Change LTTNG_POLL_GETNB behaviour for poll flavor

[lttng-tools.git] / src / common / compat / poll.h

diff --git a/src/common/compat/poll.h b/src/common/compat/poll.h
index 77c46a1d08d60ac8bca806628f368fc46fc915c2..5eb7ff9c587eb84e883dd0ead186212270572d00 100644 (file)
--- a/src/common/compat/poll.h
+++ b/src/common/compat/poll.h
@@ -171,6 +171,14 @@ extern int compat_epoll_del(struct lttng_poll_event *events, int fd);
 #define lttng_poll_del(events, fd) \
        compat_epoll_del(events, fd)
 
+/*
+ * Modify an fd's events in the epoll set.
+ */
+extern int compat_epoll_mod(struct lttng_poll_event *events,
+               int fd, uint32_t req_events);
+#define lttng_poll_mod(events, fd, req_events) \
+       compat_epoll_mod(events, fd, req_events)
+
 /*
  * Set up the poll set limits variable poll_max_size
  */
@@ -307,10 +315,12 @@ static inline int __lttng_poll_get_prev_fd(struct lttng_poll_event *events,
 /*
  * For the following calls, consider 'e' to be a lttng_poll_event pointer and i
  * being the index of the events array.
+ * LTTNG_POLL_GETNB is always used after lttng_poll_wait, thus we can use the
+ * current list for test compatibility purposes.
  */
 #define LTTNG_POLL_GETFD(e, i) LTTNG_REF(e)->wait.events[i].fd
 #define LTTNG_POLL_GETEV(e, i) LTTNG_REF(e)->wait.events[i].revents
-#define LTTNG_POLL_GETNB(e) LTTNG_REF(e)->wait.nb_fd
+#define LTTNG_POLL_GETNB(e) LTTNG_REF(e)->current.nb_fd
 #define LTTNG_POLL_GETSZ(e) LTTNG_REF(e)->wait.events_size
 #define LTTNG_POLL_GET_PREV_FD(e, i, nb_fd) \
        __lttng_poll_get_prev_fd(LTTNG_REF(e), i, nb_fd)
@@ -347,6 +357,14 @@ extern int compat_poll_del(struct lttng_poll_event *events, int fd);
 #define lttng_poll_del(events, fd) \
        compat_poll_del(events, fd)
 
+/*
+ * Modify an fd's events in the epoll set.
+ */
+extern int compat_poll_mod(struct lttng_poll_event *events,
+               int fd, uint32_t req_events);
+#define lttng_poll_mod(events, fd, req_events) \
+       compat_poll_mod(events, fd, req_events)
+
 /*
  * Set up the poll set limits variable poll_max_size
  */