errno.h

ecos为实时嵌入式操作系统

#ifndef CYGONCE_LIBC_ERRNO_H
#define CYGONCE_LIBC_ERRNO_H
//========================================================================
//
//      errno.h
//
//      ISO C errno variable and constants
//
//========================================================================
//####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) 1998,1999 Cygnus Solutions.  All Rights Reserved.
// -------------------------------------------
//
//####COPYRIGHTEND####
//========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):     jlarmour
// Contributors:  jlarmour
// Date:          1999-01-21
// Purpose:       This file provides the errno variable (or more strictly
//                expression) and the E* error codes required by ISO C
//                and POSIX 1003.1
// Description: 
// Usage:         #include <errno.h>
//
//####DESCRIPTIONEND####
//
//========================================================================

// CONFIGURATION

#include <pkgconf/libc.h>          // Configuration header

// INCLUDES

#include <cyg/infra/cyg_type.h>    // Common type definitions etc.
#include <cyg/error/codes.h>       // Common error code definitions

// FUNCTION PROTOTYPES

#ifdef CYGSEM_LIBC_PER_THREAD_ERRNO

externC Cyg_ErrNo * const
cyg_libc_get_errno_p( void ) CYGBLD_ATTRIB_CONST;

#endif // ifdef CYGSEM_LIBC_PER_THREAD_ERRNO

// VARIABLES

#ifdef CYGSEM_LIBC_PER_THREAD_ERRNO

# define errno (*cyg_libc_get_errno_p())  // Global error status

#else

externC Cyg_ErrNo errno;            // Global error status

#endif // ifdef CYGSEM_LIBC_PER_THREAD_ERRNO


#endif // CYGONCE_LIBC_ERRNO_H multiple inclusion protection

// EOF errno.h