urbit/include/g/e.h
2014-11-04 16:29:08 -08:00

91 lines
2.4 KiB
C

/* include/g/e.h
**
** This file is in the public domain.
*/
/** Data structures.
**/
/* u3_cs_line: control line.
*/
typedef struct _u3_cs_line {
c3_w pag_w;
c3_w mug_w;
} u3_cs_line;
/* u3_cs_control: memory change, control file.
*/
typedef struct _u3_cs_control {
c3_d evt_d; // event number
c3_w nor_w; // new page count north
c3_w sou_w; // new page count south
c3_w pgs_w; // number of changed pages
u3_cs_line mem_u[0]; // per page
} u3_cs_control;
/* u3_cs_patch: memory change, top level.
*/
typedef struct _u3_cs_patch {
c3_i ctl_i;
c3_i mem_i;
u3_cs_control* con_u;
} u3_cs_patch;
/* u3_cs_image: memory segment, open file.
*/
typedef struct _u3_cs_image {
c3_c* nam_c; // segment name
c3_i fid_i; // open file, or 0
c3_w pgs_w; // length in pages
} u3_cs_image;
/* u3_cs_pool: entire memory system.
*/
typedef struct _u3_cs_pool {
c3_c* cpu_c; // path to
c3_d evt_d; // last patch written at event
c3_w dit_w[u3_cc_pages >> 5]; // touched since last save
u3_cs_image nor_u; // north segment
u3_cs_image sou_u; // south segment
} u3_cs_pool;
/** Globals.
**/
/* u3_Pool / u3P: global memory control.
*/
c3_global u3_cs_pool u3_Pool;
# define u3P u3_Pool
/** Functions.
**/
/* u3_ce_fault(): handle a memory event with libsigsegv protocol.
*/
c3_i
u3_ce_fault(void* adr_v, c3_i ser_i);
/* u3_ce_save():
*/
void
u3_ce_save(void);
/* u3_ce_boot(): start the memory system.
*/
void
u3_ce_boot(c3_o nuu_o, c3_o bug_o, c3_c* cpu_c);
/* u3_ce_init(): start the environment, with/without checkpointing.
*/
void
u3_ce_init(c3_o chk_o);
/* u3_ce_grab(): garbage-collect the world, plus extra roots.
*/
void
u3_ce_grab(c3_c* cap_c, u3_noun som, ...); // terminate with u3_none
/* u3_ce_dirty(): count dirty pages.
*/
c3_w
u3_ce_dirty(void);