X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fpipe.h;h=01fe8824244184a0843b1f1df914ad02136b9167;hp=1a1087c10e12ed1d4b8a6637a8c3f635e1530044;hb=14c4262b940630bbb75f68b8c2eaef2b134a62d9;hpb=9c2bd8db1c70269d37537b7d02bae41ccab29056

diff --git a/src/common/pipe.h b/src/common/pipe.h
index 1a1087c10..01fe88242 100644
--- 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];
 }
@@ -93,5 +94,11 @@ ssize_t lttng_pipe_read(struct lttng_pipe *pipe, void *buf, size_t count);
 LTTNG_HIDDEN
 ssize_t lttng_pipe_write(struct lttng_pipe *pipe, const void *buf,
 		size_t count);
+/* Returns and releases the read end of the pipe. */
+LTTNG_HIDDEN
+int lttng_pipe_release_readfd(struct lttng_pipe *pipe);
+/* Returns and releases the write end of the pipe. */
+LTTNG_HIDDEN
+int lttng_pipe_release_writefd(struct lttng_pipe *pipe);
 
 #endif /* LTTNG_PIPE_H */