Re: inline newNode()
От | Tom Lane |
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Тема | Re: inline newNode() |
Дата | |
Msg-id | 17106.1034137712@sss.pgh.pa.us обсуждение исходный текст |
Ответ на | Re: inline newNode() (Bruce Momjian <pgman@candle.pha.pa.us>) |
Ответы |
Re: inline newNode()
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Список | pgsql-patches |
Bruce Momjian <pgman@candle.pha.pa.us> writes: > Right, palloc shouldn't. I was thinking of having another version of > palloc that _does_ clear out memory, and calling that from a newNode() > macro. We already know palloc is going to call MemoryContextAlloc, so > we could have a pallocC() that calls a new MemoryContextAllocC() that > would call the underlying memory allocation function, then do the loop > like MemSet to clear it. But if the MemSet is inside the called function then it cannot reduce the if-tests to a compile-time decision to invoke the word-zeroing loop. We want the MemSet to be expanded at the newNode call site, where the size of the allocated memory is a compile-time constant. regards, tom lane
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