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Use atomic operation

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This commit is contained in:
Ricky Zhang 2014-09-18 16:10:41 -04:00
parent b5b415da0d
commit 39be6a0ac9
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GPG Key ID: 9E291B0BFD83C3B8
1 changed files with 13 additions and 11 deletions
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24
BasiliskII/src/Unix/Linux/NetDriver/sheep_net.c
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@ -158,7 +158,7 @@ struct SheepVars {
char eth_addr[6]; /* Hardware address of the Ethernet card */
char fake_addr[6]; /* Local faked hardware address (what SheepShaver sees) */
#ifdef LINUX_3_15
int got_packet;
atomic_t got_packet;
#endif
};
@ -396,14 +396,10 @@ static ssize_t sheep_net_read(struct file *f, char *buf, size_t count, loff_t *o
if (skb != NULL || (f->f_flags & O_NONBLOCK))
break;
/*packet is not available*/
#ifdef LINUX_3_15
v->got_packet = 0;
#endif
/* No packet in queue and in blocking mode, so block */
#ifdef LINUX_3_15
wait_event_interruptible(v->wait, v->got_packet == 1);
atomic_set(&v->got_packet, 0);
wait_event_interruptible(v->wait, atomic_read(&v->got_packet));
#else
interruptible_sleep_on(&v->wait);
#endif
@ -746,12 +742,18 @@ static int sheep_net_receiver(struct sk_buff *skb, struct net_device *dev, struc
/* Enqueue packet */
skb_queue_tail(&v->queue, skb);
/* Unblock blocked read */
#ifdef LINUX_3_15
v->got_packet = 1;
#endif
/* Unblock blocked read */
wake_up(&v->wait);
atomic_set(&v->got_packet, 1);
wake_up_interruptible(&v->wait);
#else
wake_up(&v->wait);
#endif
return 0;
drop: