quorum_initialize(3) [centos man page]

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

NAME

       quorum_initialize - Create a new connection to the Quorum service

SYNOPSIS

       #include <corosync/quorum.h>

       int quorum_initialize(quorum_handle_t *handle, quorum_callbacks_t *callbacks, uint32_t *quorum_type);

DESCRIPTION

       The quorum_initialize function is used to initialize a connection to the quorum API.

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

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

       typedef void (*quorum_notification_fn_t) (
	       quorum_handle_t handle,
	       uint32_t quorate,
	       uint64_t ring_seq,
	       uint32_t view_list_entries,
	       uint32_t *view_list
	       );

       The callbacks argument is of the type:

       typedef struct {
	       quorum_notification_fn_t quorum_notify_fn;
       } quorum_callbacks_t;

       The quorum_type argument is set to:

       #define QUORUM_FREE     0
       #define QUORUM_SET      1

       QUORUM_FREE value means that no quorum algorithm is loaded and that no callbacks will take place.

       QUORUM_SET value means that one quorum algorithm is configured and that callbacks will take place.

       When a configuration change occurs, the callback is called from the quorum_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

       quorum_overview(8), quorum_finalize(3),	quorum_getquorate(3),  quorum_trackstart(3),  quorum_trackstop(3),  quorum_fd_get(3),  quorum_dis-
       patch(3), quorum_context_set(3), quorum_context_get(3)

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

Check Out this Related Man Page

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

NAME

       cpg_dispatch - Dispatches callbacks from the CPG service

SYNOPSIS

       #include <corosync/cpg.h>

       int cpg_dispatch(cpg_handle_t handle, cpg_dispatch_t *dispatch_types);

DESCRIPTION

       The cpg_dispatch function is used to dispatch configuration changes or messages from the closed process groups API.

       Each  application may have several connections to the CPG API.  Each  application uses the handle argument to uniquely identify the connec-
       tion.

       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,
		      CS_DISPATCH_ALL,
		      CS_DISPATCH_BLOCKING
	      } cpg_dispatch_t;

       The dispatch values have the following meanings:

       CS_DISPATCH_ONE
	      Dispatch atleast 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  cpg_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

       The errors are undocumented.

SEE ALSO

       cpg_overview(8),  cpg_initialize(3),  cpg_finalize(3),  cpg_fd_get(3),  cpg_dispatch(3),  cpg_join(3),  cpg_leave(3),  cpg_mcast_joined(3),
       cpg_membership_get(3) cpg_zcb_alloc(3) cpg_zcb_free(3) cpg_zcb_mcast_joined(3) cpg_context_get(3) cpg_context_set(3) cpg_local_get(3)

       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

corosync Man Page						    2004-08-31							   CPG_DISPATCH(3)

Linux and UNIX Man Pages

quorum_initialize(3) [centos man page]

Check Out this Related Man Page