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From cd2b91c62ea74f6448a8a5cff5dd316f8e692e97 Mon Sep 17 00:00:00 2001
From: Seungha Yang <seungha@centricular.com>
Date: Sun, 4 Apr 2021 15:52:15 +0900
Subject: [PATCH] atomic: Add support for WIN32 atomic operations
Windows provides atomic operation APIs so use it
---
src/cairo-atomic-private.h | 61 ++++++++++++++++++++++++++++++++++++++
1 file changed, 61 insertions(+)
diff --git a/src/cairo-atomic-private.h b/src/cairo-atomic-private.h
index 46761856f..70d4b79d6 100644
--- a/src/cairo-atomic-private.h
+++ b/src/cairo-atomic-private.h
@@ -279,6 +279,67 @@ typedef int64_t cairo_atomic_intptr_t;
#endif
+#if !defined(HAS_ATOMIC_OPS) && defined(_WIN32)
+#include <windows.h>
+
+#define HAS_ATOMIC_OPS 1
+
+typedef int32_t cairo_atomic_int_t;
+
+#if SIZEOF_VOID_P==SIZEOF_INT
+typedef unsigned int cairo_atomic_intptr_t;
+#elif SIZEOF_VOID_P==SIZEOF_LONG
+typedef unsigned long cairo_atomic_intptr_t;
+#elif SIZEOF_VOID_P==SIZEOF_LONG_LONG
+typedef unsigned long long cairo_atomic_intptr_t;
+#else
+#error No matching integer pointer type
+#endif
+
+static cairo_always_inline cairo_atomic_int_t
+_cairo_atomic_int_get (cairo_atomic_int_t *x)
+{
+ MemoryBarrier ();
+ return *x;
+}
+
+# define _cairo_atomic_int_get_relaxed(x) *(x)
+# define _cairo_atomic_int_set_relaxed(x, val) *(x) = (val)
+
+# define _cairo_atomic_int_inc(x) ((void) InterlockedIncrement (x))
+# define _cairo_atomic_int_dec(x) ((void) InterlockedDecrement (x))
+# define _cairo_atomic_int_dec_and_test(x) (InterlockedDecrement (x) == 0)
+
+static cairo_always_inline cairo_bool_t
+_cairo_atomic_int_cmpxchg (cairo_atomic_int_t *x,
+ cairo_atomic_int_t oldv,
+ cairo_atomic_int_t newv)
+{
+ return InterlockedCompareExchange (x, newv, oldv) == oldv;
+}
+
+static cairo_always_inline void *
+_cairo_atomic_ptr_get (void **x)
+{
+ MemoryBarrier ();
+ return *x;
+}
+
+static cairo_always_inline cairo_bool_t
+_cairo_atomic_ptr_cmpxchg (void **x, void *oldv, void *newv)
+{
+ return InterlockedCompareExchangePointer (x, newv, oldv) == oldv;
+}
+
+static cairo_always_inline void *
+_cairo_atomic_ptr_cmpxchg_return_old (void **x, void *oldv, void *newv)
+{
+ return InterlockedCompareExchangePointer (x, newv, oldv);
+}
+
+#endif /* !defined(HAS_ATOMIC_OPS) && defined(_WIN32) */
+
+
#ifndef HAS_ATOMIC_OPS
#if SIZEOF_VOID_P==SIZEOF_INT
--
2.25.1
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