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task.pmc
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task.pmc
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/*
Copyright (C) 2001-2008, Parrot 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/scheduler_private.h"
pmclass Task auto_attrs {
ATTR INTVAL id; /* The task ID. */
ATTR INTVAL priority; /* The priority of the task. */
ATTR FLOATVAL birthtime; /* The creation time stamp of the task. */
ATTR STRING *type; /* The type of the task. */
ATTR STRING *subtype; /* The subtype of the task. */
ATTR STRING *status; /* The status of the task. */
ATTR Parrot_Interp interp; /* The interpreter that created the task. */
ATTR PMC *codeblock; /* An (optional) codeblock for the task. */
ATTR PMC *data; /* Additional data for the task. */
ATTR char *cb_data; /* Additional data for a callback event. */
/*
=item C<void init()>
Initialize a concurrency task object.
=cut
*/
VTABLE void init() {
Parrot_Task_attributes * const core_struct =
(Parrot_Task_attributes *) PMC_data(SELF);
/* Set flags for custom GC mark. */
PObj_custom_mark_SET(SELF);
/* Set up the core struct. */
core_struct->id = 0;
core_struct->type = CONST_STRING(interp, "");
core_struct->subtype = CONST_STRING(interp, "");
core_struct->priority = 0;
core_struct->status = CONST_STRING(interp, "created");
core_struct->birthtime = 0.0;
core_struct->codeblock = PMCNULL;
core_struct->data = PMCNULL;
core_struct->interp = INTERP;
/* Make sure the flag is cleared by default */
TASK_terminate_runloop_CLEAR(SELF);
}
/*
=item C<void init_pmc(PMC *data)>
Initializes a new Task with a C<Hash> PMC with any or all of the keys:
=over 4
=item C<id>
An C<Integer> representing the task's unique identifier.
=item C<type>
A C<String> representing the type of the task.
=item C<subtype>
A C<String> representing the subtype of the task. (Used mostly by events and
exceptions to identify appropriate handlers.)
=item C<priority>
An C<Integer> representing the task's priority, from 0 to 100.
=item C<status>
A C<String> representing the task's status, one of C<created>, C<invoked>,
C<inprocess>, or C<completed>.
=item C<birthtime>
The time at which this Task was inserted into the task list.
=item C<code>
A C<Sub> or descendant PMC related to this task.
=item C<interp>
An interpreter in which to execute this task.
=back
=cut
*/
VTABLE void init_pmc(PMC *data) {
PMC *elem;
Parrot_Task_attributes *core_struct;
if (! VTABLE_isa(INTERP, data, CONST_STRING(INTERP, "Hash")))
Parrot_ex_throw_from_c_args(INTERP, NULL, EXCEPTION_INVALID_OPERATION,
"Task initializer must be a Hash");
core_struct = (Parrot_Task_attributes *) PMC_data(SELF);
/* Set flags for custom GC mark. */
PObj_custom_mark_SET(SELF);
/* Set up the core struct. */
elem = VTABLE_get_pmc_keyed_str(INTERP, data, CONST_STRING(INTERP, "id"));
if (! PMC_IS_NULL(elem))
core_struct->id = VTABLE_get_integer(INTERP, elem);
else
core_struct->id = 0;
elem = VTABLE_get_pmc_keyed_str(INTERP, data, CONST_STRING(INTERP, "type"));
if (! PMC_IS_NULL(elem))
core_struct->type = VTABLE_get_string(INTERP, elem);
else
core_struct->type = CONST_STRING(INTERP, "");
elem = VTABLE_get_pmc_keyed_str(INTERP, data, CONST_STRING(INTERP, "subtype"));
if (! PMC_IS_NULL(elem))
core_struct->subtype = VTABLE_get_string(INTERP, elem);
else
core_struct->subtype = CONST_STRING(INTERP, "");
elem = VTABLE_get_pmc_keyed_str(INTERP, data, CONST_STRING(INTERP, "priority"));
if (! PMC_IS_NULL(elem))
core_struct->priority = VTABLE_get_integer(INTERP, elem);
else
core_struct->priority = 0;
elem = VTABLE_get_pmc_keyed_str(INTERP, data, CONST_STRING(INTERP, "status"));
if (! PMC_IS_NULL(elem))
core_struct->status = VTABLE_get_string(INTERP, elem);
else
core_struct->status = CONST_STRING(INTERP, "created");
elem = VTABLE_get_pmc_keyed_str(INTERP, data, CONST_STRING(INTERP, "birthtime"));
if (! PMC_IS_NULL(elem))
core_struct->birthtime = VTABLE_get_number(INTERP, elem);
else
core_struct->birthtime = 0.0;
core_struct->codeblock = VTABLE_get_pmc_keyed_str(INTERP, data, CONST_STRING(INTERP, "code"));
core_struct->interp = (Parrot_Interp)VTABLE_get_pmc_keyed_str(INTERP, data, CONST_STRING(INTERP, "data"));
}
/*
=item C<PMC *clone()>
Create a copy of the task, resetting status, ID, and birthtime.
=cut
*/
VTABLE PMC *clone() {
/* Create the new task PMC, of the same type of this one (we may
* have been subclassed). */
PMC * const copy = pmc_new(interp, SELF->vtable->base_type);
Parrot_Task_attributes * const new_struct = PARROT_TASK(copy);
Parrot_Task_attributes * const old_struct = PARROT_TASK(SELF);
new_struct->codeblock = VTABLE_clone(interp, old_struct->codeblock);
new_struct->data = old_struct->data;
new_struct->type = old_struct->type;
new_struct->subtype = old_struct->subtype;
new_struct->priority = old_struct->priority;
return copy;
}
/*
=item C<PMC *get_attr_str(STRING *name)>
Gets the value of an attribute for this task.
=cut
*/
VTABLE PMC *get_attr_str(STRING *name) {
Parrot_Task_attributes * const core_struct = PARROT_TASK(SELF);
PMC *value;
if (Parrot_str_equal(interp, name, CONST_STRING(interp, "id"))) {
value = pmc_new(interp, enum_class_Integer);
VTABLE_set_integer_native(interp, value, core_struct->id);
}
else if (Parrot_str_equal(interp, name, CONST_STRING(interp, "type"))) {
value = pmc_new(interp, enum_class_String);
VTABLE_set_string_native(interp, value, core_struct->type);
}
else if (Parrot_str_equal(interp, name, CONST_STRING(interp, "subtype"))) {
value = pmc_new(interp, enum_class_String);
VTABLE_set_string_native(interp, value, core_struct->subtype);
}
else if (Parrot_str_equal(interp, name, CONST_STRING(interp, "priority"))) {
value = pmc_new(interp, enum_class_Integer);
VTABLE_set_integer_native(interp, value, core_struct->priority);
}
else if (Parrot_str_equal(interp, name, CONST_STRING(interp, "status"))) {
value = pmc_new(interp, enum_class_String);
VTABLE_set_string_native(interp, value, core_struct->status);
}
else if (Parrot_str_equal(interp, name, CONST_STRING(interp, "birthtime"))) {
value = pmc_new(interp, enum_class_Float);
VTABLE_set_number_native(interp, value, core_struct->birthtime);
}
else {
value = PMCNULL;
}
return value;
}
/*
=item C<void set_attr_str(STRING *name, PMC *value)>
Sets the value of an attribute for this task.
=cut
*/
VTABLE void set_attr_str(STRING *name, PMC *value) {
Parrot_Task_attributes * const core_struct = PARROT_TASK(SELF);
if (Parrot_str_equal(interp, name, CONST_STRING(interp, "id"))) {
core_struct->id = VTABLE_get_integer(interp, value);
}
else if (Parrot_str_equal(interp, name, CONST_STRING(interp, "type"))) {
core_struct->type = VTABLE_get_string(interp, value);
}
else if (Parrot_str_equal(interp, name, CONST_STRING(interp, "subtype"))) {
core_struct->subtype = VTABLE_get_string(interp, value);
}
else if (Parrot_str_equal(interp, name, CONST_STRING(interp, "priority"))) {
core_struct->priority = VTABLE_get_integer(interp, value);
}
else if (Parrot_str_equal(interp, name, CONST_STRING(interp, "status"))) {
core_struct->status = VTABLE_get_string(interp, value);
}
else if (Parrot_str_equal(interp, name, CONST_STRING(interp, "birthtime"))) {
core_struct->birthtime = VTABLE_get_number(interp, value);
}
else if (Parrot_str_equal(interp, name, CONST_STRING(interp, "code"))) {
core_struct->codeblock = value;
}
else if (Parrot_str_equal(interp, name, CONST_STRING(interp, "data"))) {
core_struct->data = value;
}
}
/*
=item C<INTVAL get_integer()>
Retrieves the task ID for this task.
=cut
*/
VTABLE INTVAL get_integer() {
const Parrot_Task_attributes * const core_struct = PARROT_TASK(SELF);
return core_struct->id;
}
/*
=item C<void set_integer_native(INTVAL value)>
Sets the task ID of the task.
=cut
*/
VTABLE void set_integer_native(INTVAL value) {
Parrot_Task_attributes * const core_struct = PARROT_TASK(SELF);
core_struct->id = value;
}
/*
=item C<void set_number_native(FLOATVAL value)>
Sets the birthtime of the task.
=cut
*/
VTABLE void set_number_native(FLOATVAL value) {
Parrot_Task_attributes * const core_struct = PARROT_TASK(SELF);
core_struct->birthtime = value;
}
/*
=item C<void set_string_native(STRING *value)>
Sets the type of the task.
=cut
*/
VTABLE void set_string_native(STRING *value) {
Parrot_Task_attributes * const core_struct = PARROT_TASK(SELF);
core_struct->type = value;
}
/*
=item C<PMC *share_ro()>
Set this PMC as shared.
=cut
*/
VTABLE PMC *share_ro() {
PMC *shared_self;
Parrot_Task_attributes *shared_struct;
if (PObj_is_PMC_shared_TEST(SELF))
return SELF;
shared_self = pt_shared_fixup(INTERP, SELF);
shared_struct = PARROT_TASK(shared_self);
if (!PMC_IS_NULL(shared_struct->codeblock))
shared_struct->codeblock = pt_shared_fixup(INTERP, shared_struct->codeblock);
if (!PMC_IS_NULL(shared_struct->data))
shared_struct->data = pt_shared_fixup(INTERP, shared_struct->data);
return shared_self;
}
/*
=item C<void mark()>
Mark any referenced strings and PMCs.
=cut
*/
VTABLE void mark() {
if (PARROT_TASK(SELF)) {
Parrot_Task_attributes * const core_struct = PARROT_TASK(SELF);
if (core_struct->codeblock)
Parrot_gc_mark_PObj_alive(interp, (PObj*)core_struct->codeblock);
if (core_struct->data)
Parrot_gc_mark_PObj_alive(interp, (PObj*)core_struct->data);
}
}
/*
=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
*/
VTABLE void visit(visit_info *info) {
Parrot_Task_attributes * const 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);
}
/*
=item C<void freeze(visit_info *info)>
Used to archive the task.
=cut
*/
VTABLE void freeze(visit_info *info) {
IMAGE_IO * const io = info->image_io;
const Parrot_Task_attributes * const core_struct = PARROT_TASK(SELF);
/* 1) freeze task id */
VTABLE_push_integer(INTERP, io, core_struct->id);
/* 2) freeze task birthtime */
VTABLE_push_float(INTERP, io, core_struct->birthtime);
/* 3) freeze task priority */
VTABLE_push_integer(INTERP, io, core_struct->priority);
/* 4) freeze task type */
VTABLE_push_string(INTERP, io, core_struct->type);
/* 5) freeze task subtype */
VTABLE_push_string(INTERP, io, core_struct->subtype);
/* 6) freeze task status */
VTABLE_push_string(INTERP, io, core_struct->status);
}
/*
=item C<void thaw(visit_info *info)>
Used to unarchive the task.
=cut
*/
VTABLE void thaw(visit_info *info) {
IMAGE_IO * const io = info->image_io;
/* 1. thaw task id */
const INTVAL id = VTABLE_shift_integer(INTERP, io);
/* 2. thaw task birthtime */
const FLOATVAL birthtime = VTABLE_shift_float(INTERP, io);
/* 3. thaw task priority */
const INTVAL priority = VTABLE_shift_integer(INTERP, io);
/* 4. thaw task type */
STRING * const type = VTABLE_shift_string(INTERP, io);
/* 5. thaw task subtype */
STRING * const subtype = VTABLE_shift_string(INTERP, io);
/* 6. thaw task status */
STRING * const 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 subtype to the frozen subtype */
PARROT_TASK(SELF)->subtype = subtype;
/* 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
*/
VTABLE void thawfinish(visit_info *info) {
Parrot_Task_attributes * core_struct = PARROT_TASK(SELF);
UNUSED(core_struct); /* 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:
*/