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/**************************************************************************
*
* Copyright 2009 VMware, Inc.
* 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 VMWARE 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.
*
**************************************************************************/
#ifndef LP_FENCE_H
#define LP_FENCE_H
#include "os/os_thread.h"
#include "pipe/p_state.h"
#include "util/u_inlines.h"
struct pipe_screen;
struct lp_fence
{
struct pipe_reference reference;
unsigned id;
pipe_mutex mutex;
pipe_condvar signalled;
boolean issued;
unsigned rank;
unsigned count;
};
struct lp_fence *
lp_fence_create(unsigned rank);
void
lp_fence_signal(struct lp_fence *fence);
boolean
lp_fence_signalled(struct lp_fence *fence);
void
lp_fence_wait(struct lp_fence *fence);
void
llvmpipe_init_screen_fence_funcs(struct pipe_screen *screen);
void
lp_fence_destroy(struct lp_fence *fence);
static inline void
lp_fence_reference(struct lp_fence **ptr,
struct lp_fence *f)
{
struct lp_fence *old = *ptr;
if (pipe_reference(&old->reference, &f->reference)) {
lp_fence_destroy(old);
}
*ptr = f;
}
static inline boolean
lp_fence_issued(const struct lp_fence *fence)
{
return fence->issued;
}
#endif /* LP_FENCE_H */
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