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AK: Introduce adopt_ref_if_nonnull(..) to aid in Kernel OOM hardening
Unfortunately adopt_ref requires a reference, which obviously does not work well with when attempting to harden against allocation failure. The adopt_ref_if_nonnull() variant will allow you to avoid using bare pointers, while still allowing you to handle allocation failure.
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@ -147,3 +147,14 @@ TEST_CASE(self_observers)
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object->unref();
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EXPECT_EQ(SelfAwareObject::num_destroyed, 1u);
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}
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TEST_CASE(adopt_ref_if_nonnull)
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{
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RefPtr<SelfAwareObject> object = adopt_ref_if_nonnull(new SelfAwareObject);
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EXPECT_EQ(object.is_null(), false);
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EXPECT_EQ(object->ref_count(), 1u);
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SelfAwareObject* null_object = nullptr;
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RefPtr<SelfAwareObject> failed_allocation = adopt_ref_if_nonnull(null_object);
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EXPECT_EQ(failed_allocation.is_null(), true);
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}
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