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

See also:

iofunc_lock_calloc(), iofunc_lock_free()

Writing a Resource Manager chapter of the Programmer's Guide.