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Remove signal handling for nanosleep (bug 16364)

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Linux 2.6.32 and forward do not show the issue regarding SysV SIGCHLD
vs. SIG_IGN for nanosleep which make it feasible to use it for sleep
implementation without requiring any hacking to handle the spurious
wake up.  The issue is likely being fixed before 2.6 and git
history [1] [2].

This patch simplifies the sleep code to call nanosleep directly by
using the posix default version.  It also removes the early cancellation
tests for zero argument, since nanosleep will handle cancellation
in this case.

[1] https://lkml.org/lkml/2004/11/25/5
[2] https://lkml.org/lkml/2003/11/8/50

Checked on x86_64, ppc64le, and aarch64.

	[BZ #16364]
	* sysdeps/unix/sysv/linux/sleep.c: Remove file
	* sysdeps/posix/sleep.c (__sleep): Simplify cancellation handling.
This commit is contained in:
Adhemerval Zanella
2015-11-08 20:06:42 -02:00
committed by Adhemerval Zanella
parent 31cf39421b
commit 8c873bf019
3 changed files with 6 additions and 158 deletions
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9
sysdeps/posix/sleep.c
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@ -32,15 +32,6 @@
unsigned int
__sleep (unsigned int seconds)
{
/* This is not necessary but some buggy programs depend on it. */
if (__glibc_unlikely (seconds == 0))
{
#ifdef CANCELLATION_P
CANCELLATION_P (THREAD_SELF);
#endif
return 0;
}
int save_errno = errno;
const unsigned int max