source: vbox/trunk/src/libs/xpcom18a4/xpcom/base/nsGarbageCollector.c@ 4837

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 * License.
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 * The Original Code is the Mozilla browser.
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 * The Initial Developer of the Original Code is
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 * Portions created by the Initial Developer are Copyright (C) 1999
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 * Contributor(s):
 *   Patrick Beard <beard@netscape.com>
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/*
        nsGarbageCollector.c
 */

#ifdef GC_LEAK_DETECTOR

/* for FILE */
#include <stdio.h>

/* NSPR stuff */
#include "generic_threads.h"
#include "prthread.h"
#include "prlock.h"

/* Linux/Win32 export private NSPR files to include/private */
#ifdef XP_MAC
#include "pprthred.h"
#else
#include "private/pprthred.h"
#endif

#include "nsLeakDetector.h"

extern FILE *GC_stdout, *GC_stderr;

extern void GC_gcollect(void);
extern void GC_clear_roots(void);

static PRStatus PR_CALLBACK scanner(PRThread* t, void** baseAddr, PRUword count, void* closure)
{
        char* begin = (char*)baseAddr;
        char* end = (char*)(baseAddr + count);
        GC_mark_range_proc marker = (GC_mark_range_proc) closure;
        marker(begin, end);
        return PR_SUCCESS;
}

static void mark_all_stacks(GC_mark_range_proc marker)
{
        /* PR_ThreadScanStackPointers(PR_GetCurrentThread(), &scanner, marker); */
        PR_ScanStackPointers(&scanner, (void *)marker);
}

static void locker(void* mutex)
{
        PR_Lock(mutex);
}

static void unlocker(void* mutex)
{
        PR_Unlock(mutex);
}

static void stopper(void* unused)
{
        PR_SuspendAll();
}

static void starter(void* unused)
{
        PR_ResumeAll();
}

nsresult NS_InitGarbageCollector()
{
        PRLock* mutex;
        
        /* redirect GC's stderr to catch startup leaks. */
        GC_stderr = fopen("StartupLeaks", "w");

        mutex = PR_NewLock();
        if (mutex == NULL)
                return NS_ERROR_FAILURE;
                
        GC_generic_init_threads(&mark_all_stacks, mutex,
                                                        &locker, &unlocker,
                                                        &stopper, &starter);
        
        return NS_OK;
}

nsresult NS_ShutdownGarbageCollector()
{
        /* do anything you need to shut down the collector. */
        return NS_OK;
}

#endif /* GC_LEAK_DETECTOR */