#endif
extern
-int lib_ring_buffer_reserve_slow(struct lttng_ust_lib_ring_buffer_ctx *ctx);
+int lib_ring_buffer_reserve_slow(struct lttng_ust_lib_ring_buffer_ctx *ctx,
+ void *client_ctx);
extern
void lib_ring_buffer_switch_slow(struct lttng_ust_lib_ring_buffer *buf,
consumed_new) != consumed_old));
}
+static inline
+void lib_ring_buffer_clear_reader(struct lttng_ust_lib_ring_buffer *buf,
+ struct lttng_ust_shm_handle *handle)
+{
+ struct channel *chan;
+ const struct lttng_ust_lib_ring_buffer_config *config;
+ unsigned long offset, consumed_old, consumed_new;
+
+ chan = shmp(handle, buf->backend.chan);
+ if (!chan)
+ return;
+ config = &chan->backend.config;
+
+ do {
+ offset = v_read(config, &buf->offset);
+ consumed_old = uatomic_read(&buf->consumed);
+ if (caa_unlikely(subbuf_trunc(offset, chan)
+ - subbuf_trunc(consumed_old, chan)
+ > 0))
+ consumed_new = subbuf_trunc(offset, chan);
+ else
+ return;
+ } while (caa_unlikely(uatomic_cmpxchg(&buf->consumed, consumed_old,
+ consumed_new) != consumed_old));
+}
+
static inline
int lib_ring_buffer_pending_data(const struct lttng_ust_lib_ring_buffer_config *config,
struct lttng_ust_lib_ring_buffer *buf,