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Eliminate 'checking unsigned variable < 0' cppcheck warning in gc_inline

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* include/gc_inline.h (GC_FAST_MALLOC_GRANS): Replace
(word)my_entry<=num_direct with (signed_word)my_entry-num_direct<=0
to avoid "checking unsigned var < 0" warning if num_direct==0
(no overflow is expected in (signed_word)my_entry-num_direct as it is
guaranteed that (word)my_entry<=num_direct+GC_TINY_FREELISTS+1).
This commit is contained in:
Ivan Maidanski
2017-03-01 01:25:34 +03:00
parent 7b5b5bc11f
commit 64bed186fc
1 changed files with 3 additions and 1 deletions
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include/gc_inline.h
+3 -1
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@@ -121,7 +121,9 @@ GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL
break; \
} \
/* Entry contains counter or NULL */ \
if ((GC_word)my_entry <= (num_direct) && my_entry != 0) { \
if ((GC_signed_word)my_entry - (GC_signed_word)(num_direct) <= 0 \
/* (GC_word)my_entry <= (num_direct) */ \
&& my_entry != NULL) { \
/* Small counter value, not NULL */ \
*my_fl = (char *)my_entry + (granules) + 1; \
result = (default_expr); \