finish mushroom example

src/sync/sync.h

@@ -15,11 +15,16 @@ namespace sync {
 /*! \brief reduce operator supported */
 enum ReduceOp {
   kSum,
+  kMax,
   kBitwiseOR
 };
 
 /*! \brief get rank of current process */
 int GetRank(void);
+/*! 
+ * \brief this is used to check if sync module is a true distributed implementation, or simply a dummpy
+ */
+bool IsDistributed(void);
 /*! \brief intiialize the synchronization module */
 void Init(int argc, char *argv[]);
 /*! \brief finalize syncrhonization module */

src/sync/sync_empty.cpp

@@ -6,18 +6,28 @@ namespace sync {
 int GetRank(void) {
   return 0;
 }
+
 void Init(int argc, char *argv[]) {
 }
+
 void Finalize(void) {
 }
+
+bool IsDistributed(void) {
+  return false;
+}
+
 template<>
 void AllReduce<uint32_t>(uint32_t *sendrecvbuf, int count, ReduceOp op) {
 }
+
 template<>
 void AllReduce<float>(float *sendrecvbuf, int count, ReduceOp op) {
 }
+
 void Bcast(std::string *sendrecv_data, int root) {
 }
+
 ReduceHandle::ReduceHandle(void) : handle(NULL) {}
 ReduceHandle::~ReduceHandle(void) {}
 void ReduceHandle::Init(ReduceFunction redfunc, bool commute) {}

src/sync/sync_mpi.cpp

@@ -12,6 +12,10 @@ void Init(int argc, char *argv[]) {
   MPI::Init(argc, argv);
 }
 
+bool IsDistributed(void) {
+  return true;
+}
+
 void Finalize(void) {
   MPI::Finalize();
 }
@@ -20,6 +24,7 @@ void AllReduce_(void *sendrecvbuf, int count, const MPI::Datatype &dtype, Reduce
   switch(op) {
     case kBitwiseOR: MPI::COMM_WORLD.Allreduce(MPI_IN_PLACE, sendrecvbuf, count, dtype, MPI::BOR); return;
     case kSum: MPI::COMM_WORLD.Allreduce(MPI_IN_PLACE, sendrecvbuf, count, dtype, MPI::SUM); return;
+    case kMax: MPI::COMM_WORLD.Allreduce(MPI_IN_PLACE, sendrecvbuf, count, dtype, MPI::MAX); return;
   }
 }