen *screen)
{
return os_time_get_nano();
}
void
swr_fence_init(struct pipe_screen *p_screen)
{
p_screen->fence_reference = swr_fence_reference;
p_screen->fence_finish = swr_fence_finish;
p_screen->get_timestamp = swr_get_timestamp;
/*
* Create persistant "flush" fence, submitted when swr_flush is called.
*/
struct swr_screen *screen = swr_screen(p_screen);
screen->flush_fence = swr_fence_create();
}
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