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nanosleep: move windows logic to std.time

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Andrew Kelley 2019-05-27 12:16:32 -04:00
parent abf959a0c9
commit f1610f6c1d
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2 changed files with 8 additions and 13 deletions
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13
std/os.zig
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@ -2315,19 +2315,6 @@ pub fn realpathW(pathname: [*]const u16, out_buffer: *[MAX_PATH_BYTES]u8) RealPa
/// Spurious wakeups are possible and no precision of timing is guaranteed.
pub fn nanosleep(seconds: u64, nanoseconds: u64) void {
if (windows.is_the_target and !builtin.link_libc) {
// TODO https://github.com/ziglang/zig/issues/1284
const small_s = math.cast(windows.DWORD, seconds) catch math.maxInt(windows.DWORD);
const ms_from_s = math.mul(windows.DWORD, small_s, std.time.ms_per_s) catch math.maxInt(windows.DWORD);
const ns_per_ms = std.time.ns_per_s / std.time.ms_per_s;
const big_ms_from_ns = nanoseconds / ns_per_ms;
const ms_from_ns = math.cast(windows.DWORD, big_ms_from_ns) catch math.maxInt(windows.DWORD);
const ms = math.add(windows.DWORD, ms_from_s, ms_from_ns) catch math.maxInt(windows.DWORD);
windows.kernel32.Sleep(ms);
return;
}
var req = timespec{
.tv_sec = math.cast(isize, seconds) catch math.maxInt(isize),
.tv_nsec = math.cast(isize, nanoseconds) catch math.maxInt(isize),

8
std/time.zig
View File

@ -3,11 +3,19 @@ const std = @import("std.zig");
const assert = std.debug.assert;
const testing = std.testing;
const os = std.os;
const math = std.math;
pub const epoch = @import("time/epoch.zig");
/// Spurious wakeups are possible and no precision of timing is guaranteed.
pub fn sleep(nanoseconds: u64) void {
if (os.windows.is_the_target) {
const ns_per_ms = ns_per_s / ms_per_s;
const big_ms_from_ns = nanoseconds / ns_per_ms;
const ms = math.cast(os.windows.DWORD, big_ms_from_ns) catch math.maxInt(os.windows.DWORD);
os.windows.kernel32.Sleep(ms);
return;
}
const s = nanoseconds / ns_per_s;
const ns = nanoseconds % ns_per_s;
std.os.nanosleep(s, ns);