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AK: Use __builtin_memset() and such to reduce header dependencies

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We can use __builtin_memset() without including <string.h>.
This is pretty neat, as it will allow us to reduce the header deps
of AK templates a bit, if applied consistently.

Note that this is an enabling change for an upcoming #include removal.
This commit is contained in:
Andreas Kling 2020-03-08 11:57:24 +01:00
parent b1058b33fb
commit 35d88f536c
5 changed files with 14 additions and 14 deletions
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4
AK/Bitmap.h
View file

@ -112,7 +112,7 @@ public:
fill(default_value);
if (previous_data != nullptr) {
memcpy(m_data, previous_data, previous_size_bytes);
__builtin_memcpy(m_data, previous_data, previous_size_bytes);
if ((previous_size % 8) != 0) {
if (default_value)
@ -127,7 +127,7 @@ public:
void fill(bool value)
{
memset(m_data, value ? 0xff : 0x00, size_in_bytes());
__builtin_memset(m_data, value ? 0xff : 0x00, size_in_bytes());
}
Optional<size_t> find_first_set() const

8
AK/ByteBuffer.h
View file

@ -213,7 +213,7 @@ public:
{
int old_size = size();
grow(size() + data_size);
memcpy(this->data() + old_size, data, data_size);
__builtin_memcpy(this->data() + old_size, data, data_size);
}
private:
@ -237,7 +237,7 @@ inline ByteBufferImpl::ByteBufferImpl(const void* data, size_t size, Constructio
{
ASSERT(mode == Copy);
m_data = static_cast<u8*>(kmalloc(size));
memcpy(m_data, data, size);
__builtin_memcpy(m_data, data, size);
m_owned = true;
}
@ -257,7 +257,7 @@ inline void ByteBufferImpl::grow(size_t size)
ASSERT(size > m_size);
ASSERT(m_owned);
u8* new_data = static_cast<u8*>(kmalloc(size));
memcpy(new_data, m_data, m_size);
__builtin_memcpy(new_data, m_data, m_size);
u8* old_data = m_data;
m_data = new_data;
m_size = size;
@ -272,7 +272,7 @@ inline NonnullRefPtr<ByteBufferImpl> ByteBufferImpl::create_uninitialized(size_t
inline NonnullRefPtr<ByteBufferImpl> ByteBufferImpl::create_zeroed(size_t size)
{
auto buffer = ::adopt(*new ByteBufferImpl(size));
memset(buffer->data(), 0, size);
__builtin_memset(buffer->data(), 0, size);
return buffer;
}

2
AK/Optional.h
View file

@ -157,7 +157,7 @@ private:
ASSERT(m_has_value);
return *reinterpret_cast<const T*>(&m_storage);
}
u8 m_storage[sizeof(T)] { 0 };
unsigned char m_storage[sizeof(T)] { 0 };
bool m_has_value { false };
};

6
AK/String.h
View file

@ -177,7 +177,7 @@ public:
return !cstring;
if (!cstring)
return false;
return !strcmp(characters(), cstring);
return !__builtin_strcmp(characters(), cstring);
}
bool operator!=(const char* cstring) const
@ -273,7 +273,7 @@ inline bool operator<(const char* characters, const String& string)
if (string.is_null())
return false;
return strcmp(characters, string.characters()) < 0;
return __builtin_strcmp(characters, string.characters()) < 0;
}
inline bool operator>=(const char* characters, const String& string)
@ -289,7 +289,7 @@ inline bool operator>(const char* characters, const String& string)
if (string.is_null())
return false;
return strcmp(characters, string.characters()) > 0;
return __builtin_strcmp(characters, string.characters()) > 0;
}
inline bool operator<=(const char* characters, const String& string)

8
AK/Vector.h
View file

@ -96,7 +96,7 @@ public:
if (!count)
return;
if constexpr (Traits<T>::is_trivial()) {
memmove(destination, source, count * sizeof(T));
__builtin_memmove(destination, source, count * sizeof(T));
return;
}
for (size_t i = 0; i < count; ++i)
@ -108,7 +108,7 @@ public:
if (!count)
return;
if constexpr (Traits<T>::is_trivial()) {
memmove(destination, source, count * sizeof(T));
__builtin_memmove(destination, source, count * sizeof(T));
return;
}
for (size_t i = 0; i < count; ++i)
@ -121,7 +121,7 @@ public:
return true;
if constexpr (Traits<T>::is_trivial())
return !memcmp(a, b, count * sizeof(T));
return !__builtin_memcmp(a, b, count * sizeof(T));
for (size_t i = 0; i < count; ++i) {
if (a[i] != b[i])
@ -641,7 +641,7 @@ private:
size_t m_size { 0 };
size_t m_capacity { 0 };
alignas(T) u8 m_inline_buffer_storage[sizeof(T) * inline_capacity];
alignas(T) unsigned char m_inline_buffer_storage[sizeof(T) * inline_capacity];
T* m_outline_buffer { nullptr };
};