In my JNI C++ Code, how can i check if the current thread has already been attached to a VM?
Created May 4, 2012
Peter Mularien Here is an excerpt from the Java 2 JNI documentation:
jint GetEnv(JavaVM *vm, void **env, jint version);
If the current thread is not attached to the VM, sets *env to NULL, and returns JNI_EDETACHED. If the specified version is not supported, sets *env to NULL, and returns JNI_EVERSION.
Otherwise, sets *env to the appropriate interface, and returns JNI_OK.
So you'd use it like this:
if (theVM->GetEnv (theVm, (void *) &env, JNI_VERSION_1_2) == JNI_EDETACHED) {
// detached
} else {
// attached
}
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