mirror of
https://github.com/systemd/systemd-stable.git
synced 2024-12-22 13:33:56 +03:00
bus: introduce concept of "const" properties
This way we have four kinds of properties: a) those which are constant as long as an object exists b) those which can change and PropertiesChange messages with contents are generated c) those which can change and where the PropertesChange merely includes invalidation d) those which can change but for which no events are generated Clients (through code generators run on the introspection XML) can thus aggressively cache a, b, c, with only d excluded.
This commit is contained in:
parent
69d918b092
commit
df98a87ba3
7
TODO
7
TODO
@ -118,11 +118,18 @@ Features:
|
||||
- support "const" properties as flag
|
||||
- add API to clone sd_bus_message objects
|
||||
- SD_BUS_COMMENT() macro for inclusion in vtables, syntax inspired by gdbus
|
||||
- systemd-bus-proxyd needs to synthesize NameLost/NameAcquired
|
||||
- kdbus: matches against source or destination pids for an "strace -p"-like feel. Problem: The PID info needs to be available in userspace too...
|
||||
- kdbus: we need a way to figure out whether there's currently an activator for a name that is already activated
|
||||
- longer term:
|
||||
* priority queues
|
||||
* priority inheritance
|
||||
- move to siphash for bloom filter
|
||||
- dbus spec updates:
|
||||
- kdbus mapping
|
||||
- NameLost/NameAcquired obsolete
|
||||
- GVariant
|
||||
- "const" properties
|
||||
|
||||
* sd-event
|
||||
- allow multiple signal handlers per signal?
|
||||
|
@ -82,10 +82,12 @@ static void introspect_write_flags(struct introspect *i, int type, int flags) {
|
||||
fputs(" <annotation name=\"org.freedesktop.DBus.Method.NoReply\" value=\"true\"/>\n", i->f);
|
||||
|
||||
if (type == _SD_BUS_VTABLE_PROPERTY || type == _SD_BUS_VTABLE_WRITABLE_PROPERTY) {
|
||||
if (!(flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE))
|
||||
fputs(" <annotation name=\"org.freedesktop.DBus.Property.EmitsChangedSignal\" value=\"false\"/>\n", i->f);
|
||||
else if (flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY)
|
||||
if (flags & SD_BUS_VTABLE_PROPERTY_CONST)
|
||||
fputs(" <annotation name=\"org.freedesktop.DBus.Property.EmitsChangedSignal\" value=\"const\"/>\n", i->f);
|
||||
else if (flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)
|
||||
fputs(" <annotation name=\"org.freedesktop.DBus.Property.EmitsChangedSignal\" value=\"invalidates\"/>\n", i->f);
|
||||
else if (!(flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE))
|
||||
fputs(" <annotation name=\"org.freedesktop.DBus.Property.EmitsChangedSignal\" value=\"false\"/>\n", i->f);
|
||||
}
|
||||
|
||||
if (!i->trusted &&
|
||||
|
@ -1680,7 +1680,7 @@ static int add_object_vtable_internal(
|
||||
!signature_is_valid(strempty(v->x.method.signature), false) ||
|
||||
!signature_is_valid(strempty(v->x.method.result), false) ||
|
||||
!(v->x.method.handler || (isempty(v->x.method.signature) && isempty(v->x.method.result))) ||
|
||||
v->flags & (SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY)) {
|
||||
v->flags & (SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) {
|
||||
r = -EINVAL;
|
||||
goto fail;
|
||||
}
|
||||
@ -1722,13 +1722,12 @@ static int add_object_vtable_internal(
|
||||
!signature_is_single(v->x.property.signature, false) ||
|
||||
!(v->x.property.get || bus_type_is_basic(v->x.property.signature[0]) || streq(v->x.property.signature, "as")) ||
|
||||
v->flags & SD_BUS_VTABLE_METHOD_NO_REPLY ||
|
||||
(v->flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY && !(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE)) ||
|
||||
(!!(v->flags & SD_BUS_VTABLE_PROPERTY_CONST) + !!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE) + !!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) > 1 ||
|
||||
(v->flags & SD_BUS_VTABLE_UNPRIVILEGED && v->type == _SD_BUS_VTABLE_PROPERTY)) {
|
||||
r = -EINVAL;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
|
||||
m = new0(struct vtable_member, 1);
|
||||
if (!m) {
|
||||
r = -ENOMEM;
|
||||
@ -2013,9 +2012,10 @@ static int emit_properties_changed_on_interface(
|
||||
if (c != v->parent)
|
||||
continue;
|
||||
|
||||
assert_return(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE, -EDOM);
|
||||
assert_return(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE ||
|
||||
v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION, -EDOM);
|
||||
|
||||
if (v->vtable->flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY) {
|
||||
if (v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) {
|
||||
has_invalidating = true;
|
||||
continue;
|
||||
}
|
||||
@ -2084,7 +2084,7 @@ static int emit_properties_changed_on_interface(
|
||||
assert_se(v = hashmap_get(bus->vtable_properties, &key));
|
||||
assert(c == v->parent);
|
||||
|
||||
if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY))
|
||||
if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION))
|
||||
continue;
|
||||
|
||||
r = sd_bus_message_append(m, "s", *property);
|
||||
|
@ -41,7 +41,8 @@ static const sd_bus_vtable vtable[] = {
|
||||
SD_BUS_WRITABLE_PROPERTY("AProperty", "s", prop_get, prop_set, 0, 0),
|
||||
SD_BUS_PROPERTY("AReadOnlyDeprecatedProperty", "(ut)", prop_get, 0, SD_BUS_VTABLE_DEPRECATED),
|
||||
SD_BUS_PROPERTY("ChangingProperty", "t", prop_get, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
|
||||
SD_BUS_PROPERTY("Invalidating", "t", prop_get, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY),
|
||||
SD_BUS_PROPERTY("Invalidating", "t", prop_get, 0, SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
|
||||
SD_BUS_PROPERTY("Constant", "t", prop_get, 0, SD_BUS_VTABLE_PROPERTY_CONST),
|
||||
SD_BUS_VTABLE_END
|
||||
};
|
||||
|
||||
|
@ -40,13 +40,14 @@ enum {
|
||||
};
|
||||
|
||||
enum {
|
||||
SD_BUS_VTABLE_DEPRECATED = 1ULL << 0,
|
||||
SD_BUS_VTABLE_METHOD_NO_REPLY = 1ULL << 1,
|
||||
SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE = 1ULL << 2,
|
||||
SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY = 1ULL << 3,
|
||||
SD_BUS_VTABLE_UNPRIVILEGED = 1ULL << 4,
|
||||
SD_BUS_VTABLE_HIDDEN = 1ULL << 5,
|
||||
_SD_BUS_VTABLE_CAPABILITY_MASK = 0xFFFFULL << 40
|
||||
SD_BUS_VTABLE_DEPRECATED = 1ULL << 0,
|
||||
SD_BUS_VTABLE_HIDDEN = 1ULL << 1,
|
||||
SD_BUS_VTABLE_UNPRIVILEGED = 1ULL << 2,
|
||||
SD_BUS_VTABLE_METHOD_NO_REPLY = 1ULL << 3,
|
||||
SD_BUS_VTABLE_PROPERTY_CONST = 1ULL << 4,
|
||||
SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE = 1ULL << 5,
|
||||
SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION = 1ULL << 6,
|
||||
_SD_BUS_VTABLE_CAPABILITY_MASK = 0xFFFFULL << 40
|
||||
};
|
||||
|
||||
#define SD_BUS_VTABLE_CAPABILITY(x) ((uint64_t) (((x)+1) & 0xFFFF) << 40)
|
||||
|
Loading…
Reference in New Issue
Block a user