src/gallium/state_trackers/nine/iunknown.h

   1 /*
   2  * Copyright 2011 Joakim Sindholt <opensource@zhasha.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  22
  23 #ifndef _NINE_IUNKNOWN_H_
  24 #define _NINE_IUNKNOWN_H_
  25
  26 #include "pipe/p_compiler.h"
  27
  28 #include "util/u_memory.h"
  29
  30 #include "guid.h"
  31 #include "nine_debug.h"
  32 #include "nine_quirk.h"
  33
  34 #include "d3d9.h"
  35
  36 struct Nine9;
  37 struct NineDevice9;
  38
  39 struct NineUnknown
  40 {
  41     /* pointer to vtable  */
  42     void *vtable;
  43
  44     int32_t refs; /* external reference count */
  45     int32_t bind; /* internal bind count */
  46     boolean forward; /* whether to forward references to the container */
  47
  48     struct NineUnknown *container; /* referenced if (refs | bind) */
  49     struct NineDevice9 *device;    /* referenced if (refs) */
  50
  51     const GUID **guids; /* for QueryInterface */
  52
  53     void (*dtor)(void *data); /* top-level dtor */
  54 };
  55 static inline struct NineUnknown *
  56 NineUnknown( void *data )
  57 {
  58     return (struct NineUnknown *)data;
  59 }
  60
  61 /* Use this instead of a shitload of arguments: */
  62 struct NineUnknownParams
  63 {
  64     void *vtable;
  65     const GUID **guids;
  66     void (*dtor)(void *data);
  67     struct NineUnknown *container;
  68     struct NineDevice9 *device;
  69 };
  70
  71 HRESULT
  72 NineUnknown_ctor( struct NineUnknown *This,
  73                   struct NineUnknownParams *pParams );
  74
  75 void
  76 NineUnknown_dtor( struct NineUnknown *This );
  77
  78 /*** Direct3D public methods ***/
  79
  80 HRESULT WINAPI
  81 NineUnknown_QueryInterface( struct NineUnknown *This,
  82                             REFIID riid,
  83                             void **ppvObject );
  84
  85 ULONG WINAPI
  86 NineUnknown_AddRef( struct NineUnknown *This );
  87
  88 ULONG WINAPI
  89 NineUnknown_Release( struct NineUnknown *This );
  90
  91 HRESULT WINAPI
  92 NineUnknown_GetDevice( struct NineUnknown *This,
  93                        IDirect3DDevice9 **ppDevice );
  94
  95 /*** Nine private methods ***/
  96
  97 static inline void
  98 NineUnknown_Destroy( struct NineUnknown *This )
  99 {
 100     assert(!(This->refs | This->bind));
 101     This->dtor(This);
 102 }
 103
 104 static inline UINT
 105 NineUnknown_Bind( struct NineUnknown *This )
 106 {
 107     UINT b = ++This->bind;
 108     assert(b);
 109     if (b == 1 && This->container) {
 110         if (This->container != NineUnknown(This->device))
 111             NineUnknown_Bind(This->container);
 112     }
 113     return b;
 114 }
 115
 116 static inline UINT
 117 NineUnknown_Unbind( struct NineUnknown *This )
 118 {
 119     UINT b = --This->bind;
 120     if (!b) {
 121         if (This->container) {
 122             if (This->container != NineUnknown(This->device))
 123                 NineUnknown_Unbind(This->container);
 124         } else
 125         if (This->refs == 0) {
 126             This->dtor(This);
 127         }
 128     }
 129     return b;
 130 }
 131
 132 static inline void
 133 NineUnknown_ConvertRefToBind( struct NineUnknown *This )
 134 {
 135     NineUnknown_Bind(This);
 136     NineUnknown_Release(This);
 137 }
 138
 139 /* Detach from container. */
 140 static inline void
 141 NineUnknown_Detach( struct NineUnknown *This )
 142 {
 143     assert(This->container && !This->forward);
 144     if (This->refs)
 145         NineUnknown_Unbind(This->container);
 146     if (This->bind)
 147         NineUnknown_Unbind(This->container);
 148     This->container = NULL;
 149     if (!(This->refs | This->bind))
 150         This->dtor(This);
 151 }
 152
 153 #endif /* _NINE_IUNKNOWN_H_ */