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build a thread library

This commit is contained in:
Jan-Erik Rediger 2024-05-28 12:40:52 +02:00
parent 5e40b05d95
commit 65d3f8260c
2 changed files with 61 additions and 34 deletions

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@ -1,45 +1,16 @@
use types::c;
use fmt;
use thread;
export type pthread_t = u64;
export type pthread_attr_t = opaque;
export type pthread_fn = fn(nullable *opaque) nullable *opaque;
export @symbol("pthread_create") fn pthread_create(thread: nullable *pthread_t, attr: nullable *pthread_attr_t, start_routine: *pthread_fn, arg: nullable *opaque) int;
export @symbol("pthread_join") fn pthread_join(thread: pthread_t, nullable *nullable *opaque) int;
fn thread_start(arg: nullable *opaque) nullable *opaque = {
fn thread_start() void = {
fmt::println("hello from another thread")!;
return null;
};
export fn main() void = {
fmt::println("starting a thread")!;
let tid: pthread_t = 0;
let ret = pthread_create(&tid, null, &thread_start, null);
fmt::printfln("ret: {}", ret)!;
let tid = thread::spawn(&thread_start)!;
fmt::println("joining")!;
ret = pthread_join(tid, null);
fmt::printfln("ret: {}", ret)!;
};
// spawn a thread
//
// returns a handle or an error
fn spawn(f: *pthread_fn) (join_handle | error) = {
void;
};
// join a thread
//
// no return value or an error on join
fn join(handle: join_handle) (void | error) = {
void;
};
// detach a thread.
fn detach(join_handle) (void | error) = {
void;
thread::join(tid)!;
fmt::println("joined. good bye.")!;
};

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@ -0,0 +1,56 @@
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;
};
};