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Obstack
In the C programming language, Obstack is a memory-management GNU extension to the C standard library. An "obstack" is a "stack" of "objects" (data items) which is dynamically managed. It implements a region-based memory management scheme.
Obstack code typically provides C macros which take care of memory allocation and management for the user. Basically, obstacks are used as a form of memory management which can be more efficient and less difficult to implement than malloc/free in several situations. For example, say one needs to set up a stack for handling data items whose number grows for a while and then reach a final form; such a stack could be defined in ''obstack.h''.
==Freeing allocated objects==
Once the object is allocated a new chunk of memory in obstack it must be freed after its use.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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