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<HTML
><HEAD
><TITLE
>sem_timedwait</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.64
"></HEAD
><BODY
CLASS="REFENTRY"
><H1
><A
NAME="AEN1"
>sem_timedwait</A
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN5"
></A
><H2
>Name</H2
>sem_timedwait -- lock a semaphore with a timeout</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN8"
></A
><H2
>Synopsis</H2
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="SYNOPSIS"
> #include <semaphore.h>
int <TT
CLASS="FUNCTION"
>sem_timedwait</TT
>(sem_t *<TT
CLASS="PARAMETER"
><I
>sem</I
></TT
>, const struct timespec *<TT
CLASS="PARAMETER"
><I
>abs_timeout</I
></TT
>);</PRE
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN13"
></A
><H2
>DESCRIPTION</H2
><P
> The <TT
CLASS="FUNCTION"
>sem_timedwait</TT
> function locks the semaphore referenced by <TT
CLASS="PARAMETER"
><I
>sem</I
></TT
> like <TT
CLASS="FUNCTION"
>sem_wait</TT
>.
If the semaphore is not locked at the time specified by the
<TT
CLASS="PARAMETER"
><I
>abs_timeout</I
></TT
>, <TT
CLASS="FUNCTION"
>sem_timedwait</TT
> returns
with the <TT
CLASS="PARAMETER"
><I
>ETIMEDOUT</I
></TT
> error.
The absolute timeout is expressed with respect to the
<TT
CLASS="PARAMETER"
><I
>CLOCK_REALTIME</I
></TT
> clock.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN23"
></A
><H2
>RETURN VALUE</H2
><P
>On success, zero is returned. On error, -1 is returned, and errno is set
appropriately.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN26"
></A
><H2
>ERRORS</H2
><P
>All error values of <TT
CLASS="FUNCTION"
>sem_wait</TT
> apply.
In addition, the following errors defined.</P
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
>ETIMEDOUT</DT
><DD
><P
>The semaphore lock operation timed out.</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN35"
></A
><H2
>AUTHOR</H2
><P
>Michael Barabanov (<A
HREF="mailto:baraban@fsmlabs.com"
TARGET="_top"
>baraban@fsmlabs.com</A
>)</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN39"
></A
><H2
>SEE ALSO</H2
><A
HREF="../susv2/xsh/sem_wait.html"
TARGET="_top"
>sem_wait(3)</A
>, <A
HREF="../susv2/xsh/clock_gettime.html"
TARGET="_top"
>clock_gettime(3)</A
><P
>2001 FSMLabs Inc.</P
><P
>All rights reserved.</P
></DIV
></BODY
></HTML
>
|
