Scilab function

pvm_bcast - broacasts a message to all members of a group

### Sequence d'appel

  `[info] = pvm_bcast(group, buff, msgtag)`

### Parametres

- `group` : string, string group name of an existing group.
- `buff` : data to be send.
- `msgtag` : integer, message tag supplied by the user.
- `info` : integer,

### Description

`pvm_bcast` broadcasts a message to all the members of

In PVM 3.2 and later the broadcast message is not sent back to the sender. Any PVM task can call pvm_bcast(), it need not be a member of the group. The content of the message can be distinguished by

If pvm_bcast is successful,

will be 0. If some error occurs then

will be < 0.

pvm_bcast is asynchronous. Computation on the sending processor resumes as soon as the message is safely on its way to the receiving processors. This is in contrast to synchronous communication, during which computation on the sending processor halts until a matching receive is executed by all the receiving processors.

pvm_bcast first determines the tids of the group members by checking a group data base. A multicast is performed to these tids. If the group is changed during a broadcast the change will not be reflected in the broadcast. Multicasting is not supported by most multiprocessor vendors. Typically their native calls only support broadcasting to `all` the user's processes on a multiprocessor. Because of this omission, pvm_bcast may not be an efficient communication method on some multiprocessors.

### Exemples

    info = pvm_bcast( "worker",[12+%i,4,5;3,4+%i,5],10)

### Voir aussi

`pvm_joingroup`