src/gallium/include/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 #ifdef __cplusplus
  37 extern "C" {
  38 #endif
  39
  40
  41 static INLINE void *
  42 pipe_surface_map(struct pipe_surface *surface)
  43 {
  44    return (char *)surface->winsys->buffer_map( surface->winsys, surface->buffer,
  45                                                PIPE_BUFFER_USAGE_CPU_WRITE |
  46                                                PIPE_BUFFER_USAGE_CPU_READ )
  47       + surface->offset;
  48 }
  49
  50 static INLINE void
  51 pipe_surface_unmap(struct pipe_surface *surface)
  52 {
  53    surface->winsys->buffer_unmap( surface->winsys, surface->buffer );
  54 }
  55
  56 /**
  57  * Set 'ptr' to point to 'surf' and update reference counting.
  58  * The old thing pointed to, if any, will be unreferenced first.
  59  * 'surf' may be NULL.
  60  */
  61 static INLINE void
  62 pipe_surface_reference(struct pipe_surface **ptr, struct pipe_surface *surf)
  63 {
  64    /* bump the refcount first */
  65    if (surf)
  66       surf->refcount++;
  67
  68    if (*ptr /* && --(*ptr)->refcount == 0 */) {
  69       struct pipe_winsys *winsys = (*ptr)->winsys;
  70       winsys->surface_release(winsys, ptr);
  71       assert(!*ptr);
  72    }
  73
  74    *ptr = surf;
  75 }
  76
  77
  78 /* XXX: thread safety issues!
  79  */
  80 static INLINE void
  81 pipe_buffer_reference(struct pipe_winsys *winsys,
  82                       struct pipe_buffer **ptr,
  83                       struct pipe_buffer *buf)
  84 {
  85    if (buf)
  86       buf->refcount++;
  87
  88    if (*ptr && --(*ptr)->refcount == 0)
  89       winsys->buffer_destroy( winsys, *ptr );
  90
  91    *ptr = buf;
  92 }
  93
  94
  95
  96 /**
  97  * \sa pipe_surface_reference
  98  */
  99 static INLINE void
 100 pipe_texture_reference(struct pipe_context *pipe, struct pipe_texture **ptr,
 101                        struct pipe_texture *pt)
 102 {
 103    assert(ptr);
 104
 105    if (pt)
 106       pt->refcount++;
 107
 108    if (*ptr) {
 109       pipe->texture_release(pipe, ptr);
 110       assert(!*ptr);
 111    }
 112
 113    *ptr = pt;
 114 }
 115
 116
 117 #ifdef __cplusplus
 118 }
 119 #endif
 120
 121 #endif /* P_INLINES_H */