unittests/ADT/IntrusiveRefCntPtrTest.cpp

   1 //===- unittest/ADT/IntrusiveRefCntPtrTest.cpp ----------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "llvm/ADT/IntrusiveRefCntPtr.h"
  11 #include "gtest/gtest.h"
  12
  13 namespace llvm {
  14
  15 namespace {
  16 struct SimpleRefCounted : public RefCountedBase<SimpleRefCounted> {
  17   SimpleRefCounted() { ++NumInstances; }
  18   SimpleRefCounted(const SimpleRefCounted &) : RefCountedBase() {
  19     ++NumInstances;
  20   }
  21   ~SimpleRefCounted() { --NumInstances; }
  22
  23   static int NumInstances;
  24 };
  25 int SimpleRefCounted::NumInstances = 0;
  26 } // anonymous namespace
  27
  28 TEST(IntrusiveRefCntPtr, RefCountedBaseCopyDoesNotLeak) {
  29   EXPECT_EQ(0, SimpleRefCounted::NumInstances);
  30   {
  31     SimpleRefCounted *S1 = new SimpleRefCounted;
  32     IntrusiveRefCntPtr<SimpleRefCounted> R1 = S1;
  33     SimpleRefCounted *S2 = new SimpleRefCounted(*S1);
  34     IntrusiveRefCntPtr<SimpleRefCounted> R2 = S2;
  35     EXPECT_EQ(2, SimpleRefCounted::NumInstances);
  36   }
  37   EXPECT_EQ(0, SimpleRefCounted::NumInstances);
  38 }
  39
  40 struct InterceptRefCounted : public RefCountedBase<InterceptRefCounted> {
  41   InterceptRefCounted(bool *Released, bool *Retained)
  42     : Released(Released), Retained(Retained) {}
  43   bool * const Released;
  44   bool * const Retained;
  45 };
  46 template <> struct IntrusiveRefCntPtrInfo<InterceptRefCounted> {
  47   static void retain(InterceptRefCounted *I) {
  48     *I->Retained = true;
  49     I->Retain();
  50   }
  51   static void release(InterceptRefCounted *I) {
  52     *I->Released = true;
  53     I->Release();
  54   }
  55 };
  56 TEST(IntrusiveRefCntPtr, UsesTraitsToRetainAndRelease) {
  57   bool Released = false;
  58   bool Retained = false;
  59   {
  60     InterceptRefCounted *I = new InterceptRefCounted(&Released, &Retained);
  61     IntrusiveRefCntPtr<InterceptRefCounted> R = I;
  62   }
  63   EXPECT_TRUE(Released);
  64   EXPECT_TRUE(Retained);
  65 }
  66
  67 } // end namespace llvm