Stanislaw Kardach 1abb185d6c stack: allow lock-free only on relevant architectures
Since commit 7911ba0473e0 ("stack: enable lock-free implementation for
aarch64"), lock-free stack is supported on arm64 but this description was
missing from the doxygen for the flag.

Currently it is impossible to detect programmatically whether lock-free
implementation of rte_stack is supported. One could check whether the
header guard for lock-free stubs is defined (_RTE_STACK_LF_STUBS_H_) but
that's an unstable implementation detail. Because of that currently all
lock-free ring creations silently succeed (as long as the stack header
is 16B long) which later leads to push and pop operations being NOPs.
The observable effect is that stack_lf_autotest fails on platforms not
supporting the lock-free. Instead it should just skip the lock-free test
altogether.

This commit adds a new errno value (ENOTSUP) that may be returned by
rte_stack_create() to indicate that a given combination of flags is not
supported on a current platform.
This is detected by checking a compile-time flag in the include logic in
rte_stack_lf.h which may be used by applications to check the lock-free
support at compile time.

Use the added RTE_STACK_LF_SUPPORTED flag to disable the lock-free stack
tests at the compile time.
Perf test doesn't fail because rte_ring_create() succeeds, however
marking this test as skipped gives a better indication of what actually
was tested.

Fixes: 7911ba0473e0 ("stack: enable lock-free implementation for aarch64")

Signed-off-by: Stanislaw Kardach <kda@semihalf.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
2021-05-03 18:46:15 +02:00
..
2020-10-02 13:51:00 +02:00
2021-04-21 16:29:20 +02:00
2019-02-26 15:29:27 +01:00
2020-10-19 16:08:36 +02:00
2021-04-21 17:08:02 +02:00
2019-02-26 15:29:27 +01:00
2019-02-26 15:29:27 +01:00
2019-02-26 15:29:27 +01:00
2019-12-20 15:05:41 +01:00
2020-10-13 19:26:15 +02:00
2021-03-03 10:05:23 +01:00
2020-10-20 13:17:08 +02:00
2020-02-05 14:37:41 +01:00
2019-02-26 15:29:27 +01:00
2021-04-12 09:21:30 +02:00
2019-07-06 10:32:34 +02:00
2020-10-28 21:23:11 +01:00
2020-03-04 10:11:07 +01:00
2020-10-28 21:23:11 +01:00
2020-10-24 11:11:46 +02:00
2020-04-25 15:15:30 +02:00
2019-10-23 16:57:06 +02:00
2020-10-20 13:17:08 +02:00
2021-03-16 20:15:29 +01:00
2020-07-08 14:41:06 +02:00
2021-04-09 14:01:07 +02:00
2020-02-05 14:37:41 +01:00
2019-02-26 15:29:27 +01:00
2020-02-05 14:37:41 +01:00
2021-01-14 16:41:40 +01:00
2020-04-16 18:16:46 +02:00
2020-02-05 14:37:41 +01:00
2020-04-16 18:30:58 +02:00
2019-04-11 14:27:32 +02:00
2019-10-27 14:40:55 +01:00
2019-02-26 15:29:27 +01:00
2020-10-16 22:26:41 +02:00
2019-02-26 15:29:27 +01:00
2019-02-26 15:29:27 +01:00
2019-11-26 00:12:08 +01:00
2019-11-07 17:46:43 +01:00
2020-11-15 16:45:48 +01:00
2019-02-26 15:29:27 +01:00
2019-02-26 15:29:27 +01:00
2019-02-26 15:29:27 +01:00
2019-02-26 15:29:27 +01:00
2021-04-20 23:13:23 +02:00
2019-02-26 15:29:27 +01:00
2021-04-14 15:14:56 +02:00
2021-04-14 15:14:56 +02:00