NAME

       cpg_mcast_joined - Multicasts to all groups joined to a handle

SYNOPSIS

       #include <sys/uio.h>
       #include <corosync/cpg.h>

       int cpg_mcast_joined(cpg_handle_t handle, cpg_guarantee_t guarantee, struct iovec *iovec, int iov_len);

DESCRIPTION

       The cpg_mcast_joined function will multicast a message to all the processes that have been
       joined with the cpg_join(3) function for the same group name.  Messages that are  sent  to
       any  of  the  groups  joined  to  the parameter handle will be delivered to all subscribed
       processes in the system.

       The argument guarantee requests a delivery guarantee for the  message  to  be  sent.   The
       cpg_guarantee_t type is defined by:

              typedef enum {
                      CPG_TYPE_UNORDERED,     /* not implemented */
                      CPG_TYPE_FIFO,          /* same as agreed */
                      CPG_TYPE_AGREED,        /* implemented */
                      CPG_TYPE_SAFE           /* not implemented */
              } cpg_guarantee_t;

       The meanings of the cpg_guarantee_t typedef are:

       CPG_TYPE_UNORDERED
              Messages  are  guaranteed to be delivered, but with no particular order.  This mode
              is unimplemented in the CPG library.

       CPG_TYPE_FIFO
              Messages are guaranteed to be delivered in first sent  first  delivery  order.   In
              fact, this guarantee is equivalent to the CPG_TYPE_AGREED guarantee.

       CPG_TYPE_AGREED
              All  processors must agree on the order of delivery.  If a message is sent from two
              or more processes at about the same time, the delivery will occur in the same order
              to all processes.

       CPG_TYPE_SAFE
              All processes must agree on the order of delivery.  Further all processes must have
              a copy of the message before any delivery takes place.  This mode is  unimplemented
              in the CPG library.

       The  iovec argument describes the scatter/gather list which is used to transmit a message.
       This is a iovec described by:

              struct iovec
              {
                      void *iov_base;     /* Pointer to data.  */
                      unsigned int iov_len;     /* Length of data.  */
              };

       The iov_len argument describes the number of entries in the iovec argument.

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(3),  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 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