/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
 *  (C) 2011 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */

#include "mpiimpl.h"

/* -- Begin Profiling Symbol Block for routine MPI_T_pvar_session_create */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_T_pvar_session_create = PMPI_T_pvar_session_create
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_T_pvar_session_create  MPI_T_pvar_session_create
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_T_pvar_session_create as PMPI_T_pvar_session_create
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_T_pvar_session_create(MPI_T_pvar_session *session) __attribute__((weak,alias("PMPI_T_pvar_session_create")));
#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_T_pvar_session_create
#define MPI_T_pvar_session_create PMPI_T_pvar_session_create

/* any non-MPI functions go here, especially non-static ones */

#undef FUNCNAME
#define FUNCNAME MPIR_T_pvar_session_create_impl
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPIR_T_pvar_session_create_impl(MPI_T_pvar_session *session)
{
    int mpi_errno = MPI_SUCCESS;
    MPIU_CHKPMEM_DECL(1);

    *session = MPI_T_PVAR_SESSION_NULL;

    MPIU_CHKPMEM_MALLOC(*session, MPI_T_pvar_session, sizeof(**session), mpi_errno, "performance var session");

    /* essential for utlist to work */
    (*session)->hlist = NULL;

#ifdef HAVE_ERROR_CHECKING
    (*session)->kind = MPIR_T_PVAR_SESSION;
#endif

    MPIU_CHKPMEM_COMMIT();
fn_exit:
    return mpi_errno;
fn_fail:
    MPIU_CHKPMEM_REAP();
    goto fn_exit;
}

#endif /* MPICH_MPI_FROM_PMPI */

#undef FUNCNAME
#define FUNCNAME MPI_T_pvar_session_create
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_T_pvar_session_create - Create a new session for accessing performance variables

Output Parameters:
. session - identifier of performance session (handle)

.N ThreadSafe

.N Errors
.N MPI_SUCCESS
.N MPI_T_ERR_NOT_INITIALIZED
.N MPI_T_ERR_OUT_OF_SESSIONS
@*/
int MPI_T_pvar_session_create(MPI_T_pvar_session *session)
{
    int mpi_errno = MPI_SUCCESS;

    MPID_MPI_STATE_DECL(MPID_STATE_MPI_T_PVAR_SESSION_CREATE);
    MPIR_ERRTEST_MPIT_INITIALIZED(mpi_errno);
    MPIR_T_THREAD_CS_ENTER();
    MPID_MPI_FUNC_ENTER(MPID_STATE_MPI_T_PVAR_SESSION_CREATE);

    /* Validate parameters, especially handles needing to be converted */
#   ifdef HAVE_ERROR_CHECKING
    {
        MPID_BEGIN_ERROR_CHECKS
        {
            MPIR_ERRTEST_ARGNULL(session, "session", mpi_errno);
        }
        MPID_END_ERROR_CHECKS
    }
#   endif /* HAVE_ERROR_CHECKING */

    /* ... body of routine ...  */

    mpi_errno = MPIR_T_pvar_session_create_impl(session);
    if (mpi_errno != MPI_SUCCESS) goto fn_fail;

    /* ... end of body of routine ... */

fn_exit:
    MPID_MPI_FUNC_EXIT(MPID_STATE_MPI_T_PVAR_SESSION_CREATE);
    MPIR_T_THREAD_CS_EXIT();
    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_t_pvar_session_create", "**mpi_t_pvar_session_create %p", session);
    }
#   endif
    mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);
    goto fn_exit;
    /* --END ERROR HANDLING-- */
}