/*@
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 */
MPIU_THREAD_CS_ENTER(ALLFUNC,);
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?
*/
if (!ADIO_Feature(adio_fh, ADIO_UNLINK_AFTER_CLOSE)) {
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:
MPIU_THREAD_CS_EXIT(ALLFUNC,);
return error_code;
fn_fail:
/* --BEGIN ERROR HANDLING-- */
error_code = MPIO_Err_return_file(adio_fh, error_code);
goto fn_exit;
/* --END ERROR HANDLING-- */
}
/*@
MPI_File_open - Opens a file
Input Parameters:
. comm - communicator (handle)
. filename - name of file to open (string)
. amode - file access mode (integer)
. info - info object (handle)
Output Parameters:
. fh - file handle (handle)
.N fortran
@*/
int MPI_File_open(MPI_Comm comm, ROMIO_CONST char *filename, int amode,
MPI_Info info, MPI_File *fh)
{
int error_code = MPI_SUCCESS, file_system, flag, tmp_amode=0, rank;
char *tmp;
MPI_Comm dupcomm = MPI_COMM_NULL;
ADIOI_Fns *fsops;
static char myname[] = "MPI_FILE_OPEN";
#ifdef MPI_hpux
int fl_xmpi;
HPMP_IO_OPEN_START(fl_xmpi, comm);
#endif /* MPI_hpux */
MPIU_THREAD_CS_ENTER(ALLFUNC,);
/* --BEGIN ERROR HANDLING-- */
MPIO_CHECK_COMM(comm, myname, error_code);
MPIO_CHECK_INFO_ALL(info, error_code, comm);
/* --END ERROR HANDLING-- */
error_code = MPI_Comm_test_inter(comm, &flag);
/* --BEGIN ERROR HANDLING-- */
if (error_code || flag)
{
error_code = MPIO_Err_create_code(error_code, MPIR_ERR_RECOVERABLE,
myname, __LINE__, MPI_ERR_COMM,
"**commnotintra", 0);
goto fn_fail;
}
if ( ((amode&MPI_MODE_RDONLY)?1:0) + ((amode&MPI_MODE_RDWR)?1:0) +
((amode&MPI_MODE_WRONLY)?1:0) != 1 )
{
error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
myname, __LINE__, MPI_ERR_AMODE,
"**fileamodeone", 0);
goto fn_fail;
}
if ((amode & MPI_MODE_RDONLY) &&
((amode & MPI_MODE_CREATE) || (amode & MPI_MODE_EXCL)))
{
error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
myname, __LINE__, MPI_ERR_AMODE,
"**fileamoderead", 0);
goto fn_fail;
}
if ((amode & MPI_MODE_RDWR) && (amode & MPI_MODE_SEQUENTIAL))
{
error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
myname, __LINE__, MPI_ERR_AMODE,
"**fileamodeseq", 0);
goto fn_fail;
}
MPI_Comm_dup(comm, &dupcomm);
/* check if ADIO has been initialized. If not, initialize it */
MPIR_MPIOInit(&error_code);
if (error_code != MPI_SUCCESS) goto fn_fail;
/* check if amode is the same on all processes: at first glance, one might try
* to use a built-in operator like MPI_BAND, but we need every mpi process to
* agree the amode was not the same. Consider process A with
* MPI_MODE_CREATE|MPI_MODE_RDWR, and B with MPI_MODE_RDWR: MPI_BAND yields
* MPI_MODE_RDWR. A determines amodes are different, but B proceeds having not
* detected an error */
MPI_Allreduce(&amode, &tmp_amode, 1, MPI_INT, ADIO_same_amode, dupcomm);
if (tmp_amode == ADIO_AMODE_NOMATCH) {
error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
myname, __LINE__, MPI_ERR_NOT_SAME,
"**fileamodediff", 0);
goto fn_fail;
}
/* --END ERROR HANDLING-- */
file_system = -1;
/* resolve file system type from file name; this is a collective call */
ADIO_ResolveFileType(dupcomm, filename, &file_system, &fsops, &error_code);
/* --BEGIN ERROR HANDLING-- */
if (error_code != MPI_SUCCESS)
{
/* ADIO_ResolveFileType() will print as informative a message as it
* possibly can or call MPIO_Err_setmsg. We just need to propagate
* the error up.
*/
goto fn_fail;
}
/* --END ERROR HANDLING-- */
/* strip off prefix if there is one, but only skip prefixes
* if they are greater than length one to allow for windows
* drive specifications (e.g. c:\...) */
tmp = strchr(filename, ':');
if (tmp > filename + 1) {
filename = tmp + 1;
}
/* use default values for disp, etype, filetype */
*fh = ADIO_Open(comm, dupcomm, filename, file_system, fsops, amode, 0,
MPI_BYTE, MPI_BYTE, info, ADIO_PERM_NULL, &error_code);
/* --BEGIN ERROR HANDLING-- */
if (error_code != MPI_SUCCESS) {
goto fn_fail;
}
/* --END ERROR HANDLING-- */
/* if MPI_MODE_SEQUENTIAL requested, file systems cannot do explicit offset
* or independent file pointer accesses, leaving not much else aside from
* shared file pointer accesses. */
if ( !ADIO_Feature((*fh), ADIO_SHARED_FP) && (amode & MPI_MODE_SEQUENTIAL))
{
error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
myname, __LINE__,
MPI_ERR_UNSUPPORTED_OPERATION,
"**iosequnsupported", 0);
ADIO_Close(*fh, &error_code);
goto fn_fail;
}
/* determine name of file that will hold the shared file pointer */
/* can't support shared file pointers on a file system that doesn't
support file locking. */
if ((error_code == MPI_SUCCESS) &&
ADIO_Feature((*fh), ADIO_SHARED_FP)) {
MPI_Comm_rank(dupcomm, &rank);
ADIOI_Shfp_fname(*fh, rank, &error_code);
if (error_code != MPI_SUCCESS)
goto fn_fail;
/* if MPI_MODE_APPEND, set the shared file pointer to end of file.
indiv. file pointer already set to end of file in ADIO_Open.
Here file view is just bytes. */
if ((*fh)->access_mode & MPI_MODE_APPEND) {
if (rank == (*fh)->hints->ranklist[0]) /* only one person need set the sharedfp */
ADIO_Set_shared_fp(*fh, (*fh)->fp_ind, &error_code);
MPI_Barrier(dupcomm);
}
}
#ifdef MPI_hpux
HPMP_IO_OPEN_END(fl_xmpi, *fh, comm);
#endif /* MPI_hpux */
fn_exit:
MPIU_THREAD_CS_EXIT(ALLFUNC,);
return error_code;
fn_fail:
/* --BEGIN ERROR HANDLING-- */
if (dupcomm != MPI_COMM_NULL) MPI_Comm_free(&dupcomm);
error_code = MPIO_Err_return_file(MPI_FILE_NULL, error_code);
goto fn_exit;
/* --END ERROR HANDLING-- */
}
/*@
MPI_File_open - Opens a file
Input Parameters:
. comm - communicator (handle)
. filename - name of file to open (string)
. amode - file access mode (integer)
. info - info object (handle)
Output Parameters:
. fh - file handle (handle)
.N fortran
@*/
int MPI_File_open(MPI_Comm comm, char *filename, int amode,
MPI_Info info, MPI_File *fh)
{
int error_code, file_system, flag, tmp_amode, rank, orig_amode;
#ifndef PRINT_ERR_MSG
static char myname[] = "MPI_FILE_OPEN";
#endif
int err, min_code;
char *tmp;
MPI_Comm dupcomm, dupcommself;
#ifdef MPI_hpux
int fl_xmpi;
HPMP_IO_OPEN_START(fl_xmpi, comm);
#endif /* MPI_hpux */
error_code = MPI_SUCCESS;
if (comm == MPI_COMM_NULL) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: Invalid communicator\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_COMM, MPIR_ERR_COMM_NULL,
myname, (char *) 0, (char *) 0);
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
MPI_Comm_test_inter(comm, &flag);
if (flag) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: Intercommunicator cannot be passed to MPI_File_open\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_COMM, MPIR_ERR_COMM_INTER,
myname, (char *) 0, (char *) 0);
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
if ( ((amode&MPI_MODE_RDONLY)?1:0) + ((amode&MPI_MODE_RDWR)?1:0) +
((amode&MPI_MODE_WRONLY)?1:0) != 1 ) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: Exactly one of MPI_MODE_RDONLY, MPI_MODE_WRONLY, or MPI_MODE_RDWR must be specified\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_AMODE, 3,
myname, (char *) 0, (char *) 0);
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
if ((amode & MPI_MODE_RDONLY) &&
((amode & MPI_MODE_CREATE) || (amode & MPI_MODE_EXCL))) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: It is erroneous to specify MPI_MODE_CREATE or MPI_MODE_EXCL with MPI_MODE_RDONLY\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_AMODE, 5,
myname, (char *) 0, (char *) 0);
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
if ((amode & MPI_MODE_RDWR) && (amode & MPI_MODE_SEQUENTIAL)) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: It is erroneous to specify MPI_MODE_SEQUENTIAL with MPI_MODE_RDWR\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_AMODE, 7,
myname, (char *) 0, (char *) 0);
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
/* check if amode is the same on all processes */
MPI_Comm_dup(comm, &dupcomm);
tmp_amode = amode;
/*
Removed this check because broadcast is too expensive.
MPI_Bcast(&tmp_amode, 1, MPI_INT, 0, dupcomm);
if (amode != tmp_amode) {
FPRINTF(stderr, "MPI_File_open: amode must be the same on all processes\n");
MPI_Abort(MPI_COMM_WORLD, 1);
}
*/
/* check if ADIO has been initialized. If not, initialize it */
if (ADIO_Init_keyval == MPI_KEYVAL_INVALID) {
/* check if MPI itself has been initialized. If not, flag an error.
Can't initialize it here, because don't know argc, argv */
MPI_Initialized(&flag);
if (!flag) {
FPRINTF(stderr, "Error: MPI_Init() must be called before using MPI-IO\n");
MPI_Abort(MPI_COMM_WORLD, 1);
}
MPI_Keyval_create(MPI_NULL_COPY_FN, ADIOI_End_call, &ADIO_Init_keyval,
(void *) 0);
/* put a dummy attribute on MPI_COMM_WORLD, because we want the delete
function to be called when MPI_COMM_WORLD is freed. Hopefully the
MPI library frees MPI_COMM_WORLD when MPI_Finalize is called,
though the standard does not mandate this. */
MPI_Attr_put(MPI_COMM_WORLD, ADIO_Init_keyval, (void *) 0);
/* initialize ADIO */
ADIO_Init( (int *)0, (char ***)0, &error_code);
}
file_system = -1;
tmp = strchr(filename, ':');
#ifdef WIN32
// Unfortunately Windows uses ':' behind the drive letter.
// So we check if there is only one letter before the ':'
// Please do not use a single letter filesystem name!
if(tmp && ((tmp-filename) == 1)) tmp = 0;
#endif
if (!tmp) {
ADIO_FileSysType(filename, &file_system, &err);
if (err != MPI_SUCCESS) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: Can't determine the file-system type. Check the filename/path you provided and try again. Otherwise, prefix the filename with a string to indicate the type of file sytem (piofs:, pfs:, nfs:, ufs:, hfs:, xfs:, sfs:, pvfs:, svm:).\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ERR_NO_FSTYPE,
myname, (char *) 0, (char *) 0);
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
MPI_Allreduce(&file_system, &min_code, 1, MPI_INT, MPI_MIN, dupcomm);
if (min_code == ADIO_NFS) file_system = ADIO_NFS;
}
#ifndef PFS
if (!strncmp(filename, "pfs:", 4) || !strncmp(filename, "PFS:", 4) || (file_system == ADIO_PFS)) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: ROMIO has not been configured to use the PFS file system\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ERR_NO_PFS,
myname, (char *) 0, (char *) 0,"PFS");
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
#endif
#ifndef PIOFS
if (!strncmp(filename, "piofs:", 6) || !strncmp(filename, "PIOFS:", 6) || (file_system == ADIO_PIOFS)) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: ROMIO has not been configured to use the PIOFS file system\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ERR_NO_PIOFS,
myname, (char *) 0, (char *) 0,"PIOFS");
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
#endif
#ifndef UFS
if (!strncmp(filename, "ufs:", 4) || !strncmp(filename, "UFS:", 4) || (file_system == ADIO_UFS)) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: ROMIO has not been configured to use the UFS file system\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ERR_NO_UFS,
myname, (char *) 0, (char *) 0,"UFS");
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
#endif
#ifndef NFS
if (!strncmp(filename, "nfs:", 4) || !strncmp(filename, "NFS:", 4) || (file_system == ADIO_NFS)) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: ROMIO has not been configured to use the NFS file system\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ERR_NO_NFS,
myname, (char *) 0, (char *) 0,"NFS");
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
#endif
#ifndef HFS
if (!strncmp(filename, "hfs:", 4) || !strncmp(filename, "HFS:", 4) || (file_system == ADIO_HFS)) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: ROMIO has not been configured to use the HFS file system\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ERR_NO_HFS,
myname, (char *) 0, (char *) 0,"HFS");
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
#endif
#ifndef XFS
if (!strncmp(filename, "xfs:", 4) || !strncmp(filename, "XFS:", 4) || (file_system == ADIO_XFS)) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: ROMIO has not been configured to use the XFS file system\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ERR_NO_XFS,
myname, (char *) 0, (char *) 0,"XFS");
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
#endif
#ifndef SFS
if (!strncmp(filename, "sfs:", 4) || !strncmp(filename, "SFS:", 4) || (file_system == ADIO_SFS)) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: ROMIO has not been configured to use the SFS file system\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ERR_NO_SFS,
myname, (char *) 0, (char *) 0,"SFS");
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
#endif
#ifndef PVFS
if (!strncmp(filename, "pvfs:", 5) || !strncmp(filename, "PVFS:", 5) || (file_system == ADIO_PVFS)) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: ROMIO has not been configured to use the PVFS file system\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ERR_NO_PVFS,
myname, (char *) 0, (char *) 0,"PVFS");
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
#endif
#ifndef SVM
if (!strncmp(filename, "svm:", 4) || !strncmp(filename, "SVM:", 4) || (file_system == ADIO_SVM)) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: ROMIO has not been configured to use the SVM file system\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ERR_NO_SVM,
myname, (char *) 0, (char *) 0,"SVM");
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
#endif
#ifndef NTFS
if (!strncmp(filename, "svm:", 4) || !strncmp(filename, "NTFS:", 4) || (file_system == ADIO_SVM)) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: ROMIO has not been configured to use the SVM file system\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ERR_NO_NTFS,
myname, (char *) 0, (char *) 0,"NTFS");
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
#endif
if (!strncmp(filename, "pfs:", 4) || !strncmp(filename, "PFS:", 4)) {
file_system = ADIO_PFS;
filename += 4;
}
else if (!strncmp(filename, "piofs:", 6) || !strncmp(filename, "PIOFS:", 6)) {
file_system = ADIO_PIOFS;
filename += 6;
}
else if (!strncmp(filename, "ufs:", 4) || !strncmp(filename, "UFS:", 4)) {
file_system = ADIO_UFS;
filename += 4;
}
else if (!strncmp(filename, "nfs:", 4) || !strncmp(filename, "NFS:", 4)) {
file_system = ADIO_NFS;
filename += 4;
}
else if (!strncmp(filename, "hfs:", 4) || !strncmp(filename, "HFS:", 4)) {
file_system = ADIO_HFS;
filename += 4;
}
else if (!strncmp(filename, "xfs:", 4) || !strncmp(filename, "XFS:", 4)) {
file_system = ADIO_XFS;
filename += 4;
}
else if (!strncmp(filename, "sfs:", 4) || !strncmp(filename, "SFS:", 4)) {
file_system = ADIO_SFS;
filename += 4;
}
else if (!strncmp(filename, "pvfs:", 5) || !strncmp(filename, "PVFS:", 5)) {
file_system = ADIO_PVFS;
filename += 5;
}
else if (!strncmp(filename, "svm:", 4) || !strncmp(filename, "SVM:", 4)) {
file_system = ADIO_SVM;
filename += 4;
}
else if (!strncmp(filename, "ntfs:", 4) || !strncmp(filename, "NTFS:", 4)) {
file_system = ADIO_NTFS;
filename += 5;
}
if (((file_system == ADIO_PIOFS) || (file_system == ADIO_PVFS)) &&
(amode & MPI_MODE_SEQUENTIAL)) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_open: MPI_MODE_SEQUENTIAL not supported on PIOFS and PVFS\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_UNSUPPORTED_OPERATION,
MPIR_ERR_NO_MODE_SEQ, myname, (char *) 0, (char *) 0);
return ADIOI_Error(MPI_FILE_NULL, error_code, myname);
#endif
}
orig_amode = amode;
MPI_Comm_rank(dupcomm, &rank);
if ((amode & MPI_MODE_CREATE) && (amode & MPI_MODE_EXCL)) {
/* the open should fail if the file exists. Only process 0 should
check this. Otherwise, if all processes try to check and the file
does not exist, one process will create the file and others who
reach later will return error. */
if (!rank) {
MPI_Comm_dup(MPI_COMM_SELF, &dupcommself);
/* this dup is freed either in ADIO_Open if the open fails,
or in ADIO_Close */
*fh = ADIO_Open(dupcommself, filename, file_system, amode, 0,
MPI_BYTE, MPI_BYTE, M_ASYNC, info, ADIO_PERM_NULL, &error_code);
/* broadcast the error code to other processes */
MPI_Bcast(&error_code, 1, MPI_INT, 0, dupcomm);
/* if no error, close the file. It will be reopened normally
below. */
if (error_code == MPI_SUCCESS) ADIO_Close(*fh, &error_code);
}
else MPI_Bcast(&error_code, 1, MPI_INT, 0, dupcomm);
if (error_code != MPI_SUCCESS) {
MPI_Comm_free(&dupcomm);
*fh = MPI_FILE_NULL;
#ifdef MPI_hpux
HPMP_IO_OPEN_END(fl_xmpi, *fh, comm);
#endif /* MPI_hpux */
return error_code;
}
else amode = amode ^ MPI_MODE_EXCL; /* turn off MPI_MODE_EXCL */
}
/* use default values for disp, etype, filetype */
/* set iomode=M_ASYNC. It is used to implement the Intel PFS interface
on top of ADIO. Not relevant for MPI-IO implementation */
*fh = ADIO_Open(dupcomm, filename, file_system, amode, 0, MPI_BYTE,
MPI_BYTE, M_ASYNC, info, ADIO_PERM_NULL, &error_code);
/* if MPI_MODE_EXCL was removed, add it back */
if ((error_code == MPI_SUCCESS) && (amode != orig_amode))
(*fh)->access_mode = orig_amode;
/* determine name of file that will hold the shared file pointer */
/* can't support shared file pointers on a file system that doesn't
support file locking, e.g., PIOFS, PVFS */
if ((error_code == MPI_SUCCESS) && ((*fh)->file_system != ADIO_PIOFS)
&& ((*fh)->file_system != ADIO_PVFS)) {
ADIOI_Shfp_fname(*fh, rank);
/* if MPI_MODE_APPEND, set the shared file pointer to end of file.
indiv. file pointer already set to end of file in ADIO_Open.
Here file view is just bytes. */
if ((*fh)->access_mode & MPI_MODE_APPEND) {
if (!rank) ADIO_Set_shared_fp(*fh, (*fh)->fp_ind, &error_code);
MPI_Barrier(dupcomm);
}
}
#ifdef MPI_hpux
HPMP_IO_OPEN_END(fl_xmpi, *fh, comm);
#endif /* MPI_hpux */
return error_code;
}