From: "Morten Brørup" <mb@smartsharesystems.com>
To: "Tyler Retzlaff" <roretzla@linux.microsoft.com>
Cc: dev@dpdk.org, techboard@dpdk.org,
"Bruce Richardson" <bruce.richardson@intel.com>,
"Honnappa Nagarahalli" <honnappa.nagarahalli@arm.com>,
"Ruifeng Wang" <ruifeng.wang@arm.com>,
"Jerin Jacob" <jerinj@marvell.com>,
"Sunil Kumar Kori" <skori@marvell.com>,
"Mattias Rönnblom" <mattias.ronnblom@ericsson.com>,
"Joyce Kong" <joyce.kong@arm.com>,
"David Christensen" <drc@linux.vnet.ibm.com>,
"Konstantin Ananyev" <konstantin.v.ananyev@yandex.ru>,
"David Hunt" <david.hunt@intel.com>,
"Thomas Monjalon" <thomas@monjalon.net>,
"David Marchand" <david.marchand@redhat.com>
Subject: RE: [PATCH 1/6] eal: provide rte stdatomics optional atomics API
Date: Mon, 14 Aug 2023 11:04:32 +0200 [thread overview]
Message-ID: <98CBD80474FA8B44BF855DF32C47DC35D87AF6@smartserver.smartshare.dk> (raw)
In-Reply-To: <20230811155441.GB20040@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net>
> From: Tyler Retzlaff [mailto:roretzla@linux.microsoft.com]
> Sent: Friday, 11 August 2023 17.55
>
> On Fri, Aug 11, 2023 at 11:42:12AM +0200, Morten Brørup wrote:
> > > From: Tyler Retzlaff [mailto:roretzla@linux.microsoft.com]
> > > Sent: Friday, 11 August 2023 03.32
> > >
> > > Provide API for atomic operations in the rte namespace that may
> > > optionally be configured to use C11 atomics with meson
> > > option enable_stdatomics=true
> > >
> > > Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
> > > ---
[...]
> >
> > Move the (changed) C11 memory order type definition here:
> >
> > /* The memory order is an enumerated type in C11. */
> > #define memory_order rte_memory_order
No objections to your typedef in v2.
[...]
> > > +#ifdef __ATOMIC_SEQ_CST
> > > +_Static_assert(rte_memory_order_seq_cst == __ATOMIC_SEQ_CST,
> > > + "rte_memory_order_seq_cst == __ATOMIC_SEQ_CST");
> > > +#endif
> >
> > Excellent idea adding these _Static_asserts!
> >
> > Have you tested (with the toolchain you are targeting with this
> _Static_assert) that e.g. __ATOMIC_RELAXED is actually #defined, so the
> preprocessor can see it? (I guess that being a built-it, it might not be a
> #define, it might be a magic value known by the compiler only.)
>
> * llvm and gcc both expose it as a built-in #define for test builds i
> have run. worst case the assert is lost if it isn't.
I only wanted to check that we didn't always hit the "worst case" where the static_assert is lost, so thank you for the confirmation regarding GCC/clang.
> * since i have to handle non-{clang,gcc} too i still guard with ifdef
Agree.
> * i do need to switch to using assert.h static_assert macro to
> inter-operate with c++ in v2
OK. I reviewed that in v2 too.
-Morten
next prev parent reply other threads:[~2023-08-14 9:04 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-11 1:31 [PATCH 0/6] RFC optional rte optional stdatomics API Tyler Retzlaff
2023-08-11 1:31 ` [PATCH 1/6] eal: provide rte stdatomics optional atomics API Tyler Retzlaff
2023-08-11 8:56 ` Bruce Richardson
2023-08-11 9:42 ` Morten Brørup
2023-08-11 15:54 ` Tyler Retzlaff
2023-08-14 9:04 ` Morten Brørup [this message]
2023-08-11 1:31 ` [PATCH 2/6] eal: adapt EAL to present rte " Tyler Retzlaff
2023-08-11 1:31 ` [PATCH 3/6] eal: add rte atomic qualifier with casts Tyler Retzlaff
2023-08-11 1:31 ` [PATCH 4/6] distributor: adapt for EAL optional atomics API changes Tyler Retzlaff
2023-08-11 1:32 ` [PATCH 5/6] bpf: " Tyler Retzlaff
2023-08-11 1:32 ` [PATCH 6/6] devtools: forbid new direct use of GCC atomic builtins Tyler Retzlaff
2023-08-11 8:57 ` Bruce Richardson
2023-08-11 9:51 ` Morten Brørup
2023-08-11 15:56 ` Tyler Retzlaff
2023-08-14 6:37 ` Morten Brørup
2023-08-11 17:32 ` [PATCH v2 0/6] RFC optional rte optional stdatomics API Tyler Retzlaff
2023-08-11 17:32 ` [PATCH v2 1/6] eal: provide rte stdatomics optional atomics API Tyler Retzlaff
2023-08-14 7:06 ` Morten Brørup
2023-08-11 17:32 ` [PATCH v2 2/6] eal: adapt EAL to present rte " Tyler Retzlaff
2023-08-14 8:00 ` Morten Brørup
2023-08-14 17:47 ` Tyler Retzlaff
2023-08-16 20:13 ` Morten Brørup
2023-08-16 20:32 ` Tyler Retzlaff
2023-08-11 17:32 ` [PATCH v2 3/6] eal: add rte atomic qualifier with casts Tyler Retzlaff
2023-08-14 8:05 ` Morten Brørup
2023-08-11 17:32 ` [PATCH v2 4/6] distributor: adapt for EAL optional atomics API changes Tyler Retzlaff
2023-08-14 8:07 ` Morten Brørup
2023-08-11 17:32 ` [PATCH v2 5/6] bpf: " Tyler Retzlaff
2023-08-14 8:11 ` Morten Brørup
2023-08-11 17:32 ` [PATCH v2 6/6] devtools: forbid new direct use of GCC atomic builtins Tyler Retzlaff
2023-08-14 8:12 ` Morten Brørup
2023-08-16 19:19 ` [PATCH v3 0/6] RFC optional rte optional stdatomics API Tyler Retzlaff
2023-08-16 19:19 ` [PATCH v3 1/6] eal: provide rte stdatomics optional atomics API Tyler Retzlaff
2023-08-16 20:55 ` Morten Brørup
2023-08-16 21:04 ` Tyler Retzlaff
2023-08-16 21:08 ` Morten Brørup
2023-08-16 21:10 ` Tyler Retzlaff
2023-08-16 19:19 ` [PATCH v3 2/6] eal: adapt EAL to present rte " Tyler Retzlaff
2023-08-16 19:19 ` [PATCH v3 3/6] eal: add rte atomic qualifier with casts Tyler Retzlaff
2023-08-16 19:19 ` [PATCH v3 4/6] distributor: adapt for EAL optional atomics API changes Tyler Retzlaff
2023-08-16 19:19 ` [PATCH v3 5/6] bpf: " Tyler Retzlaff
2023-08-16 19:19 ` [PATCH v3 6/6] devtools: forbid new direct use of GCC atomic builtins Tyler Retzlaff
2023-08-16 21:38 ` [PATCH v4 0/6] RFC optional rte optional stdatomics API Tyler Retzlaff
2023-08-16 21:38 ` [PATCH v4 1/6] eal: provide rte stdatomics optional atomics API Tyler Retzlaff
2023-08-17 11:45 ` Morten Brørup
2023-08-17 19:09 ` Tyler Retzlaff
2023-08-18 6:55 ` Morten Brørup
2023-08-16 21:38 ` [PATCH v4 2/6] eal: adapt EAL to present rte " Tyler Retzlaff
2023-08-16 21:38 ` [PATCH v4 3/6] eal: add rte atomic qualifier with casts Tyler Retzlaff
2023-08-16 21:38 ` [PATCH v4 4/6] distributor: adapt for EAL optional atomics API changes Tyler Retzlaff
2023-08-16 21:38 ` [PATCH v4 5/6] bpf: " Tyler Retzlaff
2023-08-16 21:38 ` [PATCH v4 6/6] devtools: forbid new direct use of GCC atomic builtins Tyler Retzlaff
2023-08-17 11:57 ` Morten Brørup
2023-08-17 19:14 ` Tyler Retzlaff
2023-08-18 7:13 ` Morten Brørup
2023-08-22 18:14 ` Tyler Retzlaff
2023-08-17 21:42 ` [PATCH v5 0/6] optional rte optional stdatomics API Tyler Retzlaff
2023-08-17 21:42 ` [PATCH v5 1/6] eal: provide rte stdatomics optional atomics API Tyler Retzlaff
2023-08-17 21:42 ` [PATCH v5 2/6] eal: adapt EAL to present rte " Tyler Retzlaff
2023-08-17 21:42 ` [PATCH v5 3/6] eal: add rte atomic qualifier with casts Tyler Retzlaff
2023-08-17 21:42 ` [PATCH v5 4/6] distributor: adapt for EAL optional atomics API changes Tyler Retzlaff
2023-08-17 21:42 ` [PATCH v5 5/6] bpf: " Tyler Retzlaff
2023-08-17 21:42 ` [PATCH v5 6/6] devtools: forbid new direct use of GCC atomic builtins Tyler Retzlaff
2023-08-21 22:27 ` [PATCH v5 0/6] optional rte optional stdatomics API Konstantin Ananyev
2023-08-22 21:00 ` [PATCH v6 0/6] rte atomics API for optional stdatomic Tyler Retzlaff
2023-08-22 21:00 ` [PATCH v6 1/6] eal: provide rte stdatomics optional atomics API Tyler Retzlaff
2023-09-28 8:06 ` Thomas Monjalon
2023-09-29 8:04 ` David Marchand
2023-09-29 8:54 ` Morten Brørup
2023-09-29 9:02 ` David Marchand
2023-09-29 9:26 ` Bruce Richardson
2023-09-29 9:34 ` David Marchand
2023-09-29 10:26 ` Thomas Monjalon
2023-09-29 11:38 ` David Marchand
2023-09-29 11:51 ` Thomas Monjalon
2023-08-22 21:00 ` [PATCH v6 2/6] eal: adapt EAL to present rte " Tyler Retzlaff
2023-08-22 21:00 ` [PATCH v6 3/6] eal: add rte atomic qualifier with casts Tyler Retzlaff
2023-08-22 21:00 ` [PATCH v6 4/6] distributor: adapt for EAL optional atomics API changes Tyler Retzlaff
2023-08-22 21:00 ` [PATCH v6 5/6] bpf: " Tyler Retzlaff
2023-08-22 21:00 ` [PATCH v6 6/6] devtools: forbid new direct use of GCC atomic builtins Tyler Retzlaff
2023-08-29 15:57 ` [PATCH v6 0/6] rte atomics API for optional stdatomic Tyler Retzlaff
2023-09-29 14:09 ` David Marchand
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