1 files changed, 115 insertions, 0 deletions
diff --git a/StdLib/LibC/Stdio/fflush.c b/StdLib/LibC/Stdio/fflush.c
new file mode 100644
index 0000000000..fd21e37a13
--- /dev/null
+++ b/StdLib/LibC/Stdio/fflush.c
@@ -0,0 +1,115 @@
+/** @file
+    Implementation of fflush as declared in <stdio.h>.
+
+    Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
+    This program and the accompanying materials are licensed and made available
+    under the terms and conditions of the BSD License that accompanies this
+    distribution.  The full text of the license may be found at
+    http://opensource.org/licenses/bsd-license.php.
+
+    THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+    WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+    Copyright (c) 1990, 1993
+    The Regents of the University of California.  All rights reserved.
+
+    This code is derived from software contributed to Berkeley by
+    Chris Torek.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+      - Redistributions of source code must retain the above copyright
+        notice, this list of conditions and the following disclaimer.
+      - Redistributions in binary form must reproduce the above copyright
+        notice, this list of conditions and the following disclaimer in the
+        documentation and/or other materials provided with the distribution.
+      - Neither the name of the University nor the names of its contributors
+        may be used to endorse or promote products derived from this software
+        without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+    POSSIBILITY OF SUCH DAMAGE.
+
+    NetBSD: fflush.c,v 1.15 2003/08/07 16:43:22 agc Exp
+    fflush.c  8.1 (Berkeley) 6/4/93
+**/
+#include  <LibConfig.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include "reentrant.h"
+#include "local.h"
+
+#ifdef _REENTRANT
+extern rwlock_t __sfp_lock;
+#endif
+
+/* Flush a single file, or (if fp is NULL) all files.  */
+int
+fflush(FILE *fp)
+{
+  int r;
+
+  if (fp == NULL) {
+    rwlock_rdlock(&__sfp_lock);
+    r = _fwalk(__sflush);
+    rwlock_unlock(&__sfp_lock);
+    return r;
+  }
+
+  FLOCKFILE(fp);
+  if ((fp->_flags & (__SWR | __SRW)) == 0) {
+    errno = EBADF;
+    r = EOF;
+  } else {
+    r = __sflush(fp);
+  }
+  FUNLOCKFILE(fp);
+  return r;
+}
+
+int
+__sflush(FILE *fp)
+{
+  unsigned char *p;
+  INT64 n;
+  int   t;
+
+  _DIAGASSERT(fp != NULL);
+
+  t = fp->_flags;
+  if ((t & __SWR) == 0)
+    return (0);
+
+  if ((p = fp->_bf._base) == NULL)
+    return (0);
+
+  n = fp->_p - p;   /* write this much */
+
+  /*
+   * Set these immediately to avoid problems with longjmp and to allow
+   * exchange buffering (via setvbuf) in user write function.
+   */
+  fp->_p = p;
+  fp->_w = t & (__SLBF|__SNBF) ? 0 : fp->_bf._size;
+
+  for (; n > 0; n -= t, p += t) {
+    t = (*fp->_write)(fp->_cookie, (char *)p, (int)n);
+    if (t <= 0) {
+      fp->_flags |= __SERR;
+      return (EOF);
+    }
+  }
+  return (0);
+}