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412f6f5352
* Separate build directory for tests and TESTING define * fixup! Separate build directory for tests and TESTING define * fixup! Separate build directory for tests and TESTING define * fixup! Separate build directory for tests and TESTING define
68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
#ifndef GUARD_ALLOC_H
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#define GUARD_ALLOC_H
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#define HEAP_SIZE 0x1C000
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#define FREE_AND_SET_NULL(ptr) \
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{ \
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Free(ptr); \
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ptr = NULL; \
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}
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#define TRY_FREE_AND_SET_NULL(ptr) if (ptr != NULL) FREE_AND_SET_NULL(ptr)
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#define MALLOC_SYSTEM_ID 0xA3A3
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struct MemBlock
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{
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// Whether this block is currently allocated.
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u16 allocated:1;
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u16 unused_00:4;
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// High 11 bits of location pointer.
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u16 locationHi:11;
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// Magic number used for error checking. Should equal MALLOC_SYSTEM_ID.
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u16 magic;
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// Size of the block (not including this header struct).
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u32 size:18;
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// Low 14 bits of location pointer.
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u32 locationLo:14;
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// Previous block pointer. Equals sHeapStart if this is the first block.
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struct MemBlock *prev;
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// Next block pointer. Equals sHeapStart if this is the last block.
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struct MemBlock *next;
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// Data in the memory block. (Arrays of length 0 are a GNU extension.)
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u8 data[0];
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};
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extern u8 gHeap[];
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#if TESTING || !defined(NDEBUG)
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#define Alloc(size) Alloc_(size, __FILE__ ":" STR(__LINE__))
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#define AllocZeroed(size) AllocZeroed_(size, __FILE__ ":" STR(__LINE__))
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#else
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#define Alloc(size) Alloc_(size, NULL)
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#define AllocZeroed(size) AllocZeroed_(size, NULL)
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#endif
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void *Alloc_(u32 size, const char *location);
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void *AllocZeroed_(u32 size, const char *location);
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void Free(void *pointer);
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void InitHeap(void *pointer, u32 size);
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const struct MemBlock *HeapHead(void);
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const char *MemBlockLocation(const struct MemBlock *block);
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#endif // GUARD_ALLOC_H
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