align.h: Implement ALIGN_FLOOR macro

[lttng-tools.git] / src / common / pipe.h

diff --git a/src/common/pipe.h b/src/common/pipe.h
index 2d4fc967d615d5520e20de6098c561ac49148850..01fe8824244184a0843b1f1df914ad02136b9167 100644 (file)
--- a/src/common/pipe.h
+++ b/src/common/pipe.h
@@ -20,6 +20,7 @@
 
 #include <pthread.h>
 #include <common/macros.h>
+#include <sys/types.h>
 
 enum lttng_pipe_state {
        LTTNG_PIPE_STATE_OPENED = 1,
@@ -50,7 +51,7 @@ struct lttng_pipe {
 /*
  * Return 1 if read side is open else 0.
  */
-static inline int lttng_pipe_is_read_open(struct lttng_pipe *pipe)
+static inline int lttng_pipe_is_read_open(const struct lttng_pipe *pipe)
 {
        return pipe->r_state == LTTNG_PIPE_STATE_OPENED ? 1 : 0;
 }
@@ -58,17 +59,17 @@ static inline int lttng_pipe_is_read_open(struct lttng_pipe *pipe)
 /*
  * Return 1 if write side is open else 0.
  */
-static inline int lttng_pipe_is_write_open(struct lttng_pipe *pipe)
+static inline int lttng_pipe_is_write_open(const struct lttng_pipe *pipe)
 {
        return pipe->w_state == LTTNG_PIPE_STATE_OPENED ? 1 : 0;
 }
 
-static inline int lttng_pipe_get_readfd(struct lttng_pipe *pipe)
+static inline int lttng_pipe_get_readfd(const struct lttng_pipe *pipe)
 {
        return pipe->fd[0];
 }
 
-static inline int lttng_pipe_get_writefd(struct lttng_pipe *pipe)
+static inline int lttng_pipe_get_writefd(const struct lttng_pipe *pipe)
 {
        return pipe->fd[1];
 }