system/serenity
system/serenity
1
0
Fork 0
mirror of https://github.com/SerenityOS/serenity synced 2024-07-21 18:15:58 +00:00
Code Issues Actions 5 Packages Projects Releases Wiki Activity

AK: Remove clear() from FixedArray and fixate its allocation guarantees

Browse source 
FixedArray always *almost* had the following allocation guarantees:
There is (possibly) one allocation in the constructor and one (or more)
deallocation(s) in the destructor. No other operation allocates or
deallocates. With this removal of the public clear() method, which
nobody except the test used anyways, those guarantees are now completely
true and furthermore fixated with an explanatory comment.
This commit is contained in:
kleines Filmröllchen 2022-01-12 22:28:43 +01:00 committed by Linus Groh
parent 9bf2d0b718
commit 1d144ed6fc
2 changed files with 3 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
AK/FixedArray.h
View file

@ -14,6 +14,8 @@
namespace AK {
// FixedArray is an Array with a size only known at run-time.
// It guarantees to only allocate when being constructed, and to only deallocate when being destructed.
template<typename T>
class FixedArray {
public:
@ -68,17 +70,13 @@ public:
FixedArray<T>& operator=(FixedArray<T>&&) = delete;
~FixedArray()
{
clear();
}
void clear()
{
if (!m_elements)
return;
for (size_t i = 0; i < m_size; ++i)
m_elements[i].~T();
kfree_sized(m_elements, sizeof(T) * m_size);
// NOTE: should prevent use-after-free early
m_size = 0;
m_elements = nullptr;
}

3
Tests/AK/TestFixedArray.cpp
View file

@ -23,7 +23,4 @@ TEST_CASE(ints)
EXPECT_EQ(ints[0], 0);
EXPECT_EQ(ints[1], 1);
EXPECT_EQ(ints[2], 2);
ints.clear();
EXPECT_EQ(ints.size(), 0u);
}