root/Whitix/trunk/kernel/gc.c

/*  This file is part of Whitix.
 *
 *  Whitix is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  Whitix is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Whitix; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include <error.h> 

/* System calls */

/* SysGcCreate

 * Create a GC collection thread, using an already created thread to call gcFree
 * with. This garbage collection thread calls GcCollect when it thinks a collection
 * should happen (time or memory pressure), sets a GC flag on the process (which means that no other threads)
 * will be scheduled, and waits on a waitqueue while no other thread from the same
 * process is being scheduled.
 *
 * It then runs the kernel garbage collector (mark and sweep),
 * which then returns to userspace
 * to call gcFree, and then returns, making sure threads from the same process
 * can schedule again.
 *
 * Different algorithms can be selected via SysGcControl
 */

int SysGcCreate(int threadId, void (*gcFree)(void* freeList, int items), int type)
{
        return -ENOTIMPL;
}

int SysGcControl(int command, void* type)
{
        return -ENOTIMPL;
}

int SysGcCollect()
{
        return -ENOTIMPL;
}

int SysGcClose()
{
        return 0;
}

int GcInit()
{
        return 0;
}