1993/0501/ss/bbmalloc.c (diff list | history)

1992/0711/sys/src/9/ss/bbmalloc.c:1,54 – 1993/0501/sys/src/9/ss/bbmalloc.c:0 (short | long | prev)
Deleted. rsc Mon Mar 7 10:33:04 2005
1991/0723		#include "u.h"
1992/0321		#include "../port/lib.h"
1991/0723		#include "mem.h" #include "dat.h" #include "fns.h" #include "io.h"                  /* * Allocate memory for use in kernel bitblts. */                  /* a 0->3 bitblt can take 900 words */ enum { nbbarena=8192 /* number of words in an arena */ };                  static ulong bbarena[nbbarena]; static ulong *bbcur = bbarena; static ulong *bblast = 0;                  void * bbmalloc(int nbytes) { int nw; int s; ulong *ans;                  nw = nbytes/sizeof(long); s = splhi(); if(bbcur + nw > &bbarena[nbbarena]) ans = bbarena; else ans = bbcur; bbcur = ans + nw; splx(s); bblast = ans; ans = (void *)ans; return ans; }                  void bbfree(void *p, int n) { if(p == bblast) bbcur = (ulong *)(((char *)bblast) + n); }
1992/0116		int bbonstack(void)
1991/0723		{
1992/0116		if(u) return 1; return 0;
1991/0723		}