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79fa9765ca
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/KString.h>
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extern bool g_in_early_boot;
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namespace Kernel {
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ErrorOr<NonnullOwnPtr<KString>> KString::try_create(StringView string)
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{
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char* characters = nullptr;
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size_t length = string.length();
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auto new_string = TRY(KString::try_create_uninitialized(length, characters));
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if (!string.is_empty())
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__builtin_memcpy(characters, string.characters_without_null_termination(), length);
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characters[length] = '\0';
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return new_string;
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}
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NonnullOwnPtr<KString> KString::must_create(StringView string)
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{
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// We can only enforce success during early boot.
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VERIFY(g_in_early_boot);
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return KString::try_create(string).release_value();
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}
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ErrorOr<NonnullOwnPtr<KString>> KString::try_create_uninitialized(size_t length, char*& characters)
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{
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size_t allocation_size = sizeof(KString) + (sizeof(char) * length) + sizeof(char);
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auto* slot = kmalloc(allocation_size);
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if (!slot)
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return ENOMEM;
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auto new_string = TRY(adopt_nonnull_own_or_enomem(new (slot) KString(length)));
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characters = new_string->m_characters;
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return new_string;
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}
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NonnullOwnPtr<KString> KString::must_create_uninitialized(size_t length, char*& characters)
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{
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// We can only enforce success during early boot.
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VERIFY(g_in_early_boot);
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return KString::try_create_uninitialized(length, characters).release_value();
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}
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ErrorOr<NonnullOwnPtr<KString>> KString::try_clone() const
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{
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return try_create(view());
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}
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void KString::operator delete(void* string)
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{
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if (!string)
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return;
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size_t allocation_size = sizeof(KString) + (sizeof(char) * static_cast<KString*>(string)->m_length) + sizeof(char);
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kfree_sized(string, allocation_size);
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}
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}
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