/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */

/* 

 *

 *   Copyright (C) 1997 University of Chicago. 

 *   See COPYRIGHT notice in top-level directory.

 */

#include "mpioimpl.h"

#ifdef HAVE_WEAK_SYMBOLS

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_File_close = PMPI_File_close

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_File_close MPI_File_close

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_File_close as PMPI_File_close

/* end of weak pragmas */

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_File_close(MPI_File *fh) __attribute__((weak,alias("PMPI_File_close")));

#endif

/* Include mapping from MPI->PMPI */

#define MPIO_BUILD_PROFILING

#include "mpioprof.h"

#endif

/*@

    MPI_File_close - Closes a file

Input Parameters:

. fh - file handle (handle)

.N fortran

@*/

int MPI_File_close(MPI_File *fh)

{

    int error_code;

    ADIO_File adio_fh;

    static char myname[] = "MPI_FILE_CLOSE";

#ifdef MPI_hpux

    int fl_xmpi;

    HPMP_IO_WSTART(fl_xmpi, BLKMPIFILECLOSE, TRDTBLOCK, *adio_fh);

#endif /* MPI_hpux */

    ROMIO_THREAD_CS_ENTER();

    adio_fh = MPIO_File_resolve(*fh);

    /* --BEGIN ERROR HANDLING-- */

    MPIO_CHECK_FILE_HANDLE(adio_fh, myname, error_code);

    /* --END ERROR HANDLING-- */

    if (ADIO_Feature(adio_fh, ADIO_SHARED_FP))

    {

	ADIOI_Free((adio_fh)->shared_fp_fname);

	/* POSIX semantics say a deleted file remains available until all

	 * processes close the file.  But since when was NFS posix-compliant?

	 */

	/* this used to be gated by the lack of the UNLINK_AFTER_CLOSE feature,

	 * but a race condition in GPFS necessated this.  See ticket #2214 */

	MPI_Barrier((adio_fh)->comm);

	if ((adio_fh)->shared_fp_fd != ADIO_FILE_NULL) {

	    MPI_File *fh_shared = &(adio_fh->shared_fp_fd);

	    ADIO_Close((adio_fh)->shared_fp_fd, &error_code);

            MPIO_File_free(fh_shared);

	    /* --BEGIN ERROR HANDLING-- */

	    if (error_code != MPI_SUCCESS) goto fn_fail;

	    /* --END ERROR HANDLING-- */

	}

    }

    /* Because ROMIO expects the MPI library to provide error handler management

     * routines but it doesn't ever participate in MPI_File_close, we have to

     * somehow inform the MPI library that we no longer hold a reference to any

     * user defined error handler.  We do this by setting the errhandler at this

     * point to MPI_ERRORS_RETURN. */

    error_code = PMPI_File_set_errhandler(*fh, MPI_ERRORS_RETURN);

    if (error_code != MPI_SUCCESS) goto fn_fail;

    ADIO_Close(adio_fh, &error_code);

    MPIO_File_free(fh);

    /* --BEGIN ERROR HANDLING-- */

    if (error_code != MPI_SUCCESS) goto fn_fail;

    /* --END ERROR HANDLING-- */

#ifdef MPI_hpux

    HPMP_IO_WEND(fl_xmpi);

#endif /* MPI_hpux */

fn_exit:

    ROMIO_THREAD_CS_EXIT();

    return error_code;

fn_fail:

    /* --BEGIN ERROR HANDLING-- */

    error_code = MPIO_Err_return_file(adio_fh, error_code);

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}