forked from bartvdbraak/blender
BLI_mempool: Use an 'odd' FREEWORD for big/little endian
This also changes freeword to an intptr_t to ensure not only the first 4 bits of a pointer are tested on 64bit systems.
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@ -57,12 +57,29 @@
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#ifdef __BIG_ENDIAN__
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/* Big Endian */
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# define MAKE_ID(a, b, c, d) ( (int)(a) << 24 | (int)(b) << 16 | (c) << 8 | (d) )
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# define MAKE_ID_8(a, b, c, d, e, f, g, h) \
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((int64_t)(a) << 56 | (int64_t)(b) << 48 | (int64_t)(c) << 40 | (int64_t)(d) << 32 | \
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(int64_t)(e) << 24 | (int64_t)(f) << 16 | (int64_t)(g) << 8 | (h) )
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#else
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/* Little Endian */
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# define MAKE_ID(a, b, c, d) ( (int)(d) << 24 | (int)(c) << 16 | (b) << 8 | (a) )
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# define MAKE_ID_8(a, b, c, d, e, f, g, h) \
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((int64_t)(h) << 56 | (int64_t)(g) << 48 | (int64_t)(f) << 40 | (int64_t)(e) << 32 | \
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(int64_t)(d) << 24 | (int64_t)(c) << 16 | (int64_t)(b) << 8 | (a) )
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#endif
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#define FREEWORD MAKE_ID('f', 'r', 'e', 'e')
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/**
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* Important that this value is an is _not_ aligned with ``sizeof(void *)``.
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* So having a pointer to 2/4/8... aligned memory is enough to ensure the freeword will never be used.
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* To be safe, use a word thats the same in both directions.
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*/
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#define FREEWORD ((sizeof(void *) > sizeof(int32_t)) ? \
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MAKE_ID_8('e', 'e', 'r', 'f', 'f', 'r', 'e', 'e') : \
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MAKE_ID('e', 'f', 'f', 'e'))
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/**
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* The 'used' word just needs to be set to something besides FREEWORD.
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*/
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#define USEDWORD MAKE_ID('u', 's', 'e', 'd')
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/* currently totalloc isnt used */
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@ -87,7 +104,7 @@ static bool mempool_debug_memset = false;
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*/
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typedef struct BLI_freenode {
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struct BLI_freenode *next;
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int freeword; /* used to identify this as a freed node */
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intptr_t freeword; /* used to identify this as a freed node */
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} BLI_freenode;
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/**
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