os: inputthread: non-blocking I/O pipe's read end is enough

Although we're not expecting to see the case of the pipe become full, we
prefer to block write if this happens.

Also, document better a bit the reason of read end be non-blocking.

Signed-off-by: Tiago Vignatti <tiago.vignatti@nokia.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/os/connection.c b/os/connection.c
index 8760c1256..9be20779e 100644
--- a/os/connection.c
+++ b/os/connection.c
@@ -403,13 +403,13 @@ CreateWellKnownSockets(void)
         exit(1);
     }
 
-    /* Make the pipes nonblocking */
-    fcntl(tfd[0], F_SETFL, O_NONBLOCK);
-    fcntl(tfd[1], F_SETFL, O_NONBLOCK);
-
     InputThreadReadPipe = tfd[0];
     InputThreadWritePipe = tfd[1];
 
+    /* We make pipe's read end nonblocking so while main thread is busy doing
+     * something, the input thread can work in parallel */
+    fcntl(InputThreadReadPipe, F_SETFL, O_NONBLOCK);
+
     FD_ZERO(&InputThreadFd);
 
     NumDevicesThreaded = 0;