Le jeudi 20 juin 2013, Nick Coghlan a écrit : > > > Is PyMemMappingAllocator complete enough for your usage at CCP Games? > > Can we go back to calling this the "Arena" allocator? Or at least > "Mapped"? When I see "Mapping" in the context of Python I think of the > container API, not a memory allocation API. > This function is written to be able to use mmap() and VirtualAlloc(). There is no Python function to use directly this allocator yet, but I chose "memory mapping" name because it is very different than the heap and it may be useful for other functions than pymalloc.
If I change the name, it would be called PyObject_SetArenaAllocator() with a PyObjectArenaAllocator structure. I'm not sure that PyMemMappingAllocator API is future-proof, so I'm fine to call it "arena" again. > > I hope that the PEP 445 is flexible enough to allow you to decide > > which functions are hooked and replaced, and which functions will be > > leaved unchanged. That's why I'm not in favor of the "Make > > PyMem_Malloc() reuse PyMem_RawMalloc() by default" alternative. > > It's also why I'm in favour of the "domain" API rather than separate > functions. > > 1. In the initial iteration, just have the three basic domains (raw, > interpreter, objects). Replacing allocators for third party libraries is > the responsibility of embedding applications. > > 2. In a later iteration, add "PyMem_AddDomain" and "PyMem_GetDomains" APIs > so that extension modules can register new domains for wrapped libraries. > Replacing allocators is still the responsibility of embedding applications, > but there's a consistent API to do it. > > (Alternatively, we could do both now) > How would you use an allocator of a new domain? PyMemBlockAllocator structure is not convinient, and if Py_GetAllocator() only once, you may loose a hook installed later. Victor
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