Method startGCThread

vm/JavaAPI/src/java/lang/System.java:69–103

()

    private static boolean gcShouldLoop = true;
    // invoked from native code
    private static void startGCThread() {
        if(!startedGc) {
            startedGc = true;
            // not ideal but does the job for now, since gc is pretty efficient the cost is very low
            gcThreadInstance = new Thread("GC Thread") {
                public void run() {
                    synchronized(LOCK) {
                        // wait two seconds initially so startup won't be hindered by slow waits
                        try {
                            LOCK.wait(2000);
                        } catch (InterruptedException ex) {
                        }
                    }
                    gcShouldLoop = true;
                    while(gcShouldLoop) {
                        try {
                            System.gcMarkSweep();
                            synchronized(LOCK) {
                                if(forceGc || isHighFrequencyGC()) {
                                    forceGc = false;
                                    LOCK.wait(200);
                                } else {
                                    LOCK.wait(30000);
                                }
                            }
                        } catch (InterruptedException ex) {
                        }
                    }
                    startedGc = false;
                    gcThreadInstance = null;
                }
            };
            gcThreadInstance.start();
        }
    }

    /**
     * Invoked from native code