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Message-ID: <20201227184032.22413-5-alobakin@pm.me>
Date: Sun, 27 Dec 2020 18:41:16 +0000
From: Alexander Lobakin <alobakin@...me>
To: Rich Felker <dalias@...ifal.cx>, musl@...ts.openwall.com
Cc: Alexander Lobakin <alobakin@...me>
Subject: [PATCH 05/18] clock_nanosleep: prefer time64 variant if available
Instead of using time64 variant "only when needed", use it as
a default and fallback to time32 only on -ENOSYS.
Also use deprecated nanosleep only as a last chance.
Signed-off-by: Alexander Lobakin <alobakin@...me>
---
src/time/clock_nanosleep.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
diff --git a/src/time/clock_nanosleep.c b/src/time/clock_nanosleep.c
index e195499cc072..ea090eb8c313 100644
--- a/src/time/clock_nanosleep.c
+++ b/src/time/clock_nanosleep.c
@@ -11,27 +11,29 @@ int __clock_nanosleep(clockid_t clk, int flags, const struct timespec *req, stru
#ifdef SYS_clock_nanosleep_time64
time_t s = req->tv_sec;
long ns = req->tv_nsec;
- int r = -ENOSYS;
- if (SYS_clock_nanosleep == SYS_clock_nanosleep_time64 || !IS32BIT(s))
- r = __syscall_cp(SYS_clock_nanosleep_time64, clk, flags,
- ((long long[]){s, ns}), rem);
+ int r = __syscall_cp(SYS_clock_nanosleep_time64, clk, flags,
+ ((long long[]){s, ns}), rem);
if (SYS_clock_nanosleep == SYS_clock_nanosleep_time64 || r!=-ENOSYS)
return -r;
long long extra = s - CLAMP(s);
long ts32[2] = { CLAMP(s), ns };
- if (clk == CLOCK_REALTIME && !flags)
+ r = __syscall_cp(SYS_clock_nanosleep, clk, flags, &ts32, &ts32);
+#ifdef SYS_nanosleep
+ if (r == -ENOSYS && clk == CLOCK_REALTIME && !flags)
r = __syscall_cp(SYS_nanosleep, &ts32, &ts32);
- else
- r = __syscall_cp(SYS_clock_nanosleep, clk, flags, &ts32, &ts32);
+#endif
if (r==-EINTR && rem && !(flags & TIMER_ABSTIME)) {
rem->tv_sec = ts32[0] + extra;
rem->tv_nsec = ts32[1];
}
return -r;
#else
- if (clk == CLOCK_REALTIME && !flags)
- return -__syscall_cp(SYS_nanosleep, req, rem);
- return -__syscall_cp(SYS_clock_nanosleep, clk, flags, req, rem);
+ int r = __syscall_cp(SYS_clock_nanosleep, clk, flags, req, rem);
+#ifdef SYS_nanosleep
+ if (r == -ENOSYS && clk == CLOCK_REALTIME && !flags)
+ r = __syscall_cp(SYS_nanosleep, req, rem);
+#endif
+ return -r;
#endif
}
--
2.29.2
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