xref: /aosp_15_r20/external/musl/src/time/clock_getres.c (revision c9945492fdd68bbe62686c5b452b4dc1be3f8453)
1*c9945492SAndroid Build Coastguard Worker #include <time.h>
2*c9945492SAndroid Build Coastguard Worker #include "syscall.h"
3*c9945492SAndroid Build Coastguard Worker 
clock_getres(clockid_t clk,struct timespec * ts)4*c9945492SAndroid Build Coastguard Worker int clock_getres(clockid_t clk, struct timespec *ts)
5*c9945492SAndroid Build Coastguard Worker {
6*c9945492SAndroid Build Coastguard Worker #ifdef SYS_clock_getres_time64
7*c9945492SAndroid Build Coastguard Worker 	/* On a 32-bit arch, use the old syscall if it exists. */
8*c9945492SAndroid Build Coastguard Worker 	if (SYS_clock_getres != SYS_clock_getres_time64) {
9*c9945492SAndroid Build Coastguard Worker 		long ts32[2];
10*c9945492SAndroid Build Coastguard Worker 		int r = __syscall(SYS_clock_getres, clk, ts32);
11*c9945492SAndroid Build Coastguard Worker 		if (!r && ts) {
12*c9945492SAndroid Build Coastguard Worker 			ts->tv_sec = ts32[0];
13*c9945492SAndroid Build Coastguard Worker 			ts->tv_nsec = ts32[1];
14*c9945492SAndroid Build Coastguard Worker 		}
15*c9945492SAndroid Build Coastguard Worker 		return __syscall_ret(r);
16*c9945492SAndroid Build Coastguard Worker 	}
17*c9945492SAndroid Build Coastguard Worker #endif
18*c9945492SAndroid Build Coastguard Worker 	/* If reaching this point, it's a 64-bit arch or time64-only
19*c9945492SAndroid Build Coastguard Worker 	 * 32-bit arch and we can get result directly into timespec. */
20*c9945492SAndroid Build Coastguard Worker 	return syscall(SYS_clock_getres, clk, ts);
21*c9945492SAndroid Build Coastguard Worker }
22