util.c

#include "util.h"

void raise_exception(exception_context context)
{
	if(*context) {
		__atomic_signal_fence(__ATOMIC_SEQ_CST);
		longjmp((*context)->jbuf, 1);
	}
}


void exception_unwind(exception_context context, int errcode)
{
	/* Get the top frame */
	struct exception_stack_frame* frame = *context;

	/* handle exception */
	int captured = 0;

	/* First execute catchers one by one */
	while(frame->catchers) {
		captured = 1;
		struct exception_handler_frame *c = frame->catchers;
		/* Pop it from the list, just in case it throws() */
		frame->catchers = c->next;
		c->handler(errcode);
	}

	/* Execute finalizers one by one */
	while(frame->finalizers) {
		struct exception_handler_frame *fin = frame->finalizers;
		frame->finalizers = fin->next;

		fin->handler(errcode);
	}
 	
	/* pop this frame */
	*context = frame->next;

 	/* propagate */
	if(errcode && !captured) 
		raise_exception(context);
}