diff packages/language/c/libc/current/src/stdlib/exit.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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+//=========================================================================
+//
+//      exit.cxx
+//
+//      Implementation of the exit() function
+//
+//=========================================================================
+//####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:        1998-08-31
+// Purpose:     
+// Description: 
+// Usage:       
+//
+//####DESCRIPTIONEND####
+//
+//=========================================================================
+
+// CONFIGURATION
+
+#include <pkgconf/libc.h>   // Configuration header
+
+// Include the C library?
+#ifdef CYGPKG_LIBC     
+
+// INCLUDES
+
+#include <cyg/infra/cyg_type.h>    // Common type definitions and support
+#include <cyg/infra/cyg_trac.h>    // Common tracing support
+#include <cyg/infra/cyg_ass.h>     // Common assertion support
+#include <stdio.h>                 // fflush()
+#include <errno.h>                 // errno
+#include <stdlib.h>                // Header for all stdlib functions
+                                   // (like this one)
+#include "clibincl/stdlibsupp.hxx" // Support for stdlib functions
+
+// SYMBOLS
+
+externC void
+exit( int ) CYGPRI_LIBC_WEAK_ALIAS("__libc_exit") CYGPRI_LIBC_NORETURN;
+
+// FUNCTIONS
+
+externC void
+__libc_exit( int status )
+{
+    CYG_REPORT_FUNCTION(); // shouldn't return, but CYG_FAIL will catch it
+    CYG_REPORT_FUNCARG1DV( status );
+    
+    // Strictly the only thing exit() does is invoke the atexit handlers
+    // and flush stdio buffers. Anything else is for _exit() (aka
+    // __libc__exit() within the implementation)
+
+    // we start with the atexit handlers
+    cyg_libc_invoke_atexit_handlers();
+
+// we only need to flush stdio if we have buffered I/O.
+#if defined(CYGPKG_LIBC_STDIO) && \
+    defined(CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO)
+
+    int rc;
+
+    CYG_TRACE0( true, "Calling fflush( NULL )" );
+    rc = fflush( NULL );
+
+    CYG_TRACE2( rc != 0, "fflush() returned non-zero. It returned %d and "
+                "errno indicates the error: %s", rc, strerror(errno) );
+
+    
+#endif
+
+    __libc__exit( status );
+
+    CYG_FAIL( "__libc_exit() returning!!!" );
+
+    CYG_REPORT_RETURN();
+} // __libc_exit()
+
+
+#endif // ifdef CYGPKG_LIBC     
+
+// EOF exit.cxx