X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Ftime%2Ftimer_create.c;h=455d49fc5035beca4b3f2b97553311d389cff164;hb=ff5b8ad386d900e4a4c11ecdfb52dceadd9d0ee9;hp=c107e150d12a66794cb274b3b4066af9e2b6fe0b;hpb=2063c4cac27f118c21dcb9352e8a4903131c88c8;p=musl

diff --git a/src/time/timer_create.c b/src/time/timer_create.c
index c107e150..455d49fc 100644
--- a/src/time/timer_create.c
+++ b/src/time/timer_create.c
@@ -1,4 +1,6 @@
 #include <time.h>
+#include <setjmp.h>
+#include <limits.h>
 #include "pthread_impl.h"
 
 struct ksigevent {
@@ -13,57 +15,70 @@ struct start_args {
 	struct sigevent *sev;
 };
 
-static void dummy_1(pthread_t self)
+static void dummy_0()
 {
 }
-weak_alias(dummy_1, __pthread_tsd_run_dtors);
+weak_alias(dummy_0, __pthread_tsd_run_dtors);
 
 static void cleanup_fromsig(void *p)
 {
 	pthread_t self = __pthread_self();
+	__pthread_tsd_run_dtors();
 	self->cancel = 0;
 	self->cancelbuf = 0;
-	__pthread_tsd_run_dtors(self);
+	self->canceldisable = 0;
+	self->cancelasync = 0;
+	__reset_tls();
 	longjmp(p, 1);
 }
 
-void __sigtimer_handler(pthread_t self)
+static void timer_handler(int sig, siginfo_t *si, void *ctx)
 {
-	jmp_buf jb;
-	void (*notify)(union sigval) = (void (*)(union sigval))self->start;
-	union sigval val = { .sival_ptr = self->start_arg };
+}
 
-	if (setjmp(jb)) return;
-	pthread_cleanup_push(cleanup_fromsig, jb);
-	notify(val);
-	pthread_cleanup_pop(0);
+static void install_handler()
+{
+	struct sigaction sa = {
+		.sa_sigaction = timer_handler,
+		.sa_flags = SA_SIGINFO | SA_RESTART
+	};
+	__libc_sigaction(SIGTIMER, &sa, 0);
 }
 
 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_barrier_wait(&args->b);
-	__wait(&self->delete_timer, 0, 0, 1);
-	__syscall(SYS_timer_delete, self->result);
+	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)
 {
+	static pthread_once_t once = PTHREAD_ONCE_INIT;
 	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:
@@ -77,9 +92,10 @@ int timer_create(clockid_t clk, struct sigevent *evp, timer_t *res)
 		}
 		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);
 		if (evp->sigev_notify_attributes)
 			attr = *evp->sigev_notify_attributes;
 		else
@@ -87,23 +103,26 @@ int timer_create(clockid_t clk, struct sigevent *evp, timer_t *res)
 		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_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;