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refactor pic_push_try. use raw continuation API

This commit is contained in:
Yuichi Nishiwaki 2014-09-24 15:35:00 +09:00
parent e38732995e
commit c7c771c861
1 changed files with 26 additions and 28 deletions
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54
error.c
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@ -85,39 +85,37 @@ native_exception_handler(pic_state *pic)
UNREACHABLE(); UNREACHABLE();
} }
static pic_value
native_push_try(pic_state *pic)
{
struct pic_proc *cont, *handler;
size_t xp_len, xp_offset;
pic_get_args(pic, "l", &cont);
handler = pic_make_proc(pic, native_exception_handler, "(native-exception-handler)");
pic_attr_set(pic, handler, "@@escape", pic_obj_value(cont));
if (pic->xp >= pic->xpend) {
xp_len = (pic->xpend - pic->xpbase) * 2;
xp_offset = pic->xp - pic->xpbase;
pic->xpbase = pic_realloc(pic, pic->xpbase, sizeof(struct pic_proc *) * xp_len);
pic->xp = pic->xpbase + xp_offset;
pic->xpend = pic->xpbase + xp_len;
}
*pic->xp++ = handler;
return pic_true_value();
}
bool bool
pic_push_try(pic_state *pic) pic_push_try(pic_state *pic)
{ {
pic_value val; struct pic_escape *escape;
val = pic_escape(pic, pic_make_proc(pic, native_push_try, "(native-push-try)")); escape = pic_alloc(pic, sizeof(struct pic_escape));
return pic_test(val); if (pic_save_point(pic, escape)) {
return false;
} else {
struct pic_proc *cont, *handler;
size_t xp_len, xp_offset;
cont = pic_make_cont(pic, escape);
handler = pic_make_proc(pic, native_exception_handler, "(native-exception-handler)");
pic_attr_set(pic, handler, "@@escape", pic_obj_value(cont));
if (pic->xp >= pic->xpend) {
xp_len = (pic->xpend - pic->xpbase) * 2;
xp_offset = pic->xp - pic->xpbase;
pic->xpbase = pic_realloc(pic, pic->xpbase, sizeof(struct pic_proc *) * xp_len);
pic->xp = pic->xpbase + xp_offset;
pic->xpend = pic->xpbase + xp_len;
}
*pic->xp++ = handler;
return true;
}
} }
void void