Lines Matching defs:ppref

82 #define PPREF_NONE ((int *) -1)	/* not using ppref */
184  * what is ppref?   ppref is an _optional_ amap feature which is used
193  * that we tried to do ppref's but couldn't alloc the array so just
204  *       ppref: -3  4  x  x  4 -2  2 -1  3  x -5  2  1 -2  3  x
219  * => ppref's amap must be locked
222 pp_getreflen(int *ppref, int offset, int *refp, int *lenp)
225 	if (ppref[offset] > 0) {		/* chunk size must be 1 */
226 		*refp = ppref[offset] - 1;	/* don't forget to adjust */
229 		*refp = (ppref[offset] * -1) - 1;
230 		*lenp = ppref[offset+1];
237  * => ppref's amap must be locked
240 pp_setreflen(int *ppref, int offset, int ref, int len)
243 		ppref[offset] = ref + 1;
245 		ppref[offset] = (ref + 1) * -1;
246 		ppref[offset+1] = len;
858 	/* Establish ppref before we add a duplicate reference to the amap. */
873  * amap_pp_establish: add a ppref array to an amap, if possible.
886 		/* Failure - just do not use ppref. */
898  * => caller must check that ppref != PPREF_NONE before calling.
904  	int stopslot, *ppref, lcv, prevlcv;
910 	ppref = amap->am_ppref;
917 		pp_getreflen(ppref, lcv, &ref, &len);
919 			pp_setreflen(ppref, lcv, ref, curslot - lcv);
920 			pp_setreflen(ppref, curslot, ref, len - (curslot -lcv));
926 		pp_getreflen(ppref, prevlcv, &prevref, &prevlen);
931 		 * the ppref array; that is, there is no previous chunk.
945 		pp_getreflen(ppref, lcv, &ref, &len);
947 			pp_setreflen(ppref, lcv, ref, stopslot - lcv);
948 			pp_setreflen(ppref, stopslot, ref,
956 			pp_setreflen(ppref, prevlcv, ref, prevlen + len);
958 			pp_setreflen(ppref, lcv, ref, len);
1310 	 * We must establish the ppref array before changing am_ref
1311 	 * so that the ppref values match the current amap refcount.