1992/0620/port/chan.c (diff list | history)

1992/0619/sys/src/9/port/chan.c:5,13 – 1992/0620/sys/src/9/port/chan.c:5,15 (short | long | prev | next)
1990/0227		#include "fns.h"
1992/0111		#include "../port/error.h"
1990/0227		struct{
1992/0620		struct {
1990/0227		Lock; Chan *free;
1992/0620		int fid;
1990/0227		}chanalloc; int
1992/0619/sys/src/9/port/chan.c:38,59 – 1992/0620/sys/src/9/port/chan.c:40,45
1990/0227		} void chaninit(void) { int i; Chan *c;                  chanalloc.free = ialloc(conf.nchan*sizeof(Chan), 0);                  c = chanalloc.free; for(i=0; i<conf.nchan-1; i++,c++){ c->fid = i; c->next = c+1; } c->next = 0; }                  void chandevreset(void) { int i;
1992/0619/sys/src/9/port/chan.c:75,104 – 1992/0620/sys/src/9/port/chan.c:61,96
1990/0227		newchan(void) { Chan *c;
1992/0620		int nfid;
1990/0227
1991/1011		for(;;) { lock(&chanalloc); if(c = chanalloc.free) { chanalloc.free = c->next;
1991/1206		/* if you get an error before associating with a dev, close calls rootclose, a nop */
1991/1011		c->type = 0; c->flag = 0; c->ref = 1; unlock(&chanalloc); c->dev = 0; c->offset = 0; c->mnt = 0; c->stream = 0; c->aux = 0; c->mchan = 0; c->mqid = (Qid){0, 0}; return c; }
1990/0227		unlock(&chanalloc);
1991/1011		resrcwait("no chans\n");
1992/0620		SET(nfid); lock(&chanalloc); c = chanalloc.free; if(c) chanalloc.free = c->next; else nfid = ++chanalloc.fid; unlock(&chanalloc); if(c == 0) { c = smalloc(sizeof(Chan)); c->fid = nfid;
1990/0227		}
1992/0520		return 0; /* not reached */
1992/0620		/* if you get an error before associating with a dev, close calls rootclose, a nop */ c->type = 0; c->flag = 0; c->ref = 1; c->dev = 0; c->offset = 0; c->mnt = 0; c->stream = 0; c->aux = 0; c->mchan = 0; c->mqid = (Qid){0, 0}; return c;
1990/0227		} void