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u3: adds comments to explain unusual u3v_arvo/u3v_home requirements

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This commit is contained in:
Joe Bryan 2020-12-04 15:21:45 -08:00
parent f2a2d174e9
commit fd59a75926
1 changed files with 3 additions and 1 deletions
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4
pkg/urbit/include/noun/vortex.h
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@ -5,6 +5,7 @@
/** Data structures.
**/
/* u3v_arvo: modern arvo structure.
** NB: packed to perserve word alignment given [eve_d]
*/
typedef struct __attribute__((__packed__)) _u3v_arvo {
c3_d eve_d; // event number
@ -14,11 +15,12 @@
} u3v_arvo;
/* u3v_home: all internal (within image) state.
** NB: version must be last for discriminability in north road
*/
typedef struct _u3v_home {
u3a_road rod_u; // storage state
u3v_arvo arv_u; // arvo state
c3_w ver_w; // version number XX s/b first
c3_w ver_w; // version number
} u3v_home;