Fix modify!; return a Pair (#6)

Project.toml

@@ -1,7 +1,7 @@
 name = "UnsafeAtomics"
 uuid = "013be700-e6cd-48c3-b4a1-df204f14c38f"
 authors = ["Takafumi Arakaki <[email protected]> and contributors"]
-version = "0.1.1-DEV"
+version = "0.2.0-DEV"
 
 [compat]
 julia = "1"

src/core.jl

@@ -149,7 +149,7 @@ for typ in inttypes
                     x,
                     v,
                 )
-                return (old, $op(old, v))
+                return old => $op(old, v)
             end
         end
     end

test/UnsafeAtomicsTests/src/test_core.jl

@@ -26,7 +26,7 @@ function test_default_ordering(T::Type)
         @test xs[1] === x2
         @testset for (op, name) in OP_RMW_TABLE
             xs[1] = x1
-            @test UnsafeAtomics.modify!(ptr, op, x2) === (x1, op(x1, x2))
+            @test UnsafeAtomics.modify!(ptr, op, x2) === (x1 => op(x1, x2))
             @test xs[1] === op(x1, x2)
 
             rmw = getfield(UnsafeAtomics, Symbol(name, :!))
@@ -54,7 +54,7 @@ function test_explicit_ordering(T::Type = UInt)
         @test xs[1] === x2
         @testset for (op, name) in OP_RMW_TABLE
             xs[1] = x1
-            @test UnsafeAtomics.modify!(ptr, op, x2, acq_rel) === (x1, op(x1, x2))
+            @test UnsafeAtomics.modify!(ptr, op, x2, acq_rel) === (x1 => op(x1, x2))
             @test xs[1] === op(x1, x2)
 
             rmw = getfield(UnsafeAtomics, Symbol(name, :!))