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5ef0a07a79
herdtools 7.56 has enhanced herd7's C parser so that the "(void)expr" construct in Atomic-RMW-ops-are-atomic-WRT-atomic_set.litmus is accepted. This is independent of LKMM's cat model, so mention the required version in the header of the litmus test and its entry in README. CC: Boqun Feng <boqun.feng@gmail.com> Reported-by: Andrea Parri <parri.andrea@gmail.com> Acked-by: Andrea Parri <parri.andrea@gmail.com> Signed-off-by: Akira Yokosawa <akiyks@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
25 lines
357 B
Text
25 lines
357 B
Text
C Atomic-RMW-ops-are-atomic-WRT-atomic_set
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(*
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* Result: Never
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*
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* Test that atomic_set() cannot break the atomicity of atomic RMWs.
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* NOTE: This requires herd7 7.56 or later which supports "(void)expr".
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*)
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{
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atomic_t v = ATOMIC_INIT(1);
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}
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P0(atomic_t *v)
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{
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(void)atomic_add_unless(v, 1, 0);
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}
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P1(atomic_t *v)
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{
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atomic_set(v, 0);
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}
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exists
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(v=2)
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