1 files changed, 47 insertions, 0 deletions
diff --git a/src/include/cctk_Reduction.h b/src/include/cctk_Reduction.h
new file mode 100644
index 00000000..10a37fc5
--- /dev/null
+++ b/src/include/cctk_Reduction.h
@@ -0,0 +1,47 @@
+ /*@@
+   @header    cctk_Reduction.h
+   @date      
+   @author    Gabrielle Allen
+   @desc 
+   Header file for using reduction operators
+   @enddesc 
+ @@*/
+
+/* $Id$ */
+
+
+#ifndef _REDUCTION_H_
+#define _REDUCTION_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define REGISTER_ARGLIST  \
+	  cGH *,  \
+          int,    \
+          int,    \
+          int,    \
+          void *, \
+          int,    \
+          int *    
+
+int CCTK_Reduce(cGH *GH,
+		int proc,
+		int operation_handle,
+		int num_out_vals,
+		int type_out_vals,
+		void *out_vals,
+		int num_in_fields, ...);
+
+int CCTK_ReductionHandle(const char *reduction);
+
+int CCTK_RegisterReductionOperator(void (*function)(REGISTER_ARGLIST),
+				   const char *name);
+
+
+#ifdef __cplusplus
+	   }
+#endif
+
+#endif