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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
*
* Copyright (C) 1997 University of Chicago.
* See COPYRIGHT notice in top-level directory.
*/
#include "ad_pfs.h"
void ADIOI_PFS_IreadContig(ADIO_File fd, void *buf, int count,
MPI_Datatype datatype, int file_ptr_type,
ADIO_Offset offset, ADIO_Request *request,
int *error_code)
{
long *id_sys;
int err=-1;
MPI_Count len, typesize;
ADIO_Offset off;
static char myname[] = "ADIOI_PFS_IREADCONTIG";
*request = ADIOI_Malloc_request();
(*request)->optype = ADIOI_READ;
(*request)->fd = fd;
(*request)->datatype = datatype;
MPI_Type_size_x(datatype, &typesize);
len = count * typesize;
id_sys = (long *) ADIOI_Malloc(sizeof(long));
(*request)->handle = (void *) id_sys;
off = (file_ptr_type == ADIO_INDIVIDUAL) ? fd->fp_ind : offset;
lseek(fd->fd_sys, off, SEEK_SET);
*id_sys = _iread(fd->fd_sys, buf, len);
if ((*id_sys == -1) && (errno == EQNOMID)) {
/* the man pages say EMREQUEST, but in reality errno is set to EQNOMID! */
/* exceeded the max. no. of outstanding requests. */
/* complete all previous async. requests */
/*ADIOI_Complete_async(error_code); */
if (*error_code != MPI_SUCCESS) return;
/* try again */
*id_sys = _iread(fd->fd_sys, buf, len);
if ((*id_sys == -1) && (errno == EQNOMID)) {
*error_code = MPIO_Err_create_code(MPI_SUCCESS,
MPIR_ERR_RECOVERABLE, myname,
__LINE__, MPI_ERR_IO, "**io",
"**io %s", strerror(errno));
return;
}
}
else if (*id_sys == -1) {
*error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
myname, __LINE__, MPI_ERR_IO,
"**io",
"**io %s", strerror(errno));
return;
}
if (file_ptr_type == ADIO_INDIVIDUAL) fd->fp_ind += len;
(*request)->queued = 1;
(*request)->nbytes = len;
ADIOI_Add_req_to_list(request);
fd->async_count++;
fd->fp_sys_posn = -1; /* set it to null. */
if (*id_sys == -1) {
*error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
myname, __LINE__, MPI_ERR_IO,
"**io",
"**io %s", strerror(errno));
}
else *error_code = MPI_SUCCESS;
}
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