Commit graph

8 commits

Author SHA1 Message Date
Thomas Haller
a4f735029a shared/glib: reimplement g_atomic_pointer_compare_and_exchange() macro
With glib 2.63.2 and clang 9.0.0 (Fedora 32) we get compile errors:

  ../clients/cloud-setup/nmcs-provider-ec2.c:51:8: error: incompatible pointer types passing 'typeof ((((void *)0))) *' (aka 'void **') to parameter of type 'const char **' [-Werror,-Wincompatible-pointer-types]
                  if (!g_atomic_pointer_compare_and_exchange (&base_cached, NULL, base))
                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  /usr/include/glib-2.0/glib/gatomic.h:192:44: note: expanded from macro 'g_atomic_pointer_compare_and_exchange'
      __atomic_compare_exchange_n ((atomic), &gapcae_oldval, (newval), FALSE, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST) ? TRUE : FALSE; \
                                             ^~~~~~~~~~~~~~
  ../src/devices/bluetooth/nm-bluez-manager.c:2836:2: error: incompatible pointer types passing 'typeof ((((void *)0))) *' (aka 'void **') to parameter of type 'const NMBtVTableNetworkServer **' (aka 'const struct _NMBtVTableNetworkServer **') [-Werror,-Wincompatible-pointer-types]
          g_atomic_pointer_compare_and_exchange (&nm_bt_vtable_network_server, NULL, &priv->vtable_network_server);
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  /usr/include/glib-2.0/glib/gatomic.h:192:44: note: expanded from macro 'g_atomic_pointer_compare_and_exchange'
      __atomic_compare_exchange_n ((atomic), &gapcae_oldval, (newval), FALSE, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST) ? TRUE : FALSE; \
                                             ^~~~~~~~~~~~~~
  ../src/devices/bluetooth/nm-bluez-manager.c:2853:2: error: passing 'typeof ((&priv->vtable_network_server)) *' (aka 'struct _NMBtVTableNetworkServer **') to parameter of type 'const NMBtVTableNetworkServer **' (aka 'const struct _NMBtVTableNetworkServer **') discards qualifiers in nested pointer types [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
          g_atomic_pointer_compare_and_exchange (&nm_bt_vtable_network_server, &priv->vtable_network_server, NULL);
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  /usr/include/glib-2.0/glib/gatomic.h:192:44: note: expanded from macro 'g_atomic_pointer_compare_and_exchange'
      __atomic_compare_exchange_n ((atomic), &gapcae_oldval, (newval), FALSE, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST) ? TRUE : FALSE; \
                                             ^~~~~~~~~~~~~~
  ../src/devices/nm-device.c:8857:8: error: incompatible pointer types passing 'typeof ((((void *)0))) *' (aka 'void **') to parameter of type 'GBytes **' (aka 'struct _GBytes **') [-Werror,-Wincompatible-pointer-types]
                  if (!g_atomic_pointer_compare_and_exchange (&global_duid, NULL, p)) {
                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  /usr/include/glib-2.0/glib/gatomic.h:192:44: note: expanded from macro 'g_atomic_pointer_compare_and_exchange'
      __atomic_compare_exchange_n ((atomic), &gapcae_oldval, (newval), FALSE, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST) ? TRUE : FALSE; \
                                             ^~~~~~~~~~~~~~

The issue happens because glib passes the "atomic" argument to

  __atomic_compare_exchange_n ((atomic), &gapcae_oldval, (newval), FALSE, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)

without cast, and clang 9 seems to be picky about const pointers.
Add our own version of the macro that does better casts while also having
better compile time checks for valid arguments.

(cherry picked from commit f5b0713651)
(cherry picked from commit d8cc6af058)
(cherry picked from commit 925a688400)
2020-04-20 11:38:47 +02:00
Thomas Haller
c64217546f shared/glib: unconditionally redefine g_object_ref()/g_object_ref_sink() as typesafe macro
(cherry picked from commit 03b8eb124e)
2020-04-20 11:38:27 +02:00
Thomas Haller
82de6c9180 shared: fix _NM_ENSURE_TYPE_CONST() for const pointers with clang
Clang 3.4.2-9.el7 on CentOS7.6 complains about missing generic type match:

    ../dispatcher/nm-dispatcher.c:243:2: error: controlling expression type 'const Request *const' (aka 'const struct Request *const') not compatible with any generic association type
            _LOG_R_D (request, "start running ordered scripts...");
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Fixes: 17dc6a9da6 ('shared: add _NM_ENSURE_TYPE_CONST()')
(cherry picked from commit 3d42b2f1fa)
2019-10-08 15:26:50 +02:00
Thomas Haller
34bdc6caa1 shared: add _NM_ENSURE_TYPE_CONST()
The sole purpose of this is more type-safe macros.

An alternative solution would be to define a function instead of a
macro. But if the function is unused (currently!) you get a compiler
warning (on some compilers even when marking the function as "static
inline", if it's in the source file). A workaround for that would be
to mark the function as _nm_unused, or to use a macro instead.

_NM_ENSURE_TYPE_CONST() is to aid the macro solution.

(cherry picked from commit 17dc6a9da6)
2019-10-08 15:26:50 +02:00
Beniamino Galvani
bb5038defc ifcfg-rh: preserve existence of wired setting
Currently the plugin doesn't preserve the existence of a wired setting
because the writer saves only variables with non-default values and,
especially, the reader always creates the setting.

Fix this; now the writer writes HWADDR even if empty when the setting
is present; the reader creates the setting when at least one property
is found.

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/merge_requests/166
https://bugzilla.redhat.com/show_bug.cgi?id=1703960
(cherry picked from commit d6a51ced40)
2019-05-28 11:35:03 +02:00
Thomas Haller
84bd35e4fa shared: use nm_str_skip_leading_spaces() in _nm_utils_ascii_str_to_int64()
(cherry picked from commit 9d2623cceb)
2019-05-15 14:07:07 +02:00
Beniamino Galvani
f6b9366eb4 all: fix typos (milli seconds -> milliseconds)
(cherry picked from commit 4735d6764a)
2019-05-08 13:44:22 +02:00
Thomas Haller
d984b2ce4a shared: move most of "shared/nm-utils" to "shared/nm-glib-aux"
From the files under "shared/nm-utils" we build an internal library
that provides glib-based helper utilities.

Move the files of that basic library to a new subdirectory
"shared/nm-glib-aux" and rename the helper library "libnm-core-base.la"
to "libnm-glib-aux.la".

Reasons:

 - the name "utils" is overused in our code-base. Everything's an
   "utils". Give this thing a more distinct name.

 - there were additional files under "shared/nm-utils", which are not
   part of this internal library "libnm-utils-base.la". All the files
   that are part of this library should be together in the same
   directory, but files that are not, should not be there.

 - the new name should better convey what this library is and what is isn't:
   it's a set of utilities and helper functions that extend glib with
   funcitonality that we commonly need.

There are still some files left under "shared/nm-utils". They have less
a unifying propose to be in their own directory, so I leave them there
for now. But at least they are separate from "shared/nm-glib-aux",
which has a very clear purpose.

(cherry picked from commit 80db06f768)
2019-04-18 19:57:27 +02:00