errno.c

来自「xilinx内嵌CPU下的UCOS移植」· C语言 代码 · 共 33 行

/******************************************************************** 
 *
 *     XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
 *     SOLELY FOR USE IN DEVELOPING PROGRAMS AND SOLUTIONS FOR
 *     XILINX DEVICES.  BY PROVIDING THIS DESIGN, CODE, OR INFORMATION
 *     AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION
 *     OR STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS
 *     IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
 *     AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
 *     FOR YOUR IMPLEMENTATION.  XILINX EXPRESSLY DISCLAIMS ANY
 *     WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
 *     IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
 *     REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
 *     INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *     FOR A PARTICULAR PURPOSE.
 *     
 *     (c) Copyright 2006 Xilinx, Inc.
 *     All rights reserved.
 *
 * The errno variable is stored in the reentrancy structure.  This
 * function returns its address for use by the macro errno defined in
 * errno.h.  
 ********************************************************************/

#include <errno.h>
#include <reent.h>

int *
__errno ()
{
  return &_REENT->_errno;
}