C++ (Cpp) qemu_chr_fe_claim示例

示例#1

文件： rng-egd.c 项目： sibiaoluo/qemu

static void rng_egd_opened(RngBackend *b, Error **errp)
{
    RngEgd *s = RNG_EGD(b);

    if (s->chr_name == NULL) {
        error_set(errp, QERR_INVALID_PARAMETER_VALUE,
                  "chardev", "a valid character device");
        return;
    }

    s->chr = qemu_chr_find(s->chr_name);
    if (s->chr == NULL) {
        error_set(errp, QERR_DEVICE_NOT_FOUND, s->chr_name);
        return;
    }

    if (qemu_chr_fe_claim(s->chr) != 0) {
        error_set(errp, QERR_DEVICE_IN_USE, s->chr_name);
        return;
    }

    /* FIXME we should resubmit pending requests when the CDS reconnects. */
    qemu_chr_add_handlers(s->chr, rng_egd_chr_can_read, rng_egd_chr_read,
                          NULL, s);
}

示例#2

文件： qdev-properties-system.c 项目： AdrianHuang/qemu

static int parse_chr(DeviceState *dev, const char *str, void **ptr)
{
    CharDriverState *chr = qemu_chr_find(str);
    if (chr == NULL) {
        return -ENOENT;
    }
    if (qemu_chr_fe_claim(chr) != 0) {
        return -EEXIST;
    }
    *ptr = chr;
    return 0;
}

示例#3

文件： qdev-properties-system.c 项目： GamerSource/qemu

static void parse_chr(DeviceState *dev, const char *str, void **ptr,
                      const char *propname, Error **errp)
{
    CharDriverState *chr = qemu_chr_find(str);
    if (chr == NULL) {
        error_setg(errp, "Property '%s.%s' can't find value '%s'",
                   object_get_typename(OBJECT(dev)), propname, str);
        return;
    }
    if (qemu_chr_fe_claim(chr) != 0) {
        error_setg(errp, "Property '%s.%s' can't take value '%s', it's in use",
                  object_get_typename(OBJECT(dev)), propname, str);
        return;
    }
    *ptr = chr;
}