Hello Everyone,
I wrote a small C++ MPI program to do an ISend:
/*some declarations here */
MPI::Request Isend_request_status;
...
...
/* do the transmission */
Isend_request_status = MPI::COMM_WORLD.Isend(this->transmitbuffer,
this->transmissionsize, MPI_BYTE, (this->dbIterator)->first,
std::get<0>(this->TransmissionDetails));
/* Check if the transmit was successful */
if (MPI::Request::Test(Isend_request_status))
{
/* done :) */
}
However, building it gives the error:
no matching function for call to ‘MPI::Request::Test(MPI::Request&)’
I am using gcc-4.6 on Linux, with OpenMPI- 1.4.3.
I looked up the headers for the calls:
inline MPI::Request
MPI::Comm::Isend(const void *buf, int count,
const MPI::Datatype & datatype, int dest, int tag) const
So, the MPI::COMM_WORLD::ISend(...) should return me variable of type
MPI::Request.
And,
inline bool
MPI::Request::Test(MPI::Status &status)
This takes in the variable of type MPI::Status.
So, two questions:
(1). Is there a problem due to incompatible types? If so, how do I fix it?
(2). Why would the MPI::Request::Test take in a different type than what is
returned by MPI::COMM_WORLD::ISend(...)?
It would really help if you could help me fix the example that I have shown.
I understand it would be easier to do this in C, but there are project
requirements that led me to C++.
Can someone please help?
Thanks a lot.
Devendra
sd
