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MDEV-12353: Introduce mtr_t::zmemcpy()

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Exclusively write MLOG_ZIP_WRITE_STRING records by mtr_t::zmemcpy().
This commit is contained in:
Marko Mäkelä 2020-01-22 20:12:08 +02:00
commit 8a039ee107
6 changed files with 100 additions and 258 deletions
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25
storage/innobase/include/page0zip.ic
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@ -332,35 +332,14 @@ page_zip_write_header(
buf_block_t* block, /*!< in/out: compressed page */
const byte* str, /*!< in: address on the uncompressed page */
ulint length, /*!< in: length of the data */
mtr_t* mtr) /*!< in: mini-transaction, or NULL */
mtr_t* mtr) /*!< in/out: mini-transaction */
{
ut_ad(page_align(str) == block->frame);
const uint16_t pos = page_offset(str);
ut_ad(pos < PAGE_DATA);
ut_ad(pos + length < PAGE_DATA);
page_zip_des_t* page_zip = &block->page.zip;
ut_ad(page_zip_simple_validate(page_zip));
UNIV_MEM_ASSERT_RW(page_zip->data, page_zip_get_size(page_zip));
memcpy(page_zip->data + pos, str, length);
/* The following would fail in page_cur_insert_rec_zip(). */
/* ut_ad(page_zip_validate(page_zip, str - pos)); */
if (byte* log_ptr = mlog_open(mtr, 11 + 2 + 2 + length)) {
log_ptr = mlog_write_initial_log_record_low(
MLOG_ZIP_WRITE_STRING,
block->page.id.space(), block->page.id.page_no(),
log_ptr, mtr);
mach_write_to_2(log_ptr, pos);
mach_write_to_2(log_ptr + 2, length);
memcpy(log_ptr + 4, str, length);
mlog_close(mtr, log_ptr + 4 + length);
}
mtr->zmemcpy(&block->page, pos, str, length);
}
/**********************************************************************//**