1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
35  * Chris Kingsley, kingsley@cit-20.
40  * implementation, the available sizes are 2^n-4 (or 2^n-10) bytes long.
60  * Pre-allocate mmap'ed pages
100  * The array of supported page sizes is provided by the user, i.e., the
102  * the array before making its first call to allocate storage.  The array
110 	return (((caddr_t)cp - sizeof(union overhead)));  in cp2op()
132 	while (nbytes > amt - sizeof(*op)) {  in __crt_malloc()
148   	nextf[bucket] = op->ov_next;  in __crt_malloc()
149 	op->ov_magic = MAGIC;  in __crt_malloc()
150 	op->ov_index = bucket;  in __crt_malloc()
173 	void *mem, *ov;  in __crt_aligned_alloc_offset()  local
179 	offset &= align - 1;  in __crt_aligned_alloc_offset()
180 	mem = __crt_malloc(size + align + offset + sizeof(union overhead));  in __crt_aligned_alloc_offset()
181 	if (mem == NULL)  in __crt_aligned_alloc_offset()
183 	x = roundup2((uintptr_t)mem + sizeof(union overhead), align);  in __crt_aligned_alloc_offset()
187 	ov1.ov_index = x - (uintptr_t)mem + sizeof(union overhead);  in __crt_aligned_alloc_offset()
211 	if (amt > pagepool_end - pagepool_start)  in morecore()
224   	while (--nblks > 0) {  in morecore()
225 		op->ov_next = (union overhead *)((caddr_t)op + sz);  in morecore()
241 	op = op1.ov_magic == AMAGIC ? (void *)((caddr_t)cp - op1.ov_index) :  in __crt_free()
243 	if (op->ov_magic != MAGIC)  in __crt_free()
245   	size = op->ov_index;  in __crt_free()
246 	op->ov_next = nextf[size];	/* also clobbers ov_magic */  in __crt_free()
261 	if (op->ov_magic != MAGIC)  in __crt_realloc()
262 		return (NULL);	/* Double-free or bad argument */  in __crt_realloc()
263 	i = op->ov_index;  in __crt_realloc()
266 		onb -= sizeof(*op);  in __crt_realloc()
268 		onb += pagesz - sizeof(*op);  in __crt_realloc()
273 			i -= sizeof(*op);  in __crt_realloc()
275 			i += pagesz - sizeof(*op);  in __crt_realloc()
292 	if (pagepool_end - pagepool_start > pagesz) {  in morepages()
294 		if (munmap(addr, pagepool_end - addr) != 0) {  in morepages()
303 	offset = (uintptr_t)pagepool_start - rounddown2(  in morepages()
307 	    MAP_ANON | MAP_PRIVATE, -1, 0);  in morepages()