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