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Add utility macros for arena initialisation

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This commit is contained in:
Abdelrahman Said
2024-06-09 01:46:23 +01:00
parent ccc86342cd
commit cf12144230
3 changed files with 25 additions and 4 deletions
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13
src/mem/arena/mem_arena.c
View File

@@ -17,6 +17,7 @@ struct arena {
u8 *buf;
u8 *offset;
u64 capacity;
bool committed;
};
// PUBLIC API
@@ -38,7 +39,7 @@ bool wapp_mem_arena_init(Arena **arena, u64 base_capacity, MemAllocFlags flags,
: ARENA_MINIMUM_CAPACITY;
arena_ptr->buf = (u8 *)wapp_mem_util_alloc(
arena_capacity, WAPP_MEM_ACCESS_READ_WRITE, flags,
NULL, arena_capacity, WAPP_MEM_ACCESS_READ_WRITE, flags,
zero_buffer ? WAPP_MEM_INIT_INITIALISED : WAPP_MEM_INIT_UNINITIALISED);
if (!(arena_ptr->buf)) {
@@ -48,6 +49,8 @@ bool wapp_mem_arena_init(Arena **arena, u64 base_capacity, MemAllocFlags flags,
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;
}
@@ -70,6 +73,14 @@ void *wapp_mem_arena_alloc_aligned(Arena *arena, u64 size, u64 alignment) {
arena->offset = output + size;
#ifdef WAPP_PLATFORM_WINDOWS
if (!(arena->committed)) {
output = (u8 *)wapp_mem_util_alloc(output, size, WAPP_MEM_ACCESS_READ_WRITE,
WAPP_MEM_ALLOC_COMMIT,
WAPP_MEM_INIT_UNINITIALISED);
}
#endif // ifdef WAPP_PLATFORM_WINDOWS
memset(output, 0, size);
return (void *)output;

12
src/mem/arena/mem_arena.h
View File

@@ -11,6 +11,18 @@ extern "C" {
typedef struct arena Arena;
#define wapp_mem_arena_init_default(arena_dptr, base_capacity) \
(wapp_mem_arena_init(arena_dptr, base_capacity, WAPP_MEM_ALLOC_RESERVE, \
false))
#define wapp_mem_arena_init_commit(arena_dptr, base_capacity) \
(wapp_mem_arena_init(arena_dptr, base_capacity, \
WAPP_MEM_ALLOC_RESERVE | WAPP_MEM_ALLOC_COMMIT, false))
#define wapp_mem_arena_init_zero(arena_dptr, base_capacity) \
(wapp_mem_arena_init(arena_dptr, base_capacity, WAPP_MEM_ALLOC_RESERVE, true))
#define wapp_mem_arena_init_commit_and_zero(arena_dptr, base_capacity) \
(wapp_mem_arena_init(arena_dptr, base_capacity, \
WAPP_MEM_ALLOC_RESERVE | WAPP_MEM_ALLOC_COMMIT, true))
bool wapp_mem_arena_init(Arena **arena, u64 base_capacity, MemAllocFlags flags,
bool zero_buffer);
void *wapp_mem_arena_alloc(Arena *arena, u64 size);