AttachCurrentThread not setting 'env' parameter

573044

Here are a bunch of snippets of my code (written in Pascal). I tried to grab all of the important parts - let me know if I missed anything.

//type declarations
PJavaVM  = ^JavaVM; 
PJNIEnv = ^JNIEnv;
...
//global variable
var
  MainJVM : JavaType.PJavaVM;
...
// Setting the 'MainJVM' variable (from the main thread) within a procedure
var
  env : JavaType.PJNIEnv
...
env^^.GetJavaVM(env,MainJVM);
...
// Attaching MainJVM's thread to 'env' (which isn't working) within a procedure
var
  env : JavaType.PJNIEnv;
...
MainJVM^^.AttachCurrentThread(MainJVM,@env,nil)

Everything seems to be working up to the 'AttachCurrentThread' line. That line returns a 0 but the value of 'env' isn't updated.

Thanks!

802316

I have never tried this from Pascal (haven't used it in 22 years ), but in C the parameter type is

jint AttachCurrentThread(JavaVM *vm, JNIEnv **p_env, void *thr_args);

So p_env should be a pointer to a pointer to a JNIEnv.

Is that the case here?

573044

I believe it is.
env is of type "PJNIEnv" which is "^JNIEnv" (a pointer to JNIEnv).

AttachCurrentThread passes "@env" which is the address of "env". So it should be a pointer to a pointer to JNIEnv. Right? (I think so)