iofunc_sync()
QNX SDP8.0C Library ReferenceAPIDeveloper
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:
Safety: | |
---|---|
Cancellation point | No |
Signal handler | Yes |
Thread | Yes |
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