77c3213948
and NEW_SCHED_Q definitions. Some minor problems are being traced at the moment. This commit is meant to backup my files. --- Jorrit
145 lines
4.1 KiB
C
Executable file
145 lines
4.1 KiB
C
Executable file
/* This file contains a collection of miscellaneous procedures:
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* panic abort MINIX due to a fatal error
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* bad_assertion for debugging
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* bad_compare for debugging
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* alloc_bit bit map manipulation
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* free_bit bit map manipulation
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* print_bitmap bit map manipulation
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*/
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#include "kernel.h"
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#include "assert.h"
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#include <unistd.h>
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#include <minix/com.h>
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/*===========================================================================*
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* panic *
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*===========================================================================*/
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PUBLIC void panic(s,n)
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_CONST char *s;
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int n;
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{
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/* The system has run aground of a fatal error. Terminate execution.
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* If the panic originated in MM or FS, the string will be empty and the
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* file system already syncked. If the panic originates in the kernel, we are
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* kind of stuck.
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*/
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static int panicking = 0;
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if (panicking ++) /* prevent recursive panics */
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return;
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if (s != NULL) {
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kprintf("\nKernel panic: %s", karg(s));
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if (n != NO_NUM) kprintf(" %d", n);
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kprintf("\n",NO_ARG);
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}
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prepare_shutdown(RBT_PANIC);
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}
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#if ENABLE_K_DEBUGGING
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/*===========================================================================*
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* print_bitmap *
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*===========================================================================*/
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PUBLIC void print_bitmap(bitmap, nr_bits)
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bitchunk_t *bitmap;
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bit_t nr_bits;
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{
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bit_t bit_i;
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for (bit_i=0; bit_i < nr_bits; bit_i++) {
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kprintf("%d", GET_BIT(bitmap, bit_i) > 0 );
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if (! ((bit_i+1) % 8) ) kprintf(" ", NO_ARG);
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if (! ((bit_i+1) % 64) ) kprintf("\n", NO_ARG);
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}
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kprintf("\n", NO_ARG);
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}
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#endif /* ENABLE_K_DEBUGGING */
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/*===========================================================================*
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* free_bit *
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*===========================================================================*/
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PUBLIC void free_bit(bit_nr, bitmap, nr_bits)
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bit_t bit_nr;
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bitchunk_t *bitmap;
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bit_t nr_bits;
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{
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bitchunk_t *chunk;
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if (bit_nr >= nr_bits) {
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kprintf("Warning, free_bit: %d illegal index\n", bit_nr);
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return;
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}
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chunk = &bitmap[(bit_nr/BITCHUNK_BITS)];
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*chunk &= ~(1 << (bit_nr % BITCHUNK_BITS));
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}
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/*===========================================================================*
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* alloc_bit *
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*===========================================================================*/
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PUBLIC int alloc_bit(bitmap, nr_bits)
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bitchunk_t *bitmap;
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bit_t nr_bits;
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{
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bitchunk_t *chunk;
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int nr_chunks;
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int bit_nr;
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int i;
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/* Iterate over the words in block. */
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nr_chunks = BITMAP_CHUNKS(nr_bits);
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for (chunk = &bitmap[0]; chunk < &bitmap[nr_chunks]; chunk++) {
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/* Does this chunk contain a free bit? */
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if (*chunk == (bitchunk_t) ~0) continue;
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/* Get bit number from the start of the bit map. */
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for (i = 0; (*chunk & (1 << i)) != 0; ++i) {}
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bit_nr = (chunk - &bitmap[0]) * BITCHUNK_BITS + i;
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/* Don't allocate bits beyond the end of the map. */
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if (bit_nr >= nr_bits) break;
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*chunk |= 1 << bit_nr % BITCHUNK_BITS;
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return(bit_nr);
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}
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return(-1);
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}
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#if !NDEBUG
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/*=========================================================================*
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* bad_assertion *
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*=========================================================================*/
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PUBLIC void bad_assertion(file, line, what)
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char *file;
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int line;
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char *what;
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{
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kprintf("panic at %s", karg(file));
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kprintf(" (line %d): ", line);
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kprintf("assertion \"%s\" failed.\n", karg(what));
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panic(NULL, NO_NUM);
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}
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/*=========================================================================*
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* bad_compare *
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*=========================================================================*/
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PUBLIC void bad_compare(file, line, lhs, what, rhs)
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char *file;
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int line;
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int lhs;
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char *what;
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int rhs;
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{
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kprintf("panic at %s", karg(file));
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kprintf(" (line %d): ", line);
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kprintf("compare (%d)", lhs);
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kprintf(" %s ", karg(what));
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kprintf("(%d) failed.\n", rhs);
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panic(NULL, NO_NUM);
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}
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#endif /* !NDEBUG */
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