Initial endpoint macros.
This commit is contained in:
parent
b89ee5b188
commit
284dbccf65
23
include/minix/endpoint.h
Normal file
23
include/minix/endpoint.h
Normal file
|
@ -0,0 +1,23 @@
|
||||||
|
|
||||||
|
#ifndef _MINIX_ENDPOINT_H
|
||||||
|
#define _MINIX_ENDPOINT_H 1
|
||||||
|
|
||||||
|
#include <minix/sys_config.h>
|
||||||
|
#include <minix/com.h>
|
||||||
|
#include <limits.h>
|
||||||
|
|
||||||
|
/* The point of the padding in 'generation size' is to
|
||||||
|
* allow for certain bogus endpoint numbers such as NONE, ANY, etc.
|
||||||
|
* The 207 doesn't mean anything, it's just to make the actual endpoint
|
||||||
|
* numbers irregular.
|
||||||
|
*/
|
||||||
|
#define _ENDPOINT_MAX_PROC (_NR_PROCS + 207)
|
||||||
|
#define _ENDPOINT_GENERATION_SIZE (NR_TASKS+_ENDPOINT_MAX_PROC+1)
|
||||||
|
#define _ENDPOINT_MAX_GENERATION (INT_MAX/_ENDPOINT_GENERATION_SIZE-1)
|
||||||
|
|
||||||
|
/* Generation + Process slot number <-> endpoint. */
|
||||||
|
#define _ENDPOINT(g, p) ((g) * _ENDPOINT_GENERATION_SIZE + (p))
|
||||||
|
#define _ENDPOINT_G(e) (((e)+NR_TASKS) / _ENDPOINT_GENERATION_SIZE)
|
||||||
|
#define _ENDPOINT_P(e) ((((e)+NR_TASKS) % _ENDPOINT_GENERATION_SIZE) - NR_TASKS)
|
||||||
|
|
||||||
|
#endif
|
Loading…
Reference in a new issue