| /* Generic write queue implementation */ |
| /* |
| * (C) 2010 by Holger Hans Peter Freyther |
| * (C) 2010 by On-Waves |
| * |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| */ |
| |
| #include <osmocore/write_queue.h> |
| |
| int write_queue_bfd_cb(struct bsc_fd *fd, unsigned int what) |
| { |
| struct write_queue *queue; |
| |
| queue = container_of(fd, struct write_queue, bfd); |
| |
| if (what & BSC_FD_READ) |
| queue->read_cb(fd); |
| |
| if (what & BSC_FD_EXCEPT) |
| queue->except_cb(fd); |
| |
| if (what & BSC_FD_WRITE) { |
| struct msgb *msg; |
| |
| fd->when &= ~BSC_FD_WRITE; |
| msg = msgb_dequeue(&queue->msg_queue); |
| if (!msg) |
| return -1; |
| |
| --queue->current_length; |
| queue->write_cb(fd, msg); |
| msgb_free(msg); |
| |
| if (!llist_empty(&queue->msg_queue)) |
| fd->when |= BSC_FD_WRITE; |
| } |
| |
| return 0; |
| } |
| |
| void write_queue_init(struct write_queue *queue, int max_length) |
| { |
| queue->max_length = max_length; |
| queue->current_length = 0; |
| queue->read_cb = NULL; |
| queue->write_cb = NULL; |
| queue->bfd.cb = write_queue_bfd_cb; |
| INIT_LLIST_HEAD(&queue->msg_queue); |
| } |
| |
| int write_queue_enqueue(struct write_queue *queue, struct msgb *data) |
| { |
| // if (queue->current_length + 1 >= queue->max_length) |
| // LOGP(DMSC, LOGL_ERROR, "The queue is full. Dropping not yet implemented.\n"); |
| |
| ++queue->current_length; |
| msgb_enqueue(&queue->msg_queue, data); |
| queue->bfd.when |= BSC_FD_WRITE; |
| |
| return 0; |
| } |
| |
| void write_queue_clear(struct write_queue *queue) |
| { |
| while (!llist_empty(&queue->msg_queue)) { |
| struct msgb *msg = msgb_dequeue(&queue->msg_queue); |
| msgb_free(msg); |
| } |
| |
| queue->current_length = 0; |
| queue->bfd.when &= ~BSC_FD_WRITE; |
| } |