63 lines
1.6 KiB
Rust
63 lines
1.6 KiB
Rust
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use std::ops::{Deref, DerefMut};
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use super::*;
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pub struct XSmartPointer<'a, T> {
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xconn: &'a XConnection,
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pub ptr: *mut T,
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}
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impl<'a, T> XSmartPointer<'a, T> {
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// You're responsible for only passing things to this that should be XFree'd.
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// Returns None if ptr is null.
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pub fn new(xconn: &'a XConnection, ptr: *mut T) -> Option<Self> {
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if !ptr.is_null() {
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Some(XSmartPointer {
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xconn,
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ptr,
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})
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} else {
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None
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}
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}
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}
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impl<'a, T> Deref for XSmartPointer<'a, T> {
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type Target = T;
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fn deref(&self) -> &T {
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unsafe { &*self.ptr }
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}
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}
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impl<'a, T> DerefMut for XSmartPointer<'a, T> {
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fn deref_mut(&mut self) -> &mut T {
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unsafe { &mut *self.ptr }
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}
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}
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impl<'a, T> Drop for XSmartPointer<'a, T> {
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fn drop(&mut self) {
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unsafe {
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(self.xconn.xlib.XFree)(self.ptr as *mut _);
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}
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}
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}
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impl XConnection {
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pub fn alloc_class_hint(&self) -> XSmartPointer<ffi::XClassHint> {
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XSmartPointer::new(self, unsafe { (self.xlib.XAllocClassHint)() })
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.expect("`XAllocClassHint` returned null; out of memory")
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}
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pub fn alloc_size_hints(&self) -> XSmartPointer<ffi::XSizeHints> {
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XSmartPointer::new(self, unsafe { (self.xlib.XAllocSizeHints)() })
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.expect("`XAllocSizeHints` returned null; out of memory")
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}
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pub fn alloc_wm_hints(&self) -> XSmartPointer<ffi::XWMHints> {
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XSmartPointer::new(self, unsafe { (self.xlib.XAllocWMHints)() })
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.expect("`XAllocWMHints` returned null; out of memory")
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}
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}
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