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Implemented reference counted loading of gl library in java

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This commit is contained in:
Elias Naur 2004-07-05 14:34:47 +00:00
parent b07143f400
commit 1827f0efd4
8 changed files with 82 additions and 49 deletions
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45
src/java/org/lwjgl/opengl/GLContext.java
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@ -183,6 +183,8 @@ public final class GLContext {
/** Map of classes that have native stubs loaded */
private static Map exts;
private static int gl_ref_count = 0;
private static boolean did_auto_load = false;
static {
Sys.initialize();
@ -228,6 +230,8 @@ public final class GLContext {
public static synchronized void useContext(Object context) throws LWJGLException {
if (context == null) {
unloadStubs();
if (did_auto_load)
unloadOpenGLLibrary();
return;
}
// Is this the same as last time?
@ -238,11 +242,19 @@ public final class GLContext {
}
// Ok, now it's the current context.
loadOpenGLLibrary();
GL11.initNativeStubs();
loadStubs();
currentContext = new WeakReference(context);
VBOTracker.setCurrent(currentContext);
if (gl_ref_count == 0) {
loadOpenGLLibrary();
did_auto_load = true;
}
try {
GL11.initNativeStubs();
loadStubs();
currentContext = new WeakReference(context);
VBOTracker.setCurrent(currentContext);
} catch (LWJGLException e) {
if (did_auto_load)
unloadOpenGLLibrary();
}
}
private static void getExtensionClassesAndNames(Map exts, Set exts_names) {
@ -338,9 +350,28 @@ public final class GLContext {
}
/**
* Native method to load the OpenGL library
* If the OpenGL reference count is 0, the library is loaded. The
* reference count is then incremented.
*/
private static native void loadOpenGLLibrary();
public static void loadOpenGLLibrary() throws LWJGLException {
if (gl_ref_count == 0)
nLoadOpenGLLibrary();
gl_ref_count++;
}
private static native void nLoadOpenGLLibrary() throws LWJGLException;
/**
* The OpenGL library reference count is decremented, and if it
* reaches 0, the library is unloaded.
*/
public static void unloadOpenGLLibrary() {
gl_ref_count--;
if (gl_ref_count == 0)
nUnloadOpenGLLibrary();
}
private static native void nUnloadOpenGLLibrary();
/**
* Native method to clear native stub bindings