[rtems commit] sync.c: Add asserts to document and check assumptions

[Joel Sherril]

Module:    rtems
Branch:    master
Commit:    e22af784cd44cd407e268307ede01f6e1b621393
Changeset: http://git.rtems.org/rtems/commit/?id=e22af784cd44cd407e268307ede01f6e1b621393

Author:    Joel Sherrill <joel.sherrill at oarcorp.com>
Date:      Thu Nov 27 09:30:12 2014 -0600

sync.c: Add asserts to document and check assumptions

---

 cpukit/libcsupport/src/sync.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/cpukit/libcsupport/src/sync.c b/cpukit/libcsupport/src/sync.c
index 653a177..f27349c 100644
--- a/cpukit/libcsupport/src/sync.c
+++ b/cpukit/libcsupport/src/sync.c
@@ -29,6 +29,7 @@ int fdatasync(int);        /* still not always prototyped */
 #include <stdio.h>
 
 #include <rtems.h>
+#include <rtems/score/assert.h>
 
 /* XXX check standards -- Linux version appears to be void */
 void _fwalk(struct _reent *, void *);
@@ -37,14 +38,19 @@ void _fwalk(struct _reent *, void *);
 static void sync_wrapper(FILE *f)
 {
   int fn = fileno(f);
+  int rc;
 
   /*
-   *  We are explicitly NOT checking the return values as it does not
-   *  matter if they succeed.  We are just making a best faith attempt
-   *  at both and trusting that we were passed a good FILE pointer.
+   *  We are explicitly NOT checking the return values in non-debug builds
+   *  as it does not matter if they succeed.  We are just making a best
+   *  faith attempt at both and trusting that we were passed a good
+   *  FILE pointer.
    */
-  fsync(fn);
-  fdatasync(fn);
+  rc = fsync(fn);
+  _Assert( rc == 0 );
+
+  rc = fdatasync(fn);
+  _Assert( rc == 0 );
 }
 
 /* iterate over all FILE *'s for this thread */