Table of Contents
Which is method eventually calls JNI _ onload-stack?
JNI_OnLoad must return the JNI version needed by the native library. In order to use any of the new JNI functions, a native library must export a JNI_OnLoad function that returns JNI_VERSION_1_2.
How does the JNI interface work in Java?
The JNI interface pointer (JNIEnv) is valid only in the current thread. Should another thread need to access the Java VM, it must first call AttachCurrentThread()to attach itself to the VM and obtain a JNI interface pointer. Once attached to the VM, a native thread works just like an ordinary Java thread running inside a native method.
When to invoke JNI onunload function in Java?
When the class loader containing a statically linked native library L is garbage collected, the VM will invoke the JNI_OnUnload_Lfunction of the library if such a function is exported. If a statically linked library L exports a function called JNI_OnUnload_Land a function called JNI_OnUnload, the JNI_OnUnloadfunction will be ignored.
When to call JNI _ onloadmust in Java VM?
Optional function defined by dynamically linked libraries. The VM calls JNI_OnLoadwhen the native library is loaded (for example, through System.loadLibrary). In order to make use of functions defined at a certain version of the JNI API, JNI_OnLoadmust return a constant defining at least that version.
Do you need to export JNI _ onload function?
In order to use any of the new JNI functions, a native library must export a JNI_OnLoad function that returns JNI_VERSION_1_2. If the native library does not export a JNI_OnLoad function, the VM assumes that the library only requires JNI version JNI_VERSION_1_1.
When does the VM call JNI _ onload?
The VM calls JNI_OnLoad when the native library is loaded (for example, through System.loadLibrary ). JNI_OnLoad must return the JNI version needed by the native library. In order to use any of the new JNI functions, a native library must export a JNI_OnLoad function that returns JNI_VERSION_1_2.
When the class loader containing a statically linked native library L is garbage collected, the VM will invoke the JNI_OnUnload_Lfunction of the library if such a function is exported. If a statically linked library L exports a function called JNI_OnUnload_Land a function called JNI_OnUnload, the JNI_OnUnloadfunction will be ignored.
The JNI interface pointer (JNIEnv) is valid only in the current thread. Should another thread need to access the Java VM, it must first call AttachCurrentThread()to attach itself to the VM and obtain a JNI interface pointer. Once attached to the VM, a native thread works just like an ordinary Java thread running inside a native method.
In order to use any of the new JNI functions, a native library must export a JNI_OnLoad function that returns JNI_VERSION_1_2. If the native library does not export a JNI_OnLoad function, the VM assumes that the library only requires JNI version JNI_VERSION_1_1.
JNI_OnLoad must return the JNI version needed by the native library. In order to use any of the new JNI functions, a native library must export a JNI_OnLoad function that returns JNI_VERSION_1_2.
Optional function defined by dynamically linked libraries. The VM calls JNI_OnLoadwhen the native library is loaded (for example, through System.loadLibrary). In order to make use of functions defined at a certain version of the JNI API, JNI_OnLoadmust return a constant defining at least that version.