48 lines
1.3 KiB
Markdown
48 lines
1.3 KiB
Markdown
# Arena Allocator
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[Arena Allocator](https://en.wikipedia.org/wiki/Region-based_memory_management) implementation in pure C as an [stb-style single-file library](https://github.com/nothings/stb).
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*I just caught myself implementing this over and over again in my projects, so I decided to turn it into a copy-pastable library similar to [sv](http://github.com/tsoding/sv)*
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## Quick Start
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> The truly reusable code is the one that you can simply copy-paste.
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The library itself does not require any special building. You can simple copy-paste [./arena.h](./arena.h) to your project and `#include` it.
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```c
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#define ARENA_IMPLEMENTATION
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#include "arena.h"
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static Arena default_arena = {0};
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static Arena temporary_arena = {0};
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static Arena *context_arena = &default_arena;
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void *context_alloc(size_t size)
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{
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assert(context_arena);
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return arena_alloc(context_arena, size);
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}
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int main(void)
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{
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// Allocate stuff in default_arena
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context_alloc(64);
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context_alloc(128);
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context_alloc(256);
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context_alloc(512);
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// Allocate stuff in temporary_arena;
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context_arena = &temporary_arena;
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context_alloc(64);
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context_alloc(128);
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context_alloc(256);
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context_alloc(512);
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// Deallocate everything at once
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arena_free(&default_arena);
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arena_free(&temporary_arena);
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return 0;
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}
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```
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