Built-in Communications Tools

Resource Arbitration Options

}

} ];

results := myATalkEP:Instantiate(myATalkEP, myOptions);

The AppleTalk tool options are summarized in Table 24-6. These options are
described in detail in "Options for the AppleTalk Tool" (page 21-71) in Newton
Programmer's Reference.

Resource Arbitration Options

24

You can construct a communications tool to share its resources with other
communications tools. For example, you might need to use a hardware port that
other tools want to use. This section describes how you can implement resource
sharing in your communications tool.

The communications tool base provides a default implementation of resource
arbitration that uses two options to control the release of a tool's resources:

The resource-passive claim option (

kCMOPassiveClaim

) has a Boolean

value that specifies whether or not a communications tool is claiming its
resources passively or actively. If this value is

true

, the communications tool is

Summary of AppleTalk options

kCMARouteLabel

"rout"

When connecting
or listening

Sets an AppleTalk
NBP address.

kCMOAppleTalkBuffer

"bsiz"

When connecting,
listening, or
accepting

Sets the size of the
send, receive, and
attention buffers.

kCMOSerialBytesAvailable

"sbav"

After connecting

Read-only option
returns the number of
bytes available in the
receive buffer.

kCMSAppleTalkID

"atlk"

For instantiation

Specifies AppleTalk
tool type.

kCMOEndpointName

"endp"

For instantiation

Specifies AppleTalk
endpoint. Must be used
as above.