sk_delete_ptr
(type *)sk_delete_ptr(CHECKED_STACK_OF(type, st), CHECKED_PTR_OF(type, ptr))
#define sk_OPENSSL_STRING_delete_ptr(st, ptr) (OPENSSL_STRING *)sk_delete_ptr(CHECKED_STACK_OF(OPENSSL_STRING, st), CHECKED_PTR_OF(char, ptr))
#define sk_OPENSSL_BLOCK_delete_ptr(st, ptr) (OPENSSL_BLOCK *)sk_delete_ptr(CHECKED_STACK_OF(OPENSSL_BLOCK, st), CHECKED_PTR_OF(void, ptr))
#define sk_OPENSSL_PSTRING_delete_ptr(st, ptr) (OPENSSL_PSTRING *)sk_delete_ptr(CHECKED_STACK_OF(OPENSSL_PSTRING, st), CHECKED_PTR_OF(OPENSSL_STRING, ptr))
void *sk_delete_ptr(_STACK *st, void *p);