From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 10 Mar 2011 01:21:23 +0000 (-0500)
Subject: optimize pthread initialization
X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=commitdiff_plain;h=6dc05fbe198ccb326dceb8f05ee943f9a4dfb4ba

optimize pthread initialization

the set_tid_address returns the tid (which is also the pid when called
from the initial thread) so there is no need to make a separate
syscall to get pid/tid.
---

diff --git a/src/thread/pthread_self.c b/src/thread/pthread_self.c
index 028d387b..d2de2cb8 100644
--- a/src/thread/pthread_self.c
+++ b/src/thread/pthread_self.c
@@ -24,10 +24,10 @@ static int init_main_thread()
 	main_thread.self = &main_thread;
 	if (__set_thread_area(&main_thread) < 0)
 		return -1;
-	syscall1(__NR_set_tid_address, (long)&main_thread.tid);
 	main_thread.errno_ptr = __errno_location();
 	libc.errno_location = errno_location;
-	main_thread.tid = main_thread.pid = getpid();
+	main_thread.tid = main_thread.pid = 
+		syscall1(__NR_set_tid_address, (long)&main_thread.tid);
 	return 0;
 }