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38 lines
1.1 KiB
38 lines
1.1 KiB
#ifndef __MEMORY_H__
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#define __MEMORY_H__
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#define SCRATCHLEN 1024
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extern u_char* const scratchpad; // Starting address of scratchpad memory, i.e. the 1kB of data cache usable as fast RAM
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#define PRIMBUFLEN 65536*2 // TODO: reduce this to what's needed for a typical scene
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extern char *nextprim;
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extern char *primbuf_bounds;
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/**
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* @brief Allocate a single primitive in the primitive buffer.
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*
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* @param size Size of the primitive struct to allocate.
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* @return Pointer to the allocated struct in memory.
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*/
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INLINE void *mem_prim(size_t size)
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{
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void *prim = nextprim;
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nextprim += size;
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return prim;
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}
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/**
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* @brief Check if it's safe to allocate the given number of primitives of the given size.
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*
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* @param size The size of each primitive to allocate.
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* @param count The number of primitives to allocate.
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* @return Whether the number of primitives can be allocated without exceeding the primitive buffer bounds.
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*/
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INLINE char mem_checkprim(size_t size, u_short count)
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{
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return nextprim + size * count < primbuf_bounds;
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}
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void mem_prim_reset(int db);
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#endif // __MEMORY_H__
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