cmap_dispatch (3) - Linux Manuals

cmap_dispatch: Dispatches callbacks from the CMAP service


cmap_dispatch - Dispatches callbacks from the CMAP service


#include <corosync/cmap.h>

cs_error_t cmap_dispatch (cmap_handle_t handle, cs_dispatch_flags_t dispatch_types);


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:

Dispatch at least one callback, blocking until the callback is dispatched.
Dispatch all waiting callbacks without blocking to wait for any callbacks.
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.
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.


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


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 inturrupted by a signal

CS_ERR_NOT_SUPPORTED The requested protocol/functuality not supported

CS_ERR_MESSAGE_ERROR Incorrect auth message received

CS_ERR_NO_MEMORY Not enough memory to completed the requested task