NANOSLEEP(2) BSD System Calls Manual NANOSLEEP(2)NAME
nanosleep -- suspend thread execution for an interval measured in nanoseconds
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <time.h>
int
nanosleep(const struct timespec *rqtp, struct timespec *rmtp);
DESCRIPTION
The nanosleep() function causes the calling thread to sleep for the amount of time specified in rqtp (the actual time slept may be longer,
due to system latencies and possible limitations in the timer resolution of the hardware). An unmasked signal will cause nanosleep() to ter-
minate the sleep early, regardless of the SA_RESTART value on the interrupting signal.
RETURN VALUES
If nanosleep() returns because the requested time has elapsed, the value returned will be zero.
If nanosleep() returns due to the delivery of a signal, the value returned will be the -1, and the global variable errno will be set to indi-
cate the interruption. If rmtp is non-NULL, the timespec structure it references is updated to contain the unslept amount (the request time
minus the time actually slept).
ERRORS
The nanosleep() call fails if:
[EINTR] nanosleep() was interrupted by the delivery of a signal.
[EINVAL] rqtp specified a nanosecond value less than zero or greater than or equal to 1000 million.
SEE ALSO sigsuspend(2), sleep(3)STANDARDS
The nanosleep() function conforms to IEEE Std 1003.1b-1993 (``POSIX.1'').
BSD April 17, 1997 BSD
Check Out this Related Man Page
NANOSLEEP(2) BSD System Calls Manual NANOSLEEP(2)NAME
nanosleep -- high resolution sleep
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <time.h>
int
nanosleep(const struct timespec *rqtp, struct timespec *rmtp);
DESCRIPTION
The nanosleep() suspends execution of the calling process until either the number of seconds and nanoseconds specified by rqtp have elapsed
or a signal is delivered to the calling process and its action is to invoke a signal catching function or to terminate the process. The sus-
pension time may be longer than requested due to the scheduling of other activity by the system. The struct timespec is described in
timespec(3).
RETURN VALUES
If the nanosleep() function returns because the requested time has elapsed, the value returned will be zero.
If the nanosleep() function returns due to the delivery of a signal, the value returned will be the -1, and the global variable errno will be
set to indicate the interruption. If rmtp is non-NULL, the timespec structure it references is updated to contain the unslept amount (the
request time minus the time actually slept).
ERRORS
If any of the following conditions occur, the nanosleep function shall return -1 and set errno to the corresponding value.
[EFAULT] Either rqtp or rmtp points to memory that is not a valid part of the process address space.
[EINTR] nanosleep was interrupted by the delivery of a signal.
[EINVAL] rqtp specified a nanosecond value less than zero or greater than 1000 million.
[ENOSYS] nanosleep is not supported by this implementation.
SEE ALSO sleep(3), timespec(3)STANDARDS
The nanosleep() function conforms to IEEE Std 1003.1b-1993 (``POSIX.1'').
BSD May 17, 2010 BSD
Hello,
Can anyone, please, guide me on the use of nanosleep. I'm learning threads. I want to introduce a delay (not nested for loops, something more customizable). Nanosleep looked useful (or any other form of customizable and easy-to-use delay). Sleep is too long. :) (2 Replies)
Hi,
I have encountered the following problem on Solaris 10:
I have a thread that is asleep on nanosleep (set to 24 hours).
Something that happens on another thread, causes the nanosleep to exit, even though the time has not elapsed.
The returned value is 0 (so it doesn't look like it... (1 Reply)
Hi @ll :)
I have a problem with my code but first a short description:
1. I have one signal call SIGUSR1
2. In the signal I try to use nanosleep and now:
When I put kill -SIGUSR1 pid --> sometimes works fine, sometimes returns me an error with ,,Interrupt system call", sometimes I got... (5 Replies)