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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *  * Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  *  * Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in
     12  *    the documentation and/or other materials provided with the
     13  *    distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
     18  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
     19  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
     22  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     25  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 #ifndef _ERRNO_H
     29 #define _ERRNO_H
     30 
     31 #include <sys/cdefs.h>
     32 #include <linux/errno.h>
     33 
     34 __BEGIN_DECLS
     35 
     36 /* on Linux, ENOTSUP and EOPNOTSUPP are defined as the same error code
     37  * even if 1000.3 states that they should be different
     38  */
     39 #ifndef  ENOTSUP
     40 #define  ENOTSUP  EOPNOTSUPP
     41 #endif
     42 
     43 /* internal function that should *only* be called from system calls */
     44 /* use errno = xxxx instead in C code                               */
     45 extern int    __set_errno(int  error);
     46 
     47 /* internal function returning the address of the thread-specific errno */
     48 extern volatile int*   __errno(void);
     49 
     50 /* a macro expanding to the errno l-value */
     51 #define  errno   (*__errno())
     52 
     53 __END_DECLS
     54 
     55 #endif /* _ERRNO_H */
     56