src/mesa/pipe/p_inlines.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #ifndef P_INLINES_H
  29 #define P_INLINES_H
  30
  31 #include "p_context.h"
  32 #include "p_defines.h"
  33 #include "p_winsys.h"
  34
  35
  36 static INLINE void *
  37 pipe_surface_map(struct pipe_surface *surface)
  38 {
  39    return (char *)surface->winsys->buffer_map( surface->winsys, surface->buffer,
  40                                                PIPE_BUFFER_USAGE_CPU_WRITE |
  41                                                PIPE_BUFFER_USAGE_CPU_READ )
  42       + surface->offset;
  43 }
  44
  45 static INLINE void
  46 pipe_surface_unmap(struct pipe_surface *surface)
  47 {
  48    surface->winsys->buffer_unmap( surface->winsys, surface->buffer );
  49 }
  50
  51 /**
  52  * Set 'ptr' to point to 'surf' and update reference counting.
  53  * The old thing pointed to, if any, will be unreferenced first.
  54  * 'surf' may be NULL.
  55  */
  56 static INLINE void
  57 pipe_surface_reference(struct pipe_surface **ptr, struct pipe_surface *surf)
  58 {
  59    /* bump the refcount first */
  60    if (surf)
  61       surf->refcount++;
  62
  63    if (*ptr /* && --(*ptr)->refcount == 0 */) {
  64       struct pipe_winsys *winsys = (*ptr)->winsys;
  65       winsys->surface_release(winsys, ptr);
  66       assert(!*ptr);
  67    }
  68
  69    *ptr = surf;
  70 }
  71
  72
  73 /* XXX: thread safety issues!
  74  */
  75 static INLINE void
  76 pipe_buffer_reference(struct pipe_winsys *winsys,
  77                       struct pipe_buffer **ptr,
  78                       struct pipe_buffer *buf)
  79 {
  80    if (buf)
  81       buf->refcount++;
  82
  83    if (*ptr && --(*ptr)->refcount == 0)
  84       winsys->buffer_destroy( winsys, *ptr );
  85
  86    *ptr = buf;
  87 }
  88
  89
  90
  91 /**
  92  * \sa pipe_surface_reference
  93  */
  94 static INLINE void
  95 pipe_texture_reference(struct pipe_context *pipe, struct pipe_texture **ptr,
  96                        struct pipe_texture *pt)
  97 {
  98    assert(ptr);
  99
 100    if (pt)
 101       pt->refcount++;
 102
 103    if (*ptr) {
 104       pipe->texture_release(pipe, ptr);
 105       assert(!*ptr);
 106    }
 107
 108    *ptr = pt;
 109 }
 110
 111
 112 #endif /* P_INLINES_H */