92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
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#if !defined(LD_CORE_ARENA_H_)
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#define LD_CORE_ARENA_H_
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#define AlignUp(x, a) (((x) + ~((a) - 1)) & ~((a) - 1))
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#define AlignDown(x, a) (((x)) & ~((a) - 1))
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#define KB(x) ((U64) (x) << 10)
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#define MB(x) ((U64) (x) << 20)
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#define GB(x) ((U64) (x) << 30)
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#if !defined(M_ARENA_CHAIN_RESERVE)
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#define M_ARENA_CHAIN_RESERVE MB(4)
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#endif
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function void *M_ZeroSize(void *base, U64 size);
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function void *M_CopySize(void *dst, void *src, U64 size);
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typedef U32 M_ArenaFlags;
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enum {
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// Arena is fixed size, so will not chain
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M_ARENA_FIXED_SIZE = (1 << 0),
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// Don't clear allocation
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M_ARENA_NO_ZERO = (1 << 1)
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};
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typedef union M_Arena M_Arena;
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union M_Arena {
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struct {
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M_Arena *current;
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M_Arena *prev;
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U64 base;
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U64 limit;
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U64 offset;
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U64 committed;
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U64 increment;
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M_ArenaFlags flags;
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};
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U8 __pad[64];
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};
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typedef struct M_ArenaOpts M_ArenaOpts;
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struct M_ArenaOpts {
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U64 initial;
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U64 increment;
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M_ArenaFlags flags;
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};
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typedef struct M_ArenaPushOpts M_ArenaPushOpts;
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struct M_ArenaPushOpts {
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U64 count;
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U64 align;
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M_ArenaFlags flags;
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};
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function M_Arena *_M_ArenaAlloc(U64 limit, M_ArenaOpts *opts);
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function void *_M_ArenaPush(M_Arena *arena, U64 esize, M_ArenaPushOpts *opts);
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function void *_M_ArenaPushCopy(M_Arena *arena, void *src, U64 esize, M_ArenaPushOpts *opts);
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#define M_ArenaAlloc(limit, ...) _M_ArenaAlloc(limit, &(M_ArenaOpts) { .initial = MB(1), .increment = KB(64), ##__VA_ARGS__ })
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#define M_ArenaPush(arena, T, ...) (T *) _M_ArenaPush(arena, sizeof(T), &(M_ArenaOpts) { .count = 1, .align = Alignof(T), ##__VA_ARGS__ })
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#define M_ArenaPushCopy(arena, T, src, ...) (T *) _M_ArenaPush(arena, src, sizeof(T), &(M_ArenaOpts) { .count = 1, .align = Alignof(T), ##__VA_ARGS__ })
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function void M_ArenaReset(M_Arena *arena);
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function void M_ArenaRelease(M_Arena *arena);
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function U64 M_ArenaOffset(M_Arena *arena);
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function void M_ArenaPop(M_Arena *arena, U64 offset);
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function void M_ArenaPopSize(M_Arena *arena, U64 size);
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// Temporary memory
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typedef struct M_Temp M_Temp;
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struct M_Temp {
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M_Arena *arena;
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U64 offset;
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};
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function M_Temp M_TempAcquire(U64 count, M_Arena **conflicts);
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function void M_TempRelease(M_Temp temp);
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#define M_TempScope(n, c) for (M_Temp temp = M_TempAcquire(n, c); temp.arena != 0; M_TempRelease(temp), temp.arena = 0)
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#endif // LD_CORE_ARENA_H_
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