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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.cpp
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@@ -46,8 +46,14 @@ OwnPtr<KBuffer> KBufferBuilder::build()
return move(m_buffer);
}
KBufferBuilder::KBufferBuilder()
: m_buffer(KBuffer::try_create_with_size(4 * MiB, Memory::Region::Access::ReadWrite).release_value())
KResultOr<KBufferBuilder> KBufferBuilder::try_create()
{
auto buffer = TRY(KBuffer::try_create_with_size(4 * MiB, Memory::Region::Access::ReadWrite));
return KBufferBuilder { move(buffer) };
}
KBufferBuilder::KBufferBuilder(NonnullOwnPtr<KBuffer> buffer)
: m_buffer(move(buffer))
{
}