77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
/* date = June 19th 2023 10:07 pm */
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#ifndef CORE_MEMORY_H
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#define CORE_MEMORY_H
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//- sixten: Common memory functions
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static void Copy(void *Dest, void *Source, umm Count);
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static void Fill(void *Dest, u8 Value, umm Count);
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//- sixten: Memory arena types
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struct platform_memory_block;
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struct memory_arena
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{
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platform_memory_block *CurrentBlock;
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umm MinimumBlockSize;
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s32 TemporaryMemoryCount;
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};
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struct temporary_memory
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{
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memory_arena *Arena;
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platform_memory_block *Block;
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umm Used;
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};
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//- sixten: Arena push flags
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enum arena_push_flag
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{
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ArenaFlag_ClearToZero = 0x1,
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};
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struct arena_push_params
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{
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u32 Flags;
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u32 Alignment;
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};
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inline arena_push_params DefaultArenaParams(void)
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{
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arena_push_params Params = {};
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Params.Flags = ArenaFlag_ClearToZero;
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Params.Alignment = 4;
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return(Params);
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}
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inline arena_push_params NoClear(void)
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{
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arena_push_params Params = DefaultArenaParams();
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Params.Flags &= ~ArenaFlag_ClearToZero;
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return(Params);
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}
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//- sixten: Memory arena functions
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static void Release(memory_arena *Arena);
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#define PushSize(Arena, InitialSize, ...) PushSize_(Arena, InitialSize, __VA_ARGS__)
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#define PushStruct(Arena, type, ...) (type *)PushSize_(Arena, sizeof(type), __VA_ARGS__)
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#define PushArray(Arena, type, Count, ...) (type *)PushSize_(Arena, sizeof(type)*Count, __VA_ARGS__)
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static void *PushSize_(memory_arena *Arena, umm InitialSize, arena_push_params Params = DefaultArenaParams());
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//- sixten: Bootstrapping helpers
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#define BootstrapPushStruct(type, Member) (type *)BootstrapPushSize(sizeof(type), OffsetOf(type, Member))
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static void *BootstrapPushSize(umm Size, umm OffsetToArena);
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//- sixten: Temporary memory functions
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static temporary_memory BeginTemporaryMemory(memory_arena *Arena);
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static void EndTemporaryMemory(temporary_memory Temp);
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#endif //CORE_MEMORY_H
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