1990/0601/gnot/lock.c (diff list | history)

1990/0601/sys/src/9/gnot/lock.c:4,10 – 1990/0617/sys/src/9/gnot/lock.c:4,10 (short | long | prev | next)
1990/03091		#include "dat.h" #include "fns.h"
1990/0403		#define PCOFF -2
1990/0617		#define PCOFF -1
1990/0403		/* * N.B. Ken's compiler generates a TAS instruction for the sequence:
1990/0601/sys/src/9/gnot/lock.c:25,37 – 1990/0617/sys/src/9/gnot/lock.c:25,37
1990/03091		*/
1990/0403		if(l->key >= 0){ l->key |= 0x80; l->pc = ((ulong*)&i)[PCOFF];
1990/0617		l->pc = ((ulong*)&l)[PCOFF];
1990/03091		return; } for(i=0; i<10000000; i++)
1990/0403		if(l->key >= 0){ l->key |= 0x80; l->pc = ((ulong*)&i)[PCOFF];
1990/0617		l->pc = ((ulong*)&l)[PCOFF];
1990/03091		return;
1990/0601		}
1990/0403		l->key = 0;
1990/0601/sys/src/9/gnot/lock.c:41,51 – 1990/0617/sys/src/9/gnot/lock.c:41,49
1990/03091		int canlock(Lock *l) {
1990/0403		int i;                  if(l->key >= 0){ l->key |= 0x80; l->pc = ((ulong*)&i)[PCOFF];
1990/0617		l->pc = ((ulong*)&l)[PCOFF];
1990/03091		return 1; } return 0;