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iofunc_lock()

Lock a resource

Synopsis:

#include <sys/iofunc.h>

int iofunc_lock( resmgr_context_t * ctp,
                 io_lock_t * msg,
                 iofunc_ocb_t * ocb,
                 iofunc_attr_t * attr );

Arguments:

ctp: A pointer to a resmgr_context_t structure that the resource-manager library uses to pass context information between functions.
msg: A pointer to the io_lock_t structure that contains the message that the resource manager received.
ocb: A pointer to the iofunc_ocb_t structure for the Open Control Block that was created when the client opened the resource.
attr: A pointer to the iofunc_attr_t structure that describes the characteristics of the device that's associated with your resource manager.

Library:

libc

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

Description:

The function iofunc_lock() does what is required for POSIX locks. This function isn't currently implemented.

Returns:

ENOSYS: The iofunc_lock() function isn't currently supported.

Classification:

QNX Neutrino

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