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| author | Lennart Poettering <lennart@poettering.net> | 2016-08-15 18:12:01 +0200 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2016-08-22 16:14:21 +0200 |
| commit | 05a98afd3e0513de50c5949b7fa50ff0989d68bc (patch) | |
| tree | 74ef3320a2f75dac4285843098b2b33e5e0c817c /src/libsystemd/sd-bus | |
| parent | ecddb2b586d1b69e5538fb85262d2b9e6d253ac0 (diff) | |
core: add Ref()/Unref() bus calls for units
This adds two (privileged) bus calls Ref() and Unref() to the Unit interface.
The two calls may be used by clients to pin a unit into memory, so that various
runtime properties aren't flushed out by the automatic GC. This is necessary
to permit clients to race-freely acquire runtime results (such as process exit
status/code or accumulated CPU time) on successful service termination.
Ref() and Unref() are fully recursive, hence act like the usual reference
counting concept in C. Taking a reference is a privileged operation, as this
allows pinning units into memory which consumes resources.
Transient units may also gain a reference at the time of creation, via the new
AddRef property (that is only defined for transient units at the time of
creation).
Diffstat (limited to 'src/libsystemd/sd-bus')
| -rw-r--r-- | src/libsystemd/sd-bus/bus-common-errors.c | 1 | ||||
| -rw-r--r-- | src/libsystemd/sd-bus/bus-common-errors.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/src/libsystemd/sd-bus/bus-common-errors.c b/src/libsystemd/sd-bus/bus-common-errors.c index 32be3cdc38..a69193aa32 100644 --- a/src/libsystemd/sd-bus/bus-common-errors.c +++ b/src/libsystemd/sd-bus/bus-common-errors.c @@ -45,6 +45,7 @@ BUS_ERROR_MAP_ELF_REGISTER const sd_bus_error_map bus_common_errors[] = { SD_BUS_ERROR_MAP(BUS_ERROR_SHUTTING_DOWN, ECANCELED), SD_BUS_ERROR_MAP(BUS_ERROR_SCOPE_NOT_RUNNING, EHOSTDOWN), SD_BUS_ERROR_MAP(BUS_ERROR_NO_SUCH_DYNAMIC_USER, ESRCH), + SD_BUS_ERROR_MAP(BUS_ERROR_NOT_REFERENCED, EUNATCH), SD_BUS_ERROR_MAP(BUS_ERROR_NO_SUCH_MACHINE, ENXIO), SD_BUS_ERROR_MAP(BUS_ERROR_NO_SUCH_IMAGE, ENOENT), diff --git a/src/libsystemd/sd-bus/bus-common-errors.h b/src/libsystemd/sd-bus/bus-common-errors.h index befb6fbfe0..5df21c8926 100644 --- a/src/libsystemd/sd-bus/bus-common-errors.h +++ b/src/libsystemd/sd-bus/bus-common-errors.h @@ -41,6 +41,7 @@ #define BUS_ERROR_SHUTTING_DOWN "org.freedesktop.systemd1.ShuttingDown" #define BUS_ERROR_SCOPE_NOT_RUNNING "org.freedesktop.systemd1.ScopeNotRunning" #define BUS_ERROR_NO_SUCH_DYNAMIC_USER "org.freedesktop.systemd1.NoSuchDynamicUser" +#define BUS_ERROR_NOT_REFERENCED "org.freedesktop.systemd1.NotReferenced" #define BUS_ERROR_NO_SUCH_MACHINE "org.freedesktop.machine1.NoSuchMachine" #define BUS_ERROR_NO_SUCH_IMAGE "org.freedesktop.machine1.NoSuchImage" |