libsystemd-bus: add lightweight object vtable implementation for exposing objects...

[elogind.git] / src / systemd / sd-bus-vtable.h

diff --git a/src/systemd/sd-bus-vtable.h b/src/systemd/sd-bus-vtable.h
new file mode 100644 (file)
index 0000000..a1f078e
--- /dev/null
+++ b/src/systemd/sd-bus-vtable.h
@@ -0,0 +1,127 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#ifndef foosdbusvtablehfoo
+#define foosdbusvtablehfoo
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+typedef struct sd_bus_vtable sd_bus_vtable;
+
+#include "sd-bus.h"
+
+enum {
+        _SD_BUS_VTABLE_START = '<',
+        _SD_BUS_VTABLE_END = '>',
+        _SD_BUS_VTABLE_METHOD = 'M',
+        _SD_BUS_VTABLE_SIGNAL = 'S',
+        _SD_BUS_VTABLE_PROPERTY = 'P',
+        _SD_BUS_VTABLE_WRITABLE_PROPERTY = 'W',
+        _SD_BUS_VTABLE_CHILDREN = 'C'
+};
+
+enum {
+        SD_BUS_VTABLE_DEPRECATED = 1,
+        SD_BUS_VTABLE_METHOD_NO_REPLY = 2,
+        SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE = 4,
+        SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY = 8,
+};
+
+struct sd_bus_vtable {
+        /* Please do not initialize this structure directly, use the
+         * macros below instead */
+
+        int type;
+        int flags;
+        union {
+                struct {
+                        size_t element_size;
+                } start;
+                struct {
+                        const char *member;
+                        const char *signature;
+                        const char *result;
+                        sd_bus_message_handler_t handler;
+                } method;
+                struct {
+                        const char *member;
+                        const char *signature;
+                } signal;
+                struct {
+                        const char *member;
+                        const char *signature;
+                        sd_bus_property_get_t get;
+                        sd_bus_property_set_t set;
+                        size_t offset;
+                } property;
+        };
+};
+
+#define SD_BUS_VTABLE_START(_flags)                                     \
+        {                                                               \
+                .type = _SD_BUS_VTABLE_START,                           \
+                .flags = _flags,                                        \
+                .start.element_size = sizeof(sd_bus_vtable),            \
+        }
+
+#define SD_BUS_METHOD(_member, _signature, _result, _flags, _handler)   \
+        {                                                               \
+                .type = _SD_BUS_VTABLE_METHOD,                          \
+                .flags = _flags,                                        \
+                .method.member = _member,                               \
+                .method.signature = _signature,                         \
+                .method.result = _result,                               \
+                .method.handler = _handler,                             \
+        }
+
+#define SD_BUS_SIGNAL(_member, _signature, _flags)                      \
+        {                                                               \
+                .type = _SD_BUS_VTABLE_SIGNAL,                          \
+                .flags = _flags,                                        \
+                .signal.member = _member,                               \
+                .signal.signature = _signature,                         \
+        }
+
+#define SD_BUS_PROPERTY(_member, _signature, _get, _offset, _flags) \
+        {                                                               \
+                .type = _SD_BUS_VTABLE_PROPERTY,                        \
+                .flags = _flags,                                        \
+                .property.member = _member,                             \
+                .property.signature = _signature,                       \
+                .property.get = _get,                                   \
+                .property.offset = _offset,                             \
+        }
+
+#define SD_BUS_WRITABLE_PROPERTY(_member, _signature, _get, _set, _offset, _flags) \
+        {                                                               \
+                .type = _SD_BUS_VTABLE_WRITABLE_PROPERTY,               \
+                .flags = _flags,                                        \
+                .property.member = _member,                             \
+                .property.signature = _signature,                       \
+                .property.get = _get,                                   \
+                .property.set = _set,                                   \
+                .property.offset = _offset,                             \
+        }
+
+#define SD_BUS_VTABLE_END                                               \
+        {                                                               \
+                .type = _SD_BUS_VTABLE_END,                             \
+        }
+
+#endif