public final void marshal(
ThreadContext context, InvocationBuffer buffer, IRubyObject parameter) {
if (!(parameter instanceof Struct)) {
throw context
.getRuntime()
.newTypeError(
"wrong argument type "
+ parameter.getMetaClass().getName()
+ " (expected instance of FFI::Struct)");
}
IRubyObject memory = ((Struct) parameter).getMemory();
if (!(memory instanceof AbstractMemory)) {
throw context
.getRuntime()
.newTypeError("wrong struct memory type " + memory.getMetaClass().getName());
}
MemoryIO io = ((AbstractMemory) memory).getMemoryIO();
if (io instanceof DirectMemoryIO) {
if (io.isNull()) {
throw context
.getRuntime()
.newRuntimeError("Cannot use a NULL pointer as a struct by value argument");
}
buffer.putStruct(((DirectMemoryIO) io).getAddress());
} else if (io instanceof ArrayMemoryIO) {
ArrayMemoryIO aio = (ArrayMemoryIO) io;
buffer.putStruct(aio.array(), aio.arrayOffset());
} else {
throw context.getRuntime().newRuntimeError("Invalid struct memory");
}
}
private static final void addBufferParameter(
InvocationBuffer buffer, IRubyObject parameter, int flags) {
ArrayMemoryIO memory = (ArrayMemoryIO) ((Buffer) parameter).getMemoryIO();
buffer.putArray(
memory.array(),
memory.arrayOffset(),
memory.arrayLength(),
flags & bufferFlags((Buffer) parameter));
}