|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
<HTML>
|
|
Packit |
0848f5 |
<HEAD>
|
|
Packit |
0848f5 |
<META NAME="GENERATOR" CONTENT="DOCTEXT">
|
|
Packit |
0848f5 |
<TITLE>MPI_Ssend_init</TITLE>
|
|
Packit |
0848f5 |
</HEAD>
|
|
Packit |
0848f5 |
<BODY BGCOLOR="FFFFFF">
|
|
Packit |
0848f5 |
MPI_Ssend_init
|
|
Packit |
0848f5 |
Creates a persistent request for a synchronous send
|
|
Packit |
0848f5 |
Synopsis
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
int MPI_Ssend_init(const void *buf, int count, MPI_Datatype datatype, int dest,
|
|
Packit |
0848f5 |
int tag, MPI_Comm comm, MPI_Request *request)
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
Input Parameters
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
buf initial address of send buffer (choice)
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
count number of elements sent (integer)
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
datatype type of each element (handle)
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
dest rank of destination (integer)
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
tag message tag (integer)
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
comm communicator (handle)
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
Output Parameters
|
|
Packit |
0848f5 |
- request
- communication request (handle)
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
Thread and Interrupt Safety
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
This routine is thread-safe. This means that this routine may be
|
|
Packit |
0848f5 |
safely used by multiple threads without the need for any user-provided
|
|
Packit |
0848f5 |
thread locks. However, the routine is not interrupt safe. Typically,
|
|
Packit |
0848f5 |
this is due to the use of memory allocation routines such as <tt>malloc
|
|
Packit |
0848f5 |
</tt>or other non-MPICH runtime routines that are themselves not interrupt-safe.
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
Notes for Fortran
|
|
Packit |
0848f5 |
All MPI routines in Fortran (except for <tt>MPI_WTIME</tt> and <tt>MPI_WTICK</tt>) have
|
|
Packit |
0848f5 |
an additional argument <tt>ierr</tt> at the end of the argument list. <tt>ierr
|
|
Packit |
0848f5 |
</tt>is an integer and has the same meaning as the return value of the routine
|
|
Packit |
0848f5 |
in C. In Fortran, MPI routines are subroutines, and are invoked with the
|
|
Packit |
0848f5 |
<tt>call</tt> statement.
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
All MPI objects (e.g., <tt>MPI_Datatype</tt>, <tt>MPI_Comm</tt>) are of type <tt>INTEGER
|
|
Packit |
0848f5 |
</tt>in Fortran.
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
Errors
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
All MPI routines (except <tt>MPI_Wtime</tt> and <tt>MPI_Wtick</tt>) return an error value;
|
|
Packit |
0848f5 |
C routines as the value of the function and Fortran routines in the last
|
|
Packit |
0848f5 |
argument. Before the value is returned, the current MPI error handler is
|
|
Packit |
0848f5 |
called. By default, this error handler aborts the MPI job. The error handler
|
|
Packit |
0848f5 |
may be changed with <tt>MPI_Comm_set_errhandler</tt> (for communicators),
|
|
Packit |
0848f5 |
<tt>MPI_File_set_errhandler</tt> (for files), and <tt>MPI_Win_set_errhandler</tt> (for
|
|
Packit |
0848f5 |
RMA windows). The MPI-1 routine <tt>MPI_Errhandler_set</tt> may be used but
|
|
Packit |
0848f5 |
its use is deprecated. The predefined error handler
|
|
Packit |
0848f5 |
<tt>MPI_ERRORS_RETURN</tt> may be used to cause error values to be returned.
|
|
Packit |
0848f5 |
Note that MPI does not guarentee that an MPI program can continue past
|
|
Packit |
0848f5 |
an error; however, MPI implementations will attempt to continue whenever
|
|
Packit |
0848f5 |
possible.
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
- MPI_SUCCESS
- No error; MPI routine completed successfully.
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
- MPI_ERR_COMM
- Invalid communicator. A common error is to use a null
|
|
Packit |
0848f5 |
communicator in a call (not even allowed in <tt>MPI_Comm_rank</tt>).
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
- MPI_ERR_COUNT
- Invalid count argument. Count arguments must be
|
|
Packit |
0848f5 |
non-negative; a count of zero is often valid.
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
- MPI_ERR_TYPE
- Invalid datatype argument. Additionally, this error can
|
|
Packit |
0848f5 |
occur if an uncommitted MPI_Datatype (see <tt>MPI_Type_commit</tt>) is used
|
|
Packit |
0848f5 |
in a communication call.
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
- MPI_ERR_TAG
- Invalid tag argument. Tags must be non-negative; tags
|
|
Packit |
0848f5 |
in a receive (<tt>MPI_Recv</tt>, <tt>MPI_Irecv</tt>, <tt>MPI_Sendrecv</tt>, etc.) may
|
|
Packit |
0848f5 |
also be <tt>MPI_ANY_TAG</tt>. The largest tag value is available through the
|
|
Packit |
0848f5 |
the attribute <tt>MPI_TAG_UB</tt>.
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
- MPI_ERR_RANK
- Invalid source or destination rank. Ranks must be between
|
|
Packit |
0848f5 |
zero and the size of the communicator minus one; ranks in a receive
|
|
Packit |
0848f5 |
(<tt>MPI_Recv</tt>, <tt>MPI_Irecv</tt>, <tt>MPI_Sendrecv</tt>, etc.) may also be <tt>MPI_ANY_SOURCE</tt>.
|
|
Packit |
0848f5 |
|
|
Packit |
0848f5 |
</BODY></HTML>
|