[PATCH v2 1/2] include: add atomic read/write of pointers

[Yuxuan Shui]

From: Yuxuan Shui

---
 include/winnt.h | 68 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 67 insertions(+), 1 deletion(-)

diff --git a/include/winnt.h b/include/winnt.h
index e8a47fec963..c94d1e497ad 100644
--- a/include/winnt.h
+++ b/include/winnt.h
@@ -4334,7 +4334,7 @@ typedef struct _ACL {

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

@@ -7149,6 +7149,18 @@ static FORCEINLINE LONG64 ReadAcquire64( LONG64 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 );
@@ -7170,6 +7182,17 @@ static FORCEINLINE LONG64 ReadNoFence64( LONG64 const volatile *src )
     return value;
 }

+static FORCEINLINE void* ReadPointerNoFence( 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
+    return value;
+}
+
 static FORCEINLINE void WriteRelease( LONG volatile *dest, LONG value )
 {
     __wine_memory_barrier_acq_rel();
@@ -7190,11 +7213,30 @@ static FORCEINLINE void WriteRelease64( LONG64 volatile *dest, LONG64 value )
 #endif
 }

+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 );
 }

+static FORCEINLINE void WritePointerNoFence( void* volatile *dest, void* value )
+{
+#ifdef _WIN64
+    __WINE_STORE64_NO_FENCE( (INT64 volatile *)dest, (INT64)value );
+#else
+    __WINE_STORE32_NO_FENCE( (INT32 volatile *)dest, (INT32)value );
+#endif
+}
+
 #elif defined(__GNUC__)

static FORCEINLINE BOOLEAN WINAPI BitScanForward(DWORD *index, DWORD mask)
@@ -7374,6 +7416,13 @@ static FORCEINLINE LONG64 ReadAcquire64( LONG64 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;
@@ -7392,6 +7441,13 @@ static FORCEINLINE LONG64 ReadNoFence64( LONG64 const volatile *src )
     return value;
 }

+static FORCEINLINE void *ReadPointerNoFence( void *const volatile *src )
+{
+    void *value;
+    __WINE_ATOMIC_LOAD_RELAXED( src, &value );
+    return value;
+}
+
 static FORCEINLINE void WriteRelease( LONG volatile *dest, LONG value )
 {
     __WINE_ATOMIC_STORE_RELEASE( dest, &value );
@@ -7411,6 +7467,16 @@ 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 void WritePointerNoFence( void *volatile *src, void *value )
+{
+    __WINE_ATOMIC_STORE_RELAXED( src, &value );
+}
+
 static FORCEINLINE DECLSPEC_NORETURN void __fastfail(unsigned int code)
 {
 #if defined(__x86_64__) || defined(__i386__)