xref: /external/chromium_org/third_party/mesa/src/src/gallium/drivers/llvmpipe/lp_fence.h

/**************************************************************************
 *
 * Copyright 2009 VMware, Inc.
 * All Rights Reserved.
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 * "Software"), to deal in the Software without restriction, including
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 * permit persons to whom the Software is furnished to do so, subject to
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 *
 * 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.
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#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 */