This should help address a recurring problem.
This change makes the OVS header files, when parsed by a C++ compiler,
require C++11 or later.
Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Russell Bryant <russell@ovn.org>
Until now, the BUILD_ASSERT and BUILD_ASSERT_DECL macros have used OVS's
home-grown build assertion strategy. This commit switches them to using
C11 build assertions with compilers that support them. The semantics are
the same, but C11 build assertions yield clearer error messages when they
fail.
This commit also reorders the definitions a bit to make it easier to
follow.
Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Jarno Rajahalme <jarno@ovn.org>
Sometimes code is much simpler if we can statically initialize data
structures. Until now, this has not been possible for cmap-based data
structures, so this commit introduces a CMAP_INITIALIZER macro.
This works by adding a singleton empty cmap_impl that simply forces the
first insertion into any cmap that points to it to allocate a real
cmap_impl. There could be some risk that rogue code modifies the
singleton, so for safety it is also marked 'const' to allow the linker to
put it into a read-only page.
This adds a new OVS_ALIGNED_VAR macro with GCC and MSVC implementations.
The latter is based on Microsoft webpages, so developers who know Windows
might want to scrutinize it.
As examples of the kind of simplification this can make possible, this
commit removes an initialization function from ofproto-dpif-rid.c and a
call to cmap_init() from tnl-neigh-cache.c. An upcoming commit will add
another user.
CC: Jarno Rajahalme <jarno@ovn.org>
CC: Gurucharan Shetty <guru@ovn.org>
Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Ryan Moats <rmoats@us.ibm.com>
Removed redundant #includes and moved some macros to different file
scope
Signed-off-by: Ben Warren <ben@skyportsystems.com>
Acked-by: Ryan Moats <rmoats@us.ibm.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
The following macros are renamed to avoid conflicts with other headers:
* WARN_UNUSED_RESULT to OVS_WARN_UNUSED_RESULT
* PRINTF_FORMAT to OVS_PRINTF_FORMAT
* NO_RETURN to OVS_NO_RETURN
Signed-off-by: Thomas Graf <tgraf@noironetworks.com>
Acked-by: Ben Pfaff <blp@nicira.com>
