mirror/glibc
2
0
Fork 0
mirror of git://sourceware.org/git/glibc.git synced 2025-03-25 13:51:04 +08:00
Code Issues Packages Projects Releases Wiki Activity

linux: Add ppoll time64 optimization

Browse Source 
It avoid continuing issue the __NR_ppoll_time64 syscall once the kernel
advertise it does not support it.

Checked on x86_64-linux-gnu and i686-linux-gnu (on 5.4 and on 4.15
kernel).

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Adhemerval Zanella 2020-07-10 13:50:56 -03:00
parent ecdcafa571
commit 60a2e28b34
1 changed files with 13 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
sysdeps/unix/sysv/linux/ppoll.c
View File

@ -22,6 +22,7 @@
#include <sys/poll.h>
#include <sysdep-cancel.h>
#include <kernel-features.h>
#include <time64-support.h>
int
@ -37,16 +38,23 @@ __ppoll64 (struct pollfd *fds, nfds_t nfds, const struct __timespec64 *timeout,
timeout = &tval;
}
int ret;
if (supports_time64 ())
{
#ifndef __NR_ppoll_time64
# define __NR_ppoll_time64 __NR_ppoll
#endif
int ret = SYSCALL_CANCEL (ppoll_time64, fds, nfds, timeout, sigmask,
__NSIG_BYTES);
ret = SYSCALL_CANCEL (ppoll_time64, fds, nfds, timeout, sigmask,
__NSIG_BYTES);
if (ret == 0 || errno != ENOSYS)
return ret;
mark_time64_unsupported ();
}
#ifndef __ASSUME_TIME64_SYSCALLS
if (ret >= 0 || errno != ENOSYS)
return ret;
struct timespec ts32;
if (timeout)
{