DeclareCallBackMBS.Constructor(Signature as String)

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	DynamicDeclares	MBS Util Plugin	20.3	✅ Yes	✅ Yes	✅ Yes	✅ Yes	All

Creates a new callback object.

Please pass a valid signature, e.g. "(pi)v" for a function taking one pointer, one integer and return nothing (void).
If the signature doesn't match the values put on the stack, the app may crash.

DeclareCallBackMBS.ParameterCFRetain(Index as Integer) as Boolean

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	DynamicDeclares	MBS Util Plugin	20.3	✅ Yes	✅ Yes	✅ Yes	✅ Yes	All

Sets whether a parameter needs to be retained via CFRetain() call.

If the callback is within Apple's frameworks passing a CoreFoundation object, you can set this property to true, so we call CFRetain method on it in the callback and later release when the Xojo event was called.
This allows to avoid crashes with CoreFoundation objects passed from one thread to another thread for multi threaded callbacks.

Parameter must be of type pointer.
(Read and Write computed property)

DeclareCallBackMBS.ParameterCopyString(Index as Integer) as Boolean

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	DynamicDeclares	MBS Util Plugin	20.3	✅ Yes	✅ Yes	✅ Yes	✅ Yes	All

Sets whether a parameter needs to be copied as a zero terminated string.

If the callback receives a C string, you can set this property to true, so we copy it in the callback and later release when the Xojo event was called.
This allows to avoid crashes with strings passed from one thread to another thread for multi threaded callbacks.

Parameter must be of type pointer or string.
(Read and Write computed property)

DeclareCallBackMBS.ParameterNSRetain(Index as Integer) as Boolean

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	DynamicDeclares	MBS Util Plugin	20.3	✅ Yes	✅ Yes	✅ Yes	✅ Yes	All

Sets whether a parameter needs to be retained via [NSObject retain] call.

If the callback is within Apple's frameworks passing a Objective-C object, you can set this property to true, so we call retain method on it in the callback and later release when the Xojo event was called.
This allows to avoid crashes with NSObject objects passed from one thread to another thread for multi threaded callbacks.

Parameter must be of type pointer.
(Read and Write computed property)

DeclareCallBackMBS.ParameterType(Index as Integer) as String

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
method	DynamicDeclares	MBS Util Plugin	20.3	✅ Yes	✅ Yes	✅ Yes	✅ Yes	All

Queries type of a parameter.

Index in range from 0 to ParameterCount-1.