C++ (Cpp) km_alloc_virtual Examples

Example #1

File: valloc.c Project: a781947241/GridOS

bool __init km_valloc_init()
{
	kernel_vm_object = km_alloc_virtual(KE_VIRTUAL_MEMORY_SIZE, KM_PROT_READ | KM_PROT_WRITE, NULL);
	if (!kernel_vm_object)
		goto err;
	
	spin_lock_init(&kernel_vm_object_lock);
	memalloc_init_allocation(kernel_vm_object, KE_VIRTUAL_MEMORY_SIZE);
	return true;
	
err:
	return false;
}

Example #2

File: block.c Project: hxhlb/GridOS

/**
	@brief DB cache初始化
*/
bool fss_db_init(void)
{
    int i = 0;
    struct dbd *dbd_prev = NULL;

    cache_desc()->cache_size = FSS_CACHE_SIZE;
    cache_desc()->db_count = cache_desc()->cache_size / FSS_CACHE_DB_SIZE;

    /* The db virtual memory */
#ifdef _MSC_VER
    cache_desc()->db_cache = (char*)malloc(cache_desc()->cache_size);
#else
    cache_desc()->db_cache = km_alloc_virtual(cache_desc()->cache_size, KM_PROT_READ | KM_PROT_WRITE);
    printf("fss_db_cache = %x", cache_desc()->db_cache);
#endif
    if (cache_desc()->db_cache == NULL)
        goto err1;

    /* 分配DB栈 */
#ifdef _MSC_VER
    cache_desc()->db_stack = (unsigned long *)malloc(cache_desc()->db_count * sizeof(unsigned long));
#else
    cache_desc()->db_stack = (unsigned long *)km_valloc(cache_desc()->db_count * sizeof(unsigned long));
    printf(", fss_db_stack = %x.\n", cache_desc()->db_stack);
#endif
    if (cache_desc()->db_stack == NULL)
        goto err2;

    /* DB节点入栈 */
    for (i = 0; i < cache_desc()->db_count; i++)
        cache_desc()->db_stack[i] = (unsigned long)cache_desc()->db_cache + (i * FSS_CACHE_DB_SIZE);
    cache_desc()->db_stack_top = cache_desc()->db_count - 1;

    /* 分配DBD */
#ifdef _MSC_VER
    cache_desc()->dbd_cache = (struct dbd*)malloc((cache_desc()->db_count) * sizeof(struct dbd));
#else
    cache_desc()->dbd_cache = (struct dbd*)km_valloc((cache_desc()->db_count) * sizeof(struct dbd));
#endif
    if (cache_desc()->dbd_cache == NULL)
        goto err3;

    /* DBD节点入栈 */
    dbd_prev = NULL;
    for (i = 0; i < (cache_desc()->db_count); i++)
    {
        cache_desc()->dbd_stack_top = &(cache_desc()->dbd_cache[i]);
        cache_desc()->dbd_stack_top->buffer = NULL;
        cache_desc()->dbd_stack_top->list.prev = (void*)dbd_prev;
        dbd_prev = cache_desc()->dbd_stack_top;
    }
    ke_spin_init(&cache_desc()->db_stack_lock);
    ke_spin_init(&cache_desc()->dbd_stack_lock);
    ke_spin_init(&cache_desc()->dirty_list_lock);

    INIT_LIST_HEAD(&cache_desc()->sort_list);
    INIT_LIST_HEAD(&cache_desc()->dirty_list);
    ke_spin_init(&cache_desc()->sort_lock);

    //TODO:
    //Write back thread
    return true;

err3:
    km_vfree(cache_desc()->db_stack);
err2:
    km_dealloc_virtual(cache_desc()->db_cache);
    cache_desc()->db_count = 0;
err1:
    return false;
}