Add support for atomic wait and wake operators (#1140)

According to spec at https://github.com/WebAssembly/threads/blob/master/proposals/threads/Overview.md#wait-and-wake-operators

1 files changed, 26 insertions, 0 deletions

diff --git a/src/wasm.h b/src/wasm.h
index 974bf1730..e9782ab6e 100644
--- a/src/wasm.h
+++ b/src/wasm.h
@@ -183,6 +183,8 @@ public:
     UnreachableId,
     AtomicCmpxchgId,
     AtomicRMWId,
+    AtomicWaitId,
+    AtomicWakeId,
     NumExpressionIds
   };
   Id _id;
@@ -456,6 +458,30 @@ class AtomicCmpxchg : public SpecificExpression<Expression::AtomicCmpxchgId> {
   void finalize();
 };
 
+class AtomicWait : public SpecificExpression<Expression::AtomicWaitId> {
+ public:
+  AtomicWait() = default;
+  AtomicWait(MixedArena& allocator) : AtomicWait() {}
+
+  Expression* ptr;
+  Expression* expected;
+  Expression* timeout;
+  WasmType expectedType;
+
+  void finalize();
+};
+
+class AtomicWake : public SpecificExpression<Expression::AtomicWakeId> {
+ public:
+  AtomicWake() = default;
+  AtomicWake(MixedArena& allocator) : AtomicWake() {}
+
+  Expression* ptr;
+  Expression* wakeCount;
+
+  void finalize();
+};
+
 class Const : public SpecificExpression<Expression::ConstId> {
 public:
   Const() {}