void
_thr_wake_all(unsigned int *waddrs[], int count)
{
int i;
for (i = 0; i < count; ++i)
*waddrs[i] = 1;
_umtx_op(waddrs, UMTX_OP_NWAKE_PRIVATE, count, NULL, NULL);
}
/*
* Among all processes sharing a lock only one executes
* pthread_lock_destroy(). Other processes still have the hash and
* mapped off-page.
*
* Mitigate the problem by checking the liveness of all hashed keys
* periodically. Right now this is executed on each
* pthread_lock_destroy(), but may be done less often if found to be
* too time-consuming.
*/
static void
pshared_gc(struct pthread *curthread)
{
struct pshared_hash_head *hd;
struct psh *h, *h1;
int error, i;
pshared_wlock(curthread);
for (i = 0; i < HASH_SIZE; i++) {
hd = &pshared_hash[i];
LIST_FOREACH_SAFE(h, hd, link, h1) {
error = _umtx_op(NULL, UMTX_OP_SHM, UMTX_SHM_ALIVE,
h->val, NULL);
if (error == 0)
continue;
LIST_REMOVE(h, link);
munmap(h->val, PAGE_SIZE);
free(h);
}
}
int _umtx_op_err(void *obj, int op, u_long val, void *uaddr, void *uaddr2)
{
if (_umtx_op(obj, op, val, uaddr, uaddr2) == -1)
return (errno);
return (0);
}
