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Rework Arena into chain of MemoryBlock

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This commit is contained in:
Nils O. Selåsdal
2026-06-07 21:05:51 +02:00
parent 4971459cbf
commit d2482d91a7
5 changed files with 151 additions and 135 deletions
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src/main.c
+37 -34
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@@ -5,76 +5,79 @@
void arena_dump(const Arena *arena)
{
arena = arena->current;
MemoryBlock *block = arena->current;
puts("@@@@@@@@@@");
while (arena) {
while (block) {
puts("-----Arena-----");
printf("base: %p\n", arena->base);
printf("size: %u\n", arena->size);
printf("pos: %u\n", arena->pos);
printf("base_pos: %u\n", arena->base_pos);
printf("prev: %p\n", arena->prev);
printf("base: %p\n", block->base);
printf("size: %u\n", block->size);
printf("pos: %u\n", block->pos);
printf("base_pos: %u\n", block->base_pos);
printf("prev: %p\n", block->prev);
puts("-----Arena end-");
arena = arena->prev;
block = block->prev;
}
}
static void arena_test_1(void)
{
ArenaParams arena_params = {};
arena_params.size = 1024+ARENA_HEADER_SZ;
Arena *arena = arena_alloc(&arena_params);
arena_dump(arena);
void *ptr = arena_push(arena, 512, 1);
arena_params.size = 1024+MemoryBlock_Header_Size;
Arena arena;
arena_init(&arena, &arena_params);
arena_dump(&arena);
void *ptr = arena_push(&arena, 512, 1);
MemoryZero(ptr, 512);
printf("Allocated ptr %p\n", ptr);
arena_dump(arena);
ptr = arena_push(arena, 512, 1);
arena_dump(&arena);
ptr = arena_push(&arena, 512, 1);
MemoryZero(ptr, 512);
printf("Allocated ptr %p\n", ptr);
arena_dump(arena);
arena_dump(&arena);
ptr = arena_push(arena, 1, 1);
ptr = arena_push(&arena, 1, 1);
MemoryZero(ptr, 1);
printf("Allocated ptr %p\n", ptr);
arena_dump(arena);
arena_free(arena);
arena_dump(&arena);
arena_free(&arena);
}
static void arena_test_2(void)
{
ArenaParams arena_params = {};
arena_params.size = 1024+ARENA_HEADER_SZ;
Arena *arena = arena_alloc(&arena_params);
arena_params.size = 1024+MemoryBlock_Header_Size;
Arena arena;
arena_init(&arena, &arena_params);
void *ptr;
ptr = arena_push(arena, 1024, 8);
ptr = arena_push(&arena, 1024, 8);
MemoryZero(ptr, 1024);
printf("Allocated ptr %p\n", ptr);
arena_dump(arena);
ArenaCheckPoint checkpoint = arena_temp_begin(arena);
ptr = arena_push(arena, 4096, 8);
arena_dump(&arena);
ArenaCheckPoint checkpoint = arena_temp_begin(&arena);
ptr = arena_push(&arena, 4096, 8);
MemoryZero(ptr, 4096);
ptr = arena_push(arena, 4096, 8);
ptr = arena_push(&arena, 4096, 8);
MemoryZero(ptr, 4096);
ArenaCheckPoint checkpoint2 = arena_temp_begin(arena);
ptr = arena_push(arena, 64, 8);
ArenaCheckPoint checkpoint2 = arena_temp_begin(&arena);
ptr = arena_push(&arena, 64, 8);
MemoryZero(ptr, 64);
arena_temp_end(&checkpoint2);
arena_temp_end(&checkpoint);
arena_pop_to(arena, 1088);
arena_dump(arena);
ptr = arena_push(arena, 1, 1);
arena_pop_to(&arena, 1088);
arena_dump(&arena);
ptr = arena_push(&arena, 1, 1);
((U8*)ptr)[0] = 0x37;
ptr = arena_push(arena, 1, 1);
ptr = arena_push(&arena, 1, 1);
((U8*)ptr)[0] = 0x73;
arena_pop_to(arena, 1089);
arena_dump(arena);
arena_pop_to(&arena, 1089);
arena_dump(&arena);
arena_pop_to(&arena, 0);
arena_free(arena);
arena_free(&arena);
}
int main(int argc, char *argv[])