X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Flibsystemd-bus%2Fbus-internal.h;h=b6975c54a2221d439be6d6082f6a44064949fd58;hb=d5a2b9a6f455468a0f29483303657ab4fd7013d8;hp=504dac7f09a6453e783997f2e1229d0a2d0ed84d;hpb=bc7fd8cdbef54ebd3902cdd455ecad3e095f7450;p=elogind.git

diff --git a/src/libsystemd-bus/bus-internal.h b/src/libsystemd-bus/bus-internal.h
index 504dac7f0..b6975c54a 100644
--- a/src/libsystemd-bus/bus-internal.h
+++ b/src/libsystemd-bus/bus-internal.h
@@ -29,6 +29,7 @@
 #include "prioq.h"
 #include "list.h"
 #include "util.h"
+#include "refcnt.h"
 
 #include "sd-bus.h"
 #include "bus-error.h"
@@ -67,9 +68,14 @@ enum bus_state {
         BUS_OPENING,
         BUS_AUTHENTICATING,
         BUS_HELLO,
-        BUS_RUNNING
+        BUS_RUNNING,
+        BUS_CLOSED
 };
 
+static inline bool BUS_IS_OPEN(enum bus_state state) {
+        return state > BUS_UNSET && state < BUS_CLOSED;
+}
+
 enum bus_auth {
         _BUS_AUTH_INVALID,
         BUS_AUTH_EXTERNAL,
@@ -77,7 +83,16 @@ enum bus_auth {
 };
 
 struct sd_bus {
-        unsigned n_ref;
+        /* We use atomic ref counting here since sd_bus_message
+           objects retain references to their originating sd_bus but
+           we want to allow them to be processed in a different
+           thread. We won't provide full thread safety, but only the
+           bare minimum that makes it possible to use sd_bus and
+           sd_bus_message objects independently and on different
+           threads as long as each object is used only once at the
+           same time. */
+        RefCount n_ref;
+
         enum bus_state state;
         int input_fd, output_fd;
         int message_version;
@@ -156,6 +171,8 @@ struct sd_bus {
 
         struct memfd_cache memfd_cache[MEMFD_CACHE_MAX];
         unsigned n_memfd_cache;
+
+        pid_t original_pid;
 };
 
 static inline void bus_unrefp(sd_bus **b) {
@@ -202,3 +219,5 @@ const char *bus_message_type_to_string(uint8_t u);
 int bus_ensure_running(sd_bus *bus);
 int bus_start_running(sd_bus *bus);
 int bus_next_address(sd_bus *bus);
+
+bool bus_pid_changed(sd_bus *bus);