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coroutine.pmc
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coroutine.pmc
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/*
Copyright: 2001-2003 The Perl Foundation. All Rights Reserved.
$Id$
=head1 NAME
classes/coroutine.pmc - Co-Routine PMC
=head1 DESCRIPTION
C<Coroutine> extends C<Continuation> to provide a subroutine that can
stop in the middle, and start back up later at the point at which it
stopped. See the L<Glossary|docs/glossary.pod> for more information.
=head2 Methods
=over 4
=cut
*/
#include "parrot/parrot.h"
#include "parrot/method_util.h"
pmclass Coroutine extends Continuation {
/*
=item C<void init()>
Initializes the co-routine.
=cut
*/
void init () {
PMC_sub(SELF) = new_coroutine(INTERP);
PMC_struct_val(SELF) = NULL;
PObj_custom_mark_destroy_SETALL(SELF);
PObj_get_FLAGS(SELF) &= ~PObj_private0_FLAG;
}
/*
=item C<void *invoke(void *next)>
Swaps the "context".
=cut
*/
void* invoke (void* next) {
void * dest = PMC_struct_val(SELF);
PMC_struct_val(SELF) = next;
swap_context(interpreter, SELF);
return dest;
}
/*
=item C<void mark()>
Marks the coroutine as live.
=cut
*/
void mark () {
struct Parrot_Coroutine *c = (struct Parrot_Coroutine *)PMC_sub(SELF);
mark_stack(INTERP, c->co_control_stack);
mark_stack(INTERP, c->co_pad_stack);
SUPER(); /* mark rest */
}
}
/*
=back
=head1 HISTORY
Initial version by Melvin on 2002/06/6.
=cut
*/
/*
* Local variables:
* c-indentation-style: bsd
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*
* vim: expandtab shiftwidth=4:
*/