diff packages/language/c/libc/current/src/stdio/common/fclose.cxx @ 0:3111d98ba7b3 ecos-v1_1-release

Initial commit of eCos version 1.1
author jlarmour
date Tue, 11 May 1999 11:16:07 +0000
parents
children 443894e2e912
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+++ b/packages/language/c/libc/current/src/stdio/common/fclose.cxx
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+//===========================================================================
+//
+//      fclose.cxx
+//
+//      Implementation of C library file close function as per ANSI 7.9.5.1
+//
+//===========================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// Software distributed under the License is distributed on an "AS IS"
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the
+// License for the specific language governing rights and limitations under
+// the License.
+// 
+// The Original Code is eCos - Embedded Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998 Cygnus Solutions.  All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//===========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):   jlarmour
+// Contributors:  jlarmour@cygnus.co.uk
+// Date:        1998-02-13
+// Purpose:     
+// Description: 
+// Usage:       
+//
+//####DESCRIPTIONEND####
+//
+//===========================================================================
+
+// CONFIGURATION
+
+#include <pkgconf/libc.h>   // Configuration header
+
+
+// Include the C library? And do we want the stdio stuff? And we can't have
+// fclose() without fopen()
+#if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_STDIO) && \
+    defined(CYGPKG_LIBC_STDIO_OPEN)
+
+// INCLUDES
+
+#include <cyg/infra/cyg_type.h>     // Common project-wide type definitions
+#include <stddef.h>                 // NULL and size_t from compiler
+#include <errno.h>                  // Error codes
+#include <stdio.h>                  // header for fclose()
+#include "clibincl/stdlibsupp.hxx"  // _free()
+#include "clibincl/clibdata.hxx"    // C library private data
+#include "clibincl/stream.hxx"      // C libray streams
+#include "clibincl/stdiosupp.hxx"   // support for stdio
+
+
+// EXPORTED SYMBOLS
+
+externC int
+fclose( FILE * ) CYGPRI_LIBC_WEAK_ALIAS("_fclose");
+
+
+// FUNCTIONS
+
+
+externC int
+_fclose( FILE *stream )
+{
+    Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stream;
+    int i;
+
+#ifdef CYGSEM_LIBC_STDIO_THREAD_SAFE_STREAMS
+    Cyg_CLibInternalData::files_lock.lock();
+#endif // CYGSEM_LIBC_STDIO_THREAD_SAFE_STREAMS
+
+    // find the stream in the table
+    for (i=0; i < FOPEN_MAX; i++)
+    {
+        if (real_stream == Cyg_CLibInternalData::get_file_stream(i))
+            break;
+    } // for
+
+    if (i == FOPEN_MAX) // didn't find it
+    {
+        errno = EBADF;
+
+        return EOF;
+    } // if
+
+    // Explicitly call destructor - this flushes the output too
+    real_stream->~Cyg_StdioStream();
+
+    // and free it
+    _free(real_stream);
+
+    // and mark the stream available for use
+    Cyg_CLibInternalData::set_file_stream(i, NULL);
+        
+#ifdef CYGSEM_LIBC_STDIO_THREAD_SAFE_STREAMS
+    Cyg_CLibInternalData::files_lock.unlock();
+#endif // CYGSEM_LIBC_STDIO_THREAD_SAFE_STREAMS
+
+    return 0;
+
+} // _fclose()
+        
+#endif // if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_STDIO) && 
+       //    defined(CYGPKG_LIBC_STDIO_OPEN)
+
+// EOF fclose.cxx