Partial Atomics support

Implement support for basic atomic operations on
SharedArrayBuffers.

Half of the methods still need a proper implementation.

Change-Id: Ia88da358e0c2ae6d28e9bcc1feb8980b6f51a812
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 20 insertions, 6 deletions

diff --git a/src/qml/jsruntime/qv4typedarray_p.h b/src/qml/jsruntime/qv4typedarray_p.h
index a5eabb168c..0a26bcb533 100644
--- a/src/qml/jsruntime/qv4typedarray_p.h
+++ b/src/qml/jsruntime/qv4typedarray_p.h
@@ -60,30 +60,44 @@ namespace QV4 {
 
 struct ArrayBuffer;
 
-typedef ReturnedValue (*TypedArrayRead)(const char *data);
-typedef void (*TypedArrayWrite)(char *data, Value value);
-
 enum TypedArrayType {
     Int8Array,
     UInt8Array,
-    UInt8ClampedArray,
     Int16Array,
     UInt16Array,
     Int32Array,
     UInt32Array,
+    UInt8ClampedArray,
     Float32Array,
     Float64Array,
     NTypedArrayTypes
 };
 
+enum AtomicModifyOps {
+    AtomicAdd,
+    AtomicAnd,
+    AtomicExchange,
+    AtomicOr,
+    AtomicSub,
+    AtomicXor,
+    NAtomicModifyOps
+};
+
 struct TypedArrayOperations {
+    typedef ReturnedValue (*Read)(const char *data);
+    typedef void (*Write)(char *data, Value value);
+    typedef ReturnedValue (*AtomicModify)(char *data, Value value);
+
     template<typename T>
     static constexpr TypedArrayOperations create(const char *name);
+    template<typename T>
+    static constexpr TypedArrayOperations createWithAtomics(const char *name);
 
     int bytesPerElement;
     const char *name;
-    TypedArrayRead read;
-    TypedArrayWrite write;
+    Read read;
+    Write write;
+    AtomicModify atomicModifyOps[AtomicModifyOps::NAtomicModifyOps];
 };
 
 namespace Heap {