CMAP_DISPATCH(3) Corosync Cluster Engine Programmer's Manual

NAME

cmap_dispatch - Dispatches callbacks from the CMAP service

SYNOPSIS

#include <corosync/cmap.h>


cs_error_t cmap_dispatch (cmap_handle_t handle, cs_dispatch_flags_t
dispatch_types);

DESCRIPTION

The cmap_dispatch function is used to dispatch configuration changes.

Each application may have several connections to the CMAP API. Each
application uses the handle argument to uniquely identify the
connection.

The dispatch_types argument is used to identify the type of dispatch
to execute. The possible types are CS_DISPATCH_ONE, CS_DISPATCH_ALL
and CS_DISPATCH_BLOCKING.

The dispatch values have the following meanings:

CS_DISPATCH_ONE
Dispatch at least one callback, blocking until the callback is
dispatched.

CS_DISPATCH_ALL
Dispatch all waiting callbacks without blocking to wait for
any callbacks.

CS_DISPATCH_BLOCKING
Dispatch all callbacks blocking indefinitely. This is used in
a threaded program where a thread is created, and then
cs_dispatch() is called immediately from the created thread to
execute callbacks.

CS_DISPATCH_ONE_NONBLOCKING
Dispatch at most one callback. If there is no pending
callback, CS_ERR_TRY_AGAIN is returned.

It's needed to call cmap_track_add(3) to add tracked items and
receive callbacks.

RETURN VALUE

This call returns the CS_OK value if successful, otherwise an error
is returned.

SEE ALSO

cmap_track_add(3), cmap_track_delete(3), cmap_overview(8)

CS_ERR_TRY_AGAIN Resource temporarily unavailable

CS_ERR_INVALID_PARAM Invalid argument

CS_ERR_ACCESS Permission denied

CS_ERR_LIBRARY The connection failed

CS_ERR_INTERRUPT System call interrupted by a signal

CS_ERR_NOT_SUPPORTED The requested protocol/functionality not
supported

CS_ERR_MESSAGE_ERROR Incorrect auth message received

CS_ERR_NO_MEMORY Not enough memory to complete the requested task

corosync Man Page 23/01/2012 CMAP_DISPATCH(3)