misync.c revision 1b5d61b8 
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
32DevPrivateKeyRec miSyncScreenPrivateKey;
33
34/* Default implementations of the sync screen functions */
35void
36miSyncScreenCreateFence(ScreenPtr pScreen, SyncFence * pFence,
37                        Bool initially_triggered)
38{
39    (void) pScreen;
40
41    pFence->triggered = initially_triggered;
42}
43
44void
45miSyncScreenDestroyFence(ScreenPtr pScreen, SyncFence * pFence)
46{
47    (void) pScreen;
48    (void) pFence;
49}
50
51/* Default implementations of the per-object functions */
52void
53miSyncFenceSetTriggered(SyncFence * pFence)
54{
55    pFence->triggered = TRUE;
56}
57
58void
59miSyncFenceReset(SyncFence * pFence)
60{
61    pFence->triggered = FALSE;
62}
63
64Bool
65miSyncFenceCheckTriggered(SyncFence * pFence)
66{
67    return pFence->triggered;
68}
69
70void
71miSyncFenceAddTrigger(SyncTrigger * pTrigger)
72{
73    (void) pTrigger;
74
75    return;
76}
77
78void
79miSyncFenceDeleteTrigger(SyncTrigger * pTrigger)
80{
81    (void) pTrigger;
82
83    return;
84}
85
86/* Machine independent portion of the fence sync object implementation */
87void
88miSyncInitFence(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
106void
107miSyncDestroyFence(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
126void
127miSyncTriggerFence(SyncFence * pFence)
128{
129    SyncTriggerList *ptl, *pNext;
130
131    pFence->funcs.SetTriggered(pFence);
132
133    /* run through triggers to see if any fired */
134    for (ptl = pFence->sync.pTriglist; ptl; ptl = pNext) {
135        pNext = ptl->next;
136        if ((*ptl->pTrigger->CheckTrigger) (ptl->pTrigger, 0))
137            (*ptl->pTrigger->TriggerFired) (ptl->pTrigger);
138    }
139}
140
141SyncScreenFuncsPtr
142miSyncGetScreenFuncs(ScreenPtr pScreen)
143{
144    SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
145
146    return &pScreenPriv->funcs;
147}
148
149static Bool
150SyncCloseScreen(ScreenPtr pScreen)
151{
152    SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
153
154    pScreen->CloseScreen = pScreenPriv->CloseScreen;
155
156    return (*pScreen->CloseScreen) (pScreen);
157}
158
159Bool
160miSyncSetup(ScreenPtr pScreen)
161{
162    SyncScreenPrivPtr pScreenPriv;
163
164    static const SyncScreenFuncsRec miSyncScreenFuncs = {
165        &miSyncScreenCreateFence,
166        &miSyncScreenDestroyFence
167    };
168
169    if (!dixPrivateKeyRegistered(&miSyncScreenPrivateKey)) {
170        if (!dixRegisterPrivateKey(&miSyncScreenPrivateKey, PRIVATE_SCREEN,
171                                   sizeof(SyncScreenPrivRec)))
172            return FALSE;
173    }
174
175    pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
176
177    if (!pScreenPriv->funcs.CreateFence) {
178        pScreenPriv->funcs = miSyncScreenFuncs;
179
180        /* Wrap CloseScreen to clean up */
181        pScreenPriv->CloseScreen = pScreen->CloseScreen;
182        pScreen->CloseScreen = SyncCloseScreen;
183    }
184
185    return TRUE;
186}
187