internal static jint DetachCurrentThread(JavaVM* pJVM)
{
if(TlsHack.ManagedJNIEnv == null)
{
// the JDK allows detaching from an already detached thread
return JNIEnv.JNI_OK;
}
// TODO if we set Thread.IsBackground to false when we attached, now might be a good time to set it back to true.
JNIEnv.FreeJNIEnv();
IKVM.NativeCode.java.lang.VMThread.jniDetach();
return JNIEnv.JNI_OK;
}
internal static jint GetEnv(JavaVM* pJVM, void **penv, jint version)
{
if(JNI.IsSupportedJniVersion(version))
{
JNIEnv.ManagedJNIEnv env = TlsHack.ManagedJNIEnv;
if(env != null)
{
*penv = env.pJNIEnv;
return JNIEnv.JNI_OK;
}
*penv = null;
return JNIEnv.JNI_EDETACHED;
}
*penv = null;
return JNIEnv.JNI_EVERSION;
}
internal static jint AttachCurrentThreadImpl(JavaVM* pJVM, void** penv, JavaVMAttachArgs* pAttachArgs, bool asDaemon)
{
if(pAttachArgs != null)
{
if(!JNI.IsSupportedJniVersion(pAttachArgs->version) || pAttachArgs->version == JNIEnv.JNI_VERSION_1_1)
{
*penv = null;
return JNIEnv.JNI_EVERSION;
}
}
JNIEnv.ManagedJNIEnv env = TlsHack.ManagedJNIEnv;
if(env != null)
{
*penv = env.pJNIEnv;
return JNIEnv.JNI_OK;
}
// NOTE if we're here, it is *very* likely that the thread was created by native code and not by managed code,
// but it's not impossible that the thread started life as a managed thread and if it did the changes to the
// thread we're making are somewhat dubious.
System.Threading.Thread.CurrentThread.IsBackground = asDaemon;
if(pAttachArgs != null)
{
if(pAttachArgs->name != null && System.Threading.Thread.CurrentThread.Name == null)
{
try
{
System.Threading.Thread.CurrentThread.Name = JNIEnv.StringFromUTF8(pAttachArgs->name);
}
catch(InvalidOperationException)
{
// someone beat us to it...
}
}
object threadGroup = GlobalRefs.Unwrap(pAttachArgs->group.ToInt32());
if(threadGroup != null)
{
IKVM.NativeCode.java.lang.Thread.AttachThreadFromJni(threadGroup);
}
}
*penv = JNIEnv.CreateJNIEnv();
return JNIEnv.JNI_OK;
}
internal static jint AttachCurrentThread(JavaVM* pJVM, void **penv, void *args)
{
return AttachCurrentThreadImpl(pJVM, penv, (JavaVMAttachArgs*)args, false);
}
internal static jint DestroyJavaVM(JavaVM* pJVM)
{
if(JNI.jvmDestroyed)
{
return JNIEnv.JNI_ERR;
}
JNI.jvmDestroyed = true;
IKVM.NativeCode.java.lang.Thread.WaitUntilLastJniThread();
return JNIEnv.JNI_OK;
}
internal static int GetJavaVM(JNIEnv* pEnv, JavaVM **ppJavaVM)
{
*ppJavaVM = JavaVM.pJavaVM;
return JNI_OK;
}
internal static jint DestroyJavaVM(JavaVM* pJVM)
{
if(JNI.jvmDestroyed)
{
return JNIEnv.JNI_ERR;
}
JNI.jvmDestroyed = true;
Java_java_lang_Thread.WaitUntilLastJniThread();
return JNIEnv.JNI_OK;
}