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Invent a new memory context primitive, MemoryContextSetParent.

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This function will be useful for altering the lifespan of a context after
creation (for example, by creating it under a transient context and later
reparenting it to belong to a long-lived context).  It costs almost no new
code, since we can refactor what was there.  Per my proposal of yesterday.
This commit is contained in:
Tom Lane
2011-09-11 16:29:42 -04:00
parent 5f42e5945b
commit b0025bd957
2 changed files with 65 additions and 19 deletions
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src/include/utils/memutils.h
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@ -90,6 +90,8 @@ extern void MemoryContextDelete(MemoryContext context);
extern void MemoryContextResetChildren(MemoryContext context);
extern void MemoryContextDeleteChildren(MemoryContext context);
extern void MemoryContextResetAndDeleteChildren(MemoryContext context);
extern void MemoryContextSetParent(MemoryContext context,
MemoryContext new_parent);
extern Size GetMemoryChunkSpace(void *pointer);
extern MemoryContext GetMemoryChunkContext(void *pointer);
extern bool MemoryContextIsEmpty(MemoryContext context);