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#include "autod.h"
#include <stdio.h>
void do_autod_register(AutodRegistryNode *head, void **ptr,
autod_destructor_t destr) {
AutodRegistryNode *newnode = (AutodRegistryNode*)
malloc(sizeof(AutodRegistryNode));
newnode->ptr = ptr;
newnode->destructor = destr;
newnode->next = head->next;
head->next = newnode;
*(ptr) = 0; /* zero the pointer to make sure it doesn't contain
* garbage */
}
void do_autod_assign(AutodRegistryNode *head, void **ptr, void *newvalue) {
AutodRegistryNode *n;
if (*ptr) {
/* destroy previous value before attributing a new value; for that,
* we must look for the corresponding node in the registry */
n = head->next;
while (n) {
if (n->ptr == ptr) {
/* got it, call destructor */
(*(n->destructor))(*ptr);
break;
}
}
if (!n) {
/* not found: abort */
fprintf(stderr, "autod: FATAL ERROR: attempt to assign to\n"
"unregistered pointer.\n\n");
abort();
}
}
/* we are clear to assign a new value */
*ptr = newvalue;
}
void do_autod_cleanup(AutodRegistryNode *head, void *ignore_ptr) {
AutodRegistryNode *n = head->next;
AutodRegistryNode *next;
while (n) {
if (*(n->ptr) && *(n->ptr) != ignore_ptr)
(*(n->destructor))(*(n->ptr)); /* call destructor */
next = n->next;
free(n); /* free the node */
n = next; /* advance to next */
}
}
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