zx_ticks_per_second

NAME

Read the number of high-precision timer ticks in a second.

SYNOPSIS

  1. #include <zircon/syscalls.h>
  3. zx_ticks_t zx_ticks_per_second(void);

DESCRIPTION

zx_ticks_per_second() returns the number of high-precision timer ticks in a second.

This can be used together with zx_ticks_get() to calculate the amount of time elapsed between two subsequent calls to zx_ticks_get().

This value can vary from boot to boot of a given system. Once booted, this value is guaranteed not to change.

RIGHTS

TODO(fxbug.dev/32253)

RETURN VALUE

zx_ticks_per_second() returns the number of high-precision timer ticks in a second.

ERRORS

zx_ticks_per_second() does not report any error conditions.

EXAMPLES

  1. zx_ticks_t ticks_per_second = zx_ticks_per_second();
  2. zx_ticks_t ticks_start = zx_ticks_get();
  4. // do some more work
  6. zx_ticks_t ticks_end = zx_ticks_get();
  7. double elapsed_seconds = (ticks_end - ticks_start) / (double)ticks_per_second;

SEE ALSO