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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:25:50 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:25:50 +0000 |
commit | 19f4f86bfed21c5326ed2acebe1163f3a83e832b (patch) | |
tree | d59b9989ce55ed23693e80974d94c856f1c2c8b1 /src/libsystemd/sd-bus/bus-slot.c | |
parent | Initial commit. (diff) | |
download | systemd-upstream.tar.xz systemd-upstream.zip |
Adding upstream version 241.upstream/241upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/libsystemd/sd-bus/bus-slot.c | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/src/libsystemd/sd-bus/bus-slot.c b/src/libsystemd/sd-bus/bus-slot.c new file mode 100644 index 0000000..c9aca07 --- /dev/null +++ b/src/libsystemd/sd-bus/bus-slot.c @@ -0,0 +1,311 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ + +#include "sd-bus.h" + +#include "alloc-util.h" +#include "bus-control.h" +#include "bus-objects.h" +#include "bus-slot.h" +#include "string-util.h" + +sd_bus_slot *bus_slot_allocate( + sd_bus *bus, + bool floating, + BusSlotType type, + size_t extra, + void *userdata) { + + sd_bus_slot *slot; + + assert(bus); + + slot = malloc0(offsetof(sd_bus_slot, reply_callback) + extra); + if (!slot) + return NULL; + + slot->n_ref = 1; + slot->type = type; + slot->bus = bus; + slot->floating = floating; + slot->userdata = userdata; + + if (!floating) + sd_bus_ref(bus); + + LIST_PREPEND(slots, bus->slots, slot); + + return slot; +} + +void bus_slot_disconnect(sd_bus_slot *slot, bool unref) { + sd_bus *bus; + + assert(slot); + + if (!slot->bus) + return; + + switch (slot->type) { + + case BUS_REPLY_CALLBACK: + + if (slot->reply_callback.cookie != 0) + ordered_hashmap_remove(slot->bus->reply_callbacks, &slot->reply_callback.cookie); + + if (slot->reply_callback.timeout_usec != 0) + prioq_remove(slot->bus->reply_callbacks_prioq, &slot->reply_callback, &slot->reply_callback.prioq_idx); + + break; + + case BUS_FILTER_CALLBACK: + slot->bus->filter_callbacks_modified = true; + LIST_REMOVE(callbacks, slot->bus->filter_callbacks, &slot->filter_callback); + break; + + case BUS_MATCH_CALLBACK: + + if (slot->match_added) + (void) bus_remove_match_internal(slot->bus, slot->match_callback.match_string); + + if (slot->match_callback.install_slot) { + bus_slot_disconnect(slot->match_callback.install_slot, true); + slot->match_callback.install_slot = sd_bus_slot_unref(slot->match_callback.install_slot); + } + + slot->bus->match_callbacks_modified = true; + bus_match_remove(&slot->bus->match_callbacks, &slot->match_callback); + + slot->match_callback.match_string = mfree(slot->match_callback.match_string); + + break; + + case BUS_NODE_CALLBACK: + + if (slot->node_callback.node) { + LIST_REMOVE(callbacks, slot->node_callback.node->callbacks, &slot->node_callback); + slot->bus->nodes_modified = true; + + bus_node_gc(slot->bus, slot->node_callback.node); + } + + break; + + case BUS_NODE_ENUMERATOR: + + if (slot->node_enumerator.node) { + LIST_REMOVE(enumerators, slot->node_enumerator.node->enumerators, &slot->node_enumerator); + slot->bus->nodes_modified = true; + + bus_node_gc(slot->bus, slot->node_enumerator.node); + } + + break; + + case BUS_NODE_OBJECT_MANAGER: + + if (slot->node_object_manager.node) { + LIST_REMOVE(object_managers, slot->node_object_manager.node->object_managers, &slot->node_object_manager); + slot->bus->nodes_modified = true; + + bus_node_gc(slot->bus, slot->node_object_manager.node); + } + + break; + + case BUS_NODE_VTABLE: + + if (slot->node_vtable.node && slot->node_vtable.interface && slot->node_vtable.vtable) { + const sd_bus_vtable *v; + + for (v = slot->node_vtable.vtable; v->type != _SD_BUS_VTABLE_END; v++) { + struct vtable_member *x = NULL; + + switch (v->type) { + + case _SD_BUS_VTABLE_METHOD: { + struct vtable_member key; + + key.path = slot->node_vtable.node->path; + key.interface = slot->node_vtable.interface; + key.member = v->x.method.member; + + x = hashmap_remove(slot->bus->vtable_methods, &key); + break; + } + + case _SD_BUS_VTABLE_PROPERTY: + case _SD_BUS_VTABLE_WRITABLE_PROPERTY: { + struct vtable_member key; + + key.path = slot->node_vtable.node->path; + key.interface = slot->node_vtable.interface; + key.member = v->x.method.member; + + x = hashmap_remove(slot->bus->vtable_properties, &key); + break; + }} + + free(x); + } + } + + slot->node_vtable.interface = mfree(slot->node_vtable.interface); + + if (slot->node_vtable.node) { + LIST_REMOVE(vtables, slot->node_vtable.node->vtables, &slot->node_vtable); + slot->bus->nodes_modified = true; + + bus_node_gc(slot->bus, slot->node_vtable.node); + } + + break; + + default: + assert_not_reached("Wut? Unknown slot type?"); + } + + bus = slot->bus; + + slot->type = _BUS_SLOT_INVALID; + slot->bus = NULL; + LIST_REMOVE(slots, bus->slots, slot); + + if (!slot->floating) + sd_bus_unref(bus); + else if (unref) + sd_bus_slot_unref(slot); +} + +static sd_bus_slot* bus_slot_free(sd_bus_slot *slot) { + assert(slot); + + bus_slot_disconnect(slot, false); + + if (slot->destroy_callback) + slot->destroy_callback(slot->userdata); + + free(slot->description); + return mfree(slot); +} + +DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_bus_slot, sd_bus_slot, bus_slot_free); + +_public_ sd_bus* sd_bus_slot_get_bus(sd_bus_slot *slot) { + assert_return(slot, NULL); + + return slot->bus; +} + +_public_ void *sd_bus_slot_get_userdata(sd_bus_slot *slot) { + assert_return(slot, NULL); + + return slot->userdata; +} + +_public_ void *sd_bus_slot_set_userdata(sd_bus_slot *slot, void *userdata) { + void *ret; + + assert_return(slot, NULL); + + ret = slot->userdata; + slot->userdata = userdata; + + return ret; +} + +_public_ int sd_bus_slot_set_destroy_callback(sd_bus_slot *slot, sd_bus_destroy_t callback) { + assert_return(slot, -EINVAL); + + slot->destroy_callback = callback; + return 0; +} + +_public_ int sd_bus_slot_get_destroy_callback(sd_bus_slot *slot, sd_bus_destroy_t *callback) { + assert_return(slot, -EINVAL); + + if (callback) + *callback = slot->destroy_callback; + + return !!slot->destroy_callback; +} + +_public_ sd_bus_message *sd_bus_slot_get_current_message(sd_bus_slot *slot) { + assert_return(slot, NULL); + assert_return(slot->type >= 0, NULL); + + if (slot->bus->current_slot != slot) + return NULL; + + return slot->bus->current_message; +} + +_public_ sd_bus_message_handler_t sd_bus_slot_get_current_handler(sd_bus_slot *slot) { + assert_return(slot, NULL); + assert_return(slot->type >= 0, NULL); + + if (slot->bus->current_slot != slot) + return NULL; + + return slot->bus->current_handler; +} + +_public_ void* sd_bus_slot_get_current_userdata(sd_bus_slot *slot) { + assert_return(slot, NULL); + assert_return(slot->type >= 0, NULL); + + if (slot->bus->current_slot != slot) + return NULL; + + return slot->bus->current_userdata; +} + +_public_ int sd_bus_slot_get_floating(sd_bus_slot *slot) { + assert_return(slot, -EINVAL); + + return slot->floating; +} + +_public_ int sd_bus_slot_set_floating(sd_bus_slot *slot, int b) { + assert_return(slot, -EINVAL); + + if (slot->floating == !!b) + return 0; + + if (!slot->bus) /* already disconnected slots can't be reconnected */ + return -ESTALE; + + slot->floating = b; + + /* When a slot is "floating" then the bus references the slot. Otherwise the slot references the bus. Hence, + * when we move from one to the other, let's increase one reference and decrease the other. */ + + if (b) { + sd_bus_slot_ref(slot); + sd_bus_unref(slot->bus); + } else { + sd_bus_ref(slot->bus); + sd_bus_slot_unref(slot); + } + + return 1; +} + +_public_ int sd_bus_slot_set_description(sd_bus_slot *slot, const char *description) { + assert_return(slot, -EINVAL); + + return free_and_strdup(&slot->description, description); +} + +_public_ int sd_bus_slot_get_description(sd_bus_slot *slot, const char **description) { + assert_return(slot, -EINVAL); + assert_return(description, -EINVAL); + + if (slot->description) + *description = slot->description; + else if (slot->type == BUS_MATCH_CALLBACK) + *description = slot->match_callback.match_string; + else + return -ENXIO; + + return 0; +} |