init

2026-04-07 13:35:22 +08:00
commit 0120fa9ce3
1530 changed files with 424864 additions and 0 deletions
--- a/db_include/port/atomics/generic-sunpro.h
+++ b/db_include/port/atomics/generic-sunpro.h
@@ -0,0 +1,106 @@
+/*-------------------------------------------------------------------------
+ *
+ * generic-sunpro.h
+ *	  Atomic operations for solaris' CC
+ *
+ * Portions Copyright (c) 2013-2021, PostgreSQL Global Development Group
+ *
+ * NOTES:
+ *
+ * Documentation:
+ * * manpage for atomic_cas(3C)
+ *   http://www.unix.com/man-page/opensolaris/3c/atomic_cas/
+ *   http://docs.oracle.com/cd/E23824_01/html/821-1465/atomic-cas-3c.html
+ *
+ * src/include/port/atomics/generic-sunpro.h
+ *
+ * -------------------------------------------------------------------------
+ */
+
+#if defined(HAVE_ATOMICS)
+
+#ifdef HAVE_MBARRIER_H
+#include <mbarrier.h>
+
+#define pg_compiler_barrier_impl()	__compiler_barrier()
+
+#ifndef pg_memory_barrier_impl
+/*
+ * Despite the name this is actually a full barrier. Expanding to mfence/
+ * membar #StoreStore | #LoadStore | #StoreLoad | #LoadLoad on x86/sparc
+ * respectively.
+ */
+#	define pg_memory_barrier_impl()		__machine_rw_barrier()
+#endif
+#ifndef pg_read_barrier_impl
+#	define pg_read_barrier_impl()		__machine_r_barrier()
+#endif
+#ifndef pg_write_barrier_impl
+#	define pg_write_barrier_impl()		__machine_w_barrier()
+#endif
+
+#endif /* HAVE_MBARRIER_H */
+
+/* Older versions of the compiler don't have atomic.h... */
+#ifdef HAVE_ATOMIC_H
+
+#include <atomic.h>
+
+#define PG_HAVE_ATOMIC_U32_SUPPORT
+typedef struct pg_atomic_uint32
+{
+	volatile uint32 value;
+} pg_atomic_uint32;
+
+#define PG_HAVE_ATOMIC_U64_SUPPORT
+typedef struct pg_atomic_uint64
+{
+	/*
+	 * Syntax to enforce variable alignment should be supported by versions
+	 * supporting atomic.h, but it's hard to find accurate documentation. If
+	 * it proves to be a problem, we'll have to add more version checks for 64
+	 * bit support.
+	 */
+	volatile uint64 value pg_attribute_aligned(8);
+} pg_atomic_uint64;
+
+#endif /* HAVE_ATOMIC_H */
+
+#endif /* defined(HAVE_ATOMICS) */
+
+
+#if defined(HAVE_ATOMICS)
+
+#ifdef HAVE_ATOMIC_H
+
+#define PG_HAVE_ATOMIC_COMPARE_EXCHANGE_U32
+static inline bool
+pg_atomic_compare_exchange_u32_impl(volatile pg_atomic_uint32 *ptr,
+									uint32 *expected, uint32 newval)
+{
+	bool	ret;
+	uint32	current;
+
+	current = atomic_cas_32(&ptr->value, *expected, newval);
+	ret = current == *expected;
+	*expected = current;
+	return ret;
+}
+
+#define PG_HAVE_ATOMIC_COMPARE_EXCHANGE_U64
+static inline bool
+pg_atomic_compare_exchange_u64_impl(volatile pg_atomic_uint64 *ptr,
+									uint64 *expected, uint64 newval)
+{
+	bool	ret;
+	uint64	current;
+
+	current = atomic_cas_64(&ptr->value, *expected, newval);
+	ret = current == *expected;
+	*expected = current;
+	return ret;
+}
+
+#endif /* HAVE_ATOMIC_H */
+
+#endif /* defined(HAVE_ATOMICS) */