PDCLIB-16: Add _unlocked variations of all I/O routines; move work into these versions

[pdclib] / functions / stdio / fwrite.c

diff --git a/functions/stdio/fwrite.c b/functions/stdio/fwrite.c
index 89e9c03944f1c86a8cc11d2e0431b845d6e707d4..9ab8a0abfb1380df315f5565edd7c5b1d5a30871 100644 (file)
--- a/functions/stdio/fwrite.c
+++ b/functions/stdio/fwrite.c
@@ -17,7 +17,9 @@
 
 //TODO OS(2012-08-01): Ascertain purpose of lineend & potentially remove
 
-size_t fwrite( const void * _PDCLIB_restrict ptr, size_t size, size_t nmemb, struct _PDCLIB_file_t * _PDCLIB_restrict stream )
+size_t fwrite_unlocked( const void * _PDCLIB_restrict ptr, 
+               size_t size, size_t nmemb, 
+               struct _PDCLIB_file_t * _PDCLIB_restrict stream )
 {
     if ( _PDCLIB_prepwrite( stream ) == EOF )
     {
@@ -44,6 +46,12 @@ size_t fwrite( const void * _PDCLIB_restrict ptr, size_t size, size_t nmemb, str
                     return nmemb_i;
                 }
                 //lineend = false;
+                /*
+                 * The entire buffer has been flushed; this means we have to
+                 * reset our newline position as we have already written
+                 * that part of the stream.
+                 */
+                offset = 0;
             }
         }
     }
@@ -82,6 +90,16 @@ size_t fwrite( const void * _PDCLIB_restrict ptr, size_t size, size_t nmemb, str
     return nmemb_i;
 }
 
+size_t fwrite( const void * _PDCLIB_restrict ptr, 
+               size_t size, size_t nmemb, 
+               struct _PDCLIB_file_t * _PDCLIB_restrict stream )
+{
+    flockfile( stream );
+    size_t r = fwrite_unlocked( ptr, size, nmemb, stream );
+    funlockfile( stream );
+    return r;
+}
+
 #endif
 
 #ifdef TEST