YIHONG-JIN commented on code in PR #11890:
URL: https://github.com/apache/trafficserver/pull/11890#discussion_r1936668534
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src/iocore/eventsystem/P_PipeIOBuffer.h:
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@@ -0,0 +1,503 @@
+//
+// Created by Yihong Jin on 1/26/25.
+//
+#pragma once
+
+#include "tscore/ink_platform.h"
+#include "tscore/ink_resource.h"
+
+#if TS_USE_LINUX_SPLICE
+extern ClassAllocator<PipeIOBuffer> pipeIOAllocator;
+
+TS_INLINE PipeIOBuffer *
+new_PipeIOBuffer_internal(const char *location, int64_t pipe_capacity)
+{
+ PipeIOBuffer *b = THREAD_ALLOC(pipeIOAllocator, this_thread());
+ b->_location = location;
+ b->alloc(pipe_capacity);
+ b->water_mark = 0;
+ return b;
+}
+
+TS_INLINE void
+free_PipeIOBuffer(PipeIOBuffer *mio)
+{
+ // static cast to PipeIOBuffer
+ PipeIOBuffer *b = static_cast<PipeIOBuffer *>(mio);
+ b->clear();
+ THREAD_FREE(b, pipeIOAllocator, this_thread());
+}
+
+//////////////////////////////////////////////////////////////////
+//
+// class PipeIOBufferReader --
+// inline functions definitions
+//
+//////////////////////////////////////////////////////////////////
+TS_INLINE char *
+PipeIOBufferReader::start()
+{
+ throw std::runtime_error("Not applicable for PipeIOBufferReader");
Review Comment:
I’m aware of this and have discussed it with Susan. The ultimate solution
would be to extract a pure abstract class named IOBuffer, making MIOBuffer and
PipeIOBuffer both derived classes of IOBuffer. This would provide a cleaner
separation of concerns and eliminate the need for unnecessary overrides.
However, this would require significant engineering effort, and I may not have
enough resources to invest in this at the moment.
The reason I explicitly throw errors in empty overridden methods is to
prevent developers from incorrectly calling MIOBuffer-specific methods on
inappropriate instances, which could lead to undefined behavior. This ensures
that such issues are caught early rather than silently causing unintended
consequences.
I’m open to discussing alternative approaches if there’s a way to improve
the class design while keeping the effort reasonable.
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