From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Thu, 20 Oct 2011 18:45:59 +0000 (-0400)
Subject: Implement ustctl_unmap_channel()
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=5224b5c8815b8afb888359719e1d05c1e2514c48;p=ust.git

Implement ustctl_unmap_channel()

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/include/ust/lttng-ust-ctl.h b/include/ust/lttng-ust-ctl.h
index 96d627c..58906a5 100644
--- a/include/ust/lttng-ust-ctl.h
+++ b/include/ust/lttng-ust-ctl.h
@@ -71,7 +71,6 @@ struct lttng_ust_calibrate;
 int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate);
 
 /* TODO: object_data send/recv between sessiond and consumer */
-/* TODO: release shm_handle */
 
 /*
  * Map channel shm_handle and add streams. Typically performed by the
@@ -80,6 +79,11 @@ int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate);
 struct shm_handle *ustctl_map_channel(struct object_data *chan_data);
 int ustctl_add_stream(struct shm_handle *shm_handle,
 		struct object_data *stream_data);
+/*
+ * Note: the object_data from which the shm_handle is derived can only
+ * be released after unmapping the handle.
+ */
+void ustctl_unmap_channel(struct shm_handle *shm_handle);
 
 /* Buffer operations */
 
diff --git a/libustctl/ustctl.c b/libustctl/ustctl.c
index 3d886d3..581de96 100644
--- a/libustctl/ustctl.c
+++ b/libustctl/ustctl.c
@@ -444,6 +444,14 @@ int ustctl_add_stream(struct shm_handle *handle,
 	return 0;
 }
 
+void ustctl_unmap_channel(struct shm_handle *handle)
+{
+	struct channel *chan;
+
+	chan = shmp(handle, handle->chan);
+	channel_destroy(chan, handle, 1);
+}
+
 /* For mmap mode, readable without "get" operation */
 
 /* returns the length to mmap. */