1EVS_MCAST_JOINED(3)Corosync Cluster Engine Programmer's ManuaElVS_MCAST_JOINED(3)
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NAME

6       evs_join - Multicasts to all groups joined to an handle
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SYNOPSIS

9       #include <sys/uio.h> #include <corosync/evs.h>
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11       int  evs_mcast_joined(evs_handle_t  handle,  evs_guraantee_t guarantee,
12       struct iovec *iovec, int iov_len);
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DESCRIPTION

15       The evs_mcast_joined function is multicast a message to all the  groups
16       that  have  been  joined with the evs_join(3) function for the argument
17       handle.  Messages that are sent to any of  the  groups  joined  to  the
18       parameter handle will be delivered to all processors in the system.
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20       The argument guarantee requests a delivery guarantee for the message to
21       be sent.  The evs_guarantee_t type is defined by:
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23              typedef enum {
24                  EVS_TYPE_UNORDERED,       /* not implemented */
25                  EVS_TYPE_FIFO,          /* same as agreed */
26                  EVS_TYPE_AGREED,          /* implemented */
27                  EVS_TYPE_SAFE           /* not implemented */
28              } evs_guarantee_t;
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30       The meanings of the evs_guarantee_t typedef are:
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32       EVS_GUARANTEE_UNORDERED
33              Messages are guaranteed to be delivered, but with no  particular
34              order.  This mode is unimplemented in the EVS library.
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36       EVS_GUARANTEE_FIFO
37              Messages  are  guaranteed  to  be  delivered in first sent first
38              delivery order from one one.  In fact, this guarantee  is  actu‐
39              ally the AGREED guarantee.
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41       EVS_GUARANTEE_AGREED
42              All  processors  must agree on the order of delivery.  If a mes‐
43              sage is sent from two or more processors at about the same time,
44              the delivery will occur in the same order to all processors.
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46       EVS_GUARANTEE_SAFE
47              All processors must agree on the order of delivery.  Further all
48              processors must have a copy of the message before  any  delivery
49              takes place.  This mode is unimplemented in the EVS library.
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51       The  iovec  argument describes the scatter/gather list which is used to
52       transmit a message.  This is a standard socket structure described by:
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54              struct iovec
55              {
56                  void *iov_base;     /* Pointer to data.  */
57                  unsigned int iov_len;     /* Length of data.  */
58              };
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60       The iovlen argument describes the number of entires in the iovec  argu‐
61       ment.
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RETURN VALUE

65       This call returns the EVS_OK value if successful, otherwise an error is
66       returned.
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ERRORS

69       The errors are undocumented.
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SEE ALSO

72       evs_overview(8),  evs_initialize(3),  evs_finalize(3),   evs_fd_get(3),
73       evs_dispatch(3),    evs_leave(3),   evs_join(3),   evs_mcast_groups(3),
74       evs_membership_get(3) evs_context_get(3) evs_context_set(3)
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76corosync Man Page                 3004-08-31               EVS_MCAST_JOINED(3)
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