add system for resetting TLS to initial values

[musl] / src / time / timer_create.c

diff --git a/src/time/timer_create.c b/src/time/timer_create.c
index 6cc2bcf..ee6a9c9 100644 (file)
--- a/src/time/timer_create.c
+++ b/src/time/timer_create.c
@@ -19,6 +19,8 @@ static void dummy_1(pthread_t self)
 }
 weak_alias(dummy_1, __pthread_tsd_run_dtors);
 
+void __reset_tls();
+
 static void cleanup_fromsig(void *p)
 {
        pthread_t self = __pthread_self();
@@ -28,6 +30,7 @@ static void cleanup_fromsig(void *p)
        self->canceldisable = 0;
        self->cancelasync = 0;
        self->unblock_cancel = 0;
+       __reset_tls();
        longjmp(p, 1);
 }
 
@@ -60,20 +63,18 @@ static void *start(void *arg)
 {
        pthread_t self = __pthread_self();
        struct start_args *args = arg;
-       sigset_t set;
+       int id;
 
        /* 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;
-
-       sigfillset(&set);
-       pthread_sigmask(SIG_BLOCK, &set, 0);
 
        pthread_barrier_wait(&args->b);
-       __wait(&self->delete_timer, 0, 0, 1);
-       __syscall(SYS_timer_delete, self->result);
+       if ((id = self->timer_id) >= 0) {
+               __wait(&self->timer_id, 0, id, 1);
+               __syscall(SYS_timer_delete, id);
+       }
        return 0;
 }
 
@@ -86,6 +87,7 @@ int timer_create(clockid_t clk, struct sigevent *restrict evp, timer_t *restrict
        struct start_args args;
        struct ksigevent ksev, *ksevp=0;
        int timerid;
+       sigset_t set;
 
        switch (evp ? evp->sigev_notify : SIGEV_SIGNAL) {
        case SIGEV_NONE:
@@ -99,7 +101,7 @@ int timer_create(clockid_t clk, struct sigevent *restrict evp, timer_t *restrict
                }
                if (syscall(SYS_timer_create, clk, ksevp, &timerid) < 0)
                        return -1;
-               *res = (void *)timerid;
+               *res = (void *)(intptr_t)timerid;
                break;
        case SIGEV_THREAD:
                pthread_once(&once, install_handler);
@@ -110,23 +112,25 @@ int timer_create(clockid_t clk, struct sigevent *restrict evp, timer_t *restrict
                pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
                pthread_barrier_init(&args.b, 0, 2);
                args.sev = evp;
+
+               __block_app_sigs(&set);
                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 = SIGTIMER;
                ksev.sigev_notify = 4; /* SIGEV_THREAD_ID */
                ksev.sigev_tid = td->tid;
-               r = syscall(SYS_timer_create, clk, &ksev, &timerid);
+               if (syscall(SYS_timer_create, clk, &ksev, &timerid) < 0)
+                       timerid = -1;
+               td->timer_id = timerid;
                pthread_barrier_wait(&args.b);
-               if (r < 0) {
-                       pthread_cancel(td);
-                       return -1;
-               }
-               td->result = (void *)timerid;
-               *res = td;
+               if (timerid < 0) return -1;
+               *res = (void *)(INTPTR_MIN | (uintptr_t)td>>1);
                break;
        default:
                errno = EINVAL;