1 /* Generic write queue implementation */
3 * (C) 2010 by Holger Hans Peter Freyther
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 #include <osmocore/write_queue.h>
26 int write_queue_bfd_cb(struct bsc_fd *fd, unsigned int what)
28 struct write_queue *queue;
30 queue = container_of(fd, struct write_queue, bfd);
32 if (what & BSC_FD_READ)
35 if (what & BSC_FD_EXCEPT)
38 if (what & BSC_FD_WRITE) {
41 fd->when &= ~BSC_FD_WRITE;
42 msg = msgb_dequeue(&queue->msg_queue);
46 --queue->current_length;
47 queue->write_cb(fd, msg);
50 if (!llist_empty(&queue->msg_queue))
51 fd->when |= BSC_FD_WRITE;
57 void write_queue_init(struct write_queue *queue, int max_length)
59 queue->max_length = max_length;
60 queue->current_length = 0;
61 queue->read_cb = NULL;
62 queue->write_cb = NULL;
63 queue->bfd.cb = write_queue_bfd_cb;
64 INIT_LLIST_HEAD(&queue->msg_queue);
67 int write_queue_enqueue(struct write_queue *queue, struct msgb *data)
69 // if (queue->current_length + 1 >= queue->max_length)
70 // LOGP(DMSC, LOGL_ERROR, "The queue is full. Dropping not yet implemented.\n");
72 ++queue->current_length;
73 msgb_enqueue(&queue->msg_queue, data);
74 queue->bfd.when |= BSC_FD_WRITE;
79 void write_queue_clear(struct write_queue *queue)
81 while (!llist_empty(&queue->msg_queue)) {
82 struct msgb *msg = msgb_dequeue(&queue->msg_queue);
86 queue->current_length = 0;
87 queue->bfd.when &= ~BSC_FD_WRITE;