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81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/* i/n/e.h
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**
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** This file is in the public domain.
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*/
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/** Data structures.
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**/
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/* u3e_line: control line.
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*/
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typedef struct _u3e_line {
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c3_w pag_w;
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c3_w mug_w;
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} u3e_line;
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/* u3e_control: memory change, control file.
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*/
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typedef struct _u3e_control {
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c3_d evt_d; // event number
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c3_w nor_w; // new page count north
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c3_w sou_w; // new page count south
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c3_w pgs_w; // number of changed pages
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u3e_line mem_u[0]; // per page
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} u3e_control;
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/* u3_cs_patch: memory change, top level.
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*/
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typedef struct _u3_cs_patch {
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c3_i ctl_i;
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c3_i mem_i;
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u3e_control* con_u;
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} u3_ce_patch;
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/* u3e_image: memory segment, open file.
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*/
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typedef struct _u3e_image {
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c3_c* nam_c; // segment name
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c3_i fid_i; // open file, or 0
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c3_w pgs_w; // length in pages
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} u3e_image;
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/* u3e_pool: entire memory system.
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*/
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typedef struct _u3e_pool {
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c3_c* dir_c; // path to
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c3_d evt_d; // last patch written at event
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c3_w dit_w[u3a_pages >> 5]; // touched since last save
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u3e_image nor_u; // north segment
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u3e_image sou_u; // south segment
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} u3e_pool;
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/** Globals.
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**/
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/* u3_Pool / u3P: global memory control.
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*/
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c3_global u3e_pool u3e_Pool;
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# define u3P u3e_Pool
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/** Functions.
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**/
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/* u3e_fault(): handle a memory event with libsigsegv protocol.
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*/
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c3_i
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u3e_fault(void* adr_v, c3_i ser_i);
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/* u3e_save():
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*/
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void
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u3e_save(void);
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/* u3e_live(): start the persistence system. Return c3y if no image.
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*/
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c3_o
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u3e_live(c3_o nuu_o, c3_c* dir_c);
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/* u3e_dirty(): count dirty pages.
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*/
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c3_w
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u3e_dirty(void);
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