nanosleep - high resolution sleep
#include <zircon/syscalls.h>
zx_status_t zx_nanosleep(zx_time_t deadline);
zx_nanosleep() suspends the calling thread execution until deadline passes on
ZX_CLOCK_MONOTONIC. A deadline value less than or equal to 0
immediately yields the thread.
To sleep for a duration, use zx_deadline_after() and the
ZX_<time-unit> helpers:
#include <zircon/syscalls.h> // zx_deadline_after, zx_nanosleep
#include <zircon/types.h> // ZX_MSEC et al.
// Sleep 50 milliseconds
zx_nanosleep(zx_deadline_after(ZX_MSEC(50)));
The nanosleep duration has 10% late slack with a minimum slack time of 1
microsecond and a maximum slack time of 1 second. This slack time is the amount
of additional time that the thread might sleep before being rescheduled. For
example, a thread that requests a nanosleep with a duration of 1 second will
have a slack time of .1 second. This means that the thread will sleep anywhere
between 1 and 1.1 seconds. See zx_timer_set() for a more in-depth
description of slack.
The slack is included so the operating system can coalesce sleeps for performance and energy reasons. If more precise timing is needed, it is recommended to use a timer.
None.
zx_nanosleep() always returns ZX_OK.