From: Alexander Lobakin <alobakin@pm.me>
To: Rich Felker <dalias@aerifal.cx>, musl@lists.openwall.com
Cc: Alexander Lobakin <alobakin@pm.me>
Subject: [musl] [PATCH 11/18] pselect, select: prefer time64 variant of pselect6 if available
Date: Sun, 27 Dec 2020 18:42:01 +0000 [thread overview]
Message-ID: <20201227184032.22413-11-alobakin@pm.me> (raw)
In-Reply-To: <20201227184032.22413-1-alobakin@pm.me>
Instead of using time64 variant "only when needed", use it as
a default and fallback to time32 only on -ENOSYS.
Also use deprecated select only as a last chance.
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
---
src/select/pselect.c | 6 ++----
src/select/select.c | 22 ++++++++++++----------
2 files changed, 14 insertions(+), 14 deletions(-)
diff --git a/src/select/pselect.c b/src/select/pselect.c
index 54cfb291bba2..f68616a247de 100644
--- a/src/select/pselect.c
+++ b/src/select/pselect.c
@@ -13,10 +13,8 @@ int pselect(int n, fd_set *restrict rfds, fd_set *restrict wfds, fd_set *restric
time_t s = ts ? ts->tv_sec : 0;
long ns = ts ? ts->tv_nsec : 0;
#ifdef SYS_pselect6_time64
- int r = -ENOSYS;
- if (SYS_pselect6 == SYS_pselect6_time64 || !IS32BIT(s))
- r = __syscall_cp(SYS_pselect6_time64, n, rfds, wfds, efds,
- ts ? ((long long[]){s, ns}) : 0, data);
+ int r = __syscall_cp(SYS_pselect6_time64, n, rfds, wfds, efds,
+ ts ? ((long long[]){s, ns}) : 0, data);
if (SYS_pselect6 == SYS_pselect6_time64 || r!=-ENOSYS)
return __syscall_ret(r);
s = CLAMP(s);
diff --git a/src/select/select.c b/src/select/select.c
index 8a7868840304..d2dbb7b08362 100644
--- a/src/select/select.c
+++ b/src/select/select.c
@@ -13,6 +13,7 @@ int select(int n, fd_set *restrict rfds, fd_set *restrict wfds, fd_set *restrict
suseconds_t us = tv ? tv->tv_usec : 0;
long ns;
const time_t max_time = (1ULL<<8*sizeof(time_t)-1)-1;
+ int r = -ENOSYS;
if (s<0 || us<0) return __syscall_ret(-EINVAL);
if (us/1000000 > max_time - s) {
@@ -26,19 +27,20 @@ int select(int n, fd_set *restrict rfds, fd_set *restrict wfds, fd_set *restrict
}
#ifdef SYS_pselect6_time64
- int r = -ENOSYS;
- if (SYS_pselect6 == SYS_pselect6_time64 || !IS32BIT(s))
- r = __syscall_cp(SYS_pselect6_time64, n, rfds, wfds, efds,
- tv ? ((long long[]){s, ns}) : 0,
- ((syscall_arg_t[]){ 0, _NSIG/8 }));
+ r = __syscall_cp(SYS_pselect6_time64, n, rfds, wfds, efds,
+ tv ? ((long long[]){s, ns}) : 0,
+ ((syscall_arg_t[]){ 0, _NSIG/8 }));
if (SYS_pselect6 == SYS_pselect6_time64 || r!=-ENOSYS)
return __syscall_ret(r);
#endif
-#ifdef SYS_select
- return syscall_cp(SYS_select, n, rfds, wfds, efds,
- tv ? ((long[]){s, us}) : 0);
-#else
- return syscall_cp(SYS_pselect6, n, rfds, wfds, efds,
+#ifdef SYS_pselect6
+ r = __syscall_cp(SYS_pselect6, n, rfds, wfds, efds,
tv ? ((long[]){s, ns}) : 0, ((syscall_arg_t[]){ 0, _NSIG/8 }));
#endif
+#ifdef SYS_select
+ if (r == -ENOSYS)
+ r = __syscall_cp(SYS_select, n, rfds, wfds, efds,
+ tv ? ((long[]){s, us}) : 0);
+#endif
+ return __syscall_ret(r);
}
--
2.29.2
next prev parent reply other threads:[~2020-12-27 18:56 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-27 18:39 [musl] [PATCH 00/18] time64: always prefer time64 syscalls Alexander Lobakin
2020-12-27 18:40 ` [musl] [PATCH 01/18] clock_gettime: prefer time64 variant if available Alexander Lobakin
2020-12-27 18:40 ` [musl] [PATCH 02/18] clock_settime: " Alexander Lobakin
2020-12-27 18:41 ` [musl] [PATCH 03/18] clock_adjtime: try adjtimex at last Alexander Lobakin
2020-12-27 21:57 ` Rich Felker
2020-12-27 18:41 ` [musl] [PATCH 04/18] clock_getres: use time64 variant by default Alexander Lobakin
2020-12-27 18:41 ` [musl] [PATCH 05/18] clock_nanosleep: prefer time64 variant if available Alexander Lobakin
2020-12-27 18:41 ` [musl] [PATCH 06/18] timer_gettime: " Alexander Lobakin
2020-12-27 18:41 ` [musl] [PATCH 07/18] timer_settime: " Alexander Lobakin
2020-12-27 18:41 ` [musl] [PATCH 08/18] timerfd_gettime: " Alexander Lobakin
2020-12-27 18:41 ` [musl] [PATCH 09/18] timerfd_settime: " Alexander Lobakin
2020-12-27 18:41 ` [musl] [PATCH 10/18] utimensat: " Alexander Lobakin
2020-12-27 18:42 ` Alexander Lobakin [this message]
2020-12-27 18:42 ` [musl] [PATCH 12/18] poll, ppoll: prefer time64 variant of ppoll " Alexander Lobakin
2020-12-27 18:42 ` [musl] [PATCH 13/18] mq_timedsend: prefer time64 variant " Alexander Lobakin
2020-12-27 18:42 ` [musl] [PATCH 14/18] mq_timedreceive: " Alexander Lobakin
2020-12-27 18:42 ` [musl] [PATCH 15/18] semtimedop: prefer time64 variant of semtimedop " Alexander Lobakin
2020-12-27 18:42 ` [musl] [PATCH 16/18] [rt_]sigtimedwait: prefer time64 variant " Alexander Lobakin
2020-12-27 18:42 ` [musl] [PATCH 17/18] futex: " Alexander Lobakin
2020-12-27 22:18 ` Rich Felker
2020-12-27 18:42 ` [musl] [PATCH 18/18] sched_rr_get_interval: use " Alexander Lobakin
2020-12-27 21:54 ` [musl] [PATCH 01/18] clock_gettime: prefer " Rich Felker
2020-12-27 21:52 ` [musl] [PATCH 00/18] time64: always prefer time64 syscalls Rich Felker
2020-12-28 11:11 ` Alexander Lobakin
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