Mercurial > ecos
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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new file mode 100644 --- /dev/null +++ b/packages/language/c/libc/current/src/stdio/common/fclose.cxx @@ -0,0 +1,118 @@ +//=========================================================================== +// +// 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
