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Iterate more on recent changes

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Justine Tunney 2023-11-10 22:55:33 -08:00
parent 7138399f96
commit d0ad2694ed
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GPG key ID: BE714B4575D6E328
22 changed files with 90 additions and 158 deletions
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35
third_party/nsync/mu_semaphore_sem.c vendored
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@ -55,12 +55,24 @@ static struct {
static nsync_semaphore *sem_big_enough_for_sem = (nsync_semaphore *) (uintptr_t)(1 /
(sizeof (struct sem) <= sizeof (*sem_big_enough_for_sem)));
static void nsync_mu_semaphore_sem_create (struct sem *f) {
int lol;
f->id = 0;
ASSERT (!sys_sem_init (0, &f->id));
if ((lol = __sys_fcntl (f->id, F_DUPFD_CLOEXEC, 50)) >= 50) {
sys_close (f->id);
f->id = lol;
}
}
static void nsync_mu_semaphore_sem_fork_child (void) {
struct Dll *e;
struct sem *f;
for (e = dll_first (g_sems.list); e; e = dll_next (g_sems.list, e)) {
sys_close (SEM_CONTAINER (e)->id);
f = SEM_CONTAINER (e);
sys_close (f->id);
nsync_mu_semaphore_sem_create (f);
}
g_sems.list = 0; /* list memory is on dead thread stacks */
(void) pthread_spin_init (&g_sems.lock, 0);
}
@ -70,14 +82,8 @@ static void nsync_mu_semaphore_sem_init (void) {
/* Initialize *s; the initial value is 0. */
void nsync_mu_semaphore_init_sem (nsync_semaphore *s) {
int lol;
struct sem *f = (struct sem *) s;
f->id = 0;
ASSERT (!sys_sem_init (0, &f->id));
if ((lol = __sys_fcntl (f->id, F_DUPFD_CLOEXEC, 50)) >= 50) {
sys_close (f->id);
f->id = lol;
}
nsync_mu_semaphore_sem_create (f);
cosmo_once (&g_sems.once, nsync_mu_semaphore_sem_init);
pthread_spin_lock (&g_sems.lock);
dll_init (&f->list);
@ -86,17 +92,6 @@ void nsync_mu_semaphore_init_sem (nsync_semaphore *s) {
STRACE ("sem_init(0, [%ld]) → 0", f->id);
}
/* Releases system resources associated with *s. */
void nsync_mu_semaphore_destroy_sem (nsync_semaphore *s) {
int rc;
struct sem *f = (struct sem *) s;
ASSERT (!(rc = sys_sem_destroy (f->id)));
pthread_spin_lock (&g_sems.lock);
dll_remove (&g_sems.list, &f->list);
pthread_spin_unlock (&g_sems.lock);
STRACE ("sem_destroy(%ld) → %d", f->id, rc);
}
/* Wait until the count of *s exceeds 0, and decrement it. If POSIX cancellations
are currently disabled by the thread, then this function always succeeds. When
they're enabled in MASKED mode, this function may return ECANCELED. Otherwise,