Merge pull request 'std.Io.Threaded: clock_nanosleep is not linux-only' (#30746) from clock_nanosleep into master

Reviewed-on: https://codeberg.org/ziglang/zig/pulls/30746

lib/std/Io/Threaded.zig

@@ -9664,14 +9664,12 @@ fn nowWasi(clock: Io.Clock) Io.Clock.Error!Io.Timestamp {
 fn sleep(userdata: ?*anyopaque, timeout: Io.Timeout) Io.SleepError!void {
     const t: *Threaded = @ptrCast(@alignCast(userdata));
     if (use_parking_sleep) return parking_sleep.sleep(timeout);
-    switch (native_os) {
-        .wasi => return sleepWasi(t, timeout),
-        .linux => return sleepLinux(timeout),
-        else => return sleepPosix(t, timeout),
-    }
+    if (native_os == .wasi) return sleepWasi(t, timeout);
+    if (@TypeOf(posix.system.clock_nanosleep) != void) return sleepPosix(timeout);
+    return sleepNanosleep(t, timeout);
 }
 
-fn sleepLinux(timeout: Io.Timeout) Io.SleepError!void {
+fn sleepPosix(timeout: Io.Timeout) Io.SleepError!void {
     const clock_id: posix.clockid_t = clockToPosix(switch (timeout) {
         .none => .awake,
         .duration => |d| d.clock,
@@ -9685,7 +9683,7 @@ fn sleepLinux(timeout: Io.Timeout) Io.SleepError!void {
     var timespec: posix.timespec = timestampToPosix(deadline_nanoseconds);
     const syscall: Syscall = try .start();
     while (true) {
-        switch (std.os.linux.errno(std.os.linux.clock_nanosleep(clock_id, .{ .ABSTIME = switch (timeout) {
+        switch (posix.errno(posix.system.clock_nanosleep(clock_id, .{ .ABSTIME = switch (timeout) {
             .none, .duration => false,
             .deadline => true,
         } }, &timespec, &timespec))) {
@@ -9737,7 +9735,7 @@ fn sleepWasi(t: *Threaded, timeout: Io.Timeout) Io.SleepError!void {
     syscall.finish();
 }
 
-fn sleepPosix(t: *Threaded, timeout: Io.Timeout) Io.SleepError!void {
+fn sleepNanosleep(t: *Threaded, timeout: Io.Timeout) Io.SleepError!void {
     const t_io = ioBasic(t);
     const sec_type = @typeInfo(posix.timespec).@"struct".fields[0].type;
     const nsec_type = @typeInfo(posix.timespec).@"struct".fields[1].type;

lib/std/c.zig

@@ -10588,7 +10588,7 @@ pub const socket = switch (native_os) {
 
 pub const socketpair = switch (native_os) {
     // https://devblogs.microsoft.com/commandline/af_unix-comes-to-windows/#unsupported\unavailable:
-    .windows => void,
+    .windows => {},
     else => private.socketpair,
 };
 
@@ -10775,11 +10775,10 @@ pub extern "c" fn recvfrom(
 ) if (native_os == .windows) c_int else isize;
 
 pub const recvmsg = switch (native_os) {
-    // Windows: Technically, a form of recvmsg() exists for Windows, but the
-    // user has to install some kind of callback for it.  I'm not sure if/how
-    // we can map this to normal recvmsg() interface use.
+    // Technically, a form of recvmsg() exists for Windows, but the user has to
+    // install some kind of callback for it.
     // https://learn.microsoft.com/en-us/windows/win32/api/mswsock/nc-mswsock-lpfn_wsarecvmsg
-    .windows => void,
+    .windows => {},
     else => private.recvmsg,
 };
 
@@ -11087,6 +11086,20 @@ pub extern "c" fn pthread_getthreadid_np() c_int;
 pub extern "c" fn pthread_set_name_np(thread: pthread_t, name: [*:0]const u8) void;
 pub extern "c" fn pthread_get_name_np(thread: pthread_t, name: [*:0]u8, len: usize) void;
 
+pub const TIMER = switch (native_os) {
+    .linux, .emscripten => std.os.linux.TIMER,
+    .openbsd, .netbsd, .wasi, .windows, .freebsd => packed struct(u32) {
+        ABSTIME: bool,
+        _: u31 = 0,
+    },
+    else => void,
+};
+
+pub const clock_nanosleep = switch (native_os) {
+    .linux, .emscripten, .netbsd, .wasi, .windows, .freebsd => private.clock_nanosleep,
+    else => {},
+};
+
 // OS-specific bits. These are protected from being used on the wrong OS by
 // comptime assertions inside each OS-specific file.
 
@@ -11476,6 +11489,7 @@ const private = struct {
     extern "c" fn gettimeofday(noalias tv: ?*timeval, noalias tz: ?*timezone) c_int;
     extern "c" fn msync(addr: *align(page_size) const anyopaque, len: usize, flags: c_int) c_int;
     extern "c" fn nanosleep(rqtp: *const timespec, rmtp: ?*timespec) c_int;
+    extern "c" fn clock_nanosleep(clockid: clockid_t, flags: TIMER, t: *const timespec, remain: ?*timespec) c_int;
     extern "c" fn pipe2(fds: *[2]fd_t, flags: O) c_int;
     extern "c" fn readdir(dir: *DIR) ?*dirent;
     extern "c" fn realpath(noalias file_name: [*:0]const u8, noalias resolved_name: [*]u8) ?[*:0]u8;