init private data

[lttng-ust.git] / libringbuffer / ring_buffer_frontend.c

diff --git a/libringbuffer/ring_buffer_frontend.c b/libringbuffer/ring_buffer_frontend.c
index fdb4bdfcc9b4f0a289a2dac09facd5aefdb501a9..6de8336861e4dadc43d77cf4f77140c54f67f64f 100644 (file)
--- a/libringbuffer/ring_buffer_frontend.c
+++ b/libringbuffer/ring_buffer_frontend.c
@@ -411,6 +411,7 @@ static void channel_free(struct channel *chan, struct lttng_ust_shm_handle *hand
  * @name: name of the channel
  * @priv_data: ring buffer client private data area pointer (output)
  * @priv_data_size: length, in bytes, of the private data area.
+ * @priv_data_init: initialization data for private data.
  * @buf_addr: pointer the the beginning of the preallocated buffer contiguous
  *            address mapping. It is used only by RING_BUFFER_STATIC
  *            configuration. It can be set to NULL for other backends.
@@ -429,6 +430,7 @@ struct lttng_ust_shm_handle *channel_create(const struct lttng_ust_lib_ring_buff
                   void **priv_data,
                   size_t priv_data_align,
                   size_t priv_data_size,
+                  void *priv_data_init,
                   void *buf_addr, size_t subbuf_size,
                   size_t num_subbuf, unsigned int switch_timer_interval,
                   unsigned int read_timer_interval,
@@ -486,6 +488,7 @@ struct lttng_ust_shm_handle *channel_create(const struct lttng_ust_lib_ring_buff
                if (!shmp(handle, priv_data_alloc))
                        goto error_append;
                *priv_data = channel_get_private(chan);
+               memcpy(*priv_data, priv_data_init, priv_data_size);
        } else {
                chan->priv_data_offset = -1;
                *priv_data = NULL;