Hi.
This piece of code is handy to safely always get a JNIEnv valid for the
current thread, think I found it in suns JNI documentation.
JNIEnv getEnv(JavaVM *VMPtr)
{
JNIEnv *env = NULL;
int result = VMPtr->GetEnv((void**)&env, JNI_VERSION_1_4);
if (result == JNI_EDETACHED)
{
result = VMPtr->AttachCurrentThreadAsDaemon((void**)&env, NULL);
if (result != 0)
{
return NULL;
}
}
return env;
}
AttachCurrentThreadAsDemon is handy, because you don't need to quit
that thread when quitting (JVM quit's when there are no user threas,
only Daemon threads).
I'm using JNI to communicate with a J2EE server from a legacy C++
application. Every call to the server is done in a new thread. The
initial tread creates the JVM and authenticates to the server. In
following invocations I need the initial threads class loader. That's
accomplished by a call to:
Thread.currentThread().setContextClassLoader(theGlobalClassLoader).
There might be other reasons to reuse the same classloader.
OlaM
On 2004-12-12, at 11.07, Dr. Jörg Wurzer wrote:
I have to develop a JNI to integrate the os x addressbook into an
application. It was rather easy to use the API and all junit tests of
my classes are successfull, but the application crashes with the
message:
... has exited due to signal 10 (SIGBUS).
Because of parallel threads I tried to solve the problem by programing
the class with the native methods as a singelton. But that doesn't
help. For the native class I use C.
Has anyone an idea how to solve the problem or how to search for the
error in the code?
Jörg
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