NAME

       avr_errno - <errno.h>: System Errors

SYNOPSIS

   Macros
       #define EDOM   33
       #define ERANGE   34

   Variables
       int errno

Detailed Description

       #include <errno.h>

       Some functions in the library set the global variable errno when an error occurs. The
       file, <errno.h>, provides symbolic names for various error codes.

Macro Definition Documentation

   #define EDOM   33
       Domain error.

   #define ERANGE   34
       Range error.

Variable Documentation

   int errno [extern]
       Error code for last error encountered by library. The variable errno holds the last error
       code encountered by a library function. This variable must be cleared by the user prior to
       calling a library function.

       Warning
           The errno global variable is not safe to use in a threaded or multi-task system. A
           race condition can occur if a task is interrupted between the call which sets error
           and when the task examines errno. If another task changes errno during this time, the
           result will be incorrect for the interrupted task.

Author

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