add more data types

include/rabit.h

@@ -51,7 +51,7 @@ struct Sum;
 struct BitOR;
 }  // namespace op
 /*!
- * \brief intialize the rabit module, call this once function before using anything
+ * \brief intialize the rabit module, call this once before using anything
  * \param argc number of arguments in argv
  * \param argv the array of input arguments
  */

include/rabit/engine.h

@@ -146,14 +146,21 @@ IEngine *GetEngine(void);
 namespace mpi {
 /*!\brief enum of all operators */
 enum OpType {
-  kMax, kMin, kSum, kBitwiseOR
+  kMax = 0,
+  kMin = 1,
+  kSum = 2,
+  kBitwiseOR = 3
 };
 /*!\brief enum of supported data types */
 enum DataType {
-  kInt,
-  kUInt,
-  kDouble,
-  kFloat
+  kChar = 0,
+  kUChar = 1,
+  kInt = 2,
+  kUInt = 3,
+  kLong = 4,
+  kULong = 5,
+  kFloat = 6,
+  kDouble = 7
 };
 }  // namespace mpi
 /*!

include/rabit/rabit-inl.h

@@ -18,6 +18,14 @@ namespace mpi {
 template<typename DType>
 inline DataType GetType(void);
 template<>
+inline DataType GetType<char>(void) {
+  return kChar;
+}
+template<>
+inline DataType GetType<unsigned char>(void) {
+  return kUChar;
+}
+template<>
 inline DataType GetType<int>(void) {
   return kInt;
 }
@@ -26,6 +34,14 @@ inline DataType GetType<unsigned>(void) {
   return kUInt;
 }
 template<>
+inline DataType GetType<long>(void) {
+  return kLong;
+}
+template<>
+inline DataType GetType<unsigned long>(void) {
+  return kULong;
+}
+template<>
 inline DataType GetType<float>(void) {
   return kFloat;
 }

src/engine_mpi.cc

@@ -95,8 +95,12 @@ IEngine *GetEngine(void) {
 inline MPI::Datatype GetType(mpi::DataType dtype) {
   using namespace mpi;
   switch (dtype) {
+    case kChar: return MPI::CHAR;
+    case kUChar: return MPI::BYTE;
     case kInt: return MPI::INT;
     case kUInt: return MPI::UNSIGNED;
+    case kLong: return MPI::LONG;
+    case kULong: return MPI::UNSIGNED_LONG;
     case kFloat: return MPI::FLOAT;
     case kDouble: return MPI::DOUBLE;
   }