https://github.com/tsoding/arena
Arena Allocator implementation in pure C as an stb-style single-file library.
https://github.com/tsoding/arena
Last synced: 8 months ago
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Arena Allocator implementation in pure C as an stb-style single-file library.
- Host: GitHub
- URL: https://github.com/tsoding/arena
- Owner: tsoding
- License: mit
- Created: 2022-08-29T02:46:36.000Z (over 3 years ago)
- Default Branch: master
- Last Pushed: 2025-04-22T09:02:49.000Z (8 months ago)
- Last Synced: 2025-04-29T12:14:49.516Z (8 months ago)
- Language: C
- Size: 111 KB
- Stars: 512
- Watchers: 8
- Forks: 25
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Arena Allocator
[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).
*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)*
## Quick Start
> The truly reusable code is the one that you can simply copy-paste.
The library itself does not require any special building. You can simple copy-paste [./arena.h](./arena.h) to your project and `#include` it.
```c
#define ARENA_IMPLEMENTATION
#include "arena.h"
static Arena default_arena = {0};
static Arena temporary_arena = {0};
static Arena *context_arena = &default_arena;
void *context_alloc(size_t size)
{
assert(context_arena);
return arena_alloc(context_arena, size);
}
int main(void)
{
// Allocate stuff in default_arena
context_alloc(64);
context_alloc(128);
context_alloc(256);
context_alloc(512);
// Allocate stuff in temporary_arena;
context_arena = &temporary_arena;
context_alloc(64);
context_alloc(128);
context_alloc(256);
context_alloc(512);
// Deallocate everything at once
arena_free(&default_arena);
arena_free(&temporary_arena);
return 0;
}
```