From: Rich Felker <dalias@aerifal.cx>
Date: Sun, 22 Jan 2012 22:19:37 +0000 (-0500)
Subject: fix cancellation failure in single-threaded programs
X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=commitdiff_plain;h=ce7d72596c57386c493969cc56546c7aba2e1049

fix cancellation failure in single-threaded programs

even a single-threaded program can be cancellable, e.g. if it's called
pthread_cancel(pthread_self()). the correct predicate to check is not
whether multiple threads have been invoked, but whether pthread_self
has been invoked.
---

diff --git a/src/thread/cancel_impl.c b/src/thread/cancel_impl.c
index cf5082d3..7652a7c9 100644
--- a/src/thread/cancel_impl.c
+++ b/src/thread/cancel_impl.c
@@ -17,7 +17,7 @@ long (__syscall_cp)(long nr, long u, long v, long w, long x, long y, long z)
 	uintptr_t old_sp, old_ip;
 	long r;
 
-	if (!libc.threaded || (self = __pthread_self())->canceldisable)
+	if (!libc.main_thread || (self = __pthread_self())->canceldisable)
 		return __syscall(nr, u, v, w, x, y, z);
 
 	old_sp = self->cp_sp;