Return to av_files.c CVS log

Up to [CSRG BSD Unix] / 42BSD / ingres / source / ctlmod

Annotation of 42BSD/ingres/source/ctlmod/av_files.c, revision 1.1.1.1

1.1       root        1: # include      <ingres.h>
                      2: # include      <aux.h>
                      3: # include      <opsys.h>
                      4: # include      "ctlmod.h"
                      5: # include      <sccs.h>
                      6: 
                      7: SCCSID(@(#)av_files.c  7.1     2/5/81)
                      8: 
                      9: /*
                     10: **  AV_FILES -- return number of files available for user files.
                     11: **
                     12: **     Takes NOFILE and reduces it by the number of files that are
                     13: **     open or could be open (for the catalog descriptors).
                     14: **
                     15: **     Parameters:
                     16: **             none.
                     17: **
                     18: **     Returns:
                     19: **             the number of available file descriptor to play with.
                     20: **
                     21: **     Side Effects:
                     22: **             none.
                     23: */
                     24: 
                     25: extern struct desxx    Desxx[];
                     26: 
                     27: av_files()
                     28: {
                     29:        auto long               fopn;
                     30:        register int            nopn;
                     31:        register int            i;
                     32:        register struct desxx   *p;
                     33: 
                     34:        markopen(&fopn);
                     35:        nopn = 0;
                     36:        for (i = 0; i < 32; i++)
                     37:        {
                     38:                if (bitset(1 << i, fopn))
                     39:                        nopn++;
                     40:        }
                     41: 
                     42:        /* now scan the descriptor cache */
                     43:        for (p = Desxx; p->cach_relname != NULL; p++)
                     44:        {
                     45:                if (p->cach_alias != NULL)
                     46:                        continue;
                     47:                if (p->cach_desc->relopn == 0)
                     48:                        nopn++;
                     49:        }
                     50: 
                     51:        return (NOFILE - nopn);
                     52: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.