[PATCH v20 1/4] include: add atomic read/write of pointers

[Yuxuan Shui]

From: Yuxuan Shui

---
 include/winnt.h | 48 +++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 45 insertions(+), 3 deletions(-)

diff --git a/include/winnt.h b/include/winnt.h
index 2e1aac0f477..6bb5d3f0c64 100644
--- a/include/winnt.h
+++ b/include/winnt.h
@@ -4245,7 +4245,7 @@ typedef struct _ACL {

typedef enum _ACL_INFORMATION_CLASS
 {
-  AclRevisionInformation = 1, 
+  AclRevisionInformation = 1,
   AclSizeInformation
 } ACL_INFORMATION_CLASS;

@@ -6912,12 +6912,20 @@ static FORCEINLINE void MemoryBarrier(void)
  */
 #if _MSC_VER >= 1700
 #pragma intrinsic(__iso_volatile_load32)
+#pragma intrinsic(__iso_volatile_load64)
 #pragma intrinsic(__iso_volatile_store32)
+#pragma intrinsic(__iso_volatile_store64)
 #define __WINE_LOAD32_NO_FENCE(src) (__iso_volatile_load32(src))
+#define __WINE_LOAD64_NO_FENCE(src) (__iso_volatile_load64(src))
 #define __WINE_STORE32_NO_FENCE(dest, value) (__iso_volatile_store32(dest, value))
+#define __WINE_STORE64_NO_FENCE(dest, value) (__iso_volatile_store64(dest, value))
 #else  /* _MSC_VER >= 1700 */
-#define __WINE_LOAD32_NO_FENCE(src) (*(src))
-#define __WINE_STORE32_NO_FENCE(dest, value) ((void)(*(dest) = (value)))
+#define __WINE_LOAD_NO_FENCE(src) (*(src))
+#define __WINE_STORE_NO_FENCE(dest, value) ((void)(*(dest) = (value)))
+#define __WINE_LOAD32_NO_FENCE(src) __WINE_LOAD_NO_FENCE(src)
+#define __WINE_LOAD64_NO_FENCE(src) __WINE_LOAD_NO_FENCE(src)
+#define __WINE_STORE32_NO_FENCE(dest, value) __WINE_STORE_NO_FENCE(dest, value)
+#define __WINE_STORE64_NO_FENCE(dest, value) __WINE_STORE_NO_FENCE(dest, value)
 #endif  /* _MSC_VER >= 1700 */

#if defined(__i386__) || defined(__x86_64__)
@@ -6944,6 +6952,18 @@ static FORCEINLINE LONG ReadAcquire( LONG const volatile *src )
     return value;
 }

+static FORCEINLINE void* ReadPointerAcquire( void* const volatile *src )
+{
+    void *value;
+#ifdef _WIN64
+    value = (void *)__WINE_LOAD64_NO_FENCE( (INT64 const volatile *)src );
+#else
+    value = (void *)__WINE_LOAD32_NO_FENCE( (INT32 const volatile *)src );
+#endif
+    __wine_memory_barrier_acq_rel();
+    return value;
+}
+
 static FORCEINLINE LONG ReadNoFence( LONG const volatile *src )
 {
     LONG value = __WINE_LOAD32_NO_FENCE( (int const volatile *)src );
@@ -6956,6 +6976,16 @@ static FORCEINLINE void WriteRelease( LONG volatile *dest, LONG value )
     __WINE_STORE32_NO_FENCE( (int volatile *)dest, value );
 }

+static FORCEINLINE void WritePointerRelease( void* volatile *dest, void* value )
+{
+    __wine_memory_barrier_acq_rel();
+#ifdef _WIN64
+    __WINE_STORE64_NO_FENCE( (INT64 volatile *)dest, (INT64)value );
+#else
+    __WINE_STORE32_NO_FENCE( (INT32 volatile *)dest, (INT32)value );
+#endif
+}
+
 static FORCEINLINE void WriteNoFence( LONG volatile *dest, LONG value )
 {
     __WINE_STORE32_NO_FENCE( (int volatile *)dest, value );
@@ -7124,6 +7154,13 @@ static FORCEINLINE LONG ReadAcquire( LONG const volatile *src )
     return value;
 }

+static FORCEINLINE void *ReadPointerAcquire( void *const volatile *src )
+{
+    void *value;
+    __WINE_ATOMIC_LOAD_ACQUIRE( src, &value );
+    return value;
+}
+
 static FORCEINLINE LONG ReadNoFence( LONG const volatile *src )
 {
     LONG value;
@@ -7141,6 +7178,11 @@ static FORCEINLINE void WriteNoFence( LONG volatile *dest, LONG value )
     __WINE_ATOMIC_STORE_RELAXED( dest, &value );
 }

+static FORCEINLINE void WritePointerRelease( void *volatile *src, void *value )
+{
+    __WINE_ATOMIC_STORE_RELEASE( src, &value );
+}
+
 static FORCEINLINE DECLSPEC_NORETURN void __fastfail(unsigned int code)
 {
 #if defined(__x86_64__) || defined(__i386__)