1 files changed, 126 insertions, 0 deletions
diff --git a/examples/h5rados_dset_open.c b/examples/h5rados_dset_open.c
new file mode 100644
index 0000000..19e29ed
--- /dev/null
+++ b/examples/h5rados_dset_open.c
@@ -0,0 +1,126 @@
+#include "h5rados_example.h"
+
+int main(int argc, char *argv[]) {
+    rados_t cluster;
+    char *pool = "mypool";
+    hid_t file = -1, dset = -1, fapl = -1, space = -1, type = -1, dcpl = -1, dapl = -1, def_dcpl = -1, def_dapl = -1;
+    int ndims;
+    hsize_t dims[2];
+    htri_t tri_ret;
+
+    (void)MPI_Init(&argc, &argv);
+
+    if(argc != 3)
+        PRINTF_ERROR("argc != 3\n");
+
+    if(rados_create(&cluster, NULL) < 0)
+        ERROR;
+    if(rados_conf_read_file(cluster, "ceph.conf") < 0)
+        ERROR;
+
+    /* Initialize VOL */
+    if(H5VLrados_init(cluster, pool) < 0)
+        ERROR;
+
+    /* Set up FAPL */
+    if((fapl = H5Pcreate(H5P_FILE_ACCESS)) < 0)
+        ERROR;
+    if(H5Pset_fapl_rados(fapl, MPI_COMM_WORLD, MPI_INFO_NULL) < 0)
+        ERROR;
+    if(H5Pset_all_coll_metadata_ops(fapl, true) < 0)
+        ERROR;
+
+    /* Open file */
+    if((file = H5Fopen(argv[1], H5F_ACC_RDONLY, fapl)) < 0)
+        ERROR;
+
+    printf("Opening dataset\n");
+
+    /* Open dataset */
+    if((dset = H5Dopen2(file, argv[2], H5P_DEFAULT)) < 0)
+        ERROR;
+
+    /* Check dataset dataspace */
+    if((space = H5Dget_space(dset)) < 0)
+        ERROR;
+    if((ndims = H5Sget_simple_extent_ndims(space)) < 0)
+        ERROR;
+    if(ndims != 2)
+        PRINTF_ERROR("ndims == %d, expected 2\n", ndims);
+    if(H5Sget_simple_extent_dims(space, dims, NULL) < 0)
+        ERROR;
+    if(dims[0] != 4)
+        PRINTF_ERROR("dims[0] == %d, expected 4\n", (int)dims[0]);
+    if(dims[1] != 6)
+        PRINTF_ERROR("dims[1] == %d, expected 6\n", (int)dims[1]);
+
+    /* Check dataset datatype */
+    if((type = H5Dget_type(dset)) < 0)
+        ERROR;
+    if((tri_ret = H5Tequal(type, H5T_NATIVE_INT)) < 0)
+        ERROR;
+    if(!tri_ret)
+        PRINTF_ERROR("datatype does not equal H5T_NATIVE_INT\n");
+
+    /* Check DCPL */
+    if((dcpl = H5Dget_create_plist(dset)) < 0)
+        ERROR;
+    if((def_dcpl = H5Pcreate(H5P_DATASET_CREATE)) < 0)
+        ERROR;
+    if((tri_ret = H5Pequal(dcpl, def_dcpl)) < 0)
+        ERROR;
+    if(!tri_ret)
+        PRINTF_ERROR("DCPL does not equal default\n");
+
+    /* Check DAPL */
+    if((dapl = H5Dget_access_plist(dset)) < 0)
+        ERROR;
+    if((def_dapl = H5Pcreate(H5P_DATASET_ACCESS)) < 0)
+        ERROR;
+    if((tri_ret = H5Pequal(dapl, def_dapl)) < 0)
+        ERROR;
+    if(!tri_ret)
+        PRINTF_ERROR("DAPL does not equal default\n");
+
+    /* Close */
+    if(H5Dclose(dset) < 0)
+        ERROR;
+    if(H5Fclose(file) < 0)
+        ERROR;
+    if(H5Pclose(fapl) < 0)
+        ERROR;
+    if(H5Sclose(space) < 0)
+        ERROR;
+    if(H5Tclose(type) < 0)
+        ERROR;
+    if(H5Pclose(dcpl) < 0)
+        ERROR;
+    if(H5Pclose(dapl) < 0)
+        ERROR;
+    if(H5Pclose(def_dcpl) < 0)
+        ERROR;
+    if(H5Pclose(def_dapl) < 0)
+        ERROR;
+
+    printf("Success\n");
+
+    (void)MPI_Finalize();
+    return 0;
+
+error:
+    H5E_BEGIN_TRY {
+        H5Dclose(dset);
+        H5Fclose(file);
+        H5Pclose(fapl);
+        H5Sclose(space);
+        H5Tclose(type);
+        H5Pclose(dcpl);
+        H5Pclose(dapl);
+        H5Pclose(def_dcpl);
+        H5Pclose(def_dapl);
+    } H5E_END_TRY;
+
+    (void)MPI_Finalize();
+    return 1;
+}
+