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package org.netbeans.lib.profiler.server;


/**
 * This class contains instrumentation methods for object allocation profiling.
 *
 * @author Misha Dmitriev
 */
public class ProfilerRuntimeObjAlloc extends ProfilerRuntimeMemory {
    //~ Static fields/initializers -----------------------------------------------------------------------------------------------

    protected static boolean objAllocProfilingDisabled = true;

    //~ Methods ------------------------------------------------------------------------------------------------------------------

    public static void enableProfiling(boolean v) {
        if (!v) {
            objAllocProfilingDisabled = true;
        }

        if (v) {
            createNewDataStructures();
            ProfilerRuntimeMemory.enableProfiling(v);
        } else {
            ProfilerRuntimeMemory.enableProfiling(v);

            // Give the threads that are currently executing instrumentation enough time to finish
            // before we nullify the data structures that are used in instrumentation code.
            try {
                Thread.sleep(100);
            } catch (Exception ex) {
            }

            clearDataStructures();
        }

        if (v) {
            objAllocProfilingDisabled = false;
        }
    }

    public static void traceObjAlloc(Object object, char classId) {
        if (objAllocProfilingDisabled) {
            return;
        }

        if (ThreadInfo.profilingSuspended() || ThreadInfo.isCurrentThreadProfilerServerThread()) {
            // Avoid counting objects allocated by our own agent threads, or by this method's callees
            return;
        }

        ThreadInfo ti = ThreadInfo.getThreadInfo();

        if (ti.inProfilingRuntimeMethod > 0) {
            return;
        }

        if (!ti.isInitialized()) {
            ti.initialize(true);
        }

        ti.inProfilingRuntimeMethod++;

        // See comment marked with (***) in ProfilerRuntimeCPUFullInstr
        int classInt = classId&0xff;
        classInt |= classId&0xff00;

        synchronized (allocatedInstancesCount) {
            allocatedInstancesCount[classInt]++;
        }

        if (allocatedInstThreshold[classInt] <= 0) {
            long objSize = getCachedObjectSize(classInt, object);
            getAndSendCurrentStackTrace(classId, objSize);
            allocatedInstThreshold[classInt] = nextRandomizedInterval();
        }

        allocatedInstThreshold[classInt]--;
        ti.inProfilingRuntimeMethod--;
    }

    protected static void clearDataStructures() {
        ProfilerRuntimeMemory.clearDataStructures();
    }

    protected static void createNewDataStructures() {
        ProfilerRuntimeMemory.createNewDataStructures();
    }
}
