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Kernel: Make it possible for KBufferBuilder creation to fail

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This patch adds KBufferBuilder::try_create() and treats it like anything
else that can fail. And so, failure to allocate the initial internal
buffer of the builder will now propagate an ENOMEM to the caller. :^)
This commit is contained in:
Andreas Kling 2021-09-07 15:54:23 +02:00
parent be613b9ef6
commit 300402cc14
9 changed files with 30 additions and 13 deletions
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10
Kernel/KBufferBuilder.h
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@ -6,18 +6,22 @@
#pragma once
#include <AK/String.h>
#include <AK/StringView.h>
#include <Kernel/KBuffer.h>
#include <stdarg.h>
namespace Kernel {
class KBufferBuilder {
AK_MAKE_NONCOPYABLE(KBufferBuilder);
public:
using OutputType = KBuffer;
KBufferBuilder();
static KResultOr<KBufferBuilder> try_create();
KBufferBuilder(KBufferBuilder&&) = default;
KBufferBuilder& operator=(KBufferBuilder&&) = default;
~KBufferBuilder() = default;
KResult append(const StringView&);
@ -48,6 +52,8 @@ public:
}
private:
explicit KBufferBuilder(NonnullOwnPtr<KBuffer>);
bool check_expand(size_t);
u8* insertion_ptr()
{