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using System;
using System.Runtime.InteropServices;
namespace TestSuite
{
class TestFunctionPointers
{
static bool called = false;
static int twice(int a)
{
called = true;
return a * 2;
}
static int thrice(int a)
{
called = true;
return a * 3;
}
static void setup()
{
called = false;
}
public static void set_callback_basic()
{
setup();
test.Testing obj = new test.TestingConcrete();
obj.SetCallback(twice);
Test.Assert(called == false, "set_callback should not call the callback");
int x = obj.CallCallback(42);
Test.Assert(called, "call_callback must call a callback");
Test.AssertEquals(42 * 2, x);
}
public static void set_callback_with_lambda()
{
setup();
test.Testing obj = new test.TestingConcrete();
obj.SetCallback(y => {
called = true;
return y + 4;
});
Test.Assert(called == false, "set_callback should not call the callback");
int x = obj.CallCallback(37);
Test.Assert(called, "call_callback must call a callback");
Test.AssertEquals(37 + 4, x);
}
public static void replace_callback()
{
setup();
test.Testing obj = new test.TestingConcrete();
obj.SetCallback(twice);
Test.Assert(called == false, "set_callback should not call the callback");
int x = obj.CallCallback(42);
Test.Assert(called, "call_callback must call a callback");
Test.AssertEquals(42 * 2, x);
bool new_called = false;
obj.SetCallback(y => {
new_called = true;
return y * y;
});
Test.Assert(new_called == false, "set_callback should not call the callback");
x = obj.CallCallback(42);
Test.Assert(new_called, "call_callback must call a callback");
Test.AssertEquals(42 * 42, x);
}
class NoOverride : test.TestingInherit {
}
public static void set_callback_inherited_no_override()
{
setup();
NoOverride obj = new NoOverride();
obj.SetCallback(thrice);
Test.Assert(!called, "set_callback in virtual should not call the callback");
int x = obj.CallCallback(42);
Test.Assert(called, "call_callback must call a callback");
Test.AssertEquals(42 * 3, x);
}
class WithOverride : test.TestingInherit {
public bool set_called = false;
public bool invoke_called = false;
public test.SimpleCb cb = null;
public WithOverride() : base() {
}
public override void SetCallback(test.SimpleCb cb) {
set_called = true;
this.cb = cb;
}
public override int CallCallback(int a) {
invoke_called = true;
if (cb != null)
return cb(a);
eina.Log.Error("No callback set upon call_callback invocation");
return -1;
}
}
public static void set_callback_inherited_with_override()
{
setup();
WithOverride obj = new WithOverride();
obj.SetCallback(thrice);
Test.Assert(obj.set_called, "set_callback override must have been called");
Test.Assert(!obj.invoke_called, "invoke_callback must not have been called");
obj.set_called = false;
int x = obj.CallCallback(42);
Test.Assert(!obj.set_called, "set_callback override must not have been called");
Test.Assert(obj.invoke_called, "set_callback in virtual should not call the callback");
Test.Assert(called, "call_callback must call a callback");
Test.AssertEquals(42 * 3, x);
}
// These are needed due to issues calling methods on obj from the GC thread (where the
// free function is actually called)
[System.Runtime.InteropServices.DllImport("efl_mono_native_test")] static extern bool free_called_get();
[System.Runtime.InteropServices.DllImport("efl_mono_native_test")] static extern bool free_called_set(bool val);
public static void set_callback_inherited_called_from_c()
{
setup();
WithOverride obj = new WithOverride();
free_called_set(false);
obj.CallSetCallback();
Test.Assert(obj.set_called, "set_callback override must have been called");
Test.Assert(!obj.invoke_called, "invoke_callback must not have been called");
Test.Assert(!free_called_get(), "call_set_callback must not call the free callback");
obj.set_called = false;
int x = obj.CallCallback(42);
Test.Assert(!obj.set_called, "set_callback override must not have been called");
Test.Assert(obj.invoke_called, "set_callback in virtual should not call the callback");
Test.Assert(!free_called_get(), "call_callback must not call the free callback");
Test.AssertEquals(42 * 3, x);
setup();
obj.set_called = false;
obj.invoke_called = false;
free_called_set(false);
// Should release the handle to the wrapper allocated when calling set_callback from C.
obj.SetCallback(twice);
GC.Collect();
GC.WaitForPendingFinalizers();
Test.Assert(obj.set_called, "set_callback override must have been called");
Test.Assert(!obj.invoke_called, "invoke_callback must not have been called");
Test.Assert(free_called_get(), "free callback must have been called");
obj.set_called = false;
free_called_set(false);
x = obj.CallCallback(42);
Test.Assert(!obj.set_called, "set_callback override must not have been called");
Test.Assert(obj.invoke_called, "set_callback in virtual should not call the callback");
Test.Assert(!free_called_get(), "must not call old free_callback on new callback");
Test.Assert(called, "call_callback must call a callback");
Test.AssertEquals(42 * 2, x);
}
}
}
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