miext/sync/misync.c

   1 /*
   2  * Copyright © 2010 NVIDIA Corporation
   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  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #ifdef HAVE_DIX_CONFIG_H
  25 #include <dix-config.h>
  26 #endif
  27
  28 #include "scrnintstr.h"
  29 #include "misync.h"
  30 #include "misyncstr.h"
  31
  32 DevPrivateKeyRec miSyncScreenPrivateKey;
  33
  34 /* Default implementations of the sync screen functions */
  35 void
  36 miSyncScreenCreateFence(ScreenPtr pScreen, SyncFence * pFence,
  37                         Bool initially_triggered)
  38 {
  39     (void) pScreen;
  40
  41     pFence->triggered = initially_triggered;
  42 }
  43
  44 void
  45 miSyncScreenDestroyFence(ScreenPtr pScreen, SyncFence * pFence)
  46 {
  47     (void) pScreen;
  48     (void) pFence;
  49 }
  50
  51 /* Default implementations of the per-object functions */
  52 void
  53 miSyncFenceSetTriggered(SyncFence * pFence)
  54 {
  55     pFence->triggered = TRUE;
  56 }
  57
  58 void
  59 miSyncFenceReset(SyncFence * pFence)
  60 {
  61     pFence->triggered = FALSE;
  62 }
  63
  64 Bool
  65 miSyncFenceCheckTriggered(SyncFence * pFence)
  66 {
  67     return pFence->triggered;
  68 }
  69
  70 void
  71 miSyncFenceAddTrigger(SyncTrigger * pTrigger)
  72 {
  73     (void) pTrigger;
  74
  75     return;
  76 }
  77
  78 void
  79 miSyncFenceDeleteTrigger(SyncTrigger * pTrigger)
  80 {
  81     (void) pTrigger;
  82
  83     return;
  84 }
  85
  86 /* Machine independent portion of the fence sync object implementation */
  87 void
  88 miSyncInitFence(ScreenPtr pScreen, SyncFence * pFence, Bool initially_triggered)
  89 {
  90     SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
  91
  92     static const SyncFenceFuncsRec miSyncFenceFuncs = {
  93         &miSyncFenceSetTriggered,
  94         &miSyncFenceReset,
  95         &miSyncFenceCheckTriggered,
  96         &miSyncFenceAddTrigger,
  97         &miSyncFenceDeleteTrigger
  98     };
  99
 100     pFence->pScreen = pScreen;
 101     pFence->funcs = miSyncFenceFuncs;
 102
 103     pScreenPriv->funcs.CreateFence(pScreen, pFence, initially_triggered);
 104 }
 105
 106 void
 107 miSyncDestroyFence(SyncFence * pFence)
 108 {
 109     ScreenPtr pScreen = pFence->pScreen;
 110     SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
 111     SyncTriggerList *ptl, *pNext;
 112
 113     pFence->sync.beingDestroyed = TRUE;
 114     /* tell all the fence's triggers that the counter has been destroyed */
 115     for (ptl = pFence->sync.pTriglist; ptl; ptl = pNext) {
 116         (*ptl->pTrigger->CounterDestroyed) (ptl->pTrigger);
 117         pNext = ptl->next;
 118         free(ptl);              /* destroy the trigger list as we go */
 119     }
 120
 121     pScreenPriv->funcs.DestroyFence(pScreen, pFence);
 122
 123     dixFreeObjectWithPrivates(pFence, PRIVATE_SYNC_FENCE);
 124 }
 125
 126 void
 127 miSyncTriggerFence(SyncFence * pFence)
 128 {
 129     SyncTriggerList *ptl, *pNext;
 130     CARD64 unused;
 131
 132     pFence->funcs.SetTriggered(pFence);
 133
 134     XSyncIntToValue(&unused, 0L);
 135
 136     /* run through triggers to see if any fired */
 137     for (ptl = pFence->sync.pTriglist; ptl; ptl = pNext) {
 138         pNext = ptl->next;
 139         if ((*ptl->pTrigger->CheckTrigger) (ptl->pTrigger, unused))
 140             (*ptl->pTrigger->TriggerFired) (ptl->pTrigger);
 141     }
 142 }
 143
 144 SyncScreenFuncsPtr
 145 miSyncGetScreenFuncs(ScreenPtr pScreen)
 146 {
 147     SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
 148
 149     return &pScreenPriv->funcs;
 150 }
 151
 152 static Bool
 153 SyncCloseScreen(ScreenPtr pScreen)
 154 {
 155     SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
 156
 157     pScreen->CloseScreen = pScreenPriv->CloseScreen;
 158
 159     return (*pScreen->CloseScreen) (pScreen);
 160 }
 161
 162 Bool
 163 miSyncSetup(ScreenPtr pScreen)
 164 {
 165     SyncScreenPrivPtr pScreenPriv;
 166
 167     static const SyncScreenFuncsRec miSyncScreenFuncs = {
 168         &miSyncScreenCreateFence,
 169         &miSyncScreenDestroyFence
 170     };
 171
 172     if (!dixPrivateKeyRegistered(&miSyncScreenPrivateKey)) {
 173         if (!dixRegisterPrivateKey(&miSyncScreenPrivateKey, PRIVATE_SCREEN,
 174                                    sizeof(SyncScreenPrivRec)))
 175             return FALSE;
 176     }
 177
 178     pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
 179
 180     if (!pScreenPriv->funcs.CreateFence) {
 181         pScreenPriv->funcs = miSyncScreenFuncs;
 182
 183         /* Wrap CloseScreen to clean up */
 184         pScreenPriv->CloseScreen = pScreen->CloseScreen;
 185         pScreen->CloseScreen = SyncCloseScreen;
 186     }
 187
 188     return TRUE;
 189 }