From 421300c27123ca647772dc6d9bd0cabf7f5f9c99 Mon Sep 17 00:00:00 2001 From: Martin Kagamino Lehoux Date: Wed, 23 Jul 2025 19:39:13 +0200 Subject: refactor: src & pragma once --- src/memory.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 src/memory.c (limited to 'src/memory.c') diff --git a/src/memory.c b/src/memory.c new file mode 100644 index 0000000..63acb39 --- /dev/null +++ b/src/memory.c @@ -0,0 +1,30 @@ +#include +#include +#include +#include + +#include "../include/memory.h" +#include "../include/types.h" + +Arena Arena_new(size cap) { + Arena a = {0}; + a.cap = cap; + a.beg = malloc(cap); + a.end = a.beg ? a.beg + cap : 0; + return a; +} + +// Magic to allow optimisation __attribute((malloc, alloc_size(2, 4), +// alloc_align(3))) +void *alloc(Arena *a, size count, size tsize, size align) { + size padding = -(uptr)a->beg & (align - 1); + byte *beg = a->beg + padding; + size alloc_size = count * tsize; + assert(beg + alloc_size < a->end); + a->beg = beg + alloc_size; + return memset(beg, 0, count * tsize); +} + +void Arena_reset(Arena *a) { a->beg = a->end - a->cap; } + +size Arena_get_used(Arena a) { return a.cap - (a.end - a.beg); } -- cgit v1.3