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/*
* Copyright © 2013 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "scrnintstr.h"
#include "misync.h"
#include "misyncstr.h"
#include "misyncshm.h"
#include "pixmapstr.h"
#include <sys/mman.h>
#include <unistd.h>
#include <X11/xshmfence.h>
static DevPrivateKeyRec syncShmFencePrivateKey;
typedef struct _SyncShmFencePrivate {
int32_t *fence;
int fd;
} SyncShmFencePrivateRec, *SyncShmFencePrivatePtr;
#define SYNC_FENCE_PRIV(pFence) \
(SyncShmFencePrivatePtr) dixLookupPrivate(&pFence->devPrivates, &syncShmFencePrivateKey)
static void
miSyncShmFenceSetTriggered(SyncFence * pFence)
{
SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence);
if (pPriv->fence)
xshmfence_trigger(pPriv->fence);
miSyncFenceSetTriggered(pFence);
}
static void
miSyncShmFenceReset(SyncFence * pFence)
{
SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence);
if (pPriv->fence)
xshmfence_reset(pPriv->fence);
miSyncFenceReset(pFence);
}
static Bool
miSyncShmFenceCheckTriggered(SyncFence * pFence)
{
SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence);
if (pPriv->fence)
return xshmfence_query(pPriv->fence);
else
return miSyncFenceCheckTriggered(pFence);
}
static void
miSyncShmFenceAddTrigger(SyncTrigger * pTrigger)
{
miSyncFenceAddTrigger(pTrigger);
}
static void
miSyncShmFenceDeleteTrigger(SyncTrigger * pTrigger)
{
miSyncFenceDeleteTrigger(pTrigger);
}
static const SyncFenceFuncsRec miSyncShmFenceFuncs = {
&miSyncShmFenceSetTriggered,
&miSyncShmFenceReset,
&miSyncShmFenceCheckTriggered,
&miSyncShmFenceAddTrigger,
&miSyncShmFenceDeleteTrigger
};
static void
miSyncShmScreenCreateFence(ScreenPtr pScreen, SyncFence * pFence,
Bool initially_triggered)
{
SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence);
pPriv->fence = NULL;
miSyncScreenCreateFence(pScreen, pFence, initially_triggered);
pFence->funcs = miSyncShmFenceFuncs;
}
static void
miSyncShmScreenDestroyFence(ScreenPtr pScreen, SyncFence * pFence)
{
SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence);
if (pPriv->fence) {
xshmfence_trigger(pPriv->fence);
xshmfence_unmap_shm(pPriv->fence);
close(pPriv->fd);
}
miSyncScreenDestroyFence(pScreen, pFence);
}
int
miSyncInitFenceFromFD(DrawablePtr pDraw, SyncFence *pFence, int fd, BOOL initially_triggered)
{
SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence);
miSyncInitFence(pDraw->pScreen, pFence, initially_triggered);
pPriv->fence = xshmfence_map_shm(fd);
if (pPriv->fence) {
pPriv->fd = fd;
return Success;
}
else
close(fd);
return BadValue;
}
int
miSyncFDFromFence(DrawablePtr pDraw, SyncFence *pFence)
{
SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence);
if (!pPriv->fence) {
pPriv->fd = xshmfence_alloc_shm();
if (pPriv->fd < 0)
return -1;
pPriv->fence = xshmfence_map_shm(pPriv->fd);
if (!pPriv->fence) {
close (pPriv->fd);
return -1;
}
}
return pPriv->fd;
}
_X_EXPORT Bool miSyncShmScreenInit(ScreenPtr pScreen)
{
SyncScreenFuncsPtr funcs;
if (!miSyncSetup(pScreen))
return FALSE;
if (!dixPrivateKeyRegistered(&syncShmFencePrivateKey)) {
if (!dixRegisterPrivateKey(&syncShmFencePrivateKey, PRIVATE_SYNC_FENCE,
sizeof(SyncShmFencePrivateRec)))
return FALSE;
}
funcs = miSyncGetScreenFuncs(pScreen);
funcs->CreateFence = miSyncShmScreenCreateFence;
funcs->DestroyFence = miSyncShmScreenDestroyFence;
return TRUE;
}
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