From 98acf04fc00cbded6169056f2cd541d31725c091 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Sat, 6 Aug 2011 20:09:51 -0400
Subject: use weak aliases rather than function pointers to simplify some code

---
 src/thread/cancel_dummy.c       | 6 ++++++
 src/thread/cancel_impl.c        | 3 +--
 src/thread/pthread_atfork.c     | 4 ++--
 src/thread/pthread_testcancel.c | 4 +++-
 4 files changed, 12 insertions(+), 5 deletions(-)

(limited to 'src/thread')

diff --git a/src/thread/cancel_dummy.c b/src/thread/cancel_dummy.c
index a39117e7..047692c4 100644
--- a/src/thread/cancel_dummy.c
+++ b/src/thread/cancel_dummy.c
@@ -6,3 +6,9 @@ static long sccp(long nr, long u, long v, long w, long x, long y, long z)
 }
 
 weak_alias(sccp, __syscall_cp);
+
+static void dummy()
+{
+}
+
+weak_alias(dummy, __testcancel);
diff --git a/src/thread/cancel_impl.c b/src/thread/cancel_impl.c
index 9a02e1a1..4f78a63a 100644
--- a/src/thread/cancel_impl.c
+++ b/src/thread/cancel_impl.c
@@ -58,7 +58,7 @@ static void cancel_handler(int sig, siginfo_t *si, void *ctx)
 		__syscall(SYS_tgkill, self->pid, self->tid, SIGCANCEL);
 }
 
-static void testcancel()
+void __testcancel()
 {
 	pthread_t self = __pthread_self();
 	if (self->cancel && !self->canceldisable)
@@ -73,7 +73,6 @@ static void init_cancellation()
 	};
 	sigfillset(&sa.sa_mask);
 	__libc_sigaction(SIGCANCEL, &sa, 0);
-	libc.testcancel = testcancel;
 }
 
 int pthread_cancel(pthread_t t)
diff --git a/src/thread/pthread_atfork.c b/src/thread/pthread_atfork.c
index 0773dc8f..a7a82016 100644
--- a/src/thread/pthread_atfork.c
+++ b/src/thread/pthread_atfork.c
@@ -10,9 +10,10 @@ static struct atfork_funcs {
 
 static int lock;
 
-static void fork_handler(int who)
+void __fork_handler(int who)
 {
 	struct atfork_funcs *p;
+	if (!funcs) return;
 	if (who < 0) {
 		LOCK(&lock);
 		for (p=funcs; p; p = p->next) {
@@ -35,7 +36,6 @@ int pthread_atfork(void (*prepare)(void), void (*parent)(void), void (*child)(vo
 	if (!new) return -1;
 
 	LOCK(&lock);
-	libc.fork_handler = fork_handler;
 	new->next = funcs;
 	new->prev = 0;
 	new->prepare = prepare;
diff --git a/src/thread/pthread_testcancel.c b/src/thread/pthread_testcancel.c
index c6b250b2..33238c0f 100644
--- a/src/thread/pthread_testcancel.c
+++ b/src/thread/pthread_testcancel.c
@@ -1,6 +1,8 @@
 #include "pthread_impl.h"
 
+void __testcancel(void);
+
 void pthread_testcancel()
 {
-	if (libc.testcancel) libc.testcancel();
+	__testcancel();
 }
-- 
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