[git commit master 1/1] sleep: tiny code shrink
Denys Vlasenko
dvlasenk at redhat.com
Fri Oct 22 13:46:04 UTC 2010
commit: http://git.uclibc.org/uClibc/commit/?id=e9b9c97c33c52e9eafaf6bf6d682e43ecfa3aea7
branch: http://git.uclibc.org/uClibc/commit/?id=refs/heads/master
...or rather, it WILL BE code shrink when gcc become clever enough
to not emit a second, useless XORing of ebx:
31 db xor %ebx,%ebx
85 c0 test %eax,%eax
74 11 je 73 <__GI_sleep+0x73>
31 db xor %ebx,%ebx <=== ?!
Signed-off-by: Denys Vlasenko <dvlasenk at redhat.com>
---
libc/unistd/sleep.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/libc/unistd/sleep.c b/libc/unistd/sleep.c
index 438f5e2..6a237e3 100644
--- a/libc/unistd/sleep.c
+++ b/libc/unistd/sleep.c
@@ -82,6 +82,10 @@ unsigned int sleep (unsigned int seconds)
/* Run nanosleep, with SIGCHLD blocked if SIGCHLD is SIG_IGNed. */
result = nanosleep (&ts, &ts);
+ if (result != 0) {
+ /* Got EINTR. Return remaining time. */
+ result = (unsigned int) ts.tv_sec + (ts.tv_nsec >= 500000000L);
+ }
if (!__sigismember (&set, SIGCHLD)) {
/* We did block SIGCHLD, and old mask had no SIGCHLD bit.
@@ -91,10 +95,6 @@ unsigned int sleep (unsigned int seconds)
sigprocmask (SIG_SETMASK, &set, NULL); /* never fails */
}
- if (result != 0)
- /* Round remaining time. */
- result = (unsigned int) ts.tv_sec + (ts.tv_nsec >= 500000000L);
-
return result;
}
#endif
--
1.7.1
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