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| author | Eric van Gyzen <vangyzen@FreeBSD.org> | 2017-03-19 00:51:12 +0000 |
|---|---|---|
| committer | Eric van Gyzen <vangyzen@FreeBSD.org> | 2017-03-19 00:51:12 +0000 |
| commit | 3f8455b0905a05552b1155e09165787e1d098060 (patch) | |
| tree | 7e464dbfe7b8012fa2a68d9d0a7b2d3a07b11df3 /lib/libthr | |
| parent | a776eeafdcaae027734542d69612d35971b55c1c (diff) | |
| download | src-3f8455b0905a05552b1155e09165787e1d098060.tar.gz src-3f8455b0905a05552b1155e09165787e1d098060.zip | |
Add clock_nanosleep()
Add a clock_nanosleep() syscall, as specified by POSIX.
Make nanosleep() a wrapper around it.
Attach the clock_nanosleep test from NetBSD. Adjust it for the
FreeBSD behavior of updating rmtp only when interrupted by a signal.
I believe this to be POSIX-compliant, since POSIX mentions the rmtp
parameter only in the paragraph about EINTR. This is also what
Linux does. (NetBSD updates rmtp unconditionally.)
Copy the whole nanosleep.2 man page from NetBSD because it is complete
and closely resembles the POSIX description. Edit, polish, and reword it
a bit, being sure to keep any relevant text from the FreeBSD page.
Reviewed by: kib, ngie, jilles
MFC after: 3 weeks
Relnotes: yes
Sponsored by: Dell EMC
Differential Revision: https://reviews.freebsd.org/D10020
Notes
Notes:
svn path=/head/; revision=315526
Diffstat (limited to 'lib/libthr')
| -rw-r--r-- | lib/libthr/thread/thr_private.h | 2 | ||||
| -rw-r--r-- | lib/libthr/thread/thr_syscalls.c | 17 |
2 files changed, 19 insertions, 0 deletions
diff --git a/lib/libthr/thread/thr_private.h b/lib/libthr/thread/thr_private.h index 9bea65f38491..56ecdb441310 100644 --- a/lib/libthr/thread/thr_private.h +++ b/lib/libthr/thread/thr_private.h @@ -865,6 +865,8 @@ int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info); /* #include <time.h> */ #ifdef _TIME_H_ +int __sys_clock_nanosleep(clockid_t, int, const struct timespec *, + struct timespec *); int __sys_nanosleep(const struct timespec *, struct timespec *); #endif diff --git a/lib/libthr/thread/thr_syscalls.c b/lib/libthr/thread/thr_syscalls.c index 362826ca2f91..92d0c99d2831 100644 --- a/lib/libthr/thread/thr_syscalls.c +++ b/lib/libthr/thread/thr_syscalls.c @@ -260,6 +260,22 @@ __thr_msync(void *addr, size_t len, int flags) } static int +__thr_clock_nanosleep(clockid_t clock_id, int flags, + const struct timespec *time_to_sleep, struct timespec *time_remaining) +{ + struct pthread *curthread; + int ret; + + curthread = _get_curthread(); + _thr_cancel_enter(curthread); + ret = __sys_clock_nanosleep(clock_id, flags, time_to_sleep, + time_remaining); + _thr_cancel_leave(curthread, 1); + + return (ret); +} + +static int __thr_nanosleep(const struct timespec *time_to_sleep, struct timespec *time_remaining) { @@ -668,6 +684,7 @@ __thr_interpose_libc(void) SLOT(ppoll); SLOT(map_stacks_exec); SLOT(fdatasync); + SLOT(clock_nanosleep); #undef SLOT *(__libc_interposing_slot( INTERPOS__pthread_mutex_init_calloc_cb)) = |