1990/0705/gnot/lock.c (diff list | history)

1990/0623/sys/src/9/gnot/lock.c:18,40 – 1990/0705/sys/src/9/gnot/lock.c:18,41 (short | long | prev | next)
1990/03091		void lock(Lock *l) {
1990/0705		Lock *ll = l; /* do NOT take the address of l */
1990/03091		int i; /* * Try the fast grab first */
1990/0403		if(l->key >= 0){ l->key |= 0x80;
1990/0617		l->pc = ((ulong*)&l)[PCOFF];
1990/0705		if(ll->key >= 0){ ll->key |= 0x80; ll->pc = ((ulong*)&l)[PCOFF];
1990/03091		return; } for(i=0; i<10000000; i++)
1990/0403		if(l->key >= 0){ l->key |= 0x80;
1990/0617		l->pc = ((ulong*)&l)[PCOFF];
1990/0705		if(ll->key >= 0){ ll->key |= 0x80; ll->pc = ((ulong*)&l)[PCOFF];
1990/03091		return;
1990/0601		}
1990/0403		l->key = 0;
1990/0705		ll->key = 0;
1990/0619		dumpstack(); panic("lock loop %lux pc %lux held by pc %lux\n", l, ((ulong*)&l)[PCOFF], l->pc);
1990/03091		}
1990/0623/sys/src/9/gnot/lock.c:42,50 – 1990/0705/sys/src/9/gnot/lock.c:43,52
1990/03091		int canlock(Lock *l) {
1990/0403		if(l->key >= 0){ l->key |= 0x80;
1990/0617		l->pc = ((ulong*)&l)[PCOFF];
1990/0705		Lock *ll = l; /* do NOT take the address of l */ if(ll->key >= 0){ ll->key |= 0x80; ll->pc = ((ulong*)&l)[PCOFF];
1990/03091		return 1; } return 0;