The mac_alloc() and mac_free() Functions

mac_register_t *mac_alloc(uint_t version);

The mac_alloc(9F) function allocates a new mac_register structure and returns a pointer to it. Initialize the structure members before you pass the new structure to mac_register(). MAC-private elements are initialized by the MAC layer before mac_alloc() returns. The value of version must be MAC_VERSION_V1.

void mac_free(mac_register_t *mregp);

The mac_free(9F) function frees a mac_register structure that was previously allocated by mac_alloc().