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-rw-r--r--include/osmocore/Makefile.am2
-rw-r--r--include/osmocore/write_queue.h43
-rw-r--r--src/Makefile.am3
-rw-r--r--src/write_queue.c74
4 files changed, 120 insertions, 2 deletions
diff --git a/include/osmocore/Makefile.am b/include/osmocore/Makefile.am
index 02117528..cc9db084 100644
--- a/include/osmocore/Makefile.am
+++ b/include/osmocore/Makefile.am
@@ -1,6 +1,6 @@
osmocore_HEADERS = signal.h linuxlist.h timer.h talloc.h msgb.h select.h \
tlv.h bitvec.h comp128.h statistics.h gsm_utils.h utils.h \
- gsmtap.h
+ gsmtap.h write_queue.h
osmocoredir = $(includedir)/osmocore
diff --git a/include/osmocore/write_queue.h b/include/osmocore/write_queue.h
new file mode 100644
index 00000000..af3d44be
--- /dev/null
+++ b/include/osmocore/write_queue.h
@@ -0,0 +1,43 @@
+/* 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.
+ *
+ */
+#ifndef write_queue_h
+#define write_queue_h
+
+#include "select.h"
+#include "msgb.h"
+
+struct write_queue {
+ struct bsc_fd bfd;
+ unsigned int max_length;
+ unsigned int current_length;
+
+ struct llist_head msg_queue;
+
+ int (*read_cb)(struct bsc_fd *fd);
+ int (*write_cb)(struct bsc_fd *fd, struct msgb *msg);
+};
+
+void write_queue_init(struct write_queue *queue, int max_length);
+int write_queue_enqueue(struct write_queue *queue, struct msgb *data);
+
+#endif
diff --git a/src/Makefile.am b/src/Makefile.am
index b82b6fb1..c0c94883 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -8,4 +8,5 @@ AM_CFLAGS = -fPIC -Wall
lib_LTLIBRARIES = libosmocore.la
libosmocore_la_SOURCES = msgb.c timer.c talloc.c select.c signal.c \
- tlv_parser.c bitvec.c comp128.c gsm_utils.c statistics.c
+ tlv_parser.c bitvec.c comp128.c gsm_utils.c statistics.c \
+ write_queue.c
diff --git a/src/write_queue.c b/src/write_queue.c
new file mode 100644
index 00000000..597fbe75
--- /dev/null
+++ b/src/write_queue.c
@@ -0,0 +1,74 @@
+/* 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>
+
+static int queue_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_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 = queue_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;
+}