dart-sdk/tests/ffi/function_callbacks_test.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// Dart test program for testing dart:ffi function pointers with callbacks.
//
// VMOptions=
// VMOptions=--stacktrace-every=100
// VMOptions=--use-slow-path
// VMOptions=--use-slow-path --stacktrace-every=100
// VMOptions=--dwarf_stack_traces --no-retain_function_objects --no-retain_code_objects
// VMOptions=--test_il_serialization
// VMOptions=--profiler --profile_vm=true
// VMOptions=--profiler --profile_vm=false
// SharedObjects=ffi_test_functions

import 'dart:ffi';

import 'callback_tests_utils.dart';

typedef SimpleAdditionType = Int32 Function(Int32, Int32);
int simpleAddition(int x, int y) {
  print("simpleAddition($x, $y)");
  return x + y;
}

class Foo {
  static int simpleAddition(int x, int y) {
    print("Foo.simpleAddition($x, $y)");
    return x + y;
  }
}

typedef IntComputationType = Int64 Function(Int8, Int16, Int32, Int64);
int intComputation(int a, int b, int c, int d) {
  print("intComputation($a, $b, $c, $d)");
  return d - c + b - a;
}

typedef UintComputationType = Uint64 Function(Uint8, Uint16, Uint32, Uint64);
int uintComputation(int a, int b, int c, int d) {
  print("uintComputation($a, $b, $c, $d)");
  return d - c + b - a;
}

typedef SimpleMultiplyType = Double Function(Double);
double simpleMultiply(double x) {
  print("simpleMultiply($x)");
  return x * 1.337;
}

typedef SimpleMultiplyFloatType = Float Function(Float);
double simpleMultiplyFloat(double x) {
  print("simpleMultiplyFloat($x)");
  return x * 1.337;
}

typedef ManyIntsType = IntPtr Function(IntPtr, IntPtr, IntPtr, IntPtr, IntPtr,
    IntPtr, IntPtr, IntPtr, IntPtr, IntPtr);
int manyInts(
    int a, int b, int c, int d, int e, int f, int g, int h, int i, int j) {
  print("manyInts($a, $b, $c, $d, $e, $f, $g, $h, $i, $j");
  return a + b + c + d + e + f + g + h + i + j;
}

typedef ManyDoublesType = Double Function(Double, Double, Double, Double,
    Double, Double, Double, Double, Double, Double);
double manyDoubles(double a, double b, double c, double d, double e, double f,
    double g, double h, double i, double j) {
  print("manyDoubles($a, $b, $c, $d, $e, $f, $g, $h, $i, $j");
  return a + b + c + d + e + f + g + h + i + j;
}

typedef ManyArgsType = Double Function(
    IntPtr,
    Float,
    IntPtr,
    Double,
    IntPtr,
    Float,
    IntPtr,
    Double,
    IntPtr,
    Float,
    IntPtr,
    Double,
    IntPtr,
    Float,
    IntPtr,
    Double,
    IntPtr,
    Float,
    IntPtr,
    Double);
double manyArgs(
    int _1,
    double _2,
    int _3,
    double _4,
    int _5,
    double _6,
    int _7,
    double _8,
    int _9,
    double _10,
    int _11,
    double _12,
    int _13,
    double _14,
    int _15,
    double _16,
    int _17,
    double _18,
    int _19,
    double _20) {
  print("manyArgs( $_1, $_2, $_3, $_4, $_5, $_6, $_7, $_8, $_9, $_10," +
      "$_11, $_12, $_13, $_14, $_15, $_16, $_17, $_18, $_19, $_20)");
  return _1 +
      _2 +
      _3 +
      _4 +
      _5 +
      _6 +
      _7 +
      _8 +
      _9 +
      _10 +
      _11 +
      _12 +
      _13 +
      _14 +
      _15 +
      _16 +
      _17 +
      _18 +
      _19 +
      _20;
}

typedef StoreType = Pointer<Int64> Function(Pointer<Int64>);
Pointer<Int64> store(Pointer<Int64> ptr) => ptr.elementAt(1)..value = 1337;

typedef NullPointersType = Pointer<Int64> Function(Pointer<Int64>);
Pointer<Int64> nullPointers(Pointer<Int64> ptr) => ptr.elementAt(1);

typedef ReturnVoid = Void Function();
void returnVoid() {}

void throwException() {
  throw "Exception.";
}

typedef ThrowExceptionInt = IntPtr Function();
int throwExceptionInt() {
  throw "Exception.";
}

typedef ThrowExceptionDouble = Double Function();
double throwExceptionDouble() {
  throw "Exception.";
}

typedef ThrowExceptionPointer = Pointer<Void> Function();
Pointer<Void> throwExceptionPointer() {
  throw "Exception.";
}

typedef TakeMaxUint8x10Type = IntPtr Function(
    Uint8, Uint8, Uint8, Uint8, Uint8, Uint8, Uint8, Uint8, Uint8, Uint8);
int takeMaxUint8x10(
    int a, int b, int c, int d, int e, int f, int g, int h, int i, int j) {
  print("takeMaxUint8x10($a, $b, $c, $d, $e, $f, $g, $h, $i, $j)");
  return a == 0xff &&
          b == 0xff &&
          c == 0xff &&
          d == 0xff &&
          e == 0xff &&
          f == 0xff &&
          g == 0xff &&
          h == 0xff &&
          i == 0xff &&
          j == 0xff
      ? 1
      : 0;
}

typedef ReturnMaxUint8Type = Uint8 Function();
int returnMaxUint8() {
  return 0xff;
}

int returnMaxUint8v2() {
  return 0xabcff;
}

final testcases = [
  CallbackTest("SimpleAddition",
      Pointer.fromFunction<SimpleAdditionType>(simpleAddition, 0)),
  CallbackTest("SimpleAddition",
      Pointer.fromFunction<SimpleAdditionType>(Foo.simpleAddition, 0)),
  CallbackTest("IntComputation",
      Pointer.fromFunction<IntComputationType>(intComputation, 0)),
  CallbackTest("UintComputation",
      Pointer.fromFunction<UintComputationType>(uintComputation, 0)),
  CallbackTest("SimpleMultiply",
      Pointer.fromFunction<SimpleMultiplyType>(simpleMultiply, 0.0)),
  CallbackTest("SimpleMultiplyFloat",
      Pointer.fromFunction<SimpleMultiplyFloatType>(simpleMultiplyFloat, 0.0)),
  CallbackTest("ManyInts", Pointer.fromFunction<ManyIntsType>(manyInts, 0)),
  CallbackTest(
      "ManyDoubles", Pointer.fromFunction<ManyDoublesType>(manyDoubles, 0.0)),
  CallbackTest("ManyArgs", Pointer.fromFunction<ManyArgsType>(manyArgs, 0.0)),
  CallbackTest("Store", Pointer.fromFunction<StoreType>(store)),
  CallbackTest(
      "NullPointers", Pointer.fromFunction<NullPointersType>(nullPointers)),
  CallbackTest("ReturnVoid", Pointer.fromFunction<ReturnVoid>(returnVoid)),
  CallbackTest("ThrowExceptionDouble",
      Pointer.fromFunction<ThrowExceptionDouble>(throwExceptionDouble, 42.0)),
  CallbackTest("ThrowExceptionPointer",
      Pointer.fromFunction<ThrowExceptionPointer>(throwExceptionPointer)),
  CallbackTest("ThrowException",
      Pointer.fromFunction<ThrowExceptionInt>(throwExceptionInt, 42)),
  CallbackTest("TakeMaxUint8x10",
      Pointer.fromFunction<TakeMaxUint8x10Type>(takeMaxUint8x10, 0)),
  CallbackTest("ReturnMaxUint8",
      Pointer.fromFunction<ReturnMaxUint8Type>(returnMaxUint8, 0)),
  CallbackTest("ReturnMaxUint8",
      Pointer.fromFunction<ReturnMaxUint8Type>(returnMaxUint8v2, 0)),
];

void main() {
  testcases.forEach((t) => t.run());
}