NAME

       pmemblk_read()(DEPRECATED), pmemblk_write()(DEPRECATED) - read or write a block from a block memory pool

SYNOPSIS

              #include <libpmemblk.h>

              int pmemblk_read(PMEMblkpool *pbp, void *buf, long long blockno);
              int pmemblk_write(PMEMblkpool *pbp, const void *buf, long long blockno);

DESCRIPTION

       The  pmemblk_read()  function  reads  the  block  with block number blockno from memory pool pbp into the
       buffer buf.  Reading a block that has never been written  by  pmemblk_write()  will  return  a  block  of
       zeroes.

       The pmemblk_write() function writes a block from buf to block number blockno in the memory pool pbp.  The
       write is atomic with respect to other reads and writes.  In addition, the write cannot be torn by program
       failure  or  system  crash; on recovery the block is guaranteed to contain either the old data or the new
       data, never a mixture of both.

RETURN VALUE

       On success, the pmemblk_read() and pmemblk_write() functions return 0.  On error, they return -1 and  set
       errno appropriately.

SEE ALSO

       libpmemblk(7) and <https://pmem.io>