patch 8.0.1170: using termdebug results in 100% CPU time
Problem: Using termdebug results in 100% CPU time. (tomleb)
Solution: Use polling instead of select().
diff --git a/src/proto/channel.pro b/src/proto/channel.pro
index a3a4dc7..40742ad 100644
--- a/src/proto/channel.pro
+++ b/src/proto/channel.pro
@@ -40,9 +40,9 @@
int channel_send(channel_T *channel, ch_part_T part, char_u *buf_arg, int len_arg, char *fun);
void ch_expr_common(typval_T *argvars, typval_T *rettv, int eval);
void ch_raw_common(typval_T *argvars, typval_T *rettv, int eval);
-int channel_poll_setup(int nfd_in, void *fds_in);
+int channel_poll_setup(int nfd_in, void *fds_in, int *towait);
int channel_poll_check(int ret_in, void *fds_in);
-int channel_select_setup(int maxfd_in, void *rfds_in, void *wfds_in);
+int channel_select_setup(int maxfd_in, void *rfds_in, void *wfds_in, struct timeval *tv, struct timeval **tvp);
int channel_select_check(int ret_in, void *rfds_in, void *wfds_in);
int channel_parse_messages(void);
int channel_any_readahead(void);