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-rw-r--r--lib/util/memory.h25
1 files changed, 25 insertions, 0 deletions
diff --git a/lib/util/memory.h b/lib/util/memory.h
index de01492aa2..cfc13ab836 100644
--- a/lib/util/memory.h
+++ b/lib/util/memory.h
@@ -88,6 +88,31 @@
#define PTR_DIFF(p1,p2) ((ptrdiff_t)(((const char *)(p1)) - (const char *)(p2)))
#endif
+/**
+ this is a warning hack. The idea is to use this everywhere that we
+ get the "discarding const" warning from gcc. That doesn't actually
+ fix the problem of course, but it means that when we do get to
+ cleaning them up we can do it by searching the code for
+ discard_const.
+
+ It also means that other error types aren't as swamped by the noise
+ of hundreds of const warnings, so we are more likely to notice when
+ we get new errors.
+ Please only add more uses of this macro when you find it
+ _really_ hard to fix const warnings. Our aim is to eventually use
+ this function in only a very few places.
+
+ Also, please call this via the discard_const_p() macro interface, as that
+ makes the return type safe.
+*/
+#ifndef discard_const
+#define discard_const(ptr) ((void *)((uintptr_t)(ptr)))
+#endif
+
+/** Type-safe version of discard_const */
+#ifndef discard_const_p
+#define discard_const_p(type, ptr) ((type *)discard_const(ptr))
+#endif
#endif /* _SAMBA_MEMORY_H_ */