cut out a syscall on thread creation in the case where guard size is 0

[musl] / src / thread / __timedwait.c

diff --git a/src/thread/__timedwait.c b/src/thread/__timedwait.c
index 354def2..988eb70 100644 (file)
--- a/src/thread/__timedwait.c
+++ b/src/thread/__timedwait.c
@@ -6,6 +6,7 @@
 #include <stdio.h>
 int __timedwait(volatile int *addr, int val, clockid_t clk, const struct timespec *at, int priv)
 {
+       int r;
        struct timespec to;
        if (at) {
                clock_gettime(clk, &to);
@@ -17,5 +18,7 @@ int __timedwait(volatile int *addr, int val, clockid_t clk, const struct timespe
                if (to.tv_sec < 0) return ETIMEDOUT;
        }
        if (priv) priv = 128; priv=0;
-       return syscall4(__NR_futex, (long)addr, FUTEX_WAIT | priv, val, at ? (long)&to : 0);
+       r = syscall4(__NR_futex, (long)addr, FUTEX_WAIT | priv, val, at ? (long)&to : 0);
+       if (r == ETIMEDOUT) return r;
+       return 0;
 }