double exclamation mark meaning ?
From: devendra.aaru <hidden>
Date: 2012-12-06 13:54:45
On Thu, Dec 6, 2012 at 4:50 AM, Shraddha Kamat [off-list ref] wrote:
Hi, # define likely(x) __builtin_expect(!!(x), 1) # define unlikely(x) __builtin_expect(!!(x), 0) I see these !! in the above expressions. Please explain me the meaning of those double exclamations. What is their significance ?
this is c question, right, google is your friend
-- Shraddha _______________________________________________ Kernelnewbies mailing list Kernelnewbies at kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies