2013-09-10 14:01:09 +00:00
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Add support for atomic operations TAS/S_UNLOCK in aarch64
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This was already added to upstream 9.3.0+ version but we need to add this into
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pre-upgrade postgresql version (until we are not upgrading also from 9.3.0+).
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~> upstream (612ecf311b)
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~> #970661
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2013-06-05 07:34:58 +00:00
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diff --git a/src/include/storage/s_lock.h b/src/include/storage/s_lock.h
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index d4a783f..29124b1 100644
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--- a/src/include/storage/s_lock.h
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+++ b/src/include/storage/s_lock.h
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@@ -335,6 +335,29 @@ tas(volatile slock_t *lock)
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#endif /* __arm__ */
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+/*
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+ * On ARM64, we use __sync_lock_test_and_set(int *, int) if available.
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+ */
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+#if defined(__aarch64__) || defined(__aarch64)
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+#ifdef HAVE_GCC_INT_ATOMICS
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+#define HAS_TEST_AND_SET
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+
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+#define TAS(lock) tas(lock)
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+
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+typedef int slock_t;
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+
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+static __inline__ int
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+tas(volatile slock_t *lock)
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+{
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+ return __sync_lock_test_and_set(lock, 1);
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+}
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+
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+#define S_UNLOCK(lock) __sync_lock_release(lock)
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+
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+#endif /* HAVE_GCC_INT_ATOMICS */
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+#endif /* __aarch64__ */
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+
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+
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/* S/390 and S/390x Linux (32- and 64-bit zSeries) */
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#if defined(__s390__) || defined(__s390x__)
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#define HAS_TEST_AND_SET
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