| 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 | |