Predefined value for the "source" parameter to MPI receive or probe operations, which indicates that a message from any process may be matched.

Predefined value for the "tag" parameter to MPI receive or probe operations, which indicates that a message with any tag may be matched.

Compute the bitwise AND via an MPI reduction operation. See BitwiseAnd

Compute the bitwise OR via an MPI reduction operation. See BitwiseOr

A special marker used for the "buf" parameter to point-to-point operations and some collectives that indicates that the derived datatype contains absolute (rather than relative) addresses. The use of MPI_BOTTOM is not recommended. This facility is unused in C# and .NET.

Compute the bitwise exclusive OR via an MPI reduction operation. See ExclusiveOr

A single byte. This is equivalent to the byte type in C# and the System.Byte type in .NET.

A constant used to indicate whether a communicator has a Cartesian topology.

A single character. There is no equivalent to this type in C# or .NET.

Predefined communicator representing "no communicator". In the higher-level interface, this is represented by a nullCommunicator object.

Predefined communicator containing only the calling process. See self.

Predefined communicator containing all of the MPI processes. See world.

Constant used in comparisons of MPI objects to denote that two objects are congruent, meaning that the objects act the same way but are not identical. See Congruent.

A special datatype value that indicates "no datatype".

A double-precision floating-point value. The equivalent is double in C# and System.Double in .NET.

Error class indicating that permission was denied when accessing a file.

Error class indicating that the amode argument passed to MPI_File_open is invalid.

Error class indicating an invalid argument.

Error class indicating an invalid assert argument.

Error class indicating an invalid file name.

Error class indicating an invalid base argument.

Error class indicating an invalid buffer pointer.

Error class indicating an invalid communicator.

Error class indicating that an error occurred in a user-supplied data conversion function.

Error class indicating an invalid count argument.

Error class indicating an invalid dimension argument (for cartesian communicators).

Error class indicating an invalid displacement argument.

Error class indicating that conversion functions could not be registered because a conversion function has already been registered for this data representation identifier.

Error class indicating an invalid file handle argument.

Error class indicating that the file already exists.

Error class indicating that the file is already in use.

Error class indicating an invalid group argument.

Error class indicating that the actual error code is in the status argument.

Error class indicating an invalid info argument.

Error class indicating an invalid info key.

Error class indicating that the requested info key is not defined.

Error class indicating an invalid info value.

Error class indicating that an internal error occurred in the MPI implementation.

Error class indicating an I/O error.

Error class indicating an invalid attribute key.

The last valid error code for a predefined error class.

Error class indicating an invalid locktype argument.

Error class indicating that an attempt has been made to look up a service name that has not been published.

Error class indicating that no memory is available when trying to allocate memory with MPI_Alloc_mem.

Error class indicating that there is not enough space for the file.

Error class indicating that no such file exists.

Error class indicating that a collective argument is not the same on all processes, or collective routines were called in a different order.

Error class indicating an invalid operation argument.

Error class indicating an error that is know, but not described by other MPI error classes.

Error class indicating that a request is still pending.

Error class indicating that a named port does not exist or has been closed.

Error class indicating that the user's quota has been exceeded.

Error class indicating an invalid rank.

Error class indicating that the file is read-only.

Error class indicating an invalid request argument.

Error class indicating that there were conflicting accesses within a window.

Error class indicating that RMA calls were incorrectly synchronized.

Error class indicating an invalid root.

Error class indicating that an attempt to unpublish a service name that has already been unpublished or never was published.

Error class indicating an invalid size argument.

Error class indicating that an attempt to spawn a process has failed.

Error class indicating an invalid tag argument.

Error class indicating an invalid topology for a communicator argument.

Error class indicating that a message was truncated on receive.

Error class indicating an invalid data type argument.

Error class indicating that an unkown error occurred.

Error class indicating that an unsupported data representation was passed to MPI_FILE_SET_VIEW.

Error class indicating that an operation is unsupported.

Error class indicating an invalid window argument.

Predefined error handler that represents "no" error handler.

Predefined error handler that indicates that the MPI program should be terminated if an error occurs. This is the default error handler in the low-level MPI, which is overridden by MPI.NET.

Predefined error handler that indicates that the MPI routine that detected an error should return an error code. MPI.NET uses this error handler to translate MPI errors into program exceptions.

A single-precision floating-point value. The equivalent is float in C# and System.Single in .NET.

A constant used to indicate whether a communicator has a Graph topology.

An empty group containing no processes. See empty.

A constant used to indicate the "null" group of processes. Corresponds to a null Group.

Predefined attribute key that can be used to determine the rank of the host process associated with MPI_COMM_WORLD. If there is no host, the result will be MPI_PROC_NULL. See HostRank.

Constant used in comparisons of MPI objects to denote that two objects are identical. See Identical.

A special info key used to indicate that no extra information is being passed into a routine.

A signed integer. This is equivalent to the int type in C# and System.Int32 in .NET.

Predefined attribute key that can be used to determine the rank of the process than can perform I/O via the language-standard I/O mechanism. If every process can provided language-standard I/O, the resulting value will be MPI_ANY_SOURCE; if no process can support language-standard I/O, the result will be MPI_PROC_NULL. See IORank.

Special key value that indicates an invalid key.

Compute the logical AND via an MPI reduction operation. See LogicalAnd

A special marker that indicates the lower bound of an MPI datatype, and is typically only used by very low-level MPI operations that build special, derived datatypes. The .NET equivalent is the DatatypeCache..::.LowerBound type.

A long signed integer. There is no equivalent in C# or .NET, because the 64-bit integer in C# and .NET is mapped to MPI_LONG_LONG_INT.

An extended-precision floating-point value. There is no equivalent in C# or .NET.

A long long signed integer. The equivalent is long in C# and System.Int64 in .NET. This is a synonym for MPI_LONG_LONG_INT.

A long long signed integer. The equivalent is long in C# and System.Int64 in .NET. This is a synonym for MPI_LONG_LONG.

Compute the logical OR via an MPI reduction operation. See LogicalOr

Compute the logical exclusive OR via an MPI reduction operation. There is no high-level operation corresponding to this predefined MPI reduction.

Compute the maximum value via an MPI reduction operation. See Max.

The maximum number of characters that can occur in an error string returned from MPI_Error_string(Int32, array<Byte>[]()[], Int32%).

The maximum length of the string returned by MPI_Get_processor_name(array<Byte>[]()[], Int32%).

Compute the maximum value and location of that value via an MPI reduction operation. There is no high-level operation corresponding to this predefined MPI reduction.

Compute the minimum value via an MPI reduction operation. See Min.

Compute the minimum value and location of that value via an MPI reduction operation. There is no high-level operation corresponding to this predefined MPI reduction.

Special "null" copy function that indicates that an attribute should not be copied.

Special "null" deletion function that indicates that no delete function should be called when an attribute is removed from a communicator.

Placeholder operation that indicates "no operation".

A special data type used to indicate data that has been packed with MPI_Pack(IntPtr, Int32, Int32, IntPtr, Int32, Int32%, Int32). This type is only used by the lowest-level MPI operations. The .NET equivalent is the DatatypeCache..::.Packed type.

Special value for the source or dest argument to any communication operation, which indicates that the communication is a no-op. Not supported in MPI.NET.

Compute the product via an MPI reduction operation. See Multiply

Constant that indicates a "null" MPI request, meaning that there is no such request.

A signed short integer. This is equivalent to the short type in C# and System.Int16 in .NET.

A single, signed character. This is equivalent to the sbyte type in C# and the System.SByte type in .NET.

Constant used in comparisons of MPI objects to denote that two objects are similar, but assign different ranks to each of the processes. See Similar.

Constant used to indicate that the MPI_Status argument of an MPI operation will be ignored.

Constant used to indicate that the array of MPI_Status arguments to an MPI operation will be ignored.

Error value indicating no error.

Compute the sum via an MPI reduction operation. See Add

Predefined attribute key that can be used to determine the maximum tag value that users are allowed to provide to a communication request. See MaxTag.

Indicates that the MPI program is multi-threaded, but all MPI operations will be called from the main thread. See Funneled.

Indicates that the MPI program is multi-threaded, and any thread can call into MPI at any time. See Multiple.

Indicates that the MPI program is multi-threaded, but only one thread will call into MPI at any given time. See Serialized.

Indicates that the MPI program is single-threaded. See Single.

A special marker that indices the upper bound of an MPI datatype, and is typically only used by very low-level MPI operations that build special, derived datatypes. The .NET equivalent is the DatatypeCache..::.UpperBound type.

"Undefined" value used to identify when a rank is not a part of a group. See NoProcess.

Constant used in comparisons of MPI objects to denote that two objects are completely different. See Unequal.

An unsigned integer. This is equivalent to the uint type in C# and System.UInt32 in .NET.

A single, unsigned character. There is no equivalent to this type in C# or .NET.

A long unsigned integer. There is no equivalent in C# or .NET, because the 64-bit unsigned integer in C# and .NET is mapped to MPI_UNSIGNED_LONG_LONG.

A long long unsigned integer. The equivalent is ulong in C# and System.UInt64 in .NET.

An unsigned short integer. This is equivalent to the ushort type in C# and System.UInt16 in .NET.

A single, wide character. The equivalent is char in C# and System.Char in .NET.

Predefined attribute key that can be used to determine whether the clocks (accessed via MPI_Wtime()()()) are synchronized across all processes. See IsTimeGlobal.