sys/src/libbio/bflush.c

   1 #include        <u.h>
   2 #include        <libc.h>
   3 #include        <bio.h>
   4
   5 int
   6 Bflush(Biobufhdr *bp)
   7 {
   8         int n, c;
   9
  10         switch(bp->state) {
  11         case Bwactive:
  12                 n = bp->bsize+bp->ocount;
  13                 if(n == 0)
  14                         return 0;
  15                 c = write(bp->fid, bp->bbuf, n);
  16                 if(n == c) {
  17                         bp->offset += n;
  18                         bp->ocount = -bp->bsize;
  19                         return 0;
  20                 }
  21                 bp->state = Binactive;
  22                 bp->ocount = 0;
  23                 Berror(bp, "write error: %r");
  24                 break;
  25
  26         case Bracteof:
  27                 bp->state = Bractive;
  28
  29         case Bractive:
  30                 bp->icount = 0;
  31                 bp->gbuf = bp->ebuf;
  32                 return 0;
  33         }
  34         return Beof;
  35 }