53 lines
1.5 KiB
Diff
53 lines
1.5 KiB
Diff
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From: Tom Lane <tgl@sss.pgh.pa.us>
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Date: Tue, 4 Jun 2013 19:42:02 +0000 (-0400)
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Subject: Add ARM64 (aarch64) support to s_lock.h.
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X-Git-Url: http://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff_plain;h=612ecf311bf253cdb0c54252854c5298aa668203
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Add ARM64 (aarch64) support to s_lock.h.
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Use the same gcc atomic functions as we do on newer ARM chips.
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(Basically this is a copy and paste of the __arm__ code block,
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but omitting the SWPB option since that definitely won't work.)
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Back-patch to 9.2. The patch would work further back, but we'd also
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need to update config.guess/config.sub in older branches to make them
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build out-of-the-box, and there hasn't been demand for it.
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Mark Salter
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---
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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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