src/shared/bus-get-properties.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #pragma once
   3
   4 #include "sd-bus.h"
   5
   6 #include "macro.h"
   7
   8 int bus_property_get_bool(sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error);
   9 int bus_property_set_bool(sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *value, void *userdata, sd_bus_error *error);
  10 int bus_property_get_tristate(sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error);
  11 int bus_property_get_id128(sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error);
  12
  13 #define bus_property_get_usec ((sd_bus_property_get_t) NULL)
  14 #define bus_property_set_usec ((sd_bus_property_set_t) NULL)
  15
  16 assert_cc(sizeof(int) == sizeof(int32_t));
  17 #define bus_property_get_int ((sd_bus_property_get_t) NULL)
  18
  19 assert_cc(sizeof(unsigned) == sizeof(uint32_t));
  20 #define bus_property_get_unsigned ((sd_bus_property_get_t) NULL)
  21
  22 /* On 64-bit machines we can use the default serializer for size_t and
  23  * friends, otherwise we need to cast this manually */
  24 #if __SIZEOF_SIZE_T__ == 8
  25 #define bus_property_get_size ((sd_bus_property_get_t) NULL)
  26 #else
  27 int bus_property_get_size(sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error);
  28 #endif
  29
  30 #if __SIZEOF_LONG__ == 8
  31 #define bus_property_get_long ((sd_bus_property_get_t) NULL)
  32 #define bus_property_get_ulong ((sd_bus_property_get_t) NULL)
  33 #else
  34 int bus_property_get_long(sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error);
  35 int bus_property_get_ulong(sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error);
  36 #endif
  37
  38 /* uid_t and friends on Linux 32 bit. This means we can just use the
  39  * default serializer for 32-bit unsigned, for serializing it, and map
  40  * it to NULL here */
  41 assert_cc(sizeof(uid_t) == sizeof(uint32_t));
  42 #define bus_property_get_uid ((sd_bus_property_get_t) NULL)
  43
  44 assert_cc(sizeof(gid_t) == sizeof(uint32_t));
  45 #define bus_property_get_gid ((sd_bus_property_get_t) NULL)
  46
  47 assert_cc(sizeof(pid_t) == sizeof(uint32_t));
  48 #define bus_property_get_pid ((sd_bus_property_get_t) NULL)
  49
  50 assert_cc(sizeof(mode_t) == sizeof(uint32_t));
  51 #define bus_property_get_mode ((sd_bus_property_get_t) NULL)
  52
  53 int bus_property_get_rlimit(sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error);
  54
  55 #define BUS_DEFINE_PROPERTY_GET_GLOBAL(function, bus_type, val)         \
  56         int function(sd_bus *bus,                                       \
  57                      const char *path,                                  \
  58                      const char *interface,                             \
  59                      const char *property,                              \
  60                      sd_bus_message *reply,                             \
  61                      void *userdata,                                    \
  62                      sd_bus_error *error) {                             \
  63                                                                         \
  64                 assert(bus);                                            \
  65                 assert(reply);                                          \
  66                                                                         \
  67                 return sd_bus_message_append(reply, bus_type, val);     \
  68         }
  69
  70 #define BUS_DEFINE_PROPERTY_GET2(function, bus_type, data_type, get1, get2) \
  71         int function(sd_bus *bus,                                       \
  72                      const char *path,                                  \
  73                      const char *interface,                             \
  74                      const char *property,                              \
  75                      sd_bus_message *reply,                             \
  76                      void *userdata,                                    \
  77                      sd_bus_error *error) {                             \
  78                                                                         \
  79                 data_type *data = ASSERT_PTR(userdata);                 \
  80                                                                         \
  81                 assert(bus);                                            \
  82                 assert(reply);                                          \
  83                                                                         \
  84                 return sd_bus_message_append(reply, bus_type,           \
  85                                              get2(get1(data)));         \
  86         }
  87
  88 #define ident(x) (x)
  89 #define BUS_DEFINE_PROPERTY_GET(function, bus_type, data_type, get1) \
  90         BUS_DEFINE_PROPERTY_GET2(function, bus_type, data_type, get1, ident)
  91
  92 #define ref(x) (*(x))
  93 #define BUS_DEFINE_PROPERTY_GET_REF(function, bus_type, data_type, get) \
  94         BUS_DEFINE_PROPERTY_GET2(function, bus_type, data_type, ref, get)
  95
  96 #define BUS_DEFINE_PROPERTY_GET_ENUM(function, name, type)              \
  97         BUS_DEFINE_PROPERTY_GET_REF(function, "s", type, name##_to_string)
  98
  99 #define BUS_PROPERTY_DUAL_TIMESTAMP(name, offset, flags) \
 100         SD_BUS_PROPERTY(name, "t", bus_property_get_usec, (offset) + offsetof(struct dual_timestamp, realtime), (flags)), \
 101         SD_BUS_PROPERTY(name "Monotonic", "t", bus_property_get_usec, (offset) + offsetof(struct dual_timestamp, monotonic), (flags))