#include <stdlib.h>
+#include <lttng/lttng.h>
+
/* Default channel attributes */
#define DEFAULT_CHANNEL_NAME "channel0"
#define DEFAULT_CHANNEL_OVERWRITE 0 /* usec */
/* See lttng-kernel.h enum lttng_kernel_output for channel output */
#define DEFAULT_KERNEL_CHANNEL_OUTPUT LTTNG_EVENT_SPLICE
+/* User space defaults */
+
+/* Must be a power of 2 */
+#define DEFAULT_UST_CHANNEL_SUBBUF_SIZE 4096 /* bytes */
+/* Must be a power of 2 */
+#define DEFAULT_UST_CHANNEL_SUBBUF_NUM 4
+/* See lttng-ust.h enum lttng_ust_output */
+#define DEFAULT_UST_CHANNEL_OUTPUT LTTNG_UST_MMAP
+
+/*
+ * Default timeout value for the sem_timedwait() call. Blocking forever is not
+ * wanted so a timeout is used to control the data flow and not freeze the
+ * session daemon.
+ */
+#define DEFAULT_SEM_WAIT_TIMEOUT 30 /* in seconds */
+
/*
* Takes a pointer x and transform it so we can use it to access members
* without a function call. Here an example: