3 #include "pthread_impl.h"
6 union sigval sigev_value;
20 weak_alias(dummy_0, __pthread_tsd_run_dtors);
22 static void cleanup_fromsig(void *p)
24 pthread_t self = __pthread_self();
25 __pthread_tsd_run_dtors(self);
28 self->canceldisable = 0;
29 self->cancelasync = 0;
30 self->unblock_cancel = 0;
35 static void timer_handler(int sig, siginfo_t *si, void *ctx)
37 pthread_t self = __pthread_self();
39 void (*notify)(union sigval) = (void (*)(union sigval))self->start;
40 union sigval val = { .sival_ptr = self->start_arg };
42 if (!setjmp(jb) && si->si_code == SI_TIMER) {
43 pthread_cleanup_push(cleanup_fromsig, jb);
45 pthread_cleanup_pop(1);
49 static void install_handler()
51 struct sigaction sa = {
52 .sa_sigaction = timer_handler,
53 .sa_flags = SA_SIGINFO | SA_RESTART
55 __libc_sigaction(SIGTIMER, &sa, 0);
58 static void *start(void *arg)
60 pthread_t self = __pthread_self();
61 struct start_args *args = arg;
64 /* Reuse no-longer-needed thread structure fields to avoid
65 * needing the timer address in the signal handler. */
66 self->start = (void *(*)(void *))args->sev->sigev_notify_function;
67 self->start_arg = args->sev->sigev_value.sival_ptr;
69 pthread_barrier_wait(&args->b);
70 if ((id = self->timer_id) >= 0) {
71 __syscall(SYS_rt_sigprocmask, SIG_UNBLOCK,
72 SIGTIMER_SET, 0, _NSIG/8);
73 __wait(&self->timer_id, 0, id, 1);
74 __syscall(SYS_timer_delete, id);
79 int timer_create(clockid_t clk, struct sigevent *restrict evp, timer_t *restrict res)
81 static pthread_once_t once = PTHREAD_ONCE_INIT;
85 struct start_args args;
86 struct ksigevent ksev, *ksevp=0;
90 switch (evp ? evp->sigev_notify : SIGEV_SIGNAL) {
94 ksev.sigev_value = evp->sigev_value;
95 ksev.sigev_signo = evp->sigev_signo;
96 ksev.sigev_notify = evp->sigev_notify;
100 if (syscall(SYS_timer_create, clk, ksevp, &timerid) < 0)
102 *res = (void *)(intptr_t)timerid;
105 pthread_once(&once, install_handler);
106 if (evp->sigev_notify_attributes)
107 attr = *evp->sigev_notify_attributes;
109 pthread_attr_init(&attr);
110 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
111 pthread_barrier_init(&args.b, 0, 2);
114 __block_app_sigs(&set);
115 r = pthread_create(&td, &attr, start, &args);
116 __restore_sigs(&set);
122 ksev.sigev_value.sival_ptr = 0;
123 ksev.sigev_signo = SIGTIMER;
124 ksev.sigev_notify = 4; /* SIGEV_THREAD_ID */
125 ksev.sigev_tid = td->tid;
126 if (syscall(SYS_timer_create, clk, &ksev, &timerid) < 0)
128 td->timer_id = timerid;
129 pthread_barrier_wait(&args.b);
130 if (timerid < 0) return -1;
131 *res = (void *)(INTPTR_MIN | (uintptr_t)td>>1);