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osmo_io: Introduce API osmo_iofd_get_txqueue_max_length()

Change-Id: I92526aa554fc87734fae3fac0ad650d17bf52bb5
---
M include/osmocom/core/osmo_io.h
M src/core/libosmocore.map
M src/core/osmo_io.c
3 files changed, 12 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/87/41987/1

diff --git a/include/osmocom/core/osmo_io.h b/include/osmocom/core/osmo_io.h
index 525c23c..c92492c 100644
--- a/include/osmocom/core/osmo_io.h
+++ b/include/osmocom/core/osmo_io.h
@@ -233,6 +233,7 @@
 
 void osmo_iofd_set_alloc_info(struct osmo_io_fd *iofd, unsigned int size, unsigned int headroom);
 void osmo_iofd_set_txqueue_max_length(struct osmo_io_fd *iofd, unsigned int size);
+unsigned int osmo_iofd_get_txqueue_max_length(const struct osmo_io_fd *iofd);
 void *osmo_iofd_get_data(const struct osmo_io_fd *iofd);
 void osmo_iofd_set_data(struct osmo_io_fd *iofd, void *data);
 
diff --git a/src/core/libosmocore.map b/src/core/libosmocore.map
index cb79843..f6e15f0 100644
--- a/src/core/libosmocore.map
+++ b/src/core/libosmocore.map
@@ -273,6 +273,7 @@
 osmo_iofd_set_name;
 osmo_iofd_set_name_f;
 osmo_iofd_get_priv_nr;
+osmo_iofd_get_txqueue_max_length;
 osmo_iofd_init;
 osmo_iofd_mode_names;
 osmo_iofd_ops;
diff --git a/src/core/osmo_io.c b/src/core/osmo_io.c
index 514d592..3cd9dc5 100644
--- a/src/core/osmo_io.c
+++ b/src/core/osmo_io.c
@@ -1147,6 +1147,16 @@
 	iofd->tx_queue.max_length = max_length;
 }
 
+
+/*! Get the maximum number of messages enqueued for sending.
+ *  \param[in] iofd the file descriptor
+ *  \returns the maximum size of the transmit queue
+ */
+unsigned int osmo_iofd_get_txqueue_max_length(const struct osmo_io_fd *iofd)
+{
+	return iofd->tx_queue.max_length;
+}
+
 /*! Retrieve the associated user-data from an osmo_io_fd.
  *
  *  A call to this function will return the opaque user data pointer which was specified previously

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