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WASI clock functions

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This commit is contained in:
Benjamin Feng 2019-11-19 19:44:19 -06:00
parent c3d93cd9f2
commit 14e9c7d1f2
1 changed files with 32 additions and 0 deletions
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32
lib/std/os/wasi.zig
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@ -76,3 +76,35 @@ pub extern "wasi_unstable" fn sched_yield() errno_t;
pub extern "wasi_unstable" fn sock_recv(sock: fd_t, ri_data: *const iovec_t, ri_data_len: usize, ri_flags: riflags_t, ro_datalen: *usize, ro_flags: *roflags_t) errno_t;
pub extern "wasi_unstable" fn sock_send(sock: fd_t, si_data: *const ciovec_t, si_data_len: usize, si_flags: siflags_t, so_datalen: *usize) errno_t;
pub extern "wasi_unstable" fn sock_shutdown(sock: fd_t, how: sdflags_t) errno_t;
/// Get the errno from a syscall return value, or 0 for no error.
pub fn getErrno(r: usize) usize {
const signed_r = @bitCast(isize, r);
return if (signed_r > -4096 and signed_r < 0) @intCast(usize, -signed_r) else 0;
}
pub fn clock_getres(clock_id: i32, res: *timespec) errno_t {
var ts: timestamp_t = undefined;
const err = clock_res_get(@bitCast(u32, clock_id), &ts);
if (err != 0) {
return err;
}
res.* = .{
.tv_sec = @intCast(i64, ts / 1000000000),
.tv_nsec = @intCast(isize, ts % 1000000000),
};
return 0;
}
pub fn clock_gettime(clock_id: i32, tp: *timespec) errno_t {
var ts: timestamp_t = undefined;
const err = clock_time_get(@bitCast(u32, clock_id), 1, &ts);
if (err != 0) {
return err;
}
tp.* = .{
.tv_sec = @intCast(i64, ts / 1000000000),
.tv_nsec = @intCast(isize, ts % 1000000000),
};
return 0;
}