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#include <u.h>
#include <rt.h>
#define COUNT 32
static struct cleaner
{
struct cleaner *next;
void (*clean[COUNT])(void *);
void *arg[COUNT];
} arena, *head;
static int slot;
void weaklink exit(int code){};
void
rt·clean(void)
{
void (*clean)(void *), *arg;
/*LOCK*/
for(; head; head=head->next, slot=COUNT) {
while(slot-- > 0){
arg = head->arg[slot];
clean = head->clean[slot];
/* UNLOCK */
clean(arg);
/* LOCK */
}
}
}
int
rt·atexit(void (*clean)(void *), void *arg)
{
/* LOCK */
if(!head)
head = &arena;
/* we need malloc... */
if(slot==COUNT)
return -1;
head->arg[slot] = arg;
head->clean[slot] = clean;
slot++;
/* UNLOCK */
return 0;
}
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