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AK: Use TypedTransfer to move vector's inline buffer

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This avoids an explicit loop-move when the type is trivial.
This commit is contained in:
Ali Mohammad Pur 2022-11-03 10:33:52 +03:30 committed by Ali Mohammad Pur
parent 6970bf03a9
commit 48a4c9c1ad
Notes: sideshowbarker 2024-07-17 05:18:58 +09:00 
Author: https://github.com/alimpfard
Commit: https://github.com/SerenityOS/serenity/commit/48a4c9c1ad
Pull-request: https://github.com/SerenityOS/serenity/pull/15994
2 changed files with 17 additions and 6 deletions
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17
AK/TypedTransfer.h
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@ -31,7 +31,7 @@ public:
}
}
static size_t copy(T* destination, const T* source, size_t count)
static size_t copy(T* destination, T const* source, size_t count)
{
if (count == 0)
return 0;
@ -54,7 +54,7 @@ public:
return count;
}
static bool compare(const T* a, const T* b, size_t count)
static bool compare(T const* a, T const* b, size_t count)
{
if (count == 0)
return true;
@ -69,6 +69,19 @@ public:
return true;
}
static void delete_(T* ptr, size_t count)
{
if (count == 0)
return;
if constexpr (Traits<T>::is_trivial()) {
return;
}
for (size_t i = 0; i < count; ++i)
ptr[i].~T();
}
};
}

6
AK/Vector.h
View File

@ -73,10 +73,8 @@ public:
{
if constexpr (inline_capacity > 0) {
if (!m_outline_buffer) {
for (size_t i = 0; i < m_size; ++i) {
new (&inline_buffer()[i]) StorageType(move(other.inline_buffer()[i]));
other.inline_buffer()[i].~StorageType();
}
TypedTransfer<T>::move(inline_buffer(), other.inline_buffer(), m_size);
TypedTransfer<T>::delete_(other.inline_buffer(), m_size);
}
}
other.m_outline_buffer = nullptr;