Added cds_likely/cds_unlikely macro

diff --git a/cds/compiler/clang/defs.h b/cds/compiler/clang/defs.h
index 4a84e3a00c97aec28020e7f2e31e98dc9790b661..7d271354c86a0cc94f0e4a641878ac742fca2682 100644 (file)
--- a/cds/compiler/clang/defs.h
+++ b/cds/compiler/clang/defs.h
@@ -122,6 +122,11 @@
 #define CDS_DATA_ALIGNMENT(n)   __attribute__ ((aligned (n)))
 
 
+// likely/unlikely
+
+#define cds_likely( expr )   __builtin_expect( !!( expr ), 1 )
+#define cds_unlikely( expr ) __builtin_expect( !!( expr ), 0 )
+
 #include <cds/compiler/gcc/compiler_barriers.h>
 
 #endif // #ifndef CDSLIB_COMPILER_GCC_DEFS_H

diff --git a/cds/compiler/defs.h b/cds/compiler/defs.h
index 0e663c8f7da7493834e964dbf6b94c05cacd934f..3470643593771fcc7ef322369b3eee3e188ef877 100644 (file)
--- a/cds/compiler/defs.h
+++ b/cds/compiler/defs.h
@@ -65,6 +65,11 @@
 #   define CDS_EXPORT_API
 #endif
 
+#ifndef cds_likely
+#   define cds_likely( expr )   expr
+#   define cds_unlikely( expr ) expr
+#endif
+
 // Features
 #include <cds/compiler/feature_tsan.h>
 

diff --git a/cds/compiler/gcc/defs.h b/cds/compiler/gcc/defs.h
index e3c91e762626ef1d816a924d613f2bd36367bce7..a6028cc6296e77654f66c9cb911bc56dfcd44923 100644 (file)
--- a/cds/compiler/gcc/defs.h
+++ b/cds/compiler/gcc/defs.h
@@ -97,6 +97,11 @@
 #   define CDS_DEPRECATED( reason ) __attribute__((deprecated( reason )))
 #endif
 
+// likely/unlikely
+
+#define cds_likely( expr )   __builtin_expect( !!( expr ), 1 )
+#define cds_unlikely( expr ) __builtin_expect( !!( expr ), 0 )
+
 #include <cds/compiler/gcc/compiler_barriers.h>
 
 #endif // #ifndef CDSLIB_COMPILER_GCC_DEFS_H