\" $NetBSD: pthread_cleanup_push.3,v 1.6 2010/07/09 08:51:28 jruoho Exp $
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\" $FreeBSD: src/lib/libpthread/man/pthread_cleanup_push.3,v 1.11 2002/09/16 19:29:28 mini Exp $
\"
Dd July 9, 2010
Dt PTHREAD_CLEANUP 3
Os
Sh NAME
Nm pthread_cleanup_push ,
Nm pthread_cleanup_pop
Nd add and remove cleanup functions for thread exit
Sh LIBRARY
Lb libpthread
Sh SYNOPSIS
In pthread.h
Ft void
Fn pthread_cleanup_push "void \*[lp]*cleanup_routine\*[rp]\*[lp]void *\*[rp]" "void *arg"
Ft void
Fn pthread_cleanup_pop "int execute"
Sh DESCRIPTION
The
Fn pthread_cleanup_push
function adds
Fa cleanup_routine
to the top of the stack of cleanup handlers that
get called when the current thread exits.
Pp
The
Fn pthread_cleanup_pop
function pops the top cleanup routine off of the current threads cleanup
routine stack, and, if
Fa execute
is non-zero, it will execute the function.
Pp
When
Fa cleanup_routine
is called, it is passed
Fa arg
as its only argument.
Pp
These functions may be implemented as macros which contain scope delimiters;
therefore, there must be a matching
Fn pthread_cleanup_pop
for every
Fn pthread_cleanup_push
at the same level of lexical scoping.
Pp
The effect of calling
Fn longjmp
or
Fn siglongjmp
is undefined after a call to
Fn pthread_cleanup_push
but before the matching call to
Fn pthread_cleanup_pop
after the jump buffer was filled.
Sh RETURN VALUES
Neither
Fn pthread_cleanup_push
nor
Fn pthread_cleanup_pop
returns a value.
Sh ERRORS
None.
Sh SEE ALSO
Xr pthread_exit 3
Sh STANDARDS
Both functions conform to
St -p1003.1-2001 .

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