67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/* Copyright (C) 2025 Aryadev Chavali
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License Version 2 for
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* details.
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* You may distribute and modify this code under the terms of the GNU General
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* Public License Version 2, which you should have received a copy of along with
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* this program. If not, please go to <https://www.gnu.org/licenses/>.
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* Created: 2025-04-05
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* Description: Memory management structures
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*/
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#ifndef MEMORY_H
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#define MEMORY_H
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#include "./base.h"
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#include <stdio.h>
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#define PAGE_DEFAULT_SIZE 1024
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#define MEMORY_ALIGNMENT 8
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typedef struct Page
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{
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struct Page *next;
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u64 size, capacity;
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u8 data[];
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} page_t;
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page_t *page_create(u64 size);
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void page_resize(page_t **page, u64 newsize);
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// Append - fail (by returning <0) if not enough space.
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i64 page_append(page_t *page, void *data, u64 size);
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// Append - will resize if necessary
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u64 page_rappend(page_t **page, void *data, u64 size);
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typedef struct Aren
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{
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page_t *start, *end;
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} arena_t;
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void *arena_alloc(arena_t *arena, u64 size);
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void *arena_realloc(arena_t *arena, void *ptr, u64 oldsize, u64 newsize);
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void *arena_copy(arena_t *arena, void *ptr, u64 size);
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void arena_attach(arena_t *arena, page_t *page);
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void arena_reset(arena_t *arena);
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void arena_cleanup(arena_t *arena);
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typedef struct Context
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{
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arena_t memory, read, scratch;
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} context_t;
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void *context_alloc(context_t *context, u64 size);
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void *context_salloc(context_t *context, u64 size);
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page_t *context_get_read_page(context_t *ctx);
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void context_reset_read(context_t *context);
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void context_reset_scratch(context_t *context);
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void context_reset(context_t *context);
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void context_cleanup(context_t *context);
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void context_report(context_t *context);
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#endif
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