47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
#ifndef ARENA_H
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#define ARENA_H
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#define ARENA_INITIAL_COMMIT_SIZE sizeof(struct Arena)
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#define ARENA_DEFAULT_ALIGNMENT 0
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#ifndef ARENA_DEFAULT_RESERVE_SIZE
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# define ARENA_DEFAULT_RESERVE_SIZE KB(4)
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#endif // ARENA_DEFAULT_RESERVE_SIZE
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typedef struct Arena Arena;
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struct Arena {
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struct Arena *current;
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struct Arena *prev;
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u64 *backing_buffer;
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u64 base_pos;
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u64 offset;
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u64 size;
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b8 growable;
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};
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//= rhjr: arenas
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internal Arena * arena_initialize(u64 size, b8 growable);
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internal Arena * arena_initialize_default();
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internal void * arena_allocate(Arena *arena, u64 size);
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#define arena_push_array(arena, type, count) \
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(type*) arena_allocate((arena), sizeof(type) * (count))
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#define arena_push(arena, type) \
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(type*) arena_allocate((arena), sizeof(type))
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internal void arena_release(Arena *arena);
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//= rhjr: memory helpers
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#define memory_align(x, b) ((b != 0) ? (((x) + (b) - 1) & (~(b - 1))) : (x))
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#define memory_zero(s,z) memset((s), 0, (z))
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#define memory_zero_struct(s) memory_zero((s), sizeof(*(s)))
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#define memory_copy(dst, src, length) memmove((dst), (src), (length))
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#endif // ARENA_H
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