| 24 |
|
|
| 25 |
|
#include <errno.h> |
| 26 |
|
|
| 27 |
< |
extern int errno; |
| 27 |
> |
#ifndef BSD |
| 28 |
> |
#define bcopy(s,d,n) (void)memcpy(d,s,n) |
| 29 |
> |
#define bzero(d,n) (void)memset(d,0,n) |
| 30 |
> |
#endif |
| 31 |
|
|
| 32 |
|
#ifdef MSTATS |
| 33 |
|
#include <stdio.h> |
| 159 |
|
|
| 160 |
|
for ( ; ; ) { |
| 161 |
|
/* compact free lists */ |
| 162 |
< |
compactfree(); |
| 162 |
> |
while (compactfree()) |
| 163 |
> |
; |
| 164 |
|
/* find largest block */ |
| 165 |
|
tab = mtab(&cptab); tablen = mtablen(&cptab); |
| 166 |
|
big = tab; |
| 173 |
|
big->siz = 0; /* remove from table */ |
| 174 |
|
return(big->ptr); /* return it */ |
| 175 |
|
} |
| 176 |
< |
if (mtablen(big) < tablen+1) { |
| 176 |
> |
if (mtablen(big) <= tablen) { |
| 177 |
|
*np = 0; /* cannot grow table */ |
| 178 |
|
return(NULL); /* report failure */ |
| 179 |
|
} |
| 183 |
|
cptab.ptr = big->ptr; |
| 184 |
|
cptab.siz = big->siz; |
| 185 |
|
big->siz = 0; /* clear and copy */ |
| 182 |
– |
#ifdef BSD |
| 186 |
|
bcopy((char *)tab, (char *)(mtab(&cptab)+1), |
| 187 |
|
tablen*sizeof(struct mblk)); |
| 188 |
|
bzero((char *)(mtab(&cptab)+tablen+1), |
| 189 |
|
(mtablen(&cptab)-tablen-1)*sizeof(struct mblk)); |
| 187 |
– |
#else |
| 188 |
– |
(void)memcpy((char *)(mtab(&cptab)+1), (char *)tab, |
| 189 |
– |
tablen*sizeof(struct mblk)); |
| 190 |
– |
memset((char *)(mtab(&cptab)+tablen+1), 0, |
| 191 |
– |
(mtablen(&cptab)-tablen-1)*sizeof(struct mblk)); |
| 192 |
– |
#endif |
| 190 |
|
} /* next round */ |
| 191 |
|
} |
| 192 |
|
#endif /* MCOMP */ |
| 251 |
|
n = (n+(BYTES_WORD-1))&~(BYTES_WORD-1); /* word align rqst. */ |
| 252 |
|
|
| 253 |
|
if (n > nrem) { /* need more core */ |
| 254 |
+ |
tryagain: |
| 255 |
|
if (n > amnt) { /* big chunk */ |
| 256 |
|
thisamnt = (n+(pagesz-1))&~(pagesz-1); |
| 257 |
|
if (thisamnt <= MAXINCR) /* increase amnt */ |
| 260 |
|
thisamnt = amnt; |
| 261 |
|
p = sbrk(thisamnt); |
| 262 |
|
if ((int)p == -1) { /* uh-oh, ENOMEM */ |
| 263 |
< |
thisamnt = n; /* search free lists */ |
| 264 |
< |
p = mscrounge(&thisamnt); |
| 265 |
< |
if (p == NULL) /* we're really out */ |
| 263 |
> |
errno = 0; /* call cavalry */ |
| 264 |
> |
if (thisamnt >= n+pagesz) { |
| 265 |
> |
amnt = pagesz; /* minimize request */ |
| 266 |
> |
goto tryagain; |
| 267 |
> |
} |
| 268 |
> |
thisamnt = n; |
| 269 |
> |
p = mscrounge(&thisamnt); /* search free lists */ |
| 270 |
> |
if (p == NULL) { /* we're really out */ |
| 271 |
> |
errno = ENOMEM; |
| 272 |
|
return(NULL); |
| 273 |
+ |
} |
| 274 |
|
} |
| 275 |
|
#ifdef MSTATS |
| 276 |
|
else b_nsbrked += thisamnt; |
| 385 |
|
if ((p = malloc(n)) == NULL) |
| 386 |
|
return(n<=on ? op : NULL); |
| 387 |
|
if (on) { |
| 383 |
– |
#ifdef BSD |
| 388 |
|
bcopy(op, p, n>on ? on : n); |
| 385 |
– |
#else |
| 386 |
– |
(void)memcpy(p, op, n>on ? on : n); |
| 387 |
– |
#endif |
| 389 |
|
free(op); |
| 390 |
|
} |
| 391 |
|
return(p); |
