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
| Safety: |
|
|---|
| Cancellation point |
No |
| Interrupt handler |
No |
| Signal handler |
Yes |
| Thread |
Yes |