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_screen.h"
  34
  35
  36 #ifdef __cplusplus
  37 extern "C" {
  38 #endif
  39
  40
  41 /**
  42  * Set 'ptr' to point to 'surf' and update reference counting.
  43  * The old thing pointed to, if any, will be unreferenced first.
  44  * 'surf' may be NULL.
  45  */
  46 static INLINE void
  47 pipe_surface_reference(struct pipe_surface **ptr, struct pipe_surface *surf)
  48 {
  49    /* bump the refcount first */
  50    if (surf) {
  51       assert(surf->refcount);
  52       surf->refcount++;
  53    }
  54
  55    if (*ptr) {
  56       struct pipe_screen *screen;
  57       assert((*ptr)->refcount);
  58       assert((*ptr)->texture);
  59       screen = (*ptr)->texture->screen;
  60       screen->tex_surface_release( screen, ptr );
  61       assert(!*ptr);
  62    }
  63
  64    *ptr = surf;
  65 }
  66
  67
  68 /**
  69  * \sa pipe_surface_reference
  70  */
  71 static INLINE void
  72 pipe_texture_reference(struct pipe_texture **ptr,
  73                        struct pipe_texture *pt)
  74 {
  75    assert(ptr);
  76
  77    if (pt) {
  78       assert(pt->refcount);
  79       pt->refcount++;
  80    }
  81
  82    if (*ptr) {
  83       struct pipe_screen *screen = (*ptr)->screen;
  84       assert(screen);
  85       assert((*ptr)->refcount);
  86       screen->texture_release(screen, ptr);
  87
  88       assert(!*ptr);
  89    }
  90
  91    *ptr = pt;
  92 }
  93
  94
  95 static INLINE void
  96 pipe_texture_release(struct pipe_texture **ptr)
  97 {
  98    struct pipe_screen *screen;
  99    assert(ptr);
 100    screen = (*ptr)->screen;
 101    assert((*ptr)->refcount);
 102    screen->texture_release(screen, ptr);
 103    *ptr = NULL;
 104 }
 105
 106
 107 /**
 108  * Convenience wrappers for screen buffer functions.
 109  */
 110
 111 static INLINE struct pipe_buffer *
 112 pipe_buffer_create( struct pipe_screen *screen,
 113                     unsigned alignment, unsigned usage, unsigned size )
 114 {
 115    return screen->buffer_create(screen, alignment, usage, size);
 116 }
 117
 118 static INLINE struct pipe_buffer *
 119 pipe_user_buffer_create( struct pipe_screen *screen, void *ptr, unsigned size )
 120 {
 121    return screen->user_buffer_create(screen, ptr, size);
 122 }
 123
 124 static INLINE void *
 125 pipe_buffer_map(struct pipe_screen *screen,
 126                 struct pipe_buffer *buf,
 127                 unsigned usage)
 128 {
 129    return screen->buffer_map(screen, buf, usage);
 130 }
 131
 132 static INLINE void
 133 pipe_buffer_unmap(struct pipe_screen *screen,
 134                   struct pipe_buffer *buf)
 135 {
 136    screen->buffer_unmap(screen, buf);
 137 }
 138
 139 /* XXX: thread safety issues!
 140  */
 141 static INLINE void
 142 pipe_buffer_reference(struct pipe_screen *screen,
 143                       struct pipe_buffer **ptr,
 144                       struct pipe_buffer *buf)
 145 {
 146    if (buf) {
 147       assert(buf->refcount);
 148       buf->refcount++;
 149    }
 150
 151    if (*ptr) {
 152       assert((*ptr)->refcount);
 153       if(--(*ptr)->refcount == 0) {
 154          screen->buffer_destroy( screen, *ptr );
 155       }
 156    }
 157
 158    *ptr = buf;
 159 }
 160
 161
 162 #ifdef __cplusplus
 163 }
 164 #endif
 165
 166 #endif /* P_INLINES_H */