.TH "avr_errno" 3avr "Fri Jan 1 2021" "Version 2.0.0" "avr-libc" \" -*- nroff -*-
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.SH NAME
avr_errno \- <errno\&.h>: System Errors
.SH SYNOPSIS
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.PP
.SS "Macros"

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.RI "#define \fBEDOM\fP   33"
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.RI "#define \fBERANGE\fP   34"
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.SS "Variables"

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.ti -1c
.RI "int \fBerrno\fP"
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.SH "Detailed Description"
.PP 

.PP
.nf
#include <errno\&.h>

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.PP
.PP
Some functions in the library set the global variable \fCerrno\fP when an error occurs\&. The file, \fC<\fBerrno\&.h\fP>\fP, provides symbolic names for various error codes\&. 
.SH "Macro Definition Documentation"
.PP 
.SS "#define EDOM   33"
Domain error\&. 
.SS "#define ERANGE   34"
Range error\&. 
.SH "Variable Documentation"
.PP 
.SS "int errno\fC [extern]\fP"

.PP
Error code for last error encountered by library\&. The variable \fCerrno\fP holds the last error code encountered by a library function\&. This variable must be cleared by the user prior to calling a library function\&.
.PP
\fBWarning\fP
.RS 4
The \fCerrno\fP 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 \fCerror\fP and when the task examines \fCerrno\fP\&. If another task changes \fCerrno\fP during this time, the result will be incorrect for the interrupted task\&. 
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.SH "Author"
.PP 
Generated automatically by Doxygen for avr-libc from the source code\&.