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/*
* QEMU event-loop base
*
* Copyright (C) 2022 Red Hat Inc
*
* Authors:
* Stefan Hajnoczi <stefanha@redhat.com>
* Nicolas Saenz Julienne <nsaenzju@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qom/object_interfaces.h"
#include "qapi/error.h"
#include "block/thread-pool.h"
#include "sysemu/event-loop-base.h"
typedef struct {
const char *name;
ptrdiff_t offset; /* field's byte offset in EventLoopBase struct */
} EventLoopBaseParamInfo;
static void event_loop_base_instance_init(Object *obj)
{
EventLoopBase *base = EVENT_LOOP_BASE(obj);
base->thread_pool_max = THREAD_POOL_MAX_THREADS_DEFAULT;
}
static EventLoopBaseParamInfo aio_max_batch_info = {
"aio-max-batch", offsetof(EventLoopBase, aio_max_batch),
};
static EventLoopBaseParamInfo thread_pool_min_info = {
"thread-pool-min", offsetof(EventLoopBase, thread_pool_min),
};
static EventLoopBaseParamInfo thread_pool_max_info = {
"thread-pool-max", offsetof(EventLoopBase, thread_pool_max),
};
static void event_loop_base_get_param(Object *obj, Visitor *v,
const char *name, void *opaque, Error **errp)
{
EventLoopBase *event_loop_base = EVENT_LOOP_BASE(obj);
EventLoopBaseParamInfo *info = opaque;
int64_t *field = (void *)event_loop_base + info->offset;
visit_type_int64(v, name, field, errp);
}
static void event_loop_base_set_param(Object *obj, Visitor *v,
const char *name, void *opaque, Error **errp)
{
EventLoopBaseClass *bc = EVENT_LOOP_BASE_GET_CLASS(obj);
EventLoopBase *base = EVENT_LOOP_BASE(obj);
EventLoopBaseParamInfo *info = opaque;
int64_t *field = (void *)base + info->offset;
int64_t value;
if (!visit_type_int64(v, name, &value, errp)) {
return;
}
if (value < 0) {
error_setg(errp, "%s value must be in range [0, %" PRId64 "]",
info->name, INT64_MAX);
return;
}
*field = value;
if (bc->update_params) {
bc->update_params(base, errp);
}
return;
}
static void event_loop_base_complete(UserCreatable *uc, Error **errp)
{
EventLoopBaseClass *bc = EVENT_LOOP_BASE_GET_CLASS(uc);
EventLoopBase *base = EVENT_LOOP_BASE(uc);
if (bc->init) {
bc->init(base, errp);
}
}
static bool event_loop_base_can_be_deleted(UserCreatable *uc)
{
EventLoopBaseClass *bc = EVENT_LOOP_BASE_GET_CLASS(uc);
EventLoopBase *backend = EVENT_LOOP_BASE(uc);
if (bc->can_be_deleted) {
return bc->can_be_deleted(backend);
}
return true;
}
static void event_loop_base_class_init(ObjectClass *klass, void *class_data)
{
UserCreatableClass *ucc = USER_CREATABLE_CLASS(klass);
ucc->complete = event_loop_base_complete;
ucc->can_be_deleted = event_loop_base_can_be_deleted;
object_class_property_add(klass, "aio-max-batch", "int",
event_loop_base_get_param,
event_loop_base_set_param,
NULL, &aio_max_batch_info);
object_class_property_add(klass, "thread-pool-min", "int",
event_loop_base_get_param,
event_loop_base_set_param,
NULL, &thread_pool_min_info);
object_class_property_add(klass, "thread-pool-max", "int",
event_loop_base_get_param,
event_loop_base_set_param,
NULL, &thread_pool_max_info);
}
static const TypeInfo event_loop_base_info = {
.name = TYPE_EVENT_LOOP_BASE,
.parent = TYPE_OBJECT,
.instance_size = sizeof(EventLoopBase),
.instance_init = event_loop_base_instance_init,
.class_size = sizeof(EventLoopBaseClass),
.class_init = event_loop_base_class_init,
.abstract = true,
.interfaces = (InterfaceInfo[]) {
{ TYPE_USER_CREATABLE },
{ }
}
};
static void register_types(void)
{
type_register_static(&event_loop_base_info);
}
type_init(register_types);
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