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From 82f01ad7869e3f2be51e41a8246dab5982bbc36a Mon Sep 17 00:00:00 2001
From: Alex Goins <agoins@nvidia.com>
Date: Wed, 10 Apr 2019 13:48:02 -0500
Subject: [PATCH xserver 1/5] xsync: Add resource inside of SyncCreate, export
SyncCreate
As shown by DRI3 adding the SyncCreateFenceFromFD() function, extensions may
want to create a fence, then initialize it in their own way. This currently
can't be done without adding a function directly to Xext/sync.c due to the fact
that the RTFence resource type is private and there is no external interface to
add to it.
To facilitate other X extensions creating fences and initializing them, this
change exports SyncCreate() and adds the resource directly within it. Callers no
longer need to call AddResource() after SyncCreate(), they only need to
initialize the SyncObject.
To prevent FreeFence() and FreeCounter() from segfaulting if the call to
AddResource() fails before the sync object is initialized, this adds a new
'initialized' parameter to SyncObject that, when FALSE, causes FreeFence() and
FreeCounter() to skip de-initialization and simply free the object.
Initialization after adding the resource shouldn't otherwise be a problem due to
the single-threaded nature of X.
Signed-off-by: Alex Goins <agoins@nvidia.com>
Reviewed-by: James Jones <jajones@nvidia.com>
Signed-off-by: Aaron Plattner <aplattner@nvidia.com>
(cherry picked from commit 7f962c70b6d9c346477f23f6c15211e749110078)
---
Xext/sync.c | 50 +++++++++++++++++++++++-------------------
Xext/syncsdk.h | 3 +++
miext/sync/misync.c | 27 +++++++++++++----------
miext/sync/misync.h | 1 +
miext/sync/misyncstr.h | 5 +++--
5 files changed, 51 insertions(+), 35 deletions(-)
diff --git a/Xext/sync.c b/Xext/sync.c
index 8f22a865bb..fd2ceb0423 100644
--- a/Xext/sync.c
+++ b/Xext/sync.c
@@ -881,18 +881,21 @@ SyncChangeAlarmAttributes(ClientPtr client, SyncAlarm * pAlarm, Mask mask,
return Success;
}
-static SyncObject *
+SyncObject *
SyncCreate(ClientPtr client, XID id, unsigned char type)
{
SyncObject *pSync;
+ RESTYPE resType;
switch (type) {
case SYNC_COUNTER:
pSync = malloc(sizeof(SyncCounter));
+ resType = RTCounter;
break;
case SYNC_FENCE:
pSync = (SyncObject *) dixAllocateObjectWithPrivates(SyncFence,
PRIVATE_SYNC_FENCE);
+ resType = RTFence;
break;
default:
return NULL;
@@ -901,6 +904,11 @@ SyncCreate(ClientPtr client, XID id, unsigned char type)
if (!pSync)
return NULL;
+ pSync->initialized = FALSE;
+
+ if (!AddResource(id, resType, (void *) pSync))
+ return NULL;
+
pSync->client = client;
pSync->id = id;
pSync->pTriglist = NULL;
@@ -923,13 +931,10 @@ SyncCreateFenceFromFD(ClientPtr client, DrawablePtr pDraw, XID id, int fd, BOOL
status = miSyncInitFenceFromFD(pDraw, pFence, fd, initially_triggered);
if (status != Success) {
- dixFreeObjectWithPrivates(pFence, PRIVATE_SYNC_FENCE);
+ FreeResource(pFence->sync.id, RT_NONE);
return status;
}
- if (!AddResource(id, RTFence, (void *) pFence))
- return BadAlloc;
-
return Success;
#else
return BadImplementation;
@@ -957,8 +962,7 @@ SyncCreateCounter(ClientPtr client, XSyncCounter id, int64_t initialvalue)
pCounter->value = initialvalue;
pCounter->pSysCounterInfo = NULL;
- if (!AddResource(id, RTCounter, (void *) pCounter))
- return NULL;
+ pCounter->sync.initialized = TRUE;
return pCounter;
}
@@ -1137,21 +1141,26 @@ static int
FreeCounter(void *env, XID id)
{
SyncCounter *pCounter = (SyncCounter *) env;
- SyncTriggerList *ptl, *pnext;
pCounter->sync.beingDestroyed = TRUE;
- /* tell all the counter's triggers that the counter has been destroyed */
- for (ptl = pCounter->sync.pTriglist; ptl; ptl = pnext) {
- (*ptl->pTrigger->CounterDestroyed) (ptl->pTrigger);
- pnext = ptl->next;
- free(ptl); /* destroy the trigger list as we go */
- }
- if (IsSystemCounter(pCounter)) {
- xorg_list_del(&pCounter->pSysCounterInfo->entry);
- free(pCounter->pSysCounterInfo->name);
- free(pCounter->pSysCounterInfo->private);
- free(pCounter->pSysCounterInfo);
+
+ if (pCounter->sync.initialized) {
+ SyncTriggerList *ptl, *pnext;
+
+ /* tell all the counter's triggers that counter has been destroyed */
+ for (ptl = pCounter->sync.pTriglist; ptl; ptl = pnext) {
+ (*ptl->pTrigger->CounterDestroyed) (ptl->pTrigger);
+ pnext = ptl->next;
+ free(ptl); /* destroy the trigger list as we go */
+ }
+ if (IsSystemCounter(pCounter)) {
+ xorg_list_del(&pCounter->pSysCounterInfo->entry);
+ free(pCounter->pSysCounterInfo->name);
+ free(pCounter->pSysCounterInfo->private);
+ free(pCounter->pSysCounterInfo);
+ }
}
+
free(pCounter);
return Success;
}
@@ -1889,9 +1898,6 @@ ProcSyncCreateFence(ClientPtr client)
miSyncInitFence(pDraw->pScreen, pFence, stuff->initially_triggered);
- if (!AddResource(stuff->fid, RTFence, (void *) pFence))
- return BadAlloc;
-
return Success;
}
diff --git a/Xext/syncsdk.h b/Xext/syncsdk.h
index f1b99d010b..c88285cb13 100644
--- a/Xext/syncsdk.h
+++ b/Xext/syncsdk.h
@@ -29,6 +29,9 @@
extern _X_EXPORT int
SyncVerifyFence(SyncFence ** ppFence, XID fid, ClientPtr client, Mask mode);
+extern _X_EXPORT SyncObject*
+ SyncCreate(ClientPtr client, XID id, unsigned char type);
+
#define VERIFY_SYNC_FENCE(pFence, fid, client, mode) \
do { \
int rc; \
diff --git a/miext/sync/misync.c b/miext/sync/misync.c
index 490fa0b172..0931803f6c 100644
--- a/miext/sync/misync.c
+++ b/miext/sync/misync.c
@@ -101,25 +101,30 @@ miSyncInitFence(ScreenPtr pScreen, SyncFence * pFence, Bool initially_triggered)
pFence->funcs = miSyncFenceFuncs;
pScreenPriv->funcs.CreateFence(pScreen, pFence, initially_triggered);
+
+ pFence->sync.initialized = TRUE;
}
void
miSyncDestroyFence(SyncFence * pFence)
{
- ScreenPtr pScreen = pFence->pScreen;
- SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
- SyncTriggerList *ptl, *pNext;
-
pFence->sync.beingDestroyed = TRUE;
- /* tell all the fence's triggers that the counter has been destroyed */
- for (ptl = pFence->sync.pTriglist; ptl; ptl = pNext) {
- (*ptl->pTrigger->CounterDestroyed) (ptl->pTrigger);
- pNext = ptl->next;
- free(ptl); /* destroy the trigger list as we go */
+
+ if (pFence->sync.initialized) {
+ ScreenPtr pScreen = pFence->pScreen;
+ SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
+ SyncTriggerList *ptl, *pNext;
+
+ /* tell all the fence's triggers that the counter has been destroyed */
+ for (ptl = pFence->sync.pTriglist; ptl; ptl = pNext) {
+ (*ptl->pTrigger->CounterDestroyed) (ptl->pTrigger);
+ pNext = ptl->next;
+ free(ptl); /* destroy the trigger list as we go */
+ }
+
+ pScreenPriv->funcs.DestroyFence(pScreen, pFence);
}
- pScreenPriv->funcs.DestroyFence(pScreen, pFence);
-
dixFreeObjectWithPrivates(pFence, PRIVATE_SYNC_FENCE);
}
diff --git a/miext/sync/misync.h b/miext/sync/misync.h
index dc78c5fdb3..f7082d5ea4 100644
--- a/miext/sync/misync.h
+++ b/miext/sync/misync.h
@@ -28,6 +28,7 @@
#ifndef _MISYNC_H_
#define _MISYNC_H_
+typedef struct _SyncObject SyncObject;
typedef struct _SyncFence SyncFence;
typedef struct _SyncTrigger SyncTrigger;
diff --git a/miext/sync/misyncstr.h b/miext/sync/misyncstr.h
index 2eab2aa576..2a6e84a964 100644
--- a/miext/sync/misyncstr.h
+++ b/miext/sync/misyncstr.h
@@ -38,13 +38,14 @@
#define SYNC_COUNTER 0
#define SYNC_FENCE 1
-typedef struct _SyncObject {
+struct _SyncObject {
ClientPtr client; /* Owning client. 0 for system counters */
struct _SyncTriggerList *pTriglist; /* list of triggers */
XID id; /* resource ID */
unsigned char type; /* SYNC_* */
+ Bool initialized; /* FALSE if created but not initialized */
Bool beingDestroyed; /* in process of going away */
-} SyncObject;
+};
typedef struct _SyncCounter {
SyncObject sync; /* Common sync object data */
--
2.21.0
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