From ba5c0a4579ece5d53c009a14d00e683e70b982f4 Mon Sep 17 00:00:00 2001 From: Aryadev Chavali Date: Fri, 9 May 2025 18:29:52 +0100 Subject: Initial implementation --- memory.h | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 memory.h (limited to 'memory.h') diff --git a/memory.h b/memory.h new file mode 100644 index 0000000..bbd4d45 --- /dev/null +++ b/memory.h @@ -0,0 +1,66 @@ +/* Copyright (C) 2025 Aryadev Chavali + + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU General Public License Version 2 for + * details. + + * You may distribute and modify this code under the terms of the GNU General + * Public License Version 2, which you should have received a copy of along with + * this program. If not, please go to . + + * Created: 2025-04-05 + * Description: Memory management structures + */ + +#ifndef MEMORY_H +#define MEMORY_H + +#include "./base.h" +#include + +#define PAGE_DEFAULT_SIZE 1024 +#define MEMORY_ALIGNMENT 8 + +typedef struct Page +{ + struct Page *next; + u64 size, capacity; + u8 data[]; +} page_t; + +page_t *page_create(u64 size); +void page_resize(page_t **page, u64 newsize); +// Append - fail (by returning <0) if not enough space. +i64 page_append(page_t *page, void *data, u64 size); +// Append - will resize if necessary +u64 page_rappend(page_t **page, void *data, u64 size); + +typedef struct Aren +{ + page_t *start, *end; +} arena_t; + +void *arena_alloc(arena_t *arena, u64 size); +void *arena_realloc(arena_t *arena, void *ptr, u64 oldsize, u64 newsize); +void *arena_copy(arena_t *arena, void *ptr, u64 size); +void arena_attach(arena_t *arena, page_t *page); +void arena_reset(arena_t *arena); +void arena_cleanup(arena_t *arena); + +typedef struct Context +{ + arena_t memory, read, scratch; +} context_t; + +void *context_alloc(context_t *context, u64 size); +void *context_salloc(context_t *context, u64 size); +page_t *context_get_read_page(context_t *ctx); +void context_reset_read(context_t *context); +void context_reset_scratch(context_t *context); + +void context_reset(context_t *context); +void context_cleanup(context_t *context); +void context_report(context_t *context); + +#endif -- cgit v1.2.3-13-gbd6f