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std.Io.Threaded: stub out netbsd mutex and condition

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This commit is contained in:
Andrew Kelley 2025-10-27 22:16:03 -07:00
parent c0c2010535
commit 94b9874981
1 changed files with 6 additions and 0 deletions
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6
lib/std/Io/Threaded.zig
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@ -798,6 +798,7 @@ fn checkCancel(t: *Threaded) error{Canceled}!void {
fn mutexLock(userdata: ?*anyopaque, prev_state: Io.Mutex.State, mutex: *Io.Mutex) Io.Cancelable!void {
if (builtin.single_threaded) unreachable; // Interface should have prevented this.
if (native_os == .netbsd) @panic("TODO");
const t: *Threaded = @ptrCast(@alignCast(userdata));
if (prev_state == .contended) {
try futexWait(t, @ptrCast(&mutex.state), @intFromEnum(Io.Mutex.State.contended));
@ -809,6 +810,7 @@ fn mutexLock(userdata: ?*anyopaque, prev_state: Io.Mutex.State, mutex: *Io.Mutex
fn mutexLockUncancelable(userdata: ?*anyopaque, prev_state: Io.Mutex.State, mutex: *Io.Mutex) void {
if (builtin.single_threaded) unreachable; // Interface should have prevented this.
if (native_os == .netbsd) @panic("TODO");
_ = userdata;
if (prev_state == .contended) {
futexWaitUncancelable(@ptrCast(&mutex.state), @intFromEnum(Io.Mutex.State.contended));
@ -820,6 +822,7 @@ fn mutexLockUncancelable(userdata: ?*anyopaque, prev_state: Io.Mutex.State, mute
fn mutexUnlock(userdata: ?*anyopaque, prev_state: Io.Mutex.State, mutex: *Io.Mutex) void {
if (builtin.single_threaded) unreachable; // Interface should have prevented this.
if (native_os == .netbsd) @panic("TODO");
_ = userdata;
_ = prev_state;
if (@atomicRmw(Io.Mutex.State, &mutex.state, .Xchg, .unlocked, .release) == .contended) {
@ -829,6 +832,7 @@ fn mutexUnlock(userdata: ?*anyopaque, prev_state: Io.Mutex.State, mutex: *Io.Mut
fn conditionWaitUncancelable(userdata: ?*anyopaque, cond: *Io.Condition, mutex: *Io.Mutex) void {
if (builtin.single_threaded) unreachable; // Deadlock.
if (native_os == .netbsd) @panic("TODO");
const t: *Threaded = @ptrCast(@alignCast(userdata));
const t_io = ioBasic(t);
comptime assert(@TypeOf(cond.state) == u64);
@ -860,6 +864,7 @@ fn conditionWaitUncancelable(userdata: ?*anyopaque, cond: *Io.Condition, mutex:
fn conditionWait(userdata: ?*anyopaque, cond: *Io.Condition, mutex: *Io.Mutex) Io.Cancelable!void {
if (builtin.single_threaded) unreachable; // Deadlock.
if (native_os == .netbsd) @panic("TODO");
const t: *Threaded = @ptrCast(@alignCast(userdata));
const t_io = ioBasic(t);
comptime assert(@TypeOf(cond.state) == u64);
@ -960,6 +965,7 @@ fn conditionWake(userdata: ?*anyopaque, cond: *Io.Condition, wake: Io.Condition.
// - T2: UPDATE(&state, signal) + FUTEX_WAKE(&epoch)
// - T1: s & signals == 0 -> FUTEX_WAIT(&epoch, e) (missed both epoch change and state change)
_ = cond_epoch.fetchAdd(1, .release);
if (native_os == .netbsd) @panic("TODO");
futexWake(cond_epoch, to_wake);
return;
};