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a09e091a JB |
1 | /* |
2 | * Copyright © 2013 Keith Packard | |
3 | * | |
4 | * Permission to use, copy, modify, distribute, and sell this software and its | |
5 | * documentation for any purpose is hereby granted without fee, provided that | |
6 | * the above copyright notice appear in all copies and that both that copyright | |
7 | * notice and this permission notice appear in supporting documentation, and | |
8 | * that the name of the copyright holders not be used in advertising or | |
9 | * publicity pertaining to distribution of the software without specific, | |
10 | * written prior permission. The copyright holders make no representations | |
11 | * about the suitability of this software for any purpose. It is provided "as | |
12 | * is" without express or implied warranty. | |
13 | * | |
14 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
16 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | |
20 | * OF THIS SOFTWARE. | |
21 | */ | |
22 | ||
23 | #ifdef HAVE_DIX_CONFIG_H | |
24 | #include <dix-config.h> | |
25 | #endif | |
26 | ||
27 | #include "scrnintstr.h" | |
28 | #include "misync.h" | |
29 | #include "misyncstr.h" | |
30 | #include "misyncshm.h" | |
31 | #include "misyncfd.h" | |
32 | #include "pixmapstr.h" | |
33 | #include <sys/mman.h> | |
34 | #include <unistd.h> | |
35 | #include <fcntl.h> | |
36 | #include <X11/xshmfence.h> | |
37 | ||
38 | static DevPrivateKeyRec syncShmFencePrivateKey; | |
39 | ||
40 | typedef struct _SyncShmFencePrivate { | |
41 | struct xshmfence *fence; | |
42 | int fd; | |
43 | } SyncShmFencePrivateRec, *SyncShmFencePrivatePtr; | |
44 | ||
45 | #define SYNC_FENCE_PRIV(pFence) \ | |
46 | (SyncShmFencePrivatePtr) dixLookupPrivate(&pFence->devPrivates, &syncShmFencePrivateKey) | |
47 | ||
48 | static void | |
49 | miSyncShmFenceSetTriggered(SyncFence * pFence) | |
50 | { | |
51 | SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence); | |
52 | ||
53 | if (pPriv->fence) | |
54 | xshmfence_trigger(pPriv->fence); | |
55 | miSyncFenceSetTriggered(pFence); | |
56 | } | |
57 | ||
58 | static void | |
59 | miSyncShmFenceReset(SyncFence * pFence) | |
60 | { | |
61 | SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence); | |
62 | ||
63 | if (pPriv->fence) | |
64 | xshmfence_reset(pPriv->fence); | |
65 | miSyncFenceReset(pFence); | |
66 | } | |
67 | ||
68 | static Bool | |
69 | miSyncShmFenceCheckTriggered(SyncFence * pFence) | |
70 | { | |
71 | SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence); | |
72 | ||
73 | if (pPriv->fence) | |
74 | return xshmfence_query(pPriv->fence); | |
75 | else | |
76 | return miSyncFenceCheckTriggered(pFence); | |
77 | } | |
78 | ||
79 | static void | |
80 | miSyncShmFenceAddTrigger(SyncTrigger * pTrigger) | |
81 | { | |
82 | miSyncFenceAddTrigger(pTrigger); | |
83 | } | |
84 | ||
85 | static void | |
86 | miSyncShmFenceDeleteTrigger(SyncTrigger * pTrigger) | |
87 | { | |
88 | miSyncFenceDeleteTrigger(pTrigger); | |
89 | } | |
90 | ||
91 | static const SyncFenceFuncsRec miSyncShmFenceFuncs = { | |
92 | &miSyncShmFenceSetTriggered, | |
93 | &miSyncShmFenceReset, | |
94 | &miSyncShmFenceCheckTriggered, | |
95 | &miSyncShmFenceAddTrigger, | |
96 | &miSyncShmFenceDeleteTrigger | |
97 | }; | |
98 | ||
99 | static void | |
100 | miSyncShmScreenCreateFence(ScreenPtr pScreen, SyncFence * pFence, | |
101 | Bool initially_triggered) | |
102 | { | |
103 | SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence); | |
104 | ||
105 | pPriv->fence = NULL; | |
106 | miSyncScreenCreateFence(pScreen, pFence, initially_triggered); | |
107 | pFence->funcs = miSyncShmFenceFuncs; | |
108 | } | |
109 | ||
110 | static void | |
111 | miSyncShmScreenDestroyFence(ScreenPtr pScreen, SyncFence * pFence) | |
112 | { | |
113 | SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence); | |
114 | ||
115 | if (pPriv->fence) { | |
116 | xshmfence_trigger(pPriv->fence); | |
117 | xshmfence_unmap_shm(pPriv->fence); | |
118 | close(pPriv->fd); | |
119 | } | |
120 | miSyncScreenDestroyFence(pScreen, pFence); | |
121 | } | |
122 | ||
123 | static int | |
124 | miSyncShmCreateFenceFromFd(ScreenPtr pScreen, SyncFence *pFence, int fd, Bool initially_triggered) | |
125 | { | |
126 | SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence); | |
127 | ||
128 | miSyncInitFence(pScreen, pFence, initially_triggered); | |
129 | ||
130 | fd = os_move_fd(fd); | |
131 | pPriv->fence = xshmfence_map_shm(fd); | |
132 | if (pPriv->fence) { | |
133 | pPriv->fd = fd; | |
134 | return Success; | |
135 | } | |
136 | else | |
137 | close(fd); | |
138 | return BadValue; | |
139 | } | |
140 | ||
141 | static int | |
142 | miSyncShmGetFenceFd(ScreenPtr pScreen, SyncFence *pFence) | |
143 | { | |
144 | SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence); | |
145 | ||
146 | if (!pPriv->fence) { | |
147 | pPriv->fd = xshmfence_alloc_shm(); | |
148 | if (pPriv->fd < 0) | |
149 | return -1; | |
150 | pPriv->fd = os_move_fd(pPriv->fd); | |
151 | pPriv->fence = xshmfence_map_shm(pPriv->fd); | |
152 | if (!pPriv->fence) { | |
153 | close (pPriv->fd); | |
154 | return -1; | |
155 | } | |
156 | } | |
157 | return pPriv->fd; | |
158 | } | |
159 | ||
160 | static const SyncFdScreenFuncsRec miSyncShmScreenFuncs = { | |
161 | .version = SYNC_FD_SCREEN_FUNCS_VERSION, | |
162 | .CreateFenceFromFd = miSyncShmCreateFenceFromFd, | |
163 | .GetFenceFd = miSyncShmGetFenceFd | |
164 | }; | |
165 | ||
166 | _X_EXPORT Bool miSyncShmScreenInit(ScreenPtr pScreen) | |
167 | { | |
168 | SyncScreenFuncsPtr funcs; | |
169 | ||
170 | if (!miSyncFdScreenInit(pScreen, &miSyncShmScreenFuncs)) | |
171 | return FALSE; | |
172 | ||
173 | if (!dixPrivateKeyRegistered(&syncShmFencePrivateKey)) { | |
174 | if (!dixRegisterPrivateKey(&syncShmFencePrivateKey, PRIVATE_SYNC_FENCE, | |
175 | sizeof(SyncShmFencePrivateRec))) | |
176 | return FALSE; | |
177 | } | |
178 | ||
179 | funcs = miSyncGetScreenFuncs(pScreen); | |
180 | ||
181 | funcs->CreateFence = miSyncShmScreenCreateFence; | |
182 | funcs->DestroyFence = miSyncShmScreenDestroyFence; | |
183 | ||
184 | return TRUE; | |
185 | } | |
186 |