MXUserRWLock *
MXUser_CreateRWLock(const char *userName, // IN:
MX_Rank rank) // IN:
{
Bool lockInited;
char *properName;
MXUserRWLock *lock;
Bool useNative = MXUserNativeRWSupported();
lock = Util_SafeCalloc(1, sizeof(*lock));
if (userName == NULL) {
if (LIKELY(useNative)) {
properName = Str_SafeAsprintf(NULL, "RW-%p", GetReturnAddress());
} else {
/* emulated */
properName = Str_SafeAsprintf(NULL, "RWemul-%p", GetReturnAddress());
}
} else {
properName = Util_SafeStrdup(userName);
}
lock->header.signature = MXUserGetSignature(MXUSER_TYPE_RW);
lock->header.name = properName;
lock->header.rank = rank;
lock->header.serialNumber = MXUserAllocSerialNumber();
lock->header.dumpFunc = MXUserDumpRWLock;
/*
* Always attempt to use native locks when they are available. If, for some
* reason, a native lock should be available but isn't, fall back to using
* an internal recursive lock - something is better than nothing.
*/
lock->useNative = useNative && MXUserNativeRWInit(&lock->nativeLock);
lockInited = MXRecLockInit(&lock->recursiveLock);
if (LIKELY(lockInited)) {
Bool doStats;
lock->holderTable = HashTable_Alloc(256,
HASH_INT_KEY | HASH_FLAG_ATOMIC,
MXUserFreeHashEntry);
if (vmx86_stats) {
doStats = MXUserStatsEnabled();
} else {
doStats = FALSE;
}
if (doStats) {
MXUser_ControlRWLock(lock, MXUSER_CONTROL_ENABLE_STATS);
} else {
lock->header.statsFunc = NULL;
Atomic_WritePtr(&lock->statsMem, NULL);
}
MXUserAddToList(&lock->header);
} else {
if (lock->useNative) {
MXUserNativeRWDestroy(&lock->nativeLock);
}
free(properName);
free(lock);
lock = NULL;
}
return lock;
}
MXUserRWLock *
MXUser_CreateRWLock(const char *userName, // IN:
MX_Rank rank) // IN:
{
Bool lockInited;
char *properName;
Bool useNative = MXUserNativeRWSupported();
MXUserRWLock *lock = Util_SafeCalloc(1, sizeof *lock);
if (userName == NULL) {
if (LIKELY(useNative)) {
properName = Str_SafeAsprintf(NULL, "RW-%p", GetReturnAddress());
} else {
/* emulated */
properName = Str_SafeAsprintf(NULL, "RWemul-%p", GetReturnAddress());
}
} else {
properName = Util_SafeStrdup(userName);
}
lock->header.signature = MXUserGetSignature(MXUSER_TYPE_RW);
lock->header.name = properName;
lock->header.rank = rank;
lock->header.bits.serialNumber = MXUserAllocSerialNumber();
lock->header.dumpFunc = MXUserDumpRWLock;
/*
* Always attempt to use native locks when they are available. If, for some
* reason, a native lock should be available but isn't, fall back to using
* an internal recursive lock - something is better than nothing.
*/
lock->useNative = useNative && MXUserNativeRWInit(&lock->nativeLock);
lockInited = MXRecLockInit(&lock->recursiveLock);
if (LIKELY(lockInited)) {
uint32 statsMode;
lock->holderTable = HashTable_Alloc(256,
HASH_INT_KEY | HASH_FLAG_ATOMIC,
MXUserFreeHashEntry);
statsMode = MXUserStatsMode();
switch (MXUserStatsMode()) {
case 0:
MXUserDisableStats(&lock->acquireStatsMem, &lock->heldStatsMem);
lock->header.statsFunc = NULL;
break;
case 1:
MXUserEnableStats(&lock->acquireStatsMem, NULL);
lock->header.statsFunc = MXUserStatsActionRW;
break;
case 2:
MXUserEnableStats(&lock->acquireStatsMem, &lock->heldStatsMem);
lock->header.statsFunc = MXUserStatsActionRW;
break;
default:
Panic("%s: unknown stats mode: %d!\n", __FUNCTION__, statsMode);
}
MXUserAddToList(&lock->header);
} else {
Panic("%s: native lock initialization routine failed\n", __FUNCTION__);
}
return lock;
}
