diff options
Diffstat (limited to 'src/H5Dscatgath.c')
| -rw-r--r-- | src/H5Dscatgath.c | 567 |
1 files changed, 562 insertions, 5 deletions
diff --git a/src/H5Dscatgath.c b/src/H5Dscatgath.c index 2547bdc..802544c 100644 --- a/src/H5Dscatgath.c +++ b/src/H5Dscatgath.c @@ -31,6 +31,11 @@ /* Local Macros */ /****************/ +/* Macro to determine if we're using H5D__compound_opt_read() */ +#define H5D__SCATGATH_USE_CMPD_OPT_READ(DSET_INFO, PIECE_INFO) \ + ((DSET_INFO)->type_info.cmpd_subset && H5T_SUBSET_FALSE != (DSET_INFO)->type_info.cmpd_subset->subset && \ + !(PIECE_INFO)->in_place_tconv) + /******************/ /* Local Typedefs */ /******************/ @@ -529,7 +534,7 @@ H5D__scatgath_read(const H5D_io_info_t *io_info, const H5D_dset_io_info_t *dset_ } /* end if */ else { if (H5T_BKG_YES == dset_info->type_info.need_bkg) { - n = H5D__gather_mem(buf, bkg_iter, smine_nelmts, dset_info->type_info.bkg_buf /*out*/); + n = H5D__gather_mem(buf, bkg_iter, smine_nelmts, io_info->bkg_buf /*out*/); if (n != smine_nelmts) HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "mem gather failed") } /* end if */ @@ -539,7 +544,7 @@ H5D__scatgath_read(const H5D_io_info_t *io_info, const H5D_dset_io_info_t *dset_ */ if (H5T_convert(dset_info->type_info.tpath, dset_info->type_info.src_type_id, dset_info->type_info.dst_type_id, smine_nelmts, (size_t)0, (size_t)0, - io_info->tconv_buf, dset_info->type_info.bkg_buf) < 0) + io_info->tconv_buf, io_info->bkg_buf) < 0) HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "datatype conversion failed") /* Do the data transform after the conversion (since we're using type mem_type) */ @@ -672,8 +677,7 @@ H5D__scatgath_write(const H5D_io_info_t *io_info, const H5D_dset_io_info_t *dset } /* end if */ else { if (H5T_BKG_YES == dset_info->type_info.need_bkg) { - n = H5D__gather_file(io_info, dset_info, bkg_iter, smine_nelmts, - dset_info->type_info.bkg_buf /*out*/); + n = H5D__gather_file(io_info, dset_info, bkg_iter, smine_nelmts, io_info->bkg_buf /*out*/); if (n != smine_nelmts) HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "file gather failed") } /* end if */ @@ -697,7 +701,7 @@ H5D__scatgath_write(const H5D_io_info_t *io_info, const H5D_dset_io_info_t *dset */ if (H5T_convert(dset_info->type_info.tpath, dset_info->type_info.src_type_id, dset_info->type_info.dst_type_id, smine_nelmts, (size_t)0, (size_t)0, - io_info->tconv_buf, dset_info->type_info.bkg_buf) < 0) + io_info->tconv_buf, io_info->bkg_buf) < 0) HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "datatype conversion failed") } /* end else */ @@ -727,6 +731,559 @@ done: } /* end H5D__scatgath_write() */ /*------------------------------------------------------------------------- + * Function: H5D__scatgath_read_select + * + * Purpose: Perform scatter/gather read from a list of dataset pieces + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5D__scatgath_read_select(H5D_io_info_t *io_info) +{ + H5S_t **tmp_mem_spaces = NULL; /* Memory spaces to use for read from disk */ + H5S_sel_iter_t *mem_iter = NULL; /* Memory selection iteration info */ + hbool_t mem_iter_init = FALSE; /* Memory selection iteration info has been initialized */ + void **tmp_bufs = NULL; /* Buffers to use for read from disk */ + void *tmp_bkg_buf = NULL; /* Temporary background buffer pointer */ + size_t tconv_bytes_used = 0; /* Number of bytes used so far in conversion buffer */ + size_t bkg_bytes_used = 0; /* Number of bytes used so far in background buffer */ + size_t i; /* Local index variable */ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_PACKAGE + + /* Sanity check */ + HDassert(io_info); + HDassert(io_info->count > 0); + HDassert(io_info->mem_spaces || io_info->pieces_added == 0); + HDassert(io_info->file_spaces || io_info->pieces_added == 0); + HDassert(io_info->addrs || io_info->pieces_added == 0); + HDassert(io_info->element_sizes || io_info->pieces_added == 0); + HDassert(io_info->rbufs || io_info->pieces_added == 0); + + /* Allocate list of buffers (within the tconv buf) */ + if (NULL == (tmp_bufs = H5MM_malloc(io_info->pieces_added * sizeof(void *)))) + HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "memory allocation failed for temporary buffer list") + + /* Allocate the iterator */ + if (NULL == (mem_iter = H5FL_MALLOC(H5S_sel_iter_t))) + HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "can't allocate memory iterator") + + /* Allocate list of block memory spaces */ + /*!FIXME delay doing this until we find the first mem space that is non-contiguous or doesn't start at 0 + */ + if (NULL == (tmp_mem_spaces = H5MM_malloc(io_info->pieces_added * sizeof(H5S_t *)))) + HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, + "memory allocation failed for temporary memory space list") + + /* Build read operation to tconv buffer */ + for (i = 0; i < io_info->pieces_added; i++) { + H5D_dset_io_info_t *dset_info = io_info->sel_pieces[i]->dset_info; + + HDassert(io_info->sel_pieces[i]->piece_points > 0); + + /* Check if this piece is involved in type conversion */ + if (dset_info->type_info.is_xform_noop && dset_info->type_info.is_conv_noop) { + /* No type conversion, just copy the mem space and buffer */ + tmp_mem_spaces[i] = io_info->mem_spaces[i]; + tmp_bufs[i] = io_info->rbufs[i]; + } + else { + /* Create block memory space */ + if (NULL == + (tmp_mem_spaces[i] = H5S_create_simple(1, &io_info->sel_pieces[i]->piece_points, NULL))) { + HDmemset(&tmp_mem_spaces[i], 0, (io_info->pieces_added - i) * sizeof(tmp_mem_spaces[0])); + HGOTO_ERROR(H5E_DATASET, H5E_CANTCREATE, FAIL, "unable to create simple memory dataspace") + } + + /* Check for in-place type conversion */ + if (io_info->sel_pieces[i]->in_place_tconv) + /* Set buffer to point to read buffer + offset */ + tmp_bufs[i] = (uint8_t *)(io_info->rbufs[i]) + io_info->sel_pieces[i]->buf_off; + else { + /* Set buffer to point into type conversion buffer */ + tmp_bufs[i] = io_info->tconv_buf + tconv_bytes_used; + tconv_bytes_used += + io_info->sel_pieces[i]->piece_points * + MAX(dset_info->type_info.src_type_size, dset_info->type_info.dst_type_size); + HDassert(tconv_bytes_used <= io_info->tconv_buf_size); + } + + /* Fill background buffer here unless we will use H5D__compound_opt_read(). Must do this before + * the read so the read buffer doesn't get wiped out if we're using in-place type conversion */ + if (!H5D__SCATGATH_USE_CMPD_OPT_READ(dset_info, io_info->sel_pieces[i])) { + /* Check for background buffer */ + if (dset_info->type_info.need_bkg) { + HDassert(io_info->bkg_buf); + + /* Calculate background buffer position */ + tmp_bkg_buf = io_info->bkg_buf + bkg_bytes_used; + bkg_bytes_used += + io_info->sel_pieces[i]->piece_points * dset_info->type_info.dst_type_size; + HDassert(bkg_bytes_used <= io_info->bkg_buf_size); + + /* Gather data from read buffer to background buffer if necessary */ + if (H5T_BKG_YES == dset_info->type_info.need_bkg) { + /* Initialize memory iterator */ + HDassert(!mem_iter_init); + if (H5S_select_iter_init(mem_iter, io_info->mem_spaces[i], + dset_info->type_info.dst_type_size, 0) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, + "unable to initialize memory selection information") + mem_iter_init = TRUE; /* Memory selection iteration info has been initialized */ + + if ((size_t)io_info->sel_pieces[i]->piece_points != + H5D__gather_mem(io_info->rbufs[i], mem_iter, + (size_t)io_info->sel_pieces[i]->piece_points, + tmp_bkg_buf /*out*/)) + HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "mem gather failed") + + /* Reset selection iterator */ + HDassert(mem_iter_init); + if (H5S_SELECT_ITER_RELEASE(mem_iter) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "Can't release selection iterator") + mem_iter_init = FALSE; + } + } + } + } + } + + /* Read data from all pieces */ + H5_CHECK_OVERFLOW(io_info->pieces_added, size_t, uint32_t) + if (H5F_shared_select_read(io_info->f_sh, H5FD_MEM_DRAW, (uint32_t)io_info->pieces_added, tmp_mem_spaces, + io_info->file_spaces, io_info->addrs, io_info->element_sizes, tmp_bufs) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "selection read failed") + + /* Reset bkg_bytes_used */ + bkg_bytes_used = 0; + + /* Perform type conversion and scatter data to memory buffers for datasets that need this */ + for (i = 0; i < io_info->pieces_added; i++) { + H5D_dset_io_info_t *dset_info = io_info->sel_pieces[i]->dset_info; + + HDassert(tmp_mem_spaces[i]); + + /* Check if this piece is involved in type conversion */ + if (tmp_mem_spaces[i] != io_info->mem_spaces[i]) { + H5_CHECK_OVERFLOW(io_info->sel_pieces[i]->piece_points, hsize_t, size_t); + + /* Initialize memory iterator */ + HDassert(!mem_iter_init); + if (H5S_select_iter_init(mem_iter, io_info->mem_spaces[i], dset_info->type_info.dst_type_size, + 0) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, + "unable to initialize memory selection information") + mem_iter_init = TRUE; /* Memory selection iteration info has been initialized */ + + /* If the source and destination are compound types and subset of each other + * and no conversion is needed, copy the data directly into user's buffer and + * bypass the rest of steps. + */ + if (H5D__SCATGATH_USE_CMPD_OPT_READ(dset_info, io_info->sel_pieces[i])) { + if (H5D__compound_opt_read((size_t)io_info->sel_pieces[i]->piece_points, mem_iter, + &dset_info->type_info, tmp_bufs[i], io_info->rbufs[i] /*out*/) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "datatype conversion failed") + } + else { + /* Check for background buffer */ + if (dset_info->type_info.need_bkg) { + HDassert(io_info->bkg_buf); + + /* Calculate background buffer position */ + tmp_bkg_buf = io_info->bkg_buf + bkg_bytes_used; + bkg_bytes_used += + io_info->sel_pieces[i]->piece_points * dset_info->type_info.dst_type_size; + HDassert(bkg_bytes_used <= io_info->bkg_buf_size); + } + + /* + * Perform datatype conversion. + */ + if (H5T_convert(dset_info->type_info.tpath, dset_info->type_info.src_type_id, + dset_info->type_info.dst_type_id, + (size_t)io_info->sel_pieces[i]->piece_points, (size_t)0, (size_t)0, + tmp_bufs[i], tmp_bkg_buf) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "datatype conversion failed") + + /* Do the data transform after the conversion (since we're using type mem_type) */ + if (!dset_info->type_info.is_xform_noop) { + H5Z_data_xform_t *data_transform; /* Data transform info */ + + /* Retrieve info from API context */ + if (H5CX_get_data_transform(&data_transform) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get data transform info") + + if (H5Z_xform_eval(data_transform, tmp_bufs[i], + (size_t)io_info->sel_pieces[i]->piece_points, + dset_info->type_info.mem_type) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "Error performing data transform") + } + + /* Scatter the data into memory if this was not an in-place conversion */ + if (!io_info->sel_pieces[i]->in_place_tconv) + if (H5D__scatter_mem(tmp_bufs[i], mem_iter, (size_t)io_info->sel_pieces[i]->piece_points, + io_info->rbufs[i] /*out*/) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "scatter failed") + } + + /* Release selection iterator */ + HDassert(mem_iter_init); + if (H5S_SELECT_ITER_RELEASE(mem_iter) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "Can't release selection iterator") + mem_iter_init = FALSE; + } + } + +done: + /* Release and free selection iterator */ + if (mem_iter_init && H5S_SELECT_ITER_RELEASE(mem_iter) < 0) + HDONE_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "Can't release selection iterator") + if (mem_iter) + mem_iter = H5FL_FREE(H5S_sel_iter_t, mem_iter); + + /* Free tmp_bufs */ + H5MM_free(tmp_bufs); + tmp_bufs = NULL; + + /* Clear and free tmp_mem_spaces */ + if (tmp_mem_spaces) { + for (i = 0; i < io_info->pieces_added; i++) + if (tmp_mem_spaces[i] != io_info->mem_spaces[i] && tmp_mem_spaces[i] && + H5S_close(tmp_mem_spaces[i]) < 0) + HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "Can't close dataspace") + H5MM_free(tmp_mem_spaces); + tmp_mem_spaces = NULL; + } + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5D__scatgath_read_select() */ + +/*------------------------------------------------------------------------- + * Function: H5D__scatgath_write_select + * + * Purpose: Perform scatter/gather write to a list of dataset pieces. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +herr_t +H5D__scatgath_write_select(H5D_io_info_t *io_info) +{ + H5S_t **write_mem_spaces = NULL; /* Memory spaces to use for write to disk */ + size_t spaces_added = 0; /* Number of spaces added to write_mem_spaces */ + H5S_sel_iter_t *mem_iter = NULL; /* Memory selection iteration info */ + hbool_t mem_iter_init = FALSE; /* Memory selection iteration info has been initialized */ + const void **write_bufs = NULL; /* Buffers to use for write to disk */ + size_t tconv_bytes_used = 0; /* Number of bytes used so far in conversion buffer */ + size_t bkg_bytes_used = 0; /* Number of bytes used so far in background buffer */ + H5S_t **bkg_mem_spaces = NULL; /* Array of memory spaces for read to background buffer */ + H5S_t **bkg_file_spaces = NULL; /* Array of file spaces for read to background buffer */ + haddr_t *bkg_addrs = NULL; /* Array of file addresses for read to background buffer */ + size_t *bkg_element_sizes = NULL; /* Array of element sizes for read to background buffer */ + void **bkg_bufs = NULL; /* Array background buffers for read of existing file contents */ + size_t bkg_pieces = 0; /* Number of pieces that need to read the background data from disk */ + size_t i; /* Local index variable */ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_PACKAGE + + /* Sanity check */ + HDassert(io_info); + HDassert(io_info->count > 0); + HDassert(io_info->mem_spaces || io_info->pieces_added == 0); + HDassert(io_info->file_spaces || io_info->pieces_added == 0); + HDassert(io_info->addrs || io_info->pieces_added == 0); + HDassert(io_info->element_sizes || io_info->pieces_added == 0); + HDassert(io_info->wbufs || io_info->pieces_added == 0); + + /* Allocate list of buffers (within the tconv buf) */ + if (NULL == (write_bufs = (const void **)H5MM_malloc(io_info->pieces_added * sizeof(const void *)))) + HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "memory allocation failed for temporary buffer list") + + /* Allocate the iterator */ + if (NULL == (mem_iter = H5FL_MALLOC(H5S_sel_iter_t))) + HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "can't allocate memory iterator") + + /* Allocate list of block memory spaces */ + /*!FIXME delay doing this until we find the first mem space that is non-contiguous or doesn't start at 0 + */ + if (NULL == (write_mem_spaces = H5MM_malloc(io_info->pieces_added * sizeof(H5S_t *)))) + HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, + "memory allocation failed for temporary memory space list") + + /* Build operations to read data to background buffer and to write data */ + for (i = 0; i < io_info->pieces_added; i++) { + H5D_dset_io_info_t *dset_info = io_info->sel_pieces[i]->dset_info; + + HDassert(io_info->sel_pieces[i]->piece_points > 0); + + /* Check if this piece is involved in type conversion */ + if (dset_info->type_info.is_xform_noop && dset_info->type_info.is_conv_noop) { + /* No type conversion, just copy the mem space and buffer */ + write_mem_spaces[i] = io_info->mem_spaces[i]; + spaces_added++; + write_bufs[i] = io_info->wbufs[i]; + } + else { + void *tmp_write_buf; /* To sidestep const warnings */ + void *tmp_bkg_buf = NULL; + + H5_CHECK_OVERFLOW(io_info->sel_pieces[i]->piece_points, hsize_t, size_t); + + /* Initialize memory iterator */ + HDassert(!mem_iter_init); + if (H5S_select_iter_init(mem_iter, io_info->mem_spaces[i], dset_info->type_info.src_type_size, + 0) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, + "unable to initialize memory selection information") + mem_iter_init = TRUE; /* Memory selection iteration info has been initialized */ + + /* Create block memory space */ + if (NULL == + (write_mem_spaces[i] = H5S_create_simple(1, &io_info->sel_pieces[i]->piece_points, NULL))) + HGOTO_ERROR(H5E_DATASET, H5E_CANTCREATE, FAIL, "unable to create simple memory dataspace") + spaces_added++; + + /* Check for in-place type conversion */ + if (io_info->sel_pieces[i]->in_place_tconv) { + H5_flexible_const_ptr_t flex_buf; + + /* Set buffer to point to write buffer + offset */ + /* Use cast to union to twiddle away const. OK because if we're doing this it means the user + * explicitly allowed us to modify this buffer via H5Pset_modify_write_buf(). */ + flex_buf.cvp = io_info->wbufs[i]; + tmp_write_buf = (uint8_t *)flex_buf.vp + io_info->sel_pieces[i]->buf_off; + } + else { + /* Set buffer to point into type conversion buffer */ + tmp_write_buf = io_info->tconv_buf + tconv_bytes_used; + tconv_bytes_used += + io_info->sel_pieces[i]->piece_points * + MAX(dset_info->type_info.src_type_size, dset_info->type_info.dst_type_size); + HDassert(tconv_bytes_used <= io_info->tconv_buf_size); + + /* Gather data from application buffer into the datatype conversion buffer */ + if ((size_t)io_info->sel_pieces[i]->piece_points != + H5D__gather_mem(io_info->wbufs[i], mem_iter, (size_t)io_info->sel_pieces[i]->piece_points, + tmp_write_buf /*out*/)) + HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "mem gather failed") + } + + /* Set buffer for writing to disk (from type conversion buffer) */ + write_bufs[i] = (const void *)tmp_write_buf; + + /* If the source and destination are compound types and the destination is a subset of + * the source and no conversion is needed, copy the data directly into the type + * conversion buffer and bypass the rest of steps. If the source is a subset of the + * destination, the optimization is done in conversion function H5T_conv_struct_opt to + * protect the background data. + */ + if (dset_info->type_info.cmpd_subset && + H5T_SUBSET_DST == dset_info->type_info.cmpd_subset->subset && + dset_info->type_info.dst_type_size == dset_info->type_info.cmpd_subset->copy_size && + !io_info->sel_pieces[i]->in_place_tconv) { + if (H5D__compound_opt_write((size_t)io_info->sel_pieces[i]->piece_points, + &dset_info->type_info, tmp_write_buf) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "datatype conversion failed") + + /* No background buffer necessary, prevent this element from being considered in the second + * loop */ + /* Add this to H5Tconv.c? -NAF */ + dset_info->type_info.need_bkg = H5T_BKG_NO; + } /* end if */ + else { + /* Check for background buffer */ + if (dset_info->type_info.need_bkg) { + HDassert(io_info->bkg_buf); + + /* Calculate background buffer position */ + tmp_bkg_buf = io_info->bkg_buf + bkg_bytes_used; + bkg_bytes_used += + io_info->sel_pieces[i]->piece_points * dset_info->type_info.dst_type_size; + HDassert(bkg_bytes_used <= io_info->bkg_buf_size); + } + + /* Set up background buffer read operation if necessary */ + if (H5T_BKG_YES == dset_info->type_info.need_bkg) { + HDassert(io_info->must_fill_bkg); + + /* Allocate arrays of parameters for selection read to background buffer if necessary */ + if (!bkg_mem_spaces) { + HDassert(!bkg_file_spaces && !bkg_addrs && !bkg_element_sizes && !bkg_bufs); + if (NULL == (bkg_mem_spaces = H5MM_malloc(io_info->pieces_added * sizeof(H5S_t *)))) + HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, + "memory allocation failed for memory space list") + if (NULL == (bkg_file_spaces = H5MM_malloc(io_info->pieces_added * sizeof(H5S_t *)))) + HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, + "memory allocation failed for file space list") + if (NULL == (bkg_addrs = H5MM_malloc(io_info->pieces_added * sizeof(haddr_t)))) + HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, + "memory allocation failed for piece address list") + if (NULL == (bkg_element_sizes = H5MM_malloc(io_info->pieces_added * sizeof(size_t)))) + HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, + "memory allocation failed for element size list") + if (NULL == (bkg_bufs = H5MM_malloc(io_info->pieces_added * sizeof(const void *)))) + HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, + "memory allocation failed for write buffer list") + } + + /* Use same (block) memory space, file space, address, and element size as write operation + */ + HDassert(bkg_mem_spaces && bkg_file_spaces && bkg_addrs && bkg_element_sizes && bkg_bufs); + bkg_mem_spaces[bkg_pieces] = write_mem_spaces[i]; + bkg_file_spaces[bkg_pieces] = io_info->file_spaces[i]; + bkg_addrs[bkg_pieces] = io_info->addrs[i]; + bkg_element_sizes[bkg_pieces] = io_info->element_sizes[i]; + + /* Use previously calculated background buffer position */ + bkg_bufs[bkg_pieces] = tmp_bkg_buf; + + /* Add piece */ + bkg_pieces++; + } + else { + /* Perform type conversion here to avoid second loop if no dsets use the background buffer + */ + /* Do the data transform before the type conversion (since + * transforms must be done in the memory type). */ + if (!dset_info->type_info.is_xform_noop) { + H5Z_data_xform_t *data_transform; /* Data transform info */ + + /* Retrieve info from API context */ + if (H5CX_get_data_transform(&data_transform) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get data transform info") + + if (H5Z_xform_eval(data_transform, tmp_write_buf, + (size_t)io_info->sel_pieces[i]->piece_points, + dset_info->type_info.mem_type) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "Error performing data transform") + } + + /* + * Perform datatype conversion. + */ + if (H5T_convert(dset_info->type_info.tpath, dset_info->type_info.src_type_id, + dset_info->type_info.dst_type_id, + (size_t)io_info->sel_pieces[i]->piece_points, (size_t)0, (size_t)0, + tmp_write_buf, tmp_bkg_buf) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "datatype conversion failed") + } + } + + /* Release selection iterator */ + HDassert(mem_iter_init); + if (H5S_SELECT_ITER_RELEASE(mem_iter) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "Can't release selection iterator") + mem_iter_init = FALSE; + } + } + + HDassert(spaces_added == io_info->pieces_added); + + /* Gather data to background buffer if necessary */ + if (io_info->must_fill_bkg) { + size_t j = 0; /* Index into array of background buffers */ + + /* Read data */ + H5_CHECK_OVERFLOW(bkg_pieces, size_t, uint32_t) + if (H5F_shared_select_read(io_info->f_sh, H5FD_MEM_DRAW, (uint32_t)bkg_pieces, bkg_mem_spaces, + bkg_file_spaces, bkg_addrs, bkg_element_sizes, bkg_bufs) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "selection read to background buffer failed") + + /* Perform type conversion on pieces with background buffers that were just read */ + for (i = 0; i < io_info->pieces_added; i++) { + H5D_dset_io_info_t *dset_info = io_info->sel_pieces[i]->dset_info; + + if (H5T_BKG_YES == dset_info->type_info.need_bkg) { + /* Non-const write_buf[i]. Use pointer math here to avoid const warnings. When + * there's a background buffer write_buf[i] always points inside the non-const tconv + * buf so this is OK. */ + void *tmp_write_buf = + (void *)((uint8_t *)io_info->tconv_buf + + ((const uint8_t *)write_bufs[i] - (const uint8_t *)io_info->tconv_buf)); + + /* Do the data transform before the type conversion (since + * transforms must be done in the memory type). */ + if (!dset_info->type_info.is_xform_noop) { + H5Z_data_xform_t *data_transform; /* Data transform info */ + + /* Retrieve info from API context */ + if (H5CX_get_data_transform(&data_transform) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get data transform info") + + if (H5Z_xform_eval(data_transform, tmp_write_buf, + (size_t)io_info->sel_pieces[i]->piece_points, + dset_info->type_info.mem_type) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "Error performing data transform") + } + + /* + * Perform datatype conversion. + */ + HDassert(j < bkg_pieces); + if (H5T_convert(dset_info->type_info.tpath, dset_info->type_info.src_type_id, + dset_info->type_info.dst_type_id, + (size_t)io_info->sel_pieces[i]->piece_points, (size_t)0, (size_t)0, + tmp_write_buf, bkg_bufs[j]) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "datatype conversion failed") + + /* Advance to next background buffer */ + j++; + } + } + + HDassert(j == bkg_pieces); + } + + /* Write data to disk */ + H5_CHECK_OVERFLOW(io_info->pieces_added, size_t, uint32_t) + if (H5F_shared_select_write(io_info->f_sh, H5FD_MEM_DRAW, (uint32_t)io_info->pieces_added, + write_mem_spaces, io_info->file_spaces, io_info->addrs, + io_info->element_sizes, write_bufs) < 0) + HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "selection write failed") + +done: + /* Release and free selection iterator */ + if (mem_iter_init && H5S_SELECT_ITER_RELEASE(mem_iter) < 0) + HDONE_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "Can't release selection iterator") + if (mem_iter) + mem_iter = H5FL_FREE(H5S_sel_iter_t, mem_iter); + + /* Free write_bufs */ + H5MM_free(write_bufs); + write_bufs = NULL; + + /* Clear and free write_mem_spaces */ + if (write_mem_spaces) { + for (i = 0; i < spaces_added; i++) { + HDassert(write_mem_spaces[i]); + if (write_mem_spaces[i] != io_info->mem_spaces[i] && H5S_close(write_mem_spaces[i]) < 0) + HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "Can't close dataspace") + } + H5MM_free(write_mem_spaces); + write_mem_spaces = NULL; + } + + /* Free bakcground buffer parameter arrays */ + H5MM_free(bkg_mem_spaces); + bkg_mem_spaces = NULL; + H5MM_free(bkg_file_spaces); + bkg_file_spaces = NULL; + H5MM_free(bkg_addrs); + bkg_addrs = NULL; + H5MM_free(bkg_element_sizes); + bkg_element_sizes = NULL; + H5MM_free(bkg_bufs); + bkg_bufs = NULL; + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5D__scatgath_write_select() */ + +/*------------------------------------------------------------------------- * Function: H5D__compound_opt_read * * Purpose: A special optimization case when the source and |