#include <time.h>
+#include <setjmp.h>
+#include <limits.h>
#include "pthread_impl.h"
+#include "atomic.h"
struct ksigevent {
union sigval sigev_value;
struct sigevent *sev;
};
-void __sigtimer_handler(pthread_t self)
+static void dummy_0()
{
- int st;
- void (*notify)(union sigval) = (void (*)(union sigval))self->start;
- union sigval val = { .sival_ptr = self->start_arg };
-
- pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &st);
- notify(val);
- pthread_setcancelstate(st, 0);
}
+weak_alias(dummy_0, __pthread_tsd_run_dtors);
-static void cleanup(void *p)
+static void cleanup_fromsig(void *p)
{
- pthread_t self = p;
- __syscall(SYS_timer_delete, self->result);
+ pthread_t self = __pthread_self();
+ __pthread_tsd_run_dtors();
+ self->cancel = 0;
+ self->cancelbuf = 0;
+ self->canceldisable = 0;
+ self->cancelasync = 0;
+ __reset_tls();
+ longjmp(p, 1);
}
static void *start(void *arg)
{
pthread_t self = __pthread_self();
struct start_args *args = arg;
+ jmp_buf jb;
- /* Reuse no-longer-needed thread structure fields to avoid
- * needing the timer address in the signal handler. */
- self->start = (void *(*)(void *))args->sev->sigev_notify_function;
- self->start_arg = args->sev->sigev_value.sival_ptr;
- self->result = (void *)-1;
+ void (*notify)(union sigval) = args->sev->sigev_notify_function;
+ union sigval val = args->sev->sigev_value;
- pthread_cleanup_push(cleanup, self);
pthread_barrier_wait(&args->b);
- pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, 0);
- /* Loop on async-signal-safe cancellation point */
- for (;;) sleep(1000000000);
- pthread_cleanup_pop(0);
+ if (self->cancel)
+ return 0;
+ for (;;) {
+ siginfo_t si;
+ while (sigwaitinfo(SIGTIMER_SET, &si) < 0);
+ if (si.si_code == SI_TIMER && !setjmp(jb)) {
+ pthread_cleanup_push(cleanup_fromsig, jb);
+ notify(val);
+ pthread_cleanup_pop(1);
+ }
+ if (self->timer_id < 0) break;
+ }
+ __syscall(SYS_timer_delete, self->timer_id & INT_MAX);
return 0;
}
-int timer_create(clockid_t clk, struct sigevent *evp, timer_t *res)
+int timer_create(clockid_t clk, struct sigevent *restrict evp, timer_t *restrict res)
{
+ volatile static int init = 0;
pthread_t td;
pthread_attr_t attr;
int r;
struct start_args args;
struct ksigevent ksev, *ksevp=0;
int timerid;
+ sigset_t set;
switch (evp ? evp->sigev_notify : SIGEV_SIGNAL) {
case SIGEV_NONE:
case SIGEV_SIGNAL:
+ case SIGEV_THREAD_ID:
if (evp) {
ksev.sigev_value = evp->sigev_value;
ksev.sigev_signo = evp->sigev_signo;
ksev.sigev_notify = evp->sigev_notify;
- ksev.sigev_tid = 0;
+ if (evp->sigev_notify == SIGEV_THREAD_ID)
+ ksev.sigev_tid = evp->sigev_notify_thread_id;
+ else
+ ksev.sigev_tid = 0;
ksevp = &ksev;
}
if (syscall(SYS_timer_create, clk, ksevp, &timerid) < 0)
return -1;
- *res = (void *)timerid;
+ *res = (void *)(intptr_t)timerid;
break;
case SIGEV_THREAD:
+ if (!init) {
+ struct sigaction sa = { .sa_handler = SIG_DFL };
+ __libc_sigaction(SIGTIMER, &sa, 0);
+ a_store(&init, 1);
+ }
if (evp->sigev_notify_attributes)
attr = *evp->sigev_notify_attributes;
else
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
pthread_barrier_init(&args.b, 0, 2);
args.sev = evp;
+
+ __block_app_sigs(&set);
+ __syscall(SYS_rt_sigprocmask, SIG_BLOCK, SIGTIMER_SET, 0, _NSIG/8);
r = pthread_create(&td, &attr, start, &args);
+ __restore_sigs(&set);
if (r) {
errno = r;
return -1;
}
+
ksev.sigev_value.sival_ptr = 0;
- ksev.sigev_signo = SIGCANCEL;
- ksev.sigev_notify = 4; /* SIGEV_THREAD_ID */
+ ksev.sigev_signo = SIGTIMER;
+ ksev.sigev_notify = SIGEV_THREAD_ID;
ksev.sigev_tid = td->tid;
- r = syscall(SYS_timer_create, clk, &ksev, &timerid);
- pthread_barrier_wait(&args.b);
- if (r < 0) {
- pthread_cancel(td);
- return -1;
+ if (syscall(SYS_timer_create, clk, &ksev, &timerid) < 0) {
+ timerid = -1;
+ td->cancel = 1;
}
- td->result = (void *)timerid;
- *res = td;
+ td->timer_id = timerid;
+ pthread_barrier_wait(&args.b);
+ if (timerid < 0) return -1;
+ *res = (void *)(INTPTR_MIN | (uintptr_t)td>>1);
break;
default:
errno = EINVAL;