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#include "ruby/ruby.h"
#include "ruby/thread.h"
static void*
native_sleep_callback(void *data)
{
struct timeval *timeval = data;
select(0, NULL, NULL, NULL, timeval);
return NULL;
}
static VALUE
thread_runnable_sleep(VALUE thread, VALUE timeout)
{
struct timeval timeval;
if (NIL_P(timeout)) {
rb_raise(rb_eArgError, "timeout must be non nil");
}
timeval = rb_time_interval(timeout);
rb_thread_call_without_gvl(native_sleep_callback, &timeval, RUBY_UBF_IO, NULL);
return thread;
}
struct loop_ctl {
int notify_fd;
volatile int stop;
};
static void *
do_loop(void *p)
{
struct loop_ctl *ctl = p;
/* tell the waiting process they can interrupt us, now */
write(ctl->notify_fd, "", 1);
while (!ctl->stop) {
struct timeval tv = { 0, 10000 };
select(0, NULL, NULL, NULL, &tv);
}
return 0;
}
static void
stop_set(void *p)
{
struct loop_ctl *ctl = p;
ctl->stop = 1;
}
static VALUE
thread_ubf_async_safe(VALUE thread, VALUE notify_fd)
{
struct loop_ctl ctl;
ctl.notify_fd = NUM2INT(notify_fd);
ctl.stop = 0;
rb_nogvl(do_loop, &ctl, stop_set, &ctl, RB_NOGVL_UBF_ASYNC_SAFE);
return thread;
}
void
Init_call_without_gvl(void)
{
rb_define_method(rb_cThread, "__runnable_sleep__", thread_runnable_sleep, 1);
rb_define_method(rb_cThread, "__ubf_async_safe__", thread_ubf_async_safe, 1);
}
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