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Kernel: Use fallible KBuffer API in PerformanceEventBuffer

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This commit is contained in:
Andreas Kling 2020-12-18 20:43:39 +01:00
parent fb9a71bd6a
commit d893498e57
2 changed files with 9 additions and 4 deletions
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4
Kernel/PerformanceEventBuffer.cpp
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@ -33,7 +33,7 @@
namespace Kernel { namespace Kernel {
PerformanceEventBuffer::PerformanceEventBuffer() PerformanceEventBuffer::PerformanceEventBuffer()
: m_buffer(KBuffer::create_with_size(4 * MiB)) : m_buffer(KBuffer::try_create_with_size(4 * MiB))
{ {
} }
@ -89,7 +89,7 @@ KResult PerformanceEventBuffer::append(int type, FlatPtr arg1, FlatPtr arg2)
PerformanceEvent& PerformanceEventBuffer::at(size_t index) PerformanceEvent& PerformanceEventBuffer::at(size_t index)
{ {
ASSERT(index < capacity()); ASSERT(index < capacity());
auto* events = reinterpret_cast<PerformanceEvent*>(m_buffer.data()); auto* events = reinterpret_cast<PerformanceEvent*>(m_buffer->data());
return events[index]; return events[index];
} }

9
Kernel/PerformanceEventBuffer.h
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@ -61,7 +61,12 @@ public:
KResult append(int type, FlatPtr arg1, FlatPtr arg2); KResult append(int type, FlatPtr arg1, FlatPtr arg2);
size_t capacity() const { return m_buffer.size() / sizeof(PerformanceEvent); } size_t capacity() const
{
if (!m_buffer)
return 0;
return m_buffer->size() / sizeof(PerformanceEvent);
}
size_t count() const { return m_count; } size_t count() const { return m_count; }
const PerformanceEvent& at(size_t index) const const PerformanceEvent& at(size_t index) const
{ {
@ -74,7 +79,7 @@ private:
PerformanceEvent& at(size_t index); PerformanceEvent& at(size_t index);
size_t m_count { 0 }; size_t m_count { 0 };
KBuffer m_buffer; OwnPtr<KBuffer> m_buffer;
}; };
} }