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hare-playground/backend/vendor/hare-thread/thread/thread.ha

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2024-05-28 10:40:52 +00:00
use types::c;
export type pthread_t = [8]u8;
type pthread_attr_t = opaque;
type pthread_fn = fn(nullable *opaque) nullable *opaque;
export type thread_fn = fn() void;
@symbol("pthread_create") fn pthread_create(thread: nullable *pthread_t, attr: nullable *pthread_attr_t, start_routine: *pthread_fn, arg: nullable *opaque) int;
@symbol("pthread_join") fn pthread_join(thread: pthread_t, nullable *nullable *opaque) int;
@symbol("pthread_detach") fn pthread_detach(thread: pthread_t) int;
fn thread_spawn_wrapper(data: nullable *opaque) nullable *opaque = {
let f = data: *thread_fn;
f();
return null;
};
export type error = !void;
export type join_handle = struct {
thread: pthread_t,
};
// spawn a thread
//
// returns a handle or an error
export fn spawn(f: *thread_fn) (join_handle | error) = {
let data = f: *opaque;
let tid: pthread_t = [0...];
let ret = pthread_create(&tid, null, &thread_spawn_wrapper, f);
if (ret != 0) {
return error;
};
return join_handle {
thread = tid
};
};
// join a thread
//
// no return value or an error on join
export fn join(handle: join_handle) (void | error) = {
let ret = pthread_join(handle.thread, null);
if (ret != 0) {
return error;
};
};
// detach a thread.
export fn detach(handle: join_handle) (void | error) = {
let ret = pthread_detach(handle.thread);
if (ret != 0) {
return error;
};
};