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use std::path::Path;
use ::device::{Device};
use ::handle::{Handle};
/// A libudev context.
pub struct Context {
udev: *mut ::ffi::udev
}
impl Drop for Context {
fn drop(&mut self) {
unsafe {
::ffi::udev_unref(self.udev);
}
}
}
#[doc(hidden)]
impl Handle<::ffi::udev> for Context {
fn as_ptr(&self) -> *mut ::ffi::udev {
self.udev
}
}
impl Context {
/// Creates a new context.
pub fn new() -> ::Result<Self> {
let ptr = try_alloc!(unsafe { ::ffi::udev_new() });
Ok(Context { udev: ptr })
}
/// Creates a device for a given syspath.
///
/// The `syspath` parameter should be a path to the device file within the `sysfs` file system,
/// e.g., `/sys/devices/virtual/tty/tty0`.
pub fn device_from_syspath(&self, syspath: &Path) -> ::Result<Device> {
let syspath = try!(::util::os_str_to_cstring(syspath));
let ptr = try_alloc!(unsafe {
::ffi::udev_device_new_from_syspath(self.udev, syspath.as_ptr())
});
Ok(::device::new(self, ptr))
}
}