1995/0902/port/qio.c (diff list | history)

1995/0714/sys/src/9/port/qio.c:138,144 – 1995/0902/sys/src/9/port/qio.c:138,146 (short | long | prev | next)
1993/0526		} /*
1994/0208		* allocate queues and blocks (round data base address to 64 bit boundary)
1995/0902		* allocate blocks (round data base address to 64 bit boundary). * if mallocz gives us more than we asked for, leave room at the front * for header.
1993/0526		*/ Block* allocb(int size)
1995/0714/sys/src/9/port/qio.c:145,153 – 1995/0902/sys/src/9/port/qio.c:147,156
1993/0526		{ Block *b;
1994/0208		ulong addr;
1995/0902		int n;
1993/0526
1994/0322		size = sizeof(Block) + size + (BY2V-1); b = mallocz(size, 0);
1995/0902		n = sizeof(Block) + size + (BY2V-1); b = mallocz(n, 0);
1993/0526		if(b == 0) exhausted("Blocks");
1994/0322		memset(b, 0, sizeof(Block));
1995/0714/sys/src/9/port/qio.c:155,165 – 1995/0902/sys/src/9/port/qio.c:158,195
1994/0208		addr = (ulong)b;
1994/0322		addr = ROUND(addr + sizeof(Block), BY2V);
1994/0208		b->base = (uchar*)addr;
1995/0902		b->lim = ((uchar*)b) + msize(b);
1993/0804		b->rp = b->base; b->wp = b->base;
1994/0208		b->lim = ((uchar*)b) + size;
1995/0902		n = b->lim - b->base - size; b->rp += n & ~(BY2V-1); b->wp = b->rp;
1993/0526		return b;
1995/0902		} ulong bpadoverhead; /* * pad a block to the front */ Block* bpad(Block *bp, int size) { int n; Block *nbp; if(bp->rp - bp->base > size) return bp; n = bp->wp - bp->rp; bpadoverhead += n; nbp = allocb(size+n); nbp->rp += size; nbp->wp = nbp->rp; memmove(nbp->wp, bp->rp, n); nbp->wp += n; freeb(bp); return nbp;
1993/0526		} /*