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       evs_initialize - Create a new connection to the EVS service


       #include <openais/evs.h>

       int evs_initialize(evs_handle_t *handle, evs_callbacks_t *callbacks);


       The  evs_initialize  function is used to initialize a connection to the
       extended virtual synchrony API.

       Each application may have several connections to  the  EVS  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 EVS

       Every time an EVS event occurs, one of the callbacks specified  by  the
       argument  callbacks is called.  The callback functions are described by
       the following type definitions:

              typedef void (*evs_deliver_fn_t) (
                      struct evs_address source_addr,
                      void *msg,
                      int msg_len);

              typedef void (*evs_confchg_fn_t) (
                      struct evs_address *member_list, int member_list_entries,
                      struct evs_address *left_list, int left_list_entries,
                      struct evs_address *joined_list, int joined_list_entries);

       The callbacks argument is of the type:

              typedef struct {
                      evs_deliver_fn_t evs_deliver_fn;
                      evs_confchg_fn_t evs_confchg_fn;
              } evs_callbacks_t;

       When a configuration change occurs or a message is to be delivered  one
       of  the  callbacks  is  called  from the evs_dispatch() function.  If a
       configuration change occurs, evs_confchg_fn is called.  If  a  delivery
       of a message occurs, evs_deliver_fn is called.

       The evs_address structure is defined

              struct evs_address {
                      unsigned int nodeid;
                      unsigned short family;
                      unsigned char addr[TOTEMIP_ADDRLEN];

       where nodeid is a 32 bit unique node identifier, family is of the value
       AF_INET  for an IPV4 network, or AF_INET6 for an IPV6 network, and addr
       is a 32 bit address for an IPV4 network, or 128 bit address for an IPV6


       This call returns the EVS_OK value if successful, otherwise an error is


       The errors are undocumented.


       evs_overview(8),   evs_finalize(3),   evs_fd_get(3),   evs_dispatch(3),
       evs_join(3),  evs_leave(3),  evs_mcast_joined(3),  evs_mcast_groups(3),