Uses of Class
jdk.incubator.foreign.FunctionDescriptor

Packages that use FunctionDescriptor

Package	Description
jdk.incubator.foreign	Classes to support low-level and efficient foreign memory/function access, directly from Java.

Uses of FunctionDescriptor in jdk.incubator.foreign

Methods in jdk.incubator.foreign that return FunctionDescriptor

Modifier and Type	Method	Description
FunctionDescriptor	FunctionDescriptor.appendArgumentLayouts(MemoryLayout... addedLayouts)	Create a new function descriptor with the given argument layouts appended to the argument layout array of this function descriptor.
FunctionDescriptor	FunctionDescriptor.asVariadic(MemoryLayout... variadicLayouts)	Obtain a specialized variadic function descriptor, by appending given variadic layouts to this function descriptor argument layouts.
FunctionDescriptor	FunctionDescriptor.changeReturnLayout(MemoryLayout newReturn)	Create a new function descriptor with the given memory layout as the new return layout.
FunctionDescriptor	FunctionDescriptor.dropReturnLayout()	Create a new function descriptor with the return layout dropped.
FunctionDescriptor	FunctionDescriptor.insertArgumentLayouts(int index, MemoryLayout... addedLayouts)	Create a new function descriptor with the given argument layouts inserted at the given index, into the argument layout array of this function descriptor.
static FunctionDescriptor	FunctionDescriptor.of(MemoryLayout resLayout, MemoryLayout... argLayouts)	Create a function descriptor with given return and argument layouts.
static FunctionDescriptor	FunctionDescriptor.ofVoid(MemoryLayout... argLayouts)	Create a function descriptor with given argument layouts and no return layout.

Methods in jdk.incubator.foreign that return types with arguments of type FunctionDescriptor

Modifier and Type	Method	Description
Optional<DynamicConstantDesc<FunctionDescriptor>>	FunctionDescriptor.describeConstable()	Returns an Optional containing the nominal descriptor for this function descriptor, if one can be constructed, or an empty Optional if one cannot be constructed.

Methods in jdk.incubator.foreign with parameters of type FunctionDescriptor

Modifier and Type	Method	Description
MethodHandle	CLinker.downcallHandle(FunctionDescriptor function)	Obtains a foreign method handle, with the given type and featuring the given function descriptor, which can be used to call a target foreign function at the address in a dynamically provided native symbol.
default MethodHandle	CLinker.downcallHandle(NativeSymbol symbol, FunctionDescriptor function)	Obtains a foreign method handle, with the given type and featuring the given function descriptor, which can be used to call a target foreign function at the address in the given native symbol.
static MethodType	CLinker.downcallType(FunctionDescriptor functionDescriptor)	Obtains the downcall method handle type associated with a given function descriptor.
NativeSymbol	CLinker.upcallStub(MethodHandle target, FunctionDescriptor function, ResourceScope scope)	Allocates a native stub with given scope which can be passed to other foreign functions (as a function pointer); calling such a function pointer from native code will result in the execution of the provided method handle.
static MethodType	CLinker.upcallType(FunctionDescriptor functionDescriptor)	Obtains the method handle type associated with an upcall stub with given function descriptor.