Add support for scheduling policies

Add a process column for scheduling policy to show the current
scheduling policy of the process.

Add a the ability to change the scheduling policy of a process via the
key 'Y'.

Currently implemented on Linux and FreeBSD only but should be portable,
since sched_getscheduler(2) is part of POSIX.1-2001.

Closes: #1161

1 files changed, 2 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index de0718e1..73a8e91c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -260,6 +260,8 @@ AC_CHECK_FUNCS([ \
     memfd_create\
     openat \
     readlinkat \
+    sched_getscheduler \
+    sched_setscheduler \
    ])
 
 if test "$my_htop_platform" = darwin; then