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task.pmc
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task.pmc
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/*
Copyright (C) 2001-2007, The Perl Foundation.
$Id$
=head1 NAME
src/pmc/task.pmc - A concurrent task
=head1 DESCRIPTION
Implements the basic task behavior for the concurrency scheduler.
=head2 Functions
=over 4
=cut
*/
#include "parrot/parrot.h"
pmclass Task need_ext {
/*
=item C<void init()>
Initialize a concurrency task object.
=cut
*/
void init() {
Parrot_Task *core_struct = mem_allocate_zeroed_typed(Parrot_Task);
/* Set flags for custom DOD mark and destroy. */
PObj_custom_mark_SET(SELF);
PObj_active_destroy_SET(SELF);
/* Set up the core struct. */
PMC_data(SELF) = core_struct;
core_struct->id = 0;
core_struct->type = CONST_STRING(interp, "");
core_struct->priority = CONST_STRING(interp, "");
core_struct->status = CONST_STRING(interp, "created");
core_struct->birthtime = 0;
core_struct->codeblock = PMCNULL;
core_struct->interp = PMCNULL;
}
/*
=item C<PMC *get_attr_str(STRING *name)>
Gets the value of an attribute for this task.
=cut
*/
PMC *get_attr_str(STRING *name) {
Parrot_Task * core_struct = PARROT_TASK(SELF);
PMC *value = PMCNULL;
if (string_equal(interp, name, CONST_STRING(interp, "id")) == 0) {
value = pmc_new(interp, enum_class_Integer);
VTABLE_set_integer_native(interp, value, core_struct->id);
}
else if (string_equal(interp, name, CONST_STRING(interp, "type")) == 0) {
value = pmc_new(interp, enum_class_String);
VTABLE_set_string_native(interp, value, core_struct->type);
}
else if (string_equal(interp, name, CONST_STRING(interp, "priority")) == 0) {
value = pmc_new(interp, enum_class_String);
VTABLE_set_string_native(interp, value, core_struct->priority);
}
else if (string_equal(interp, name, CONST_STRING(interp, "status")) == 0) {
value = pmc_new(interp, enum_class_String);
VTABLE_set_string_native(interp, value, core_struct->status);
}
else if (string_equal(interp, name, CONST_STRING(interp, "birthtime")) == 0) {
value = pmc_new(interp, enum_class_Integer);
VTABLE_set_integer_native(interp, value, core_struct->birthtime);
}
return value;
}
/*
=item C<void set_attr_str(STRING *name, PMC *value)>
Sets the value of an attribute for this task.
=cut
*/
void set_attr_str(STRING *name, PMC *value) {
Parrot_Task * core_struct = PARROT_TASK(SELF);
if (string_equal(interp, name, CONST_STRING(interp, "id")) == 0) {
core_struct->id = VTABLE_get_integer(interp, value);
}
else if (string_equal(interp, name, CONST_STRING(interp, "type")) == 0) {
core_struct->type = VTABLE_get_string(interp, value);
}
else if (string_equal(interp, name, CONST_STRING(interp, "priority")) == 0) {
core_struct->priority = VTABLE_get_string(interp, value);
}
else if (string_equal(interp, name, CONST_STRING(interp, "status")) == 0) {
core_struct->status = VTABLE_get_string(interp, value);
}
else if (string_equal(interp, name, CONST_STRING(interp, "birthtime")) == 0) {
core_struct->birthtime = VTABLE_get_integer(interp, value);
}
}
/*
=item C<void destroy()>
Free the task's underlying struct.
=cut
*/
void destroy() {
mem_sys_free(PMC_data(SELF));
}
/*
=item C<void mark()>
Mark any referenced strings and PMCs.
=cut
*/
void mark() {
if (PARROT_TASK(SELF)) {
Parrot_Task * const core_struct = PARROT_TASK(SELF);
if (core_struct->codeblock)
pobject_lives(interp, (PObj*)core_struct->codeblock);
if (core_struct->interp)
pobject_lives(interp, (PObj*)core_struct->interp);
}
}
/*
=item C<void visit(visit_info *info)>
This is used by freeze/thaw to visit the contents of the task.
C<*info> is the visit info, (see F<include/parrot/pmc_freeze.h>).
=cut
*/
void visit(visit_info *info) {
INTVAL i, n;
Parrot_Task * core_struct = PARROT_TASK(SELF);
PMC **pos;
/* 1) visit code block */
pos = &core_struct->codeblock;
info->thaw_ptr = pos;
(info->visit_pmc_now)(INTERP, *pos, info);
/* 2) visit the interpreter structure */
pos = &core_struct->interp;
info->thaw_ptr = pos;
(info->visit_pmc_now)(INTERP, *pos, info);
}
/*
=item C<void freeze(visit_info *info)>
Used to archive the task.
=cut
*/
void freeze(visit_info *info) {
IMAGE_IO *io = info->image_io;
Parrot_Task * const core_struct = PARROT_TASK(SELF);
/* 1) freeze task id */
VTABLE_push_integer(INTERP, io, core_struct->id);
/* 2) freeze task birthtime */
VTABLE_push_integer(INTERP, io, core_struct->birthtime);
/* 3) freeze task type */
VTABLE_push_string(INTERP, io, core_struct->type);
/* 4) freeze task priority */
VTABLE_push_string(INTERP, io, core_struct->priority);
/* 5) freeze task status */
VTABLE_push_string(INTERP, io, core_struct->status);
}
/*
=item C<void thaw(visit_info *info)>
Used to unarchive the task.
=cut
*/
void thaw(visit_info *info) {
IMAGE_IO *io = info->image_io;
/* 1. thaw task id */
INTVAL id = VTABLE_shift_integer(INTERP, io);
/* 2. thaw task birthtime */
INTVAL birthtime = VTABLE_shift_integer(INTERP, io);
/* 3. thaw task type */
STRING *type = VTABLE_shift_string(INTERP, io);
/* 4. thaw task priority */
STRING *priority = VTABLE_shift_string(INTERP, io);
/* 5. thaw task status */
STRING *status = VTABLE_shift_string(INTERP, io);
/* Allocate the task's core data struct and set custom flags. */
SELF.init();
/* Set the task's id to the frozen id */
PARROT_TASK(SELF)->id = id;
/* Set the task's birthtime to the frozen birthtime */
PARROT_TASK(SELF)->birthtime = birthtime;
/* Set the task's type to the frozen type */
PARROT_TASK(SELF)->type = type;
/* Set the task's priority to the frozen priority */
PARROT_TASK(SELF)->priority = priority;
/* Set the task's status to the frozen status */
PARROT_TASK(SELF)->status = status;
}
/*
=item C<void thawfinish(visit_info *info)>
Called after the task has been thawed.
=cut
*/
void thawfinish(visit_info *info) {
Parrot_Task * core_struct = PARROT_TASK(SELF);
/* TODO: Rebuild the task index. */
}
}
/*
=back
=head1 SEE ALSO
F<docs/pdds/pdd15_objects.pod>.
=cut
*/
/*
* Local variables:
* c-file-style: "parrot"
* End:
* vim: expandtab shiftwidth=4:
*/