C++ qemu_mallocz函数代码示例

void *ps2_kbd_init(void (*update_irq)(void *, int), void *update_arg)
{
    PS2KbdState *s = (PS2KbdState *)qemu_mallocz(sizeof(PS2KbdState));

    s->common.update_irq = update_irq;
    s->common.update_arg = update_arg;
    s->scancode_set = 2;
    ps2_reset(&s->common);
    register_savevm("ps2kbd", 0, 3, ps2_kbd_save, ps2_kbd_load, s);
    gui_register_dev_key_callback(ps2_put_keycode, s);
    qemu_register_reset(ps2_reset, &s->common);
    return s;
}

QEMUDeviceClass *qdev_new(const char *name, QDEVCreateFn create, int nirq)
{
    QEMUDeviceClass *dc = qemu_mallocz(sizeof(*dc));

    dc->num_irqs = nirq;
    dc->create = create;
    dc->name = qemu_strdup(name);

    dc->next = all_dc;
    all_dc = dc;

    return dc;
}

void *ps2_kbd_init(void (*update_irq)(void *, int), void *update_arg)
{
    PS2KbdState *s = (PS2KbdState *)qemu_mallocz(sizeof(PS2KbdState));
	TEMU_KbdState = s;

    s->common.update_irq = update_irq;
    s->common.update_arg = update_arg;
    ps2_reset(&s->common);
    register_savevm("ps2kbd", 0, 2, ps2_kbd_save, ps2_kbd_load, s);
    qemu_add_kbd_event_handler(ps2_put_keycode, s);
    qemu_register_reset(ps2_reset, &s->common);
    return s;
}

/* Initialize the MSI-X structures. Note: if MSI-X is supported, BAR size is
 * modified, it should be retrieved with msix_bar_size. */
int msix_init(struct PCIDevice *dev, unsigned short nentries,
              MemoryRegion *bar,
              unsigned bar_nr, unsigned bar_size)
{
    int ret;
    /* Nothing to do if MSI is not supported by interrupt controller */
    if (!msix_supported)
        return -ENOTSUP;

    if (nentries > MSIX_MAX_ENTRIES)
        return -EINVAL;

    dev->msix_entry_used = qemu_mallocz(MSIX_MAX_ENTRIES *
                                        sizeof *dev->msix_entry_used);

    dev->msix_table_page = qemu_mallocz(MSIX_PAGE_SIZE);
    msix_mask_all(dev, nentries);

    memory_region_init_io(&dev->msix_mmio, &msix_mmio_ops, dev,
                          "msix", MSIX_PAGE_SIZE);

    dev->msix_entries_nr = nentries;
    ret = msix_add_config(dev, nentries, bar_nr, bar_size);
    if (ret)
        goto err_config;

    dev->cap_present |= QEMU_PCI_CAP_MSIX;
    msix_mmio_setup(dev, bar);
    return 0;

err_config:
    dev->msix_entries_nr = 0;
    memory_region_destroy(&dev->msix_mmio);
    qemu_free(dev->msix_table_page);
    dev->msix_table_page = NULL;
    qemu_free(dev->msix_entry_used);
    dev->msix_entry_used = NULL;
    return ret;
}

UserDefTwo * qmp_user_def_cmd2(UserDefOne * ud1a, UserDefOne * ud1b, Error **errp)
{
    UserDefTwo *ret;
    UserDefOne *ud1c = qemu_mallocz(sizeof(UserDefOne));
    UserDefOne *ud1d = qemu_mallocz(sizeof(UserDefOne));

    ud1c->string = strdup(ud1a->string);
    ud1c->integer = ud1a->integer;
    ud1d->string = strdup(ud1b->string);
    ud1d->integer = ud1b->integer;

    ret = qemu_mallocz(sizeof(UserDefTwo));
    ret->string = strdup("blah1");
    ret->dict.string = strdup("blah2");
    ret->dict.dict.userdef = ud1c;
    ret->dict.dict.string = strdup("blah3");
    ret->dict.has_dict2 = true;
    ret->dict.dict2.userdef = ud1d;
    ret->dict.dict2.string = strdup("blah4");

    return ret;
}

void hostmem_init(HostMem *hostmem)
{
    memset(hostmem, 0, sizeof(*hostmem));

    qemu_mutex_init(&hostmem->mem_lock);

    hostmem->mem = qemu_mallocz(sizeof(*hostmem->mem));

    hostmem->client.set_memory = hostmem_client_set_memory;
    hostmem->client.sync_dirty_bitmap = hostmem_client_sync_dirty_bitmap;
    hostmem->client.migration_log = hostmem_client_migration_log;
    cpu_register_phys_memory_client(&hostmem->client);
}

MigrationState *exec_start_outgoing_migration(const char *command,
                                             int64_t bandwidth_limit,
                                             int detach)
{
    FdMigrationState *s;
    FILE *f;

    s = qemu_mallocz(sizeof(*s));

    f = popen(command, "w");
    if (f == NULL) {
        dprintf("Unable to popen exec target\n");
        goto err_after_alloc;
    }

    s->fd = fileno(f);
    if (s->fd == -1) {
        dprintf("Unable to retrieve file descriptor for popen'd handle\n");
        goto err_after_open;
    }

    if (fcntl(s->fd, F_SETFD, O_NONBLOCK) == -1) {
        dprintf("Unable to set nonblocking mode on file descriptor\n");
        goto err_after_open;
    }

    s->opaque = qemu_popen(f, "w");

    s->close = exec_close;
    s->get_error = file_errno;
    s->write = file_write;
    s->mig_state.cancel = migrate_fd_cancel;
    s->mig_state.get_status = migrate_fd_get_status;
    s->mig_state.release = migrate_fd_release;

    s->state = MIG_STATE_ACTIVE;
    s->mon_resume = NULL;
    s->bandwidth_limit = bandwidth_limit;

    if (!detach)
        migrate_fd_monitor_suspend(s);

    migrate_fd_connect(s);
    return &s->mig_state;

err_after_open:
    pclose(f);
err_after_alloc:
    qemu_free(s);
    return NULL;
}

void *load_device_tree(const char *filename_path, void *load_addr)
{
    int dt_file_size;
    int dt_file_load_size;
    int new_dt_size;
    int ret;
    void *dt_file = NULL;
    void *fdt;

    dt_file_size = get_image_size(filename_path);
    if (dt_file_size < 0) {
        printf("Unable to get size of device tree file '%s'\n",
            filename_path);
        goto fail;
    }

    /* First allocate space in qemu for device tree */
    dt_file = qemu_mallocz(dt_file_size);
    if (dt_file == NULL) {
        printf("Unable to allocate memory in qemu for device tree\n");
        goto fail;
    }

    dt_file_load_size = load_image(filename_path, dt_file);

    /* Second we place new copy of 2x size in guest memory
     * This give us enough room for manipulation.
     */
    new_dt_size = dt_file_size * 2;

    fdt = load_addr;
    ret = fdt_open_into(dt_file, fdt, new_dt_size);
    if (ret) {
        printf("Unable to copy device tree in memory\n");
        goto fail;
    }

    /* Check sanity of device tree */
    if (fdt_check_header(fdt)) {
        printf ("Device tree file loaded into memory is invalid: %s\n",
            filename_path);
        goto fail;
    }
    /* free qemu memory with old device tree */
    qemu_free(dt_file);
    return fdt;

fail:
    qemu_free(dt_file);
    return NULL;
}

/* initialize the QFB device */
void nand_dev_init(uint32_t base)
{
    int iomemtype;
    static int  instance_id = 0;
    nand_dev_controller_state *s;

    s = (nand_dev_controller_state *)qemu_mallocz(sizeof(nand_dev_controller_state));
    iomemtype = cpu_register_io_memory(nand_dev_readfn, nand_dev_writefn, s);
    cpu_register_physical_memory(base, 0x00000fff, iomemtype);
    s->base = base;

    register_savevm( "nand_dev", instance_id++, NAND_DEV_STATE_SAVE_VERSION,
                      nand_dev_controller_state_save, nand_dev_controller_state_load, s);
}

static QEMUClock *qemu_new_clock(int type)
{
    QEMUClock *clock;

    clock = qemu_mallocz(sizeof(QEMUClock));
    clock->type = type;
    clock->enabled = 1;
    notifier_list_init(&clock->reset_notifiers);
    /* required to detect & report backward jumps */
    if (type == QEMU_CLOCK_HOST) {
        clock->last = get_clock_realtime();
    }
    return clock;
}

static qemu_irq *r2d_fpga_init(target_phys_addr_t base, qemu_irq irl)
{
    int iomemtype;
    r2d_fpga_t *s;

    s = qemu_mallocz(sizeof(r2d_fpga_t));

    s->irl = irl;

    iomemtype = cpu_register_io_memory(r2d_fpga_readfn,
				       r2d_fpga_writefn, s);
    cpu_register_physical_memory(base, 0x40, iomemtype);
    return qemu_allocate_irqs(r2d_fpga_irq_set, s, NR_IRQS);
}

static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable)
{
    QEMUFileBdrv *s;

    s = qemu_mallocz(sizeof(QEMUFileBdrv));

    s->bs = bs;
    s->base_offset = offset;

    if (is_writable)
        return qemu_fopen_ops(s, block_put_buffer, NULL, bdrv_fclose, NULL, NULL);

    return qemu_fopen_ops(s, NULL, block_get_buffer, bdrv_fclose, NULL, NULL);
}

static void syborg_int_init(SysBusDevice *dev)
{
    SyborgIntState *s = FROM_SYSBUS(SyborgIntState, dev);
    int iomemtype;

    sysbus_init_irq(dev, &s->parent_irq);
    qdev_init_gpio_in(&dev->qdev, syborg_int_set_irq, s->num_irqs);
    iomemtype = cpu_register_io_memory(syborg_int_readfn,
                                       syborg_int_writefn, s);
    sysbus_init_mmio(dev, 0x1000, iomemtype);
    s->flags = qemu_mallocz(s->num_irqs * sizeof(syborg_int_flags));

    register_savevm("syborg_int", -1, 1, syborg_int_save, syborg_int_load, s);
}

static arm_timer_state *arm_timer_init(uint32_t freq)
{
    arm_timer_state *s;
    QEMUBH *bh;

    s = (arm_timer_state *)qemu_mallocz(sizeof(arm_timer_state));
    s->freq = freq;
    s->control = TIMER_CTRL_IE;

    bh = qemu_bh_new(arm_timer_tick, s);
    s->timer = ptimer_init(bh);
    register_savevm("arm_timer", -1, 1, arm_timer_save, arm_timer_load, s);
    return s;
}

MigrationState *fd_start_outgoing_migration(Monitor *mon,
					    const char *fdname,
					    int64_t bandwidth_limit,
					    int detach,
					    int blk,
					    int inc)
{
    FdMigrationState *s;

    s = qemu_mallocz(sizeof(*s));

    s->fd = monitor_get_fd(mon, fdname);
    if (s->fd == -1) {
        DPRINTF("fd_migration: invalid file descriptor identifier\n");
        goto err_after_alloc;
    }

    if (fcntl(s->fd, F_SETFL, O_NONBLOCK) == -1) {
        DPRINTF("Unable to set nonblocking mode on file descriptor\n");
        goto err_after_open;
    }

    s->get_error = fd_errno;
    s->write = fd_write;
    s->close = fd_close;
    s->mig_state.cancel = migrate_fd_cancel;
    s->mig_state.get_status = migrate_fd_get_status;
    s->mig_state.release = migrate_fd_release;

    s->mig_state.blk = blk;
    s->mig_state.shared = inc;

    s->state = MIG_STATE_ACTIVE;
    s->mon = NULL;
    s->bandwidth_limit = bandwidth_limit;

    if (!detach) {
        migrate_fd_monitor_suspend(s, mon);
    }

    migrate_fd_connect(s);
    return &s->mig_state;

err_after_open:
    close(s->fd);
err_after_alloc:
    qemu_free(s);
    return NULL;
}