Re: [dpdk-dev] [PATCH v5 2/8] eal: add header files to support windows

[Thomas Monjalon <thomas@monjalon.net>]

28/03/2019 00:10, Anand Rawat:
> On 3/27/2019 3:29 PM, Thomas Monjalon wrote:
> > 27/03/2019 22:23, Ranjit Menon:
> > > On 3/26/2019 3:20 AM, Jerin Jacob Kollanukkaran wrote:
> > >> On Mon, 2019-03-25 at 23:02 -0700, Anand Rawat wrote:
> > >>> Added header files to support windows on x86 platforms.
> > >>> Updated rte_common.h to include rte_windows.h for windows
> > >>> build. Updated lib/meson.build to create shared libraries
> > >>> on windows. Added def file to list the exports for the
> > >>> eal library.
> > >>>
> > >>> Signed-off-by: Anand Rawat <anand.rawat@intel.com>
> > >>> Signed-off-by: Pallavi Kadam <pallavi.kadam@intel.com>
> > >>> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> > >>> Reviewed-by: Jeff Shaw <jeffrey.b.shaw@intel.com>
> > >>> Reviewed-by: Ranjit Menon <ranjit.menon@intel.com>
> > >>> ---
> > >>>    lib/librte_eal/common/include/rte_common.h    |  7 ++++-
> > >>>    .../common/include/rte_string_fns.h           |  4 ++-
> > >>>    lib/librte_eal/rte_eal_exports.def            |  9 ++++++
> > >>>    .../windows/eal/include/rte_windows.h         | 30
> > >>> +++++++++++++++++++
> > >>>    lib/librte_eal/windows/eal/meson.build        |  2 ++
> > >>>    lib/meson.build                               | 19 ++++++++++--
> > >>>    6 files changed, 66 insertions(+), 5 deletions(-)
> > >>>    create mode 100644 lib/librte_eal/rte_eal_exports.def
> > >>>    create mode 100644 lib/librte_eal/windows/eal/include/rte_windows.h
> > >>>
> > >>> diff --git a/lib/librte_eal/common/include/rte_common.h
> > >>> b/lib/librte_eal/common/include/rte_common.h
> > >>> index 7178ba1e9..4775c84f5 100644
> > >>> --- a/lib/librte_eal/common/include/rte_common.h
> > >>> +++ b/lib/librte_eal/common/include/rte_common.h
> > >>> @@ -1,5 +1,5 @@
> > >>>    /* SPDX-License-Identifier: BSD-3-Clause
> > >>> - * Copyright(c) 2010-2014 Intel Corporation
> > >>> + * Copyright(c) 2010-2019 Intel Corporation
> > >>>     */
> > >>>
> > >>>    #ifndef _RTE_COMMON_H_
> > >>> @@ -24,6 +24,11 @@ extern "C" {
> > >>>
> > >>>    #include <rte_config.h>
> > >>>
> > >>> +/* windows specific*/
> > >>> +#ifdef RTE_EXEC_ENV_WINDOWS
> > >>> +#include <rte_windows.h>
> > >>> +#endif
> > >>> +
> > >>
> > >> IMO, Updating the rte_common.h for each execution environment is not
> > >> clean and unnecessary #ifdef clutter in the common code.
> > >>
> > >> I think, it can be fixed by adding new os or eal specific header file
> > >> at the following location and simply include it(without any #ifdef)
> > >>
> > >> lib/librte_eal/linux/eal/include/exec-env/rte_eal.h
> > >> lib/librte_eal/freebsd/eal/include/exec-env/rte_eal.h
> > >> lib/librte_eal/windows/eal/include/exec-env/rte_eal.h # the content of
> > >> exiting rte_windows.h goes here.
> > >>
> > >> It can be rte_eal.h or rte_os.h or anything similar.
> > >>
> > >>
> > > This was done based on a suggestion from Thomas:
> > > (http://patches.dpdk.org/patch/50844/)
> > >
> > > But, I agree. Your suggestion would be a good enhancement. There is
> > > already an existing rte_eal.h in common/include, so an rte_os.h or
> > > something similar might make sense.
> >
> > Yes I agree with rte_os.h
> >
> >
> I can include this change in v6. I am looking to add rte_os.h under
> windows/eal/include/exec-env/ and include the header in rte_common.h
> as a separate patch. This change would require new files for linux and freebsd.
> What be should be the content of that?

I think you can add empty files.
Later we may discover some definitions to move from common code to rte_os.h.