1 /* go-close.c -- the builtin close function.
3 Copyright 2009 The Go Authors. All rights reserved.
4 Use of this source code is governed by a BSD-style
5 license that can be found in the LICENSE file. */
11 /* Close a channel. After a channel is closed, sends are no longer
12 permitted. Receives always return zero. */
15 __go_builtin_close (struct __go_channel
*channel
)
19 i
= pthread_mutex_lock (&channel
->lock
);
22 while (channel
->selected_for_send
)
24 i
= pthread_cond_wait (&channel
->cond
, &channel
->lock
);
28 if (channel
->is_closed
)
30 i
= pthread_mutex_unlock (&channel
->lock
);
32 __go_panic_msg ("close of closed channel");
35 channel
->is_closed
= 1;
37 i
= pthread_cond_broadcast (&channel
->cond
);
40 __go_unlock_and_notify_selects (channel
);