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Use C11 alignas in pg_atomic_uint64 definitions

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They were already using pg_attribute_aligned.  This replaces that with
alignas and moves that into the required syntactic position.  This
ends up making these three atomics implementations appear a bit more
consistent, but shouldn't change anything otherwise.

Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/46f05236-d4d4-4b4e-84d4-faa500f14691%40eisentraut.org
This commit is contained in:
Peter Eisentraut
2025-11-27 07:39:25 +01:00
parent 519fa0433b
commit e7075a3405
3 changed files with 4 additions and 5 deletions
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2
src/include/port/atomics/arch-ppc.h
View File

@@ -36,7 +36,7 @@ typedef struct pg_atomic_uint32
#define PG_HAVE_ATOMIC_U64_SUPPORT
typedef struct pg_atomic_uint64
{
volatile uint64 value pg_attribute_aligned(8);
alignas(8) volatile uint64 value;
} pg_atomic_uint64;
#endif

3
src/include/port/atomics/generic-gcc.h
View File

@@ -100,10 +100,9 @@ typedef struct pg_atomic_uint32
&& (defined(HAVE_GCC__ATOMIC_INT64_CAS) || defined(HAVE_GCC__SYNC_INT64_CAS))
#define PG_HAVE_ATOMIC_U64_SUPPORT
typedef struct pg_atomic_uint64
{
volatile uint64 value pg_attribute_aligned(8);
alignas(8) volatile uint64 value;
} pg_atomic_uint64;
#endif /* defined(HAVE_GCC__ATOMIC_INT64_CAS) || defined(HAVE_GCC__SYNC_INT64_CAS) */

4
src/include/port/atomics/generic-msvc.h
View File

@@ -37,9 +37,9 @@ typedef struct pg_atomic_uint32
} pg_atomic_uint32;
#define PG_HAVE_ATOMIC_U64_SUPPORT
typedef struct pg_attribute_aligned(8) pg_atomic_uint64
typedef struct pg_atomic_uint64
{
volatile uint64 value;
alignas(8) volatile uint64 value;
} pg_atomic_uint64;