diff options
Diffstat (limited to 'event-loop-base.c')
-rw-r--r-- | event-loop-base.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/event-loop-base.c b/event-loop-base.c new file mode 100644 index 0000000..a924c73 --- /dev/null +++ b/event-loop-base.c @@ -0,0 +1,104 @@ +/* + * 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 "sysemu/event-loop-base.h" + +typedef struct { + const char *name; + ptrdiff_t offset; /* field's byte offset in EventLoopBase struct */ +} EventLoopBaseParamInfo; + +static EventLoopBaseParamInfo aio_max_batch_info = { + "aio-max-batch", offsetof(EventLoopBase, aio_max_batch), +}; + +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 void event_loop_base_class_init(ObjectClass *klass, void *class_data) +{ + UserCreatableClass *ucc = USER_CREATABLE_CLASS(klass); + ucc->complete = event_loop_base_complete; + + object_class_property_add(klass, "aio-max-batch", "int", + event_loop_base_get_param, + event_loop_base_set_param, + NULL, &aio_max_batch_info); +} + +static const TypeInfo event_loop_base_info = { + .name = TYPE_EVENT_LOOP_BASE, + .parent = TYPE_OBJECT, + .instance_size = sizeof(EventLoopBase), + .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); |