EsEntryPoint protocols

EsEntryPoint has the following methods:

Instance methods: accessing

address

Answers the address (a positive integer) of the receiver. If the receiver is not already bound, binds it. If the binding fails, a walkback occurs.

failAddress

Answers the fail address (a positive integer) of the receiver. Answers 0 if no fail address has been specified.

failAddress:

Sets the fail address (a positive integer) of the receiver to anInteger. If anInteger is not valid, a walkback occurs.

receiver

Answers the receiver of the callback message selector. Answers the selector of the callback message.

isArrayBased

Answers true if the received accepts arguments as an array; false if the receiver accepts each argument individually.

callingConvention

Answers the calling convention (a Symbol) of the receiver.

parameterCount

Answers the number of arguments expected by the receiver.

parameterTypes

Answers an array of the receiver's argument types (instances of Symbol).

returnType

Answers the Symbol describing the return type of the receiver.

Instance methods: miscellaneous

unbind

Unbinds the receiver. This returns the receiver's address to the pool of available addresses. The receiver must not be in use when it is unbound or the system may crash the next time the address is called. This also resets the fail address of the receiver to zero. All instances of EsEntryPoint and its subclasses are unbound when the image starts.

Class methods: instance creation

receiver:selector:callingConvention:arrayBased:parameterTypes:returnType:

Answers a new EsEntryPoint with the given parameters. The callingConvention must be a String or Symbol. The receiver parameter may be any Smalltalk object. The selector parameter must be a Symbol. parameterTypes is an array of type names and returnType is a single type name.

There are two kinds of EsEntryPoints, depending on the value of arrayBased parameter when the EsEntryPoint was created. If arrayBased is false, the selector must take the same number of parameters as the number of parameters in the parameterTypes array; that is, one per external language parameter. If arrayBased is true, the selector must take one parameter, which is an array of all the parameters.