1990/08272/port/stream.c (diff list | history)

1990/0801/sys/src/9/port/stream.c:48,53 – 1990/08272/sys/src/9/port/stream.c:48,58 (short | long | prev | next)
1990/0227		/* * The block classes. There are Nclass block sizes, each with its own free list. * All are ialloced at qinit() time.
1990/08272		* * NOTE: to help the mappings on the IO2 and IO3 boards, the data pointed * to by a block must not cross a 4k boundary. Therefore: * 1) all the following block sizes divide evenly into 4k * 2) all the blocks are ialloc'd to not cross 4k boundaries
1990/0227		*/ typedef struct { int size;
1990/0801/sys/src/9/port/stream.c:57,64 – 1990/08272/sys/src/9/port/stream.c:62,69
1990/0227		} Bclass; Bclass bclass[Nclass]={ { 0 },
1990/0321		{ 68 }, { 260 },
1990/08272		{ 64 }, { 256 },
1990/0409		{ 4096 },
1990/0227		};
1990/0801/sys/src/9/port/stream.c:133,140 – 1990/08272/sys/src/9/port/stream.c:138,150
1990/0227		n = n/2; bcp = &bclass[class]; for(i = 0; i < n; i++) {
1990/08272		/* * The i == 0 means that each allocation range * starts on a page boundary. This makes sure * no block crosses a page boundary. */
1990/0227		if(bcp->size) bp->base = (uchar *)ialloc(bcp->size, 0);
1990/08272		bp->base = (uchar *)ialloc(bcp->size, i == 0);
1990/0227		bp->lim = bp->base + bcp->size; bp->flags = class; freeb(bp);