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exit.c
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exit.c
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/*
Copyright (C) 2001-2009, Parrot Foundation.
$Id$
=head1 NAME
src/exit.c - Exit Handling
=head1 DESCRIPTION
Parrot's version of C<exit()>, C<on_exit()>, and friends.
C<Parrot_on_exit()> allows you register exit handlers which will be
called by C<Parrot_exit()> when the interpreter exits.
=head2 Functions
=over 4
=cut
*/
#include <stdlib.h>
#include "parrot/parrot.h"
/* HEADERIZER HFILE: include/parrot/exit.h */
/*
=item C<void Parrot_on_exit(PARROT_INTERP, exit_handler_f function, void *arg)>
Register the specified function to be called on exit.
=cut
*/
PARROT_EXPORT
void
Parrot_on_exit(PARROT_INTERP, NOTNULL(exit_handler_f function), ARGIN_NULLOK(void *arg))
{
ASSERT_ARGS(Parrot_on_exit)
/* RT#46403 we might want locking around the list access. I'm sure this
* will be the least of the threading issues. */
handler_node_t * const new_node = mem_allocate_typed(handler_node_t);
new_node->function = function;
new_node->arg = arg;
new_node->next = interp->exit_handler_list;
interp->exit_handler_list = new_node;
}
/*
=item C<void Parrot_exit(PARROT_INTERP, int status)>
Exit, calling any registered exit handlers.
=cut
*/
PARROT_EXPORT
PARROT_DOES_NOT_RETURN
void
Parrot_exit(PARROT_INTERP, int status)
{
ASSERT_ARGS(Parrot_exit)
/* call all the exit handlers */
/* we are well "below" the runloop now, where lo_var_ptr
* is set usually - exit handlers may run some resource-hungry
* stuff like printing profile stats - a GC run would kill
* resources - RT#46405 reset stacktop or better disable GC
*/
/*
* we don't allow new exit_handlers being installed inside exit handlers
* - do we?
* and: interp->exit_handler_list is gone, after the last exit handler
* (Parrot_really_destroy) has run
*/
handler_node_t *node = interp->exit_handler_list;
Parrot_block_GC_mark(interp);
Parrot_block_GC_sweep(interp);
while (node) {
handler_node_t * const next = node->next;
(node->function)(interp, status, node->arg);
mem_sys_free(node);
node = next;
}
exit(status);
}
/*
=back
=head1 SEE ALSO
F<include/parrot/exit.h> and F<t/src/exit.t>.
=head1 HISTORY
Initial version by Josh Wilmes.
=cut
*/
/*
* Local variables:
* c-file-style: "parrot"
* End:
* vim: expandtab shiftwidth=4:
*/