1 /*-
7  * is granted to deal in this work without restriction, including un-
28 /* build with CPPFLAGS+= -DUSE_REALLOC_MALLOC=0 on ancient systems */
48 	struct lalloc_item *lp = ptr;  in free_osimalloc()  local
50 	if (munmap(lp, lp->len))  in free_osimalloc()
57 	struct lalloc_item *lp, *lold = ptr;  in remalloc()  local
61 	if (lold && lold->len >= size)  in remalloc()
64 	if ((lp = mmap(NULL, size, PROT_READ | PROT_WRITE,  in remalloc()
65 	    MAP_ANON | MAP_PRIVATE, -1, (off_t)0)) == MAP_FAILED)  in remalloc()
67 	if (ALLOC_ISUNALIGNED(lp))  in remalloc()
68 		errx(1, "remalloc: unaligned(%p)", lp);  in remalloc()
69 	if (mprotect(((char *)lp) + 4096, 4096, PROT_NONE))  in remalloc()
71 	lp->len = size;  in remalloc()
74 		memcpy(((char *)lp) + 8192, ((char *)lold) + 8192,  in remalloc()
75 		    lold->len - 8192);  in remalloc()
76 		if (munmap(lold, lold->len))  in remalloc()
80 	return (lp);  in remalloc()
96 	ap->next = NULL;  in ainit()
102 	void *lp;  in findptr()  local
113 	*lpp = (lp = ptr - sizeof(ALLOC_ITEM));  in findptr()
115 	while (ap->next != lp)  in findptr()
116 		if ((ap = ap->next) == NULL) {  in findptr()
143 	struct lalloc_common *lp = NULL;  in aresize()  local
149 		pp = findptr(&lp, ptr, ap);  in aresize()
150 		pp->next = lp->next;  in aresize()
154 	    (lp = remalloc(lp, numb + sizeof(ALLOC_ITEM))) == NULL  in aresize()
156 	    || ALLOC_ISUNALIGNED(lp)  in aresize()
161 	lp->next = ap->next;  in aresize()
162 	ap->next = lp;  in aresize()
164 	return ((char *)lp + sizeof(ALLOC_ITEM));  in aresize()
171 		struct lalloc_common *lp, *pp;  in afree()  local
173 		pp = findptr(&lp, ptr, ap);  in afree()
175 		pp->next = lp->next;  in afree()
177 		free_osimalloc(lp);  in afree()
184 	struct lalloc_common *lp;  in afreeall()  local
187 	while ((lp = ap->next) != NULL) {  in afreeall()
189 		ap->next = lp->next;  in afreeall()
191 		free_osimalloc(lp);  in afreeall()