55 lines
2 KiB
C
Executable file
55 lines
2 KiB
C
Executable file
/* General macros and constants used by the kernel. */
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#ifndef CONST_H
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#define CONST_H
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#include <minix/config.h>
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#include <minix/bitmap.h>
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#include "config.h"
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#include "debug.h"
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/* Map a process number to a privilege structure id. */
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#define s_nr_to_id(n) (NR_TASKS + (n) + 1)
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/* Translate a pointer to a field in a structure to a pointer to the structure
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* itself. So it translates '&struct_ptr->field' back to 'struct_ptr'.
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*/
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#define structof(type, field, ptr) \
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((type *) (((char *) (ptr)) - offsetof(type, field)))
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/* Translate an endpoint number to a process number, return success. */
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#define isokendpt(e,p) isokendpt_d((e),(p),0)
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#define okendpt(e,p) isokendpt_d((e),(p),1)
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/* Constants used in virtual_copy(). Values must be 0 and 1, respectively. */
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#define _SRC_ 0
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#define _DST_ 1
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/* Number of random sources */
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#define RANDOM_SOURCES 16
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#define get_sys_bit(map,bit) \
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( MAP_CHUNK(map.chunk,bit) & (1 << CHUNK_OFFSET(bit) )
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#define get_sys_bits(map,bit) \
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( MAP_CHUNK(map.chunk,bit) )
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#define set_sys_bit(map,bit) \
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( MAP_CHUNK(map.chunk,bit) |= (1 << CHUNK_OFFSET(bit) )
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#define unset_sys_bit(map,bit) \
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( MAP_CHUNK(map.chunk,bit) &= ~(1 << CHUNK_OFFSET(bit) )
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#define NR_SYS_CHUNKS BITMAP_CHUNKS(NR_SYS_PROCS)
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#define reallock do { int d; d = intr_disabled(); intr_disable(); locklevel++; if(d && locklevel == 1) { minix_panic("reallock while interrupts disabled first time", __LINE__); } } while(0)
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#define realunlock do { if(!intr_disabled()) { minix_panic("realunlock while interrupts enabled", __LINE__); } if(locklevel < 1) { minix_panic("realunlock while locklevel below 1", __LINE__); } locklevel--; if(locklevel == 0) { intr_enable(); } } while(0)
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/* Disable/ enable hardware interrupts. The parameters of lock() and unlock()
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* are used when debugging is enabled. See debug.h for more information.
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*/
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#define lock reallock
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#define unlock realunlock
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/* args to intr_init() */
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#define INTS_ORIG 0 /* restore interrupts */
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#define INTS_MINIX 1 /* initialize interrupts for minix */
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#endif /* CONST_H */
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