[PATCH v2] eal: introduce atomics abstraction

[Ferruh Yigit]

On 2/9/2023 9:04 AM, Bruce Richardson wrote:
> On Wed, Feb 08, 2023 at 01:43:38PM -0800, Tyler Retzlaff wrote:
>> Introduce atomics abstraction that permits optional use of standard C11
>> atomics when meson is provided the new enable_stdatomics=true option.
>>
>> Signed-off-by: Tyler Retzlaff <roretzla at linux.microsoft.com>
>> ---
>>  config/meson.build                     | 11 ++++
>>  lib/eal/arm/include/rte_atomic_32.h    |  6 ++-
>>  lib/eal/arm/include/rte_atomic_64.h    |  6 ++-
>>  lib/eal/include/generic/rte_atomic.h   | 96 +++++++++++++++++++++++++++++++++-
>>  lib/eal/loongarch/include/rte_atomic.h |  6 ++-
>>  lib/eal/ppc/include/rte_atomic.h       |  6 ++-
>>  lib/eal/riscv/include/rte_atomic.h     |  6 ++-
>>  lib/eal/x86/include/rte_atomic.h       |  8 ++-
>>  meson_options.txt                      |  2 +
>>  9 files changed, 139 insertions(+), 8 deletions(-)
>>
>> diff --git a/config/meson.build b/config/meson.build
>> index 26f3168..25dd628 100644
>> --- a/config/meson.build
>> +++ b/config/meson.build
>> @@ -255,6 +255,17 @@ endif
>>  # add -include rte_config to cflags
>>  add_project_arguments('-include', 'rte_config.h', language: 'c')
>>  
>> +stdc_atomics_enabled = get_option('enable_stdatomics')
>> +dpdk_conf.set('RTE_STDC_ATOMICS', stdc_atomics_enabled)
>> +
>> +if stdc_atomics_enabled
>> +if cc.get_id() == 'gcc' or cc.get_id() == 'clang'
>> +    add_project_arguments('-std=gnu11', language: 'c')
> 
> Is there a reason for using gnu11 on gcc and clang, rather than limiting
> ourselves to proper c11 support?
> 

+1 to stick to c11 standard instead of relying compiler extensions