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authorRusty Russell <rusty@rustcorp.com.au>2011-08-31 13:57:14 +0930
committerRusty Russell <rusty@rustcorp.com.au>2011-08-31 13:57:14 +0930
commitb88e0c40b777480e101a7524697656d6a03fb563 (patch)
treeeaec73435c2356a4e001d331a2a1aff31b8628a4 /lib/ccan/likely
parentb10ad70f8fd5ee359b4409b373ba93ff050c82d4 (diff)
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ccan: fix likely redefinition warnings with --enable-tdb2
When we do --enable-tdb2, we start clashing with the replace.h version: In file included from ../lib/tdb2/tools/../private.h:25:0, from ../lib/tdb2/tools/tdb2torture.c:60: ../lib/ccan/likely/likely.h:32:0: warning: "likely" redefined ../lib/replace/replace.h:762:0: note: this is the location of the previous definition ../lib/ccan/likely/likely.h:53:0: warning: "unlikely" redefined ../lib/replace/replace.h:765:0: note: this is the location of the previous definition I don't like to #ifndef-protect them in general, since you don't want different parts of the code to silently have different definitions, but it's the simplest fix for now. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'lib/ccan/likely')
-rw-r--r--lib/ccan/likely/likely.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/ccan/likely/likely.h b/lib/ccan/likely/likely.h
index c43d276759..3a9c6d4640 100644
--- a/lib/ccan/likely/likely.h
+++ b/lib/ccan/likely/likely.h
@@ -30,7 +30,9 @@
* return false;
* }
*/
+#ifndef likely
#define likely(cond) __builtin_expect(!!(cond), 1)
+#endif
/**
* unlikely - indicate that a condition is unlikely to be true.
@@ -51,11 +53,17 @@
* fprintf(stderr, "Overflow!");
* }
*/
+#ifndef unlikely
#define unlikely(cond) __builtin_expect(!!(cond), 0)
+#endif
#else
+#ifndef likely
#define likely(cond) (!!(cond))
+#endif
+#ifndef unlikely
#define unlikely(cond) (!!(cond))
#endif
+#endif
#else /* CCAN_LIKELY_DEBUG versions */
#define likely(cond) \
(_likely_trace(!!(cond), 1, stringify(cond), __FILE__, __LINE__))