51 struct block {  struct
55 	struct block	*next;  argument
62 	struct block	block[1];  member
68 #define	HDR_BLOCK	(sizeof (struct block) - sizeof (void *))
109 		struct block	*block;  in defrag()  local
111 		for (block = page->block; block; block = block->next) {  in defrag()
112 			struct block	*block2;  in defrag()
114 			if (block->status == BUSY)  in defrag()
116 			for (block2 = block->next; block2 &&  in defrag()
118 				block->next = block2->next;  in defrag()
119 				block->size += block2->size + HDR_BLOCK;  in defrag()
135 split(struct block *block, size_t size)  in split()  argument
137 	if (block->size > size + sizeof (struct block)) {  in split()
138 		struct block	*newblock;  in split()
140 		newblock = (struct block *)  in split()
141 		    ((char *)block + HDR_BLOCK + size);  in split()
142 		newblock->next = block->next;  in split()
143 		block->next = newblock;  in split()
145 		newblock->page = block->page;  in split()
146 		newblock->size = block->size - size - HDR_BLOCK;  in split()
147 		block->size = size;  in split()
161 	struct block	*block;  in malloc()  local
170 		for (block = page->block; block; block = block->next) {  in malloc()
171 			if ((block->status == FREE) && (block->size >= size))  in malloc()
191 		block = page->block;  in malloc()
192 		block->next = 0;  in malloc()
193 		block->status = FREE;  in malloc()
194 		block->size = totpage - HDR_PAGE;  in malloc()
195 		block->page = page;  in malloc()
198 	split(block, size);  in malloc()
200 	scribble((ulong_t *)&block->memstart, NEWMEM, block->size);  in malloc()
202 	block->status = BUSY;  in malloc()
203 	return (&block->memstart);  in malloc()
233 	struct block	*block;  in realloc()  local
241 	block = (struct block *)((char *)ptr - HDR_BLOCK);  in realloc()
243 	osize = block->size;  in realloc()
248 	if (block->next && block->next->status == FREE) {  in realloc()
249 		block->size += block->next->size + HDR_BLOCK;  in realloc()
250 		block->next = block->next->next;  in realloc()
253 	if (size <= block->size) {  in realloc()
254 		split(block, size);  in realloc()
256 		if (block->size > osize)  in realloc()
258 			    (block->size - osize));  in realloc()
266 	block->status = FREE;  in realloc()
280 	(void) aplist_test(&free_alp, block->page, AL_CNT_FREELIST);  in realloc()
291 	struct block	*block;  in free()  local
297 	block = (struct block *)((char *)ptr - HDR_BLOCK);  in free()
298 	block->status = FREE;  in free()
300 	scribble((ulong_t *)&block->memstart, FREMEM, block->size);  in free()
302 	(void) aplist_test(&free_alp, block->page, AL_CNT_FREELIST);  in free()
319 	struct block	*block;  in addfree()  local
328 	block = page->block;  in addfree()
329 	block->next = 0;  in addfree()
330 	block->status = FREE;  in addfree()
331 	block->size = bytes - HDR_PAGE;  in addfree()
332 	block->page = page;  in addfree()