iofunc_sync()

Indicate if synchronization is needed

Synopsis:

#include <sys/iofunc.h>

int iofunc_sync( resmgr_context_t* ctp, 
                 iofunc_ocb_t* ocb, 
                 int ioflag );

Arguments:

ctp

A pointer to a resmgr_context_t structure that the resource-manager library uses to pass context information between functions.

ocb

A pointer to the iofunc_ocb_t structure for the Open Control Block that was created when the client opened the resource.

ioflag

The operation being performed on the OCB:

• _IO_FLAG_WR — writing.
• _IO_FLAG_RD — reading.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The iofunc_sync() function indicates if some form of synchronization is needed.

Returns:

O_DSYNC

Data integrity is needed.

O_SYNC

File integrity is needed.

0

Synchronization isn't needed.

Classification:

QNX Neutrino

See also:

iofunc_open(), iofunc_write_default(), iofunc_write_verify()

Writing a Resource Manager

Resource Managers chapter of Getting Started with QNX Neutrino