minix/minix/lib/libsys/getticks.c
David van Moolenbroek d91f738bd8 Kernel: export clock information on kernel page
Please note that this information is for use by system services only!
The clock facility is not ready to be used directly by userland, and
thus, this kernel page extension is NOT part of the userland ABI.

For service programmers' convenience, change the prototype of the
getticks(3) to return the uptime clock value directly, since the call
can no longer fail.

Correct the sys_times(2) reply message to use the right field type
for the boot time.

Restructure the kernel internals a bit so as to have all the clock
stuff closer together.

Change-Id: Ifc050b7bd253aecbe46e3bd7d7cc75bd86e45555
2015-09-23 12:00:46 +00:00

14 lines
279 B
C

#include "sysutil.h"
/*
* Return the number of clock ticks since system boot. Note that the value may
* wrap on overflow.
*/
clock_t
getticks(void)
{
/* We assume atomic 32-bit field retrieval. TODO: 64-bit support. */
return get_minix_kerninfo()->kclockinfo->uptime;
}