Fix: make ust consumer posix compliant for poll flags

[lttng-tools.git] / src / common / kernel-consumer / kernel-consumer.h

diff --git a/src/common/kernel-consumer/kernel-consumer.h b/src/common/kernel-consumer/kernel-consumer.h
index 6e820044bad2ea6618786ff4673bd009f405d199..f4f46169de2a15bf9548df2d8f554a43681ceef9 100644 (file)
--- a/src/common/kernel-consumer/kernel-consumer.h
+++ b/src/common/kernel-consumer/kernel-consumer.h
@@ -25,18 +25,19 @@
 /*
  * 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, or negative value on error.
  */
-extern int lttng_kconsumer_on_read_subbuffer_mmap(
+extern ssize_t lttng_kconsumer_on_read_subbuffer_mmap(
                struct lttng_consumer_local_data *ctx,
                struct lttng_consumer_stream *stream, unsigned long len);
 
 /*
  * Splice the data from the ring buffer to the tracefile.
  *
- * Returns the number of bytes spliced.
+ * Returns the number of bytes spliced, or negative error value on
+ * error.
  */
-extern int lttng_kconsumer_on_read_subbuffer_splice(
+extern ssize_t lttng_kconsumer_on_read_subbuffer_splice(
                struct lttng_consumer_local_data *ctx,
                struct lttng_consumer_stream *stream, unsigned long len);
 
@@ -62,7 +63,7 @@ int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx,
                int sock, struct pollfd *consumer_sockpoll);
 
 
-int lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
+ssize_t lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
                struct lttng_consumer_local_data *ctx);
 int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream *stream);