Bool
MXUser_TryAcquireExclLock(MXUserExclLock *lock) // IN/OUT:
{
Bool success;
ASSERT(lock);
MXUserValidateHeader(&lock->header, MXUSER_TYPE_EXCL);
if (MXUserTryAcquireFail(lock->header.name)) {
return FALSE;
}
success = MXRecLockTryAcquire(&lock->recursiveLock);
if (success) {
MXUserAcquisitionTracking(&lock->header, FALSE);
if (vmx86_debug && (MXRecLockCount(&lock->recursiveLock) > 1)) {
MXUserDumpAndPanic(&lock->header,
"%s: Acquire on an acquired exclusive lock\n",
__FUNCTION__);
}
}
if (vmx86_stats) {
MXUserStats *stats = Atomic_ReadPtr(&lock->statsMem);
if (LIKELY(stats != NULL)) {
MXUserAcquisitionSample(&stats->acquisitionStats, success, !success,
0ULL);
}
}
return success;
}
Bool
MXUser_TryAcquireRecLock(MXUserRecLock *lock) // IN/OUT:
{
Bool success;
ASSERT(lock);
MXUserValidateHeader(&lock->header, MXUSER_TYPE_REC);
ASSERT(Atomic_Read(&lock->refCount) > 0);
if (UNLIKELY(lock->vmmLock != NULL)) {
ASSERT(MXUserMX_TryLockRec);
success = (*MXUserMX_TryLockRec)(lock->vmmLock);
} else {
if (MXUserTryAcquireFail(lock->header.name)) {
success = FALSE;
goto bail;
}
success = MXRecLockTryAcquire(&lock->recursiveLock);
if (success) {
MXUserAcquisitionTracking(&lock->header, FALSE);
}
if (vmx86_stats) {
MXUserAcquireStats *acquireStats;
acquireStats = Atomic_ReadPtr(&lock->acquireStatsMem);
if (LIKELY(acquireStats != NULL)) {
MXUserAcquisitionSample(&acquireStats->data, success, !success,
0ULL);
}
}
}
bail:
return success;
}
void
MXUser_PerLockData(void)
{
MXRecLock *listLock = MXUserInternalSingleton(&mxLockMemPtr);
if (mxUserStatsFunc == NULL) {
return;
}
if (listLock && MXRecLockTryAcquire(listLock)) {
ListItem *entry;
uint32 highestSerialNumber;
static uint32 lastReportedSerialNumber = 0;
highestSerialNumber = lastReportedSerialNumber;
LIST_SCAN(entry, mxUserLockList) {
MXUserHeader *header = LIST_CONTAINER(entry, MXUserHeader, item);
/* Log the ID information for a lock that did exist previously */
if (header->bits.serialNumber > lastReportedSerialNumber) {
MXUserStatsLog("MXUser: n n=%s l=%d r=0x%x\n", header->name,
header->bits.serialNumber, header->rank);
if (header->bits.serialNumber > highestSerialNumber) {
highestSerialNumber = header->bits.serialNumber;
}
}
/*
* Perform the statistics action for any lock that has one.
*/
if (header->statsFunc) {
(*header->statsFunc)(header);
}
}
