/*
* Mmap the ring buffer, read it and write the data to the tracefile.
*
- * Returns the number of bytes written
+ * Returns the number of bytes written, else negative value on error.
*/
-int lttng_ustconsumer_on_read_subbuffer_mmap(
+ssize_t lttng_ustconsumer_on_read_subbuffer_mmap(
struct lttng_consumer_local_data *ctx,
struct lttng_consumer_stream *stream, unsigned long len)
{
*
* Returns the number of bytes spliced.
*/
-int lttng_ustconsumer_on_read_subbuffer_splice(
+ssize_t lttng_ustconsumer_on_read_subbuffer_splice(
struct lttng_consumer_local_data *ctx,
struct lttng_consumer_stream *stream, unsigned long len)
{