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# This is a coroutine library that uses libaco. If you don't have it installed,
# you can get it from the website: https://libaco.org
#
# Lua programmers will recognize this as similar to Lua's stackful coroutines.
#
# Async/Await programmers will weep at its beauty and gnash their teeth and
# rend their garments in despair at what they could have had.
use libaco.so
use <aco.h>
func main():
!! Example usage:
co := new(func():
say("I'm in the coroutine!")
yield()
say("I'm back in the coroutine!")
)
>> co
say("I'm in the main func")
>> co:resume()
say("I'm back in the main func")
>> co:resume()
say("I'm back in the main func again")
>> co:resume()
_main_co := !@Memory
_shared_stack := !@Memory
struct Coroutine(co:@Memory):
func is_finished(co:Coroutine; inline)->Bool:
return inline C:Bool {((aco_t*)$co.$co)->is_finished}
func resume(co:Coroutine)->Bool:
if co:is_finished():
return no
inline C { aco_resume($co.$co); }
return yes
func _init():
inline C {
aco_set_allocator(GC_malloc, NULL);
aco_thread_init(aco_exit_fn);
}
_main_co = inline C:@Memory { aco_create(NULL, NULL, 0, NULL, NULL) }
_shared_stack = inline C:@Memory { aco_shared_stack_new(0) }
func new(co:func())->Coroutine:
if not _main_co:
_init()
main_co := _main_co
shared_stack := _shared_stack
aco_ptr := inline C:@Memory {
aco_create($main_co, $shared_stack, 0, (void*)$co.fn, $co.userdata)
}
return Coroutine(aco_ptr)
func yield(; inline):
inline C {
aco_yield();
}
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