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_flags.h"
  32 #include "nine_debug.h"
  33 #include "nine_quirk.h"
  34
  35 #include "d3d9.h"
  36
  37 struct Nine9;
  38 struct NineDevice9;
  39
  40 struct NineUnknown
  41 {
  42     /* pointer to vtable (can be overriden outside gallium nine) */
  43     void *vtable;
  44     /* pointer to internal vtable  */
  45     void *vtable_internal;
  46
  47     int32_t refs; /* external reference count */
  48     int32_t bind; /* internal bind count */
  49     boolean forward; /* whether to forward references to the container */
  50
  51     struct NineUnknown *container; /* referenced if (refs | bind) */
  52     struct NineDevice9 *device;    /* referenced if (refs) */
  53
  54     const GUID **guids; /* for QueryInterface */
  55
  56     void (*dtor)(void *data); /* top-level dtor */
  57 };
  58 static inline struct NineUnknown *
  59 NineUnknown( void *data )
  60 {
  61     return (struct NineUnknown *)data;
  62 }
  63
  64 /* Use this instead of a shitload of arguments: */
  65 struct NineUnknownParams
  66 {
  67     void *vtable;
  68     const GUID **guids;
  69     void (*dtor)(void *data);
  70     struct NineUnknown *container;
  71     struct NineDevice9 *device;
  72 };
  73
  74 HRESULT
  75 NineUnknown_ctor( struct NineUnknown *This,
  76                   struct NineUnknownParams *pParams );
  77
  78 void
  79 NineUnknown_dtor( struct NineUnknown *This );
  80
  81 /*** Direct3D public methods ***/
  82
  83 HRESULT NINE_WINAPI
  84 NineUnknown_QueryInterface( struct NineUnknown *This,
  85                             REFIID riid,
  86                             void **ppvObject );
  87
  88 ULONG NINE_WINAPI
  89 NineUnknown_AddRef( struct NineUnknown *This );
  90
  91 ULONG NINE_WINAPI
  92 NineUnknown_Release( struct NineUnknown *This );
  93
  94 HRESULT NINE_WINAPI
  95 NineUnknown_GetDevice( struct NineUnknown *This,
  96                        IDirect3DDevice9 **ppDevice );
  97
  98 /*** Nine private methods ***/
  99
 100 static inline void
 101 NineUnknown_Destroy( struct NineUnknown *This )
 102 {
 103     assert(!(This->refs | This->bind));
 104     This->dtor(This);
 105 }
 106
 107 static inline UINT
 108 NineUnknown_Bind( struct NineUnknown *This )
 109 {
 110     UINT b = ++This->bind;
 111     assert(b);
 112     if (b == 1 && This->container) {
 113         if (This->container != NineUnknown(This->device))
 114             NineUnknown_Bind(This->container);
 115     }
 116     return b;
 117 }
 118
 119 static inline UINT
 120 NineUnknown_Unbind( struct NineUnknown *This )
 121 {
 122     UINT b = --This->bind;
 123     if (!b) {
 124         if (This->container) {
 125             if (This->container != NineUnknown(This->device))
 126                 NineUnknown_Unbind(This->container);
 127         } else
 128         if (This->refs == 0) {
 129             This->dtor(This);
 130         }
 131     }
 132     return b;
 133 }
 134
 135 static inline void
 136 NineUnknown_ConvertRefToBind( struct NineUnknown *This )
 137 {
 138     NineUnknown_Bind(This);
 139     NineUnknown_Release(This);
 140 }
 141
 142 /* Detach from container. */
 143 static inline void
 144 NineUnknown_Detach( struct NineUnknown *This )
 145 {
 146     assert(This->container && !This->forward);
 147     if (This->refs)
 148         NineUnknown_Unbind(This->container);
 149     if (This->bind)
 150         NineUnknown_Unbind(This->container);
 151     This->container = NULL;
 152     if (!(This->refs | This->bind))
 153         This->dtor(This);
 154 }
 155
 156 #endif /* _NINE_IUNKNOWN_H_ */