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Start implementing realloc functions for Arena allocator

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Abdelrahman Said 2024-09-14 13:39:59 +01:00
parent 95c47ec940
commit a0dfe8acd0
4 changed files with 28 additions and 5 deletions
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8
src/core/mem/arena/mem_arena.c
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@ -95,6 +95,14 @@ void *wapp_mem_arena_alloc_aligned(Arena *arena, u64 size, u64 alignment) {
return (void *)output;
}
void *wapp_mem_arena_realloc(Arena *arena, void *ptr, u64 old_size, u64 new_size) {
return NULL;
}
void *wapp_mem_arena_realloc_aligned(Arena *arena, void *ptr, u64 old_size, u64 new_size, u64 alignment) {
return NULL;
}
void wapp_mem_arena_clear(Arena *arena) {
if (!arena) {
return;

2
src/core/mem/arena/mem_arena.h
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@ -47,6 +47,8 @@ bool wapp_mem_arena_init_custom(Arena **arena, u64 base_capacity,
MemAllocFlags flags, bool zero_buffer);
void *wapp_mem_arena_alloc(Arena *arena, u64 size);
void *wapp_mem_arena_alloc_aligned(Arena *arena, u64 size, u64 alignment);
void *wapp_mem_arena_realloc(Arena *arena, void *ptr, u64 old_size, u64 new_size);
void *wapp_mem_arena_realloc_aligned(Arena *arena, void *ptr, u64 old_size, u64 new_size, u64 alignment);
void wapp_mem_arena_clear(Arena *arena);
void wapp_mem_arena_destroy(Arena **arena);

19
src/core/mem/arena/mem_arena_allocator.c
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@ -8,8 +8,10 @@
/***************************************************************************/ //
internal inline void *mem_arena_alloc(u64 size, void *alloc_obj);
internal inline void *mem_arena_alloc_aligned(u64 size, u64 alignment,
void *alloc_obj);
internal inline void *mem_arena_alloc_aligned(u64 size, u64 alignment, void *alloc_obj);
internal inline void *mem_arena_realloc(void *ptr, u64 old_size, u64 new_size, void *alloc_obj);
internal inline void *mem_arena_realloc_aligned(void *ptr, u64 old_size, u64 new_size, u64 alignment,
void *alloc_obj);
/***************************************************************************/ //
////////////////////////////////////////////////////////////////////////////////
@ -29,6 +31,8 @@ Allocator wapp_mem_arena_allocator_init_custom(u64 base_capacity,
allocator.alloc = mem_arena_alloc;
allocator.alloc_aligned = mem_arena_alloc_aligned;
allocator.realloc = mem_arena_realloc;
allocator.realloc_aligned = mem_arena_realloc_aligned;
return allocator;
}
@ -58,3 +62,14 @@ internal inline void *mem_arena_alloc_aligned(u64 size, u64 alignment,
Arena *arena = (Arena *)alloc_obj;
return wapp_mem_arena_alloc_aligned(arena, size, alignment);
}
internal inline void *mem_arena_realloc(void *ptr, u64 old_size, u64 new_size, void *alloc_obj) {
Arena *arena = (Arena *)alloc_obj;
return wapp_mem_arena_realloc(arena, ptr, old_size, new_size);
}
internal inline void *mem_arena_realloc_aligned(void *ptr, u64 old_size, u64 new_size, u64 alignment,
void *alloc_obj) {
Arena *arena = (Arena *)alloc_obj;
return wapp_mem_arena_realloc_aligned(arena, ptr, old_size, new_size, alignment);
}

4
src/core/mem/arena/mem_arena_allocator.h
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@ -46,9 +46,7 @@ extern "C" {
* The `wapp_mem_arena_allocator_init_custom` provides the most control over how
* the Arena is initialised. Wrapper macros are provided for easier use.
*/
Allocator wapp_mem_arena_allocator_init_custom(u64 base_capacity,
MemAllocFlags flags,
bool zero_buffer);
Allocator wapp_mem_arena_allocator_init_custom(u64 base_capacity, MemAllocFlags flags, bool zero_buffer);
void wapp_mem_arena_allocator_clear(Allocator *allocator);
void wapp_mem_arena_allocator_destroy(Allocator *allocator);