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adapted to the system(3L) interface

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This commit is contained in:
erikb
1986-03-25 10:39:23 +00:00
parent 0e39681621
commit 1afbf0e20f
12 changed files with 137 additions and 140 deletions
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22
lang/cem/cemcom/alloc.c
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@@ -23,21 +23,19 @@
Salloc(str, sz) : save string in malloc storage
*/
#include <system.h>
#include "myalloc.h" /* UF */
#include "debug.h" /* UF */
#include "alloc.h"
#include "assert.h"
#include "system.h"
#ifdef OWNALLOC
#define SBRK_ERROR ((char *) -1) /* errors during allocation */
char *sys_break();
/* the following variables are used for book-keeping */
static int nfreebytes = 0; /* # free bytes in sys_sbrk-ed space */
static int nfreebytes = 0; /* # free bytes in sys_break space */
static char *freeb; /* pointer to first free byte */
static char *lastalloc; /* pointer to last malloced sp */
static char *lastalloc; /* pointer to last malloced sp */
static int lastnbytes; /* nr of bytes in last allocated */
/* space */
static char *firstfreeb = 0;
@@ -75,11 +73,11 @@ malloc(n)
register nbts = (n <= ALLOCSIZ) ? ALLOCSIZ : n;
if (!nfreebytes) {
if ((freeb = sys_sbrk(nbts)) == SBRK_ERROR)
if ((freeb = sys_break(nbts)) == ILL_BREAK)
fatal("out of memory");
}
else {
if (sys_sbrk(nbts) == SBRK_ERROR)
if (sys_break(nbts) == ILL_BREAK)
fatal("out of memory");
}
nfreebytes += nbts;
@@ -118,7 +116,7 @@ realloc(ptr, n)
nbytes = ALIGN(nbytes);
if (nfreebytes < nbytes) {
register int nbts = (nbytes < ALLOCSIZ) ? ALLOCSIZ : nbytes;
if (sys_sbrk(nbts) == SBRK_ERROR)
if (sys_break(nbts) == ILL_BREAK)
fatal("out of memory");
nfreebytes += nbts;
}
@@ -136,13 +134,13 @@ free(p)
init_mem()
{
firstfreeb = sys_sbrk(0);
firstfreeb = sys_break(0);
/* align the first memory unit to ALIGNSIZE ??? */
if ((long) firstfreeb % ALIGNSIZE != 0) {
register char *fb = firstfreeb;
fb = (char *)ALIGN((long)fb);
firstfreeb = sys_sbrk(fb - firstfreeb);
firstfreeb = sys_break(fb - firstfreeb);
firstfreeb = fb;
ASSERT((long)firstfreeb % ALIGNSIZE == 0);
}
@@ -155,7 +153,7 @@ mem_stat()
if (options['m'])
printf("Total nr of bytes allocated: %d\n",
sys_sbrk(0) - firstfreeb);
sys_break(0) - firstfreeb);
}
#endif DEBUG
#endif OWNALLOC