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core: add NMDhcpLease typedef and simple accessor functions

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Thomas Haller 2020-09-10 13:58:43 +02:00
parent 348ab39f6d
commit 2fd53eb509
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1 changed files with 61 additions and 0 deletions
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61
src/NetworkManagerUtils.h
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@ -159,4 +159,65 @@ void nm_utils_ip_routes_to_dbus (int addr_family,
GVariant **out_route_data, GVariant **out_route_data,
GVariant **out_routes); GVariant **out_routes);
/*****************************************************************************/
/* For now, all we track about a DHCP lease is the GHashTable with
* the options.
*
* We don't add a separate type for that, but we also don't want to use
* GHashTable directly (because most importantly leases should be immutable
* and passing a GHashTable pointer around neither makes it clear that
* this is a lease nor that it's immutable.
*
* Instead, add a simple opaque pointer and accessors that cast to a GHashTable.
*
* It has no overhead at run time, but gives some rudimentary type safety. */
typedef struct _NMDhcpLease NMDhcpLease;
static inline NMDhcpLease *
nm_dhcp_lease_new_from_options (GHashTable *options_take)
{
/* a NMDhcpLease is really just a GHashTable. But it's also supposed to be *immutable*.
*
* Hence, the API here takes over ownership of the reference to @options_take, that
* is to emphasize that we acquire ownership of the hash, and it should not be modified
* anymore. */
return (NMDhcpLease *) options_take;
}
static inline GHashTable *
nm_dhcp_lease_get_options (NMDhcpLease *lease)
{
return (GHashTable *) lease;
}
static inline void
nm_dhcp_lease_ref (NMDhcpLease *lease)
{
if (lease)
g_hash_table_ref ((GHashTable *) lease);
}
static inline void
nm_dhcp_lease_unref (NMDhcpLease *lease)
{
if (lease)
g_hash_table_unref ((GHashTable *) lease);
}
static inline const char *
nm_dhcp_lease_lookup_option (NMDhcpLease *lease,
const char *option)
{
nm_assert (option);
return nm_g_hash_table_lookup ((GHashTable *) lease, option);
}
NM_AUTO_DEFINE_FCN (NMDhcpLease *, _nm_auto_unref_dhcplease, nm_dhcp_lease_unref);
#define nm_auto_unref_dhcplease nm_auto (_nm_auto_unref_dhcplease)
/*****************************************************************************/
#endif /* __NETWORKMANAGER_UTILS_H__ */ #endif /* __NETWORKMANAGER_UTILS_H__ */