int MPIR_Comm_create(MPID_Comm ** newcomm_ptr)
{
int mpi_errno = MPI_SUCCESS;
MPID_Comm *newptr;
MPID_MPI_STATE_DECL(MPID_STATE_MPIR_COMM_CREATE);
MPID_MPI_FUNC_ENTER(MPID_STATE_MPIR_COMM_CREATE);
newptr = (MPID_Comm *) MPIU_Handle_obj_alloc(&MPID_Comm_mem);
MPIR_ERR_CHKANDJUMP(!newptr, mpi_errno, MPI_ERR_OTHER, "**nomem");
*newcomm_ptr = newptr;
mpi_errno = MPIR_Comm_init(newptr);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
/* Insert this new communicator into the list of known communicators.
* Make this conditional on debugger support to match the test in
* MPIR_Comm_release . */
MPIR_COMML_REMEMBER(newptr);
fn_fail:
MPID_MPI_FUNC_EXIT(MPID_STATE_MPIR_COMM_CREATE);
return mpi_errno;
}
int MPIR_Init_thread(int * argc, char ***argv, int required, int * provided)
{
int mpi_errno = MPI_SUCCESS;
int has_args;
int has_env;
int thread_provided;
int exit_init_cs_on_failure = 0;
/* For any code in the device that wants to check for runtime
decisions on the value of isThreaded, set a provisional
value here. We could let the MPID_Init routine override this */
#ifdef HAVE_RUNTIME_THREADCHECK
MPIR_ThreadInfo.isThreaded = required == MPI_THREAD_MULTIPLE;
#endif
MPIU_THREAD_CS_INIT;
/* FIXME: Move to os-dependent interface? */
#ifdef HAVE_WINDOWS_H
/* prevent the process from bringing up an error message window if mpich
asserts */
_CrtSetReportMode( _CRT_ASSERT, _CRTDBG_MODE_FILE );
_CrtSetReportFile( _CRT_ASSERT, _CRTDBG_FILE_STDERR );
_CrtSetReportHook2(_CRT_RPTHOOK_INSTALL, assert_hook);
#ifdef _WIN64
{
/* FIXME: (Windows) This severly degrades performance but fixes alignment
issues with the datatype code. */
/* Prevent misaligned faults on Win64 machines */
UINT mode, old_mode;
old_mode = SetErrorMode(SEM_NOALIGNMENTFAULTEXCEPT);
mode = old_mode | SEM_NOALIGNMENTFAULTEXCEPT;
SetErrorMode(mode);
}
#endif
#endif
/* We need this inorder to implement IS_THREAD_MAIN */
# if (MPICH_THREAD_LEVEL >= MPI_THREAD_SERIALIZED) && defined(MPICH_IS_THREADED)
{
MPID_Thread_self(&MPIR_ThreadInfo.master_thread);
}
# endif
#ifdef HAVE_ERROR_CHECKING
/* Because the PARAM system has not been initialized, temporarily
uncondtionally enable error checks. Once the PARAM system is
initialized, this may be reset */
MPIR_Process.do_error_checks = 1;
#else
MPIR_Process.do_error_checks = 0;
#endif
/* Initialize necessary subsystems and setup the predefined attribute
values. Subsystems may change these values. */
MPIR_Process.attrs.appnum = -1;
MPIR_Process.attrs.host = 0;
MPIR_Process.attrs.io = 0;
MPIR_Process.attrs.lastusedcode = MPI_ERR_LASTCODE;
MPIR_Process.attrs.tag_ub = 0;
MPIR_Process.attrs.universe = MPIR_UNIVERSE_SIZE_NOT_SET;
MPIR_Process.attrs.wtime_is_global = 0;
/* Set the functions used to duplicate attributes. These are
when the first corresponding keyval is created */
MPIR_Process.attr_dup = 0;
MPIR_Process.attr_free = 0;
#ifdef HAVE_CXX_BINDING
/* Set the functions used to call functions in the C++ binding
for reductions and attribute operations. These are null
until a C++ operation is defined. This allows the C code
that implements these operations to not invoke a C++ code
directly, which may force the inclusion of symbols known only
to the C++ compiler (e.g., under more non-GNU compilers, including
Solaris and IRIX). */
MPIR_Process.cxx_call_op_fn = 0;
#endif
/* This allows the device to select an alternative function for
dimsCreate */
MPIR_Process.dimsCreate = 0;
/* "Allocate" from the reserved space for builtin communicators and
(partially) initialize predefined communicators. comm_parent is
intially NULL and will be allocated by the device if the process group
was started using one of the MPI_Comm_spawn functions. */
MPIR_Process.comm_world = MPID_Comm_builtin + 0;
MPIR_Comm_init(MPIR_Process.comm_world);
MPIR_Process.comm_world->handle = MPI_COMM_WORLD;
MPIR_Process.comm_world->context_id = 0 << MPID_CONTEXT_PREFIX_SHIFT;
MPIR_Process.comm_world->recvcontext_id = 0 << MPID_CONTEXT_PREFIX_SHIFT;
MPIR_Process.comm_world->comm_kind = MPID_INTRACOMM;
/* This initialization of the comm name could be done only when
comm_get_name is called */
MPIU_Strncpy(MPIR_Process.comm_world->name, "MPI_COMM_WORLD",
MPI_MAX_OBJECT_NAME);
MPIR_Process.comm_self = MPID_Comm_builtin + 1;
MPIR_Comm_init(MPIR_Process.comm_self);
MPIR_Process.comm_self->handle = MPI_COMM_SELF;
MPIR_Process.comm_self->context_id = 1 << MPID_CONTEXT_PREFIX_SHIFT;
MPIR_Process.comm_self->recvcontext_id = 1 << MPID_CONTEXT_PREFIX_SHIFT;
MPIR_Process.comm_self->comm_kind = MPID_INTRACOMM;
MPIU_Strncpy(MPIR_Process.comm_self->name, "MPI_COMM_SELF",
MPI_MAX_OBJECT_NAME);
#ifdef MPID_NEEDS_ICOMM_WORLD
MPIR_Process.icomm_world = MPID_Comm_builtin + 2;
MPIR_Comm_init(MPIR_Process.icomm_world);
MPIR_Process.icomm_world->handle = MPIR_ICOMM_WORLD;
MPIR_Process.icomm_world->context_id = 2 << MPID_CONTEXT_PREFIX_SHIFT;
MPIR_Process.icomm_world->recvcontext_id= 2 << MPID_CONTEXT_PREFIX_SHIFT;
MPIR_Process.icomm_world->comm_kind = MPID_INTRACOMM;
MPIU_Strncpy(MPIR_Process.icomm_world->name, "MPI_ICOMM_WORLD",
MPI_MAX_OBJECT_NAME);
/* Note that these communicators are not ready for use - MPID_Init
will setup self and world, and icomm_world if it desires it. */
#endif
MPIR_Process.comm_parent = NULL;
/* Setup the initial communicator list in case we have
enabled the debugger message-queue interface */
MPIR_COMML_REMEMBER( MPIR_Process.comm_world );
MPIR_COMML_REMEMBER( MPIR_Process.comm_self );
/* Call any and all MPID_Init type functions */
MPIR_Err_init();
MPIR_Datatype_init();
MPIR_Group_init();
/* MPIU_Timer_pre_init(); */
mpi_errno = MPIR_Param_init_params();
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
/* Wait for debugger to attach if requested. */
if (MPIR_PARAM_DEBUG_HOLD) {
volatile int hold = 1;
while (hold)
#ifdef HAVE_USLEEP
usleep(100);
#endif
;
}
#if HAVE_ERROR_CHECKING == MPID_ERROR_LEVEL_RUNTIME
MPIR_Process.do_error_checks = MPIR_PARAM_ERROR_CHECKING;
#endif
/* define MPI as initialized so that we can use MPI functions within
MPID_Init if necessary */
MPIR_Process.initialized = MPICH_WITHIN_MPI;
/* We can't acquire any critical sections until this point. Any
* earlier the basic data structures haven't been initialized */
MPIU_THREAD_CS_ENTER(INIT,required);
exit_init_cs_on_failure = 1;
mpi_errno = MPID_Init(argc, argv, required, &thread_provided,
&has_args, &has_env);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
/* Capture the level of thread support provided */
MPIR_ThreadInfo.thread_provided = thread_provided;
if (provided) *provided = thread_provided;
#ifdef HAVE_RUNTIME_THREADCHECK
MPIR_ThreadInfo.isThreaded = (thread_provided == MPI_THREAD_MULTIPLE);
#endif
/* FIXME: Define these in the interface. Does Timer init belong here? */
MPIU_dbg_init(MPIR_Process.comm_world->rank);
MPIU_Timer_init(MPIR_Process.comm_world->rank,
MPIR_Process.comm_world->local_size);
#ifdef USE_MEMORY_TRACING
MPIU_trinit( MPIR_Process.comm_world->rank );
/* Indicate that we are near the end of the init step; memory
allocated already will have an id of zero; this helps
separate memory leaks in the initialization code from
leaks in the "active" code */
/* Uncomment this code to leave out any of the MPID_Init/etc
memory allocations from the memory leak testing */
/* MPIU_trid( 1 ); */
#endif
#ifdef USE_DBG_LOGGING
MPIU_DBG_Init( argc, argv, has_args, has_env,
MPIR_Process.comm_world->rank );
#endif
/* Initialize the C versions of the Fortran link-time constants.
We now initialize the Fortran symbols from within the Fortran
interface in the routine that first needs the symbols.
This fixes a problem with symbols added by a Fortran compiler that
are not part of the C runtime environment (the Portland group
compilers would do this)
*/
#if defined(HAVE_FORTRAN_BINDING) && defined(HAVE_MPI_F_INIT_WORKS_WITH_C)
mpirinitf_();
#endif
/* FIXME: Does this need to come before the call to MPID_InitComplete?
For some debugger support, MPIR_WaitForDebugger may want to use
MPI communication routines to collect information for the debugger */
#ifdef HAVE_DEBUGGER_SUPPORT
MPIR_WaitForDebugger();
#endif
/* Let the device know that the rest of the init process is completed */
if (mpi_errno == MPI_SUCCESS)
mpi_errno = MPID_InitCompleted();
#if defined(_OSU_MVAPICH_) || defined(_OSU_PSM_)
if (is_shmem_collectives_enabled()){
if (check_split_comm(pthread_self())){
int my_id, size;
PMPI_Comm_rank(MPI_COMM_WORLD, &my_id);
PMPI_Comm_size(MPI_COMM_WORLD, &size);
disable_split_comm(pthread_self());
create_2level_comm(MPI_COMM_WORLD, size, my_id);
enable_split_comm(pthread_self());
}
}
#endif /* defined(_OSU_MVAPICH_) || defined(_OSU_PSM_) */
fn_exit:
MPIU_THREAD_CS_EXIT(INIT,required);
return mpi_errno;
fn_fail:
/* --BEGIN ERROR HANDLING-- */
/* signal to error handling routines that core services are unavailable */
MPIR_Process.initialized = MPICH_PRE_INIT;
if (exit_init_cs_on_failure) {
MPIU_THREAD_CS_EXIT(INIT,required);
}
MPIU_THREAD_CS_FINALIZE;
return mpi_errno;
/* --END ERROR HANDLING-- */
}
