From 19abe47a6f743a2c19480663f16448b6953ffc1d Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Thu, 31 Jul 2014 15:01:37 -0600
Subject: [PATCH] sem_wait: Use set_errno() and get_errno().  Direce access
 inside the OS may not be supported in the future.

---
 sched/sem_wait.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sched/sem_wait.c b/sched/sem_wait.c
index b7d16434c0e..53e2cf21f10 100644
--- a/sched/sem_wait.c
+++ b/sched/sem_wait.c
@@ -106,7 +106,7 @@ int sem_wait(FAR sem_t *sem)
 
   /* Assume any errors reported are due to invalid arguments. */
 
-  errno = EINVAL;
+  set_errno(EINVAL);
 
   if (sem)
     {
@@ -168,7 +168,7 @@ int sem_wait(FAR sem_t *sem)
 #endif
           /* Add the TCB to the prioritized semaphore wait queue */
 
-          errno = 0;
+          set_errno(0);
           up_block_task(rtcb, TSTATE_WAIT_SEM);
 
           /* When we resume at this point, either (1) the semaphore has been
@@ -191,7 +191,7 @@ int sem_wait(FAR sem_t *sem)
            * race conditions.
            */
 
-          if (errno != EINTR && errno != ETIMEDOUT)
+          if (get_errno() != EINTR && get_errno() != ETIMEDOUT)
             {
               /* Not awakened by a signal or a timeout... We hold the semaphore */