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AK: Fix ref leaks in RefPtr assignment operators.

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Many of the RefPtr assignment operators would cause ref leaks when we
call them to assign a pointer that's already the one kept.
This commit is contained in:
Andreas Kling 2019-08-02 11:56:55 +02:00
parent 06f82901b7
commit cbc1272810
3 changed files with 89 additions and 37 deletions
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60
AK/Tests/TestRefPtr.cpp Normal file
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#include <AK/TestSuite.h>
#include <AK/NonnullRefPtr.h>
#include <AK/AKString.h>
struct Object : public RefCounted<Object> {
int x;
};
TEST_CASE(basics)
{
RefPtr<Object> object = adopt(*new Object);
EXPECT(object.ptr() != nullptr);
EXPECT_EQ(object->ref_count(), 1);
object->ref();
EXPECT_EQ(object->ref_count(), 2);
object->deref();
EXPECT_EQ(object->ref_count(), 1);
{
NonnullRefPtr another = *object;
EXPECT_EQ(object->ref_count(), 2);
}
EXPECT_EQ(object->ref_count(), 1);
}
TEST_CASE(assign_reference)
{
RefPtr<Object> object = adopt(*new Object);
EXPECT_EQ(object->ref_count(), 1);
object = *object;
EXPECT_EQ(object->ref_count(), 1);
}
TEST_CASE(assign_ptr)
{
RefPtr<Object> object = adopt(*new Object);
EXPECT_EQ(object->ref_count(), 1);
object = object.ptr();
EXPECT_EQ(object->ref_count(), 1);
}
TEST_CASE(assign_moved_self)
{
RefPtr<Object> object = adopt(*new Object);
EXPECT_EQ(object->ref_count(), 1);
object = move(object);
EXPECT_EQ(object->ref_count(), 1);
}
TEST_CASE(assign_copy_self)
{
RefPtr<Object> object = adopt(*new Object);
EXPECT_EQ(object->ref_count(), 1);
object = object;
EXPECT_EQ(object->ref_count(), 1);
}
TEST_MAIN(String)