votequorum_initialize(3) [centos man page]

VOTEQUORUM_INITIALIZE(3)			    Corosync Cluster Engine Programmer's Manual 			  VOTEQUORUM_INITIALIZE(3)

NAME

       votequorum_initialize - Create a new connection to the VoteQuorum service

SYNOPSIS

       #include <corosync/votequorum.h>

       int votequorum_initialize(votequorum_handle_t *handle, votequorum_callbacks_t *callbacks);

DESCRIPTION

       The votequorum_initialize function is used to initialize a connection to the vote-based quorum database API.

       Each  application  may  have several connections to the votequorum API.	Each application uses the handle argument to uniquely identify the
       connection.  The handle argument is then used in other function calls to identify the connection to be  used  for  communication  with  the
       votequorum service.

       Every  time  the  voting  configuraton  changes	(eg  a node joins or leave the cluster), the callback is called.  The callback function is
       described by the following type definitions:

       typedef void (*votequorum_notification_fn_t) (
	    votequorum_handle_t handle,
	    uint64_t context,
	    uint32_t quorate,
	    uint32_t node_list_entries,
	    votequorum_node_t node_list[]
	    );

       Every time the expected votes are changed, the callback is called.  The expected votes callback function is described by the following type
       definitions:

       typedef void (*votequorum_expectedvotes_notification_fn_t) (
	       votequorum_handle_t handle,
	       uint64_t context,
	       uint32_t expected_votes);

       The callbacks argument is of the type:

       typedef struct {
	    votequorum_notification_fn_t votequorum_notify_fn;
	    votequorum_expectedvotes_notification_fn_t votequorum_expectedvotes_notify_fn;
       } votequorum_callbacks_t;

       When a configuration change occurs, the callback is called from the votequorum_dispatch() function.

RETURN VALUE

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

ERRORS

       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

SEE ALSO

       votequorum_overview(8),	 votequorum_finalize(3),   votequorum_getinfo(3),   votequorum_trackstart(3),	votequorum_trackstop(3),  votequo-
       rum_fd_get(3),	votequorum_dispatch(3),   votequorum_context_set(3),   votequorum_context_get(3),   votequorum_setexpected(3),	  votequo-
       rum_setvotes(3)

corosync Man Page						    2014-06-10						  VOTEQUORUM_INITIALIZE(3)

Check Out this Related Man Page

QUORUM_DISPATCH(3)				    Corosync Cluster Engine Programmer's Manual 				QUORUM_DISPATCH(3)

NAME

       quorum_dispatch - Dispatches callbacks from the quorum service

SYNOPSIS

       #include <corosync/quorum.h>

       int quorum_dispatch(quorum_handle_t handle, cs_dispatch_flags_t *dispatch_types);

DESCRIPTION

       The quorum_dispatch function is used to dispatch configuration changes.

       Each  application may have several connections to the quorum API.  Each	application uses the handle argument to uniquely identify the con-
       nection.

       The dispatch_types argument is used to identify the type of dispatch to execute.  The possible types are defined by the structure:

       typedef enum {
	       CS_DISPATCH_ONE = 1,
	       CS_DISPATCH_ALL = 2,
	       CS_DISPATCH_BLOCKING = 3,
	       CS_DISPATCH_ONE_NONBLOCKING = 4
       } cs_dispatch_flags_t;

       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  quorum_dis-
	      patch() 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.

RETURN VALUE

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

ERRORS

       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

SEE ALSO

       quorum_overview(8),   quorum_initialize(3),   quorum_finalize(3),  quorum_getquorate(3),  quorum_trackstart(3),	quorum_trackstop(3),  quo-
       rum_fd_get(3), quorum_context_set(3), quorum_context_get(3)

corosync Man Page						    2014-06-10							QUORUM_DISPATCH(3)

Linux and UNIX Man Pages

votequorum_initialize(3) [centos man page]

Check Out this Related Man Page