/*@
MPI_Comm_join - Create a communicator by joining two processes connected by
a socket.
Input Parameter:
. fd - socket file descriptor
Output Parameter:
. intercomm - new intercommunicator (handle)
Notes:
The socket must be quiescent before 'MPI_COMM_JOIN' is called and after
'MPI_COMM_JOIN' returns. More specifically, on entry to 'MPI_COMM_JOIN', a
read on the socket will not read any data that was written to the socket
before the remote process called 'MPI_COMM_JOIN'.
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
@*/
int MPI_Comm_join(int fd, MPI_Comm *intercomm)
{
static const char FCNAME[] = "MPI_Comm_join";
int mpi_errno = MPI_SUCCESS, err;
MPID_Comm *intercomm_ptr;
char *local_port, *remote_port;
MPIU_CHKLMEM_DECL(2);
MPID_MPI_STATE_DECL(MPID_STATE_MPI_COMM_JOIN);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPIU_THREAD_CS_ENTER(ALLFUNC,);
MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_COMM_JOIN);
/* ... body of routine ... */
MPIU_CHKLMEM_MALLOC(local_port, char *, MPI_MAX_PORT_NAME, mpi_errno, "local port name");
MPIU_CHKLMEM_MALLOC(remote_port, char *, MPI_MAX_PORT_NAME, mpi_errno, "remote port name");
mpi_errno = MPIR_Open_port_impl(NULL, local_port);
MPIU_ERR_CHKANDJUMP((mpi_errno != MPI_SUCCESS), mpi_errno, MPI_ERR_OTHER, "**openportfailed");
err = MPIR_fd_send(fd, local_port, MPI_MAX_PORT_NAME);
MPIU_ERR_CHKANDJUMP1((err != 0), mpi_errno, MPI_ERR_INTERN, "**join_send", "**join_send %d", err);
err = MPIR_fd_recv(fd, remote_port, MPI_MAX_PORT_NAME);
MPIU_ERR_CHKANDJUMP1((err != 0), mpi_errno, MPI_ERR_INTERN, "**join_recv", "**join_recv %d", err);
MPIU_ERR_CHKANDJUMP2((strcmp(local_port, remote_port) == 0), mpi_errno, MPI_ERR_INTERN, "**join_portname",
"**join_portname %s %s", local_port, remote_port);
if (strcmp(local_port, remote_port) < 0) {
MPID_Comm *comm_self_ptr;
MPID_Comm_get_ptr( MPI_COMM_SELF, comm_self_ptr );
mpi_errno = MPIR_Comm_accept_impl(local_port, NULL, 0, comm_self_ptr, &intercomm_ptr);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
} else {
MPID_Comm *comm_self_ptr;
MPID_Comm_get_ptr( MPI_COMM_SELF, comm_self_ptr );
mpi_errno = MPIR_Comm_connect_impl(remote_port, NULL, 0, comm_self_ptr, &intercomm_ptr);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
mpi_errno = MPIR_Close_port_impl(local_port);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
MPIU_OBJ_PUBLISH_HANDLE(*intercomm, intercomm_ptr->handle);
/* ... end of body of routine ... */
fn_exit:
MPIU_CHKLMEM_FREEALL();
MPID_MPI_FUNC_EXIT(MPID_STATE_MPI_COMM_JOIN);
MPIU_THREAD_CS_EXIT(ALLFUNC,);
return mpi_errno;
fn_fail:
/* --BEGIN ERROR HANDLING-- */
# ifdef HAVE_ERROR_CHECKING
{
mpi_errno = MPIR_Err_create_code(
mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER, "**mpi_comm_join",
"**mpi_comm_join %d %p", fd, intercomm);
}
# endif
mpi_errno = MPIR_Err_return_comm( NULL, FCNAME, mpi_errno );
goto fn_exit;
/* --END ERROR HANDLING-- */
}
/*@
MPI_Comm_accept - Accept a request to form a new intercommunicator
Input Parameters:
+ port_name - port name (string, used only on root)
. info - implementation-dependent information (handle, used only on root)
. root - rank in comm of root node (integer)
- comm - intracommunicator over which call is collective (handle)
Output Parameters:
. newcomm - intercommunicator with client as remote group (handle)
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_INFO
.N MPI_ERR_COMM
@*/
int MPI_Comm_accept(const char *port_name, MPI_Info info, int root, MPI_Comm comm,
MPI_Comm *newcomm)
{
int mpi_errno = MPI_SUCCESS;
MPIR_Comm *comm_ptr = NULL;
MPIR_Comm *newcomm_ptr = NULL;
MPIR_Info *info_ptr = NULL;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_COMM_ACCEPT);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_COMM_ACCEPT);
/* Validate parameters, especially handles needing to be converted */
# ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_COMM(comm, mpi_errno);
MPIR_ERRTEST_INFO_OR_NULL(info, mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
# endif
/* Convert MPI object handles to object pointers */
MPIR_Comm_get_ptr( comm, comm_ptr );
MPIR_Info_get_ptr( info, info_ptr );
/* Validate parameters and objects (post conversion) */
# ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
/* Validate comm_ptr */
MPIR_Comm_valid_ptr( comm_ptr, mpi_errno, FALSE );
if (mpi_errno) goto fn_fail;
}
MPID_END_ERROR_CHECKS;
}
# endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
mpi_errno = MPIR_Comm_accept_impl(port_name, info_ptr, root, comm_ptr, &newcomm_ptr);
if (mpi_errno) goto fn_fail;
MPIR_OBJ_PUBLISH_HANDLE(*newcomm, newcomm_ptr->handle);
/* ... end of body of routine ... */
fn_exit:
MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_COMM_ACCEPT);
MPID_THREAD_CS_EXIT(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
return mpi_errno;
fn_fail:
/* --BEGIN ERROR HANDLING-- */
# ifdef HAVE_ERROR_CHECKING
{
mpi_errno = MPIR_Err_create_code(
mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER, "**mpi_comm_accept",
"**mpi_comm_accept %s %I %d %C %p", port_name, info, root, comm, newcomm);
}
# endif
mpi_errno = MPIR_Err_return_comm( comm_ptr, FCNAME, mpi_errno );
goto fn_exit;
/* --END ERROR HANDLING-- */
}
