/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
* (C) 2001 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
#include "mpiimpl.h"
/* -- Begin Profiling Symbol Block for routine MPI_Is_thread_main */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Is_thread_main = PMPI_Is_thread_main
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Is_thread_main MPI_Is_thread_main
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Is_thread_main as PMPI_Is_thread_main
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Is_thread_main(int *flag) __attribute__ ((weak, alias("PMPI_Is_thread_main")));
#endif
/* -- End Profiling Symbol Block */
/* Define MPICH_MPI_FROM_PMPI if weak symbols are not supported to build
the MPI routines */
#ifndef MPICH_MPI_FROM_PMPI
#undef MPI_Is_thread_main
#define MPI_Is_thread_main PMPI_Is_thread_main
#endif
#undef FUNCNAME
#define FUNCNAME MPI_Is_thread_main
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_Is_thread_main - Returns a flag indicating whether this thread called
'MPI_Init' or 'MPI_Init_thread'
Output Parameters:
. flag - Flag is true if 'MPI_Init' or 'MPI_Init_thread' has been called by
this thread and false otherwise. (logical)
.N SignalSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
@*/
int MPI_Is_thread_main(int *flag)
{
int mpi_errno = MPI_SUCCESS;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_IS_THREAD_MAIN);
MPIR_ERRTEST_INITIALIZED_ORDIE();
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_ARGNULL(flag, "flag", mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_IS_THREAD_MAIN);
/* ... body of routine ... */
#if MPICH_THREAD_LEVEL <= MPI_THREAD_FUNNELED || ! defined(MPICH_IS_THREADED)
{
*flag = TRUE;
}
#else
{
MPID_Thread_id_t my_thread_id;
MPID_Thread_self(&my_thread_id);
MPID_Thread_same(&MPIR_ThreadInfo.master_thread, &my_thread_id, flag);
}
#endif
/* ... end of body of routine ... */
#ifdef HAVE_ERROR_CHECKING
fn_exit:
#endif
MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_IS_THREAD_MAIN);
return mpi_errno;
/* --BEGIN ERROR HANDLING-- */
#ifdef HAVE_ERROR_CHECKING
fn_fail:
{
mpi_errno = MPIR_Err_create_code(mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__,
MPI_ERR_OTHER, "**mpi_is_thread_main",
"**mpi_is_thread_main %p", flag);
}
mpi_errno = MPIR_Err_return_comm(0, FCNAME, mpi_errno);
goto fn_exit;
#endif
/* --END ERROR HANDLING-- */
}