NAME

       MPIL_Signal -  LAM/MPI-specific function to send a LAM signal to a rank in an MPI communicator

SYNOPSIS

       #include <mpi.h>
       int MPIL_Signal(MPI_Comm comm, int rank, int signo)

INPUT PARAMETERS

       comm   - MPI communicator (handle)
       rank   - rank to send it to
       signo  - signal number

NOTES

       An  asynchronous  signal is delivered from one process to another with MPIL_Signal().  The target process
       is selected with a communicator and a process rank within that  communicator.   The  remaining  argument,
       signo,  identifies  the  signal  to  be  delivered.   These signals are completely apart from the signals
       provided by the underlying operating system.  LAM signals, defined in <lam_ksignal.h>, are listed below.

       LAM_SIGTRACE   1    unload trace data
       LAM_SIGC       2    user defined
       LAM_SIGARECV   3    async receive pending
       LAM_SIGUDIE    4    terminate
       LAM_SIGARREST  5    suspend execution
       LAM_SIGRELEASE 6    continue execution
       LAM_SIGA       7    user defined
       LAM_SIGB       8    user defined
       LAM_SIGFUSE    9    node about to die
       LAM_SIGSHRINK  10   another node has died

       This is a LAM/MPI-specific function.  Most users should not have use for this function.  If this function
       is used, it should be used in conjunction with the LAM_MPI C preprocessor macro

       #if LAM_MPI
       MPIL_Signal(MPI_COMM_WORLD, 0, LAM_SIGUDIE);
       #endif

NOTES FOR FORTRAN

       All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have an additional argument ierr at the
       end of the argument list.  ierr is an integer and has the same meaning as the return value of the routine
       in C.  In Fortran, MPI routines are subroutines, and are invoked with the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran.

ERRORS

       If an error occurs in an MPI function, the current MPI error handler is called to handle it.  By default,
       this error handler aborts the MPI job.  The error handler may be changed with  MPI_Errhandler_set  ;  the
       predefined  error  handler  MPI_ERRORS_RETURN  may be used to cause error values to be returned (in C and
       Fortran; this error handler is less useful in with the C++ MPI bindings.  The  predefined  error  handler
       MPI::ERRORS_THROW_EXCEPTIONS  should be used in C++ if the error value needs to be recovered).  Note that
       MPI does not guarantee that an MPI program can continue past an error.

       All MPI routines (except MPI_Wtime and MPI_Wtick ) return an error value; C routines as the value of  the
       function and Fortran routines in the last argument.  The C++ bindings for MPI do not return error values;
       instead, error values are communicated  by  throwing  exceptions  of  type  MPI::Exception  (but  not  by
       default).  Exceptions are only thrown if the error value is not MPI::SUCCESS .

       Note that if the MPI::ERRORS_RETURN handler is set in C++, while MPI functions will return upon an error,
       there will be no way to recover what the actual error value was.
       MPI_SUCCESS
              - No error; MPI routine completed successfully.
       MPI_ERR_COMM
              - Invalid communicator.  A common error is to use a null communicator in a call (not even  allowed
              in MPI_Comm_rank ).
       MPI_ERR_RANK
              - Invalid source or destination rank.  Ranks must be between zero and the size of the communicator
              minus one; ranks in a receive  (  MPI_Recv  ,  MPI_Irecv  ,  MPI_Sendrecv  ,  etc.)  may  also  be
              MPI_ANY_SOURCE .

       MPI_ERR_OTHER
              - Other error; use MPI_Error_string to get more information about this error code.

SEE ALSO

       lam_ksignal

LOCATION

       mpil_signal.c