--- /dev/null
+/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
+/*
+ * (C) 2001 by Argonne National Laboratory.
+ * See COPYRIGHT in top-level directory.
+ */
+#include "mpi.h"
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include "mpitest.h"
+
+/*
+static char MTEST_Descrip[] = "Test contig asynchronous I/O";
+*/
+
+#define DEFAULT_SIZE (65536)
+
+/* Uses asynchronous I/O. Each process writes to separate files and
+ reads them back. The file name is taken as a command-line argument,
+ and the process rank is appended to it.*/
+
+static void handle_error(int errcode, const char *str)
+{
+ char msg[MPI_MAX_ERROR_STRING];
+ int resultlen;
+ MPI_Error_string(errcode, msg, &resultlen);
+ fprintf(stderr, "%s: %s\n", str, msg);
+ MPI_Abort(MPI_COMM_WORLD, 1);
+}
+
+int main(int argc, char **argv)
+{
+ int *buf, i, rank, nints, len, err;
+ char *filename = 0, *tmp;
+ int errs = 0;
+ int SIZE = DEFAULT_SIZE;
+ MPI_File fh;
+ MPI_Status status;
+#ifdef MPIO_USES_MPI_REQUEST
+ MPI_Request request;
+#else
+ MPIO_Request request;
+#endif
+
+ MTest_Init(&argc, &argv);
+ MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+
+
+/* process 0 takes the file name as a command-line argument and
+ broadcasts it to other processes */
+ if (!rank) {
+ i = 1;
+ argv++;
+ /* Skip unrecognized arguments */
+ while (i < argc) {
+ if (strcmp(*argv, "-fname") == 0) {
+ argv++;
+ i++;
+ len = (int) strlen(*argv);
+ filename = (char *) malloc(len + 10);
+ MTEST_VG_MEM_INIT(filename, (len + 10) * sizeof(char));
+ strcpy(filename, *argv);
+ }
+ else if (strcmp(*argv, "-size") == 0) {
+ argv++;
+ i++;
+ SIZE = strtol(*argv, 0, 10);
+ if (errno) {
+ fprintf(stderr, "-size requires a numeric argument\n");
+ MPI_Abort(MPI_COMM_WORLD, 1);
+ }
+ else if (SIZE <= 0) {
+ fprintf(stderr, "-size requires a positive value\n");
+ }
+ }
+ else {
+ i++;
+ argv++;
+ }
+ }
+
+ if (!filename) {
+ /* Use a default filename of testfile */
+ len = 8;
+ filename = (char *) malloc(len + 10);
+ MTEST_VG_MEM_INIT(filename, (len + 10) * sizeof(char));
+ strcpy(filename, "/scratch/testfile");
+ }
+ MPI_Bcast(&len, 1, MPI_INT, 0, MPI_COMM_WORLD);
+ MPI_Bcast(filename, len + 10, MPI_CHAR, 0, MPI_COMM_WORLD);
+ MPI_Bcast(&SIZE, 1, MPI_INT, 0, MPI_COMM_WORLD);
+ }
+ else {
+ MPI_Bcast(&len, 1, MPI_INT, 0, MPI_COMM_WORLD);
+ filename = (char *) malloc(len + 10);
+ MPI_Bcast(filename, len + 10, MPI_CHAR, 0, MPI_COMM_WORLD);
+ MPI_Bcast(&SIZE, 1, MPI_INT, 0, MPI_COMM_WORLD);
+ }
+
+
+ /* printf("Starting (size=%d, file=%s)...\n", SIZE, filename); fflush(stdout); */
+
+ buf = (int *) malloc(SIZE);
+ nints = SIZE / sizeof(int);
+ for (i = 0; i < nints; i++)
+ buf[i] = rank * 100000 + i;
+
+ /* each process opens a separate file called filename.'myrank' */
+ tmp = (char *) malloc(len + 10);
+ strcpy(tmp, filename);
+ sprintf(filename, "%s.%d", tmp, rank);
+ free(tmp);
+
+ err = MPI_File_open(MPI_COMM_SELF, filename, MPI_MODE_CREATE | MPI_MODE_RDWR,
+ MPI_INFO_NULL, &fh);
+ if (err != MPI_SUCCESS)
+ handle_error(err, "MPI_File_open");
+
+ err = MPI_File_set_view(fh, 0, MPI_INT, MPI_INT, (char *) "native", MPI_INFO_NULL);
+ if (err != MPI_SUCCESS)
+ handle_error(err, "MPI_File_set_view");
+ err = MPI_File_iwrite(fh, buf, nints, MPI_INT, &request);
+ if (err != MPI_SUCCESS)
+ handle_error(err, "MPI_File_iwrtie");
+#ifdef MPIO_USES_MPI_REQUEST
+ MPI_Wait(&request, &status);
+#else
+ MPIO_Wait(&request, &status);
+#endif
+ MPI_File_close(&fh);
+
+ /* reopen the file and read the data back */
+
+ for (i = 0; i < nints; i++)
+ buf[i] = 0;
+ err = MPI_File_open(MPI_COMM_SELF, filename, MPI_MODE_CREATE | MPI_MODE_RDWR,
+ MPI_INFO_NULL, &fh);
+ if (err != MPI_SUCCESS)
+ handle_error(err, "MPI_File_open (read)");
+ err = MPI_File_set_view(fh, 0, MPI_INT, MPI_INT, (char *) "native", MPI_INFO_NULL);
+ if (err != MPI_SUCCESS)
+ handle_error(err, "MPI_File_set_view (read)");
+ err = MPI_File_iread(fh, buf, nints, MPI_INT, &request);
+ if (err != MPI_SUCCESS)
+ handle_error(err, "MPI_File_iread");
+#ifdef MPIO_USES_MPI_REQUEST
+ MPI_Wait(&request, &status);
+#else
+ MPIO_Wait(&request, &status);
+#endif
+ MPI_File_close(&fh);
+
+ /* check if the data read is correct */
+/* for (i = 0; i < nints; i++) {*/
+/* if (buf[i] != (rank * 100000 + i)) {*/
+/* errs++;*/
+/* if (errs < 25) {*/
+/* fprintf(stderr, "Process %d: error, read %d, should be %d\n", rank, buf[i],*/
+/* rank * 100000 + i);*/
+/* }*/
+/* else if (errs == 25) {*/
+/* fprintf(stderr, "Reached maximum number of errors to report\n");*/
+/* }*/
+/* }*/
+/* }*/
+
+ free(buf);
+ free(filename);
+
+ MTest_Finalize(errs);
+ MPI_Finalize();
+ return 0;
+}
