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Reviewed-on: #9
This commit was merged in pull request #9.
This commit is contained in:
Abdelrahman Said
2025-12-29 22:46:52 +00:00
parent aa6ef1ec2c
commit ad2de98093
60 changed files with 3772 additions and 3772 deletions
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154
src/os/allocators/arena/mem_arena.c
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@@ -18,129 +18,129 @@
#define ARENA_MINIMUM_CAPACITY KiB(16) // Allocate minimum of 4 pages
struct arena {
u8 *buf;
u8 *offset;
u64 capacity;
b8 committed;
u8 *buf;
u8 *offset;
u64 capacity;
b8 committed;
#ifdef WAPP_PLATFORM_WINDOWS
wapp_misc_utils_padding_size(sizeof(u8 *) * 2 + sizeof(u64) + sizeof(b8));
wapp_misc_utils_padding_size(sizeof(u8 *) * 2 + sizeof(u64) + sizeof(b8));
#endif // ifdef WAPP_PLATFORM_WINDOWS
};
b8 wapp_mem_arena_init_custom(Arena **arena, u64 base_capacity, MemAllocFlags flags, b8 zero_buffer) {
if (!arena || *arena || base_capacity == 0) {
return false;
}
if (!arena || *arena || base_capacity == 0) {
return false;
}
*arena = (Arena *)calloc(1, sizeof(Arena));
Arena *arena_ptr = *arena;
if (!arena_ptr) {
return false;
}
*arena = (Arena *)calloc(1, sizeof(Arena));
Arena *arena_ptr = *arena;
if (!arena_ptr) {
return false;
}
u64 arena_capacity = wapp_misc_utils_u64_round_up_pow2(
base_capacity >= ARENA_MINIMUM_CAPACITY ?
base_capacity :
ARENA_MINIMUM_CAPACITY
);
u64 arena_capacity = wapp_misc_utils_u64_round_up_pow2(
base_capacity >= ARENA_MINIMUM_CAPACITY ?
base_capacity :
ARENA_MINIMUM_CAPACITY
);
arena_ptr->buf = (u8 *)wapp_mem_util_alloc(NULL, arena_capacity, WAPP_MEM_ACCESS_READ_WRITE, flags,
zero_buffer ? WAPP_MEM_INIT_INITIALISED : WAPP_MEM_INIT_UNINITIALISED);
arena_ptr->buf = (u8 *)wapp_mem_util_alloc(NULL, arena_capacity, WAPP_MEM_ACCESS_READ_WRITE, flags,
zero_buffer ? WAPP_MEM_INIT_INITIALISED : WAPP_MEM_INIT_UNINITIALISED);
if (!(arena_ptr->buf)) {
wapp_mem_arena_destroy(arena);
return false;
}
if (!(arena_ptr->buf)) {
wapp_mem_arena_destroy(arena);
return false;
}
arena_ptr->capacity = arena_capacity;
arena_ptr->offset = arena_ptr->buf;
arena_ptr->committed = (flags & WAPP_MEM_ALLOC_COMMIT) == WAPP_MEM_ALLOC_COMMIT;
arena_ptr->capacity = arena_capacity;
arena_ptr->offset = arena_ptr->buf;
arena_ptr->committed = (flags & WAPP_MEM_ALLOC_COMMIT) == WAPP_MEM_ALLOC_COMMIT;
return true;
return true;
}
void *wapp_mem_arena_alloc(Arena *arena, u64 size) {
return wapp_mem_arena_alloc_aligned(arena, size, DEFAULT_ALIGNMENT);
return wapp_mem_arena_alloc_aligned(arena, size, DEFAULT_ALIGNMENT);
}
void *wapp_mem_arena_alloc_aligned(Arena *arena, u64 size, u64 alignment) {
wapp_debug_assert(arena != NULL, "`arena` should not be NULL");
wapp_debug_assert(arena != NULL, "`arena` should not be NULL");
u8 *alloc_start = arena->offset;
u8 *alloc_start = arena->offset;
u8 *output = wapp_mem_util_align_forward((void *)alloc_start, alignment);
if (output + size >= arena->buf + arena->capacity) {
return NULL;
}
u8 *output = wapp_mem_util_align_forward((void *)alloc_start, alignment);
if (output + size >= arena->buf + arena->capacity) {
return NULL;
}
arena->offset = output + size;
arena->offset = output + size;
#ifdef WAPP_PLATFORM_WINDOWS
if (!(arena->committed)) {
wapp_mem_util_alloc(alloc_start, (uptr)(arena->offset) - (uptr)(alloc_start),
WAPP_MEM_ACCESS_READ_WRITE, WAPP_MEM_ALLOC_COMMIT,
WAPP_MEM_INIT_UNINITIALISED);
}
if (!(arena->committed)) {
wapp_mem_util_alloc(alloc_start, (uptr)(arena->offset) - (uptr)(alloc_start),
WAPP_MEM_ACCESS_READ_WRITE, WAPP_MEM_ALLOC_COMMIT,
WAPP_MEM_INIT_UNINITIALISED);
}
#endif // ifdef WAPP_PLATFORM_WINDOWS
memset(output, 0, size);
memset(output, 0, size);
return (void *)output;
return (void *)output;
}
void *wapp_mem_arena_realloc(Arena *arena, void *ptr, u64 old_size, u64 new_size) {
if ((u8*)ptr < arena->buf || (u8*)ptr > arena->offset ||
arena->offset + new_size >= arena->buf + arena->capacity) {
return NULL;
}
if ((u8*)ptr < arena->buf || (u8*)ptr > arena->offset ||
arena->offset + new_size >= arena->buf + arena->capacity) {
return NULL;
}
void *new_ptr = wapp_mem_arena_alloc(arena, new_size);
if (!new_ptr) {
return NULL;
}
void *new_ptr = wapp_mem_arena_alloc(arena, new_size);
if (!new_ptr) {
return NULL;
}
u64 copy_size = new_size <= old_size ? new_size : old_size;
memcpy(new_ptr, ptr, copy_size);
u64 copy_size = new_size <= old_size ? new_size : old_size;
memcpy(new_ptr, ptr, copy_size);
return new_ptr;
return new_ptr;
}
void *wapp_mem_arena_realloc_aligned(Arena *arena, void *ptr, u64 old_size, u64 new_size, u64 alignment) {
if ((u8*)ptr < arena->buf || (u8*)ptr > arena->offset ||
arena->offset + new_size >= arena->buf + arena->capacity) {
return NULL;
}
if ((u8*)ptr < arena->buf || (u8*)ptr > arena->offset ||
arena->offset + new_size >= arena->buf + arena->capacity) {
return NULL;
}
void *new_ptr = wapp_mem_arena_alloc_aligned(arena, new_size, alignment);
if (!new_ptr) {
return NULL;
}
void *new_ptr = wapp_mem_arena_alloc_aligned(arena, new_size, alignment);
if (!new_ptr) {
return NULL;
}
u64 copy_size = new_size <= old_size ? new_size : old_size;
memcpy(new_ptr, ptr, copy_size);
u64 copy_size = new_size <= old_size ? new_size : old_size;
memcpy(new_ptr, ptr, copy_size);
return new_ptr;
return new_ptr;
}
void wapp_mem_arena_clear(Arena *arena) {
wapp_debug_assert(arena != NULL, "`arena` should not be NULL");
wapp_debug_assert(arena != NULL, "`arena` should not be NULL");
memset(arena->buf, 0, arena->offset - arena->buf);
arena->offset = arena->buf;
memset(arena->buf, 0, arena->offset - arena->buf);
arena->offset = arena->buf;
}
void wapp_mem_arena_destroy(Arena **arena) {
wapp_debug_assert(arena != NULL && (*arena) != NULL, "`arena` double pointer is not valid");
wapp_debug_assert(arena != NULL && (*arena) != NULL, "`arena` double pointer is not valid");
Arena *arena_ptr = *arena;
if (arena_ptr->buf) {
wapp_mem_util_free(arena_ptr->buf, arena_ptr->capacity);
}
Arena *arena_ptr = *arena;
if (arena_ptr->buf) {
wapp_mem_util_free(arena_ptr->buf, arena_ptr->capacity);
}
arena_ptr->buf = arena_ptr->offset = NULL;
arena_ptr->capacity = 0;
arena_ptr->buf = arena_ptr->offset = NULL;
arena_ptr->capacity = 0;
free(*arena);
*arena = NULL;
free(*arena);
*arena = NULL;
}