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@@ -79,6 +79,11 @@ extern int dmalloc_free(const char *file, const int line, void *pnt,
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*
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* This is a macro. If you need a function pointer to release memory from
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* tor_malloc(), use tor_free_().
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+ *
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+ * Note that this macro takes the address of the pointer it is going to
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+ * free and clear. If that pointer is stored with a nonstandard
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+ * alignment (eg because of a "packed" pragma) it is not correct to use
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+ * tor_free().
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*/
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#ifdef __GNUC__
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#define tor_free(p) STMT_BEGIN \
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