1993/0830/port/taslock.c (diff list | history)

port/taslock.c on 1992/0222
1992/0222		#include "u.h"
1992/0321		#include "../port/lib.h"
1992/0222		#include "mem.h" #include "dat.h" #include "fns.h" #include "../port/error.h" void lock(Lock *l) {
1993/0830		for(;;){ while(l->key) ; if(tas(&l->key) == 0)
1992/0222		return; } } int canlock(Lock *l) { if(tas(&l->key)) return 0; l->pc = getcallerpc(((uchar*)&l) - sizeof(l)); return 1; } void unlock(Lock *l) { l->pc = 0; l->key = 0; }