Man page - pmemblk_read(3)

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Package: libpmemblk-dev
apt-get install libpmemblk-dev

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libpmemblk-dev

Manual

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
SEE ALSO

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.