diff options
Diffstat (limited to 'cpukit/score/include/rtems/seterr.h')
| -rw-r--r-- | cpukit/score/include/rtems/seterr.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/cpukit/score/include/rtems/seterr.h b/cpukit/score/include/rtems/seterr.h index 9e5ebe931e..2548258d87 100644 --- a/cpukit/score/include/rtems/seterr.h +++ b/cpukit/score/include/rtems/seterr.h @@ -6,7 +6,7 @@ */ /* - * COPYRIGHT (c) 1989-2004. + * COPYRIGHT (c) 1989-2006. * On-Line Applications Research Corporation (OAR). * * The license and distribution terms for this file may be @@ -19,9 +19,25 @@ #ifndef _RTEMS_SETERR_H #define _RTEMS_SETERR_H +/** + * This is a helper macro which will set the variable errno and return + * -1 to the caller. This pattern is common to many POSIX methods. + * + * @param[in] _error is the error code + */ #define rtems_set_errno_and_return_minus_one( _error ) \ do { errno = (_error); return -1; } while(0) +/** + * This is a helper macro which will set the variable errno and return + * -1 to the caller. This pattern is common to many POSIX methods. + * + * @param[in] _error is the error code + * @param[in] _cast is the type to which -1 must be cast + * + * @note It is similar to @ref rtems_set_errno_and_return_minus_one but + * this -1 value is cast to something other than an int. + */ #define rtems_set_errno_and_return_minus_one_cast( _error, _cast ) \ do { errno = (_error); return (_cast) -1; } while(0) |