typedef struct PK_SESSION_frustrum_s
    {
    --- macro PK_SESSION_frustrum_o_m initialises all of these fields to NULL
    PK_FSTART_f_t fstart;
    PK_FABORT_f_t fabort;
    PK_FSTOP_f_t  fstop;
    PK_FMALLO_f_t fmallo;
    PK_FMFREE_f_t fmfree;
    PK_GOSGMT_f_t gosgmt;
    PK_GOOPSG_f_t goopsg;
    PK_GOCLSG_f_t goclsg;
    PK_GOPIXL_f_t gopixl;
    PK_GOOPPX_f_t gooppx;
    PK_GOCLPX_f_t goclpx;
    PK_FFOPRD_f_t ffoprd;
    PK_FFOPWR_f_t ffopwr;
    PK_FFCLOS_f_t ffclos;
    PK_FFREAD_f_t ffread;
    PK_FFWRIT_f_t ffwrit;
    PK_FFOPRB_f_t ffoprb;
    PK_FFSEEK_f_t ffseek;
    PK_FFTELL_f_t fftell;
    PK_FGCRCU_f_t fgcrcu;
    PK_FGCRSU_f_t fgcrsu;
    PK_FGEVCU_f_t fgevcu;
    PK_FGEVSU_f_t fgevsu;
    PK_FGPRCU_f_t fgprcu;
    PK_FGPRSU_f_t fgprsu;
    PK_UCOPRD_f_t ucoprd;
    PK_UCOPWR_f_t ucopwr;
    }
    PK_SESSION_frustrum_t;



This data structure holds pointers to the functions the application
wishes to register with the PK using PK_SESSION_register_frustrum.

The structure can be initialised with the PK_SESSION_frustrum_o_m macro.