X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Fcompat%2Fpoll.h;h=4b2fc5036843c5863047125a8c1d79085405b34f;hb=bbbfd84979130a11aebf172cf7d0d24e28165258;hp=9f59d35c3c84faf821f1237416d743f1412bb2e1;hpb=6f04ed72990f6c72d16fd08d39feac0967da732e;p=lttng-tools.git

diff --git a/src/common/compat/poll.h b/src/common/compat/poll.h
index 9f59d35c3..4b2fc5036 100644
--- a/src/common/compat/poll.h
+++ b/src/common/compat/poll.h
@@ -73,7 +73,7 @@ enum {
 	LPOLLNVAL = EPOLLHUP,
 	LPOLLRDHUP = EPOLLRDHUP,
 	/* Close on exec feature of epoll */
-#if __GLIBC_PREREQ(2, 9)
+#if defined(HAVE_EPOLL_CREATE1) && defined(EPOLL_CLOEXEC)
 	LTTNG_CLOEXEC = EPOLL_CLOEXEC,
 #else
 	/*
@@ -119,15 +119,13 @@ static inline int __lttng_epoll_get_prev_fd(struct lttng_poll_event *events,
 #define LTTNG_POLL_GET_PREV_FD(e, i, nb_fd) \
 	__lttng_epoll_get_prev_fd(LTTNG_REF(e), i, nb_fd)
 
-/*
- * Create the epoll set. No memory allocation is done here.
- */
+/* Create the epoll set. */
 extern int compat_epoll_create(struct lttng_poll_event *events,
 		int size, int flags);
 #define lttng_poll_create(events, size, flags) \
 	compat_epoll_create(events, size, flags)
 
-#if __GLIBC_PREREQ(2, 9)
+#if defined(HAVE_EPOLL_CREATE1) && defined(EPOLL_CLOEXEC)
 static inline int compat_glibc_epoll_create(int size __attribute__((unused)),
 		int flags)
 {
@@ -171,10 +169,18 @@ 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
  */
-extern void compat_epoll_set_max_size(void);
+extern int compat_epoll_set_max_size(void);
 #define lttng_poll_set_max_size() \
 	compat_epoll_set_max_size()
 
@@ -254,7 +260,7 @@ enum {
 #if __linux__
 	LPOLLMSG = POLLMSG,
 	LPOLLRDHUP = POLLRDHUP,
-#elif (defined(__FreeBSD__) || defined(__CYGWIN__))
+#elif (defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__sun__) || defined(__APPLE__))
 	LPOLLMSG = 0,
 	LPOLLRDHUP = 0,
 #else
@@ -285,8 +291,7 @@ struct compat_poll_event {
 	 * execution before a poll wait is done.
 	 */
 	struct compat_poll_event_array current;
-	/* Indicate if wait.events needs to be realloc. */
-	int need_realloc:1;
+
 	/* Indicate if wait.events need to be updated from current. */
 	int need_update:1;
 };
@@ -308,10 +313,12 @@ 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)
@@ -348,10 +355,18 @@ 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 poll 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
  */
-extern void compat_poll_set_max_size(void);
+extern int compat_poll_set_max_size(void);
 #define lttng_poll_set_max_size() \
 	compat_poll_set_max_size()