C++ (Cpp) migrate_fd_put_buffer示例

示例#1

文件： migration.c 项目： JehandadKhan/dpdk-ovs

static ssize_t buffered_flush(MigrationState *s)
{
    size_t offset = 0;
    ssize_t ret = 0;

    DPRINTF("flushing %zu byte(s) of data\n", s->buffer_size);

    while (s->bytes_xfer < s->xfer_limit && offset < s->buffer_size) {
        size_t to_send = MIN(s->buffer_size - offset, s->xfer_limit - s->bytes_xfer);
        ret = migrate_fd_put_buffer(s, s->buffer + offset, to_send);
        if (ret <= 0) {
            DPRINTF("error flushing data, %zd\n", ret);
            break;
        } else {
            DPRINTF("flushed %zd byte(s)\n", ret);
            offset += ret;
            s->bytes_xfer += ret;
        }
    }

    DPRINTF("flushed %zu of %zu byte(s)\n", offset, s->buffer_size);
    memmove(s->buffer, s->buffer + offset, s->buffer_size - offset);
    s->buffer_size -= offset;

    if (ret < 0) {
        return ret;
    }
    return offset;
}

示例#2

文件： buffered_file.c 项目： npe9/qemu-acid

static ssize_t buffered_flush(QEMUFileBuffered *s)
{
    size_t offset = 0;
    ssize_t ret = 0;

    DPRINTF("flushing %zu byte(s) of data\n", s->buffer_size);

    while (s->bytes_xfer < s->xfer_limit && offset < s->buffer_size) {

        ret = migrate_fd_put_buffer(s->migration_state, s->buffer + offset,
                                    s->buffer_size - offset);
        if (ret == -EAGAIN) {
            DPRINTF("backend not ready, freezing\n");
            ret = 0;
            s->freeze_output = 1;
            break;
        }

        if (ret <= 0) {
            DPRINTF("error flushing data, %zd\n", ret);
            break;
        } else {
            DPRINTF("flushed %zd byte(s)\n", ret);
            offset += ret;
            s->bytes_xfer += ret;
        }
    }

    DPRINTF("flushed %zu of %zu byte(s)\n", offset, s->buffer_size);
    memmove(s->buffer, s->buffer + offset, s->buffer_size - offset);
    s->buffer_size -= offset;

    if (ret < 0) {
        return ret;
    }
    return offset;
}