Memory Allocation

The GNU system provides several methods for allocating memory space under explicit program control. They vary in generality and in efficiency.

• The malloc facility allows fully general dynamic allocation. See section Unconstrained Allocation.
• Obstacks are another facility, less general than malloc but more efficient and convenient for stacklike allocation. See section Obstacks.
• The function alloca lets you allocate storage dynamically that will be freed automatically. See section Automatic Storage with Variable Size.

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