54 lines
1.7 KiB
Rust
54 lines
1.7 KiB
Rust
// Copyright 2013 The Servo Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! An immutable bag of elements.
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pub use core_foundation_sys::set::*;
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use core_foundation_sys::base::{CFTypeRef, CFRelease, kCFAllocatorDefault};
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use base::{CFIndexConvertible, TCFType};
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use std::os::raw::c_void;
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use std::marker::PhantomData;
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/// An immutable bag of elements.
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pub struct CFSet<T = *const c_void>(CFSetRef, PhantomData<T>);
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impl<T> Drop for CFSet<T> {
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fn drop(&mut self) {
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unsafe { CFRelease(self.as_CFTypeRef()) }
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}
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}
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impl_TCFType!(CFSet<T>, CFSetRef, CFSetGetTypeID);
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impl_CFTypeDescription!(CFSet);
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impl CFSet {
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/// Creates a new set from a list of `CFType` instances.
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pub fn from_slice<T>(elems: &[T]) -> CFSet<T> where T: TCFType {
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unsafe {
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let elems: Vec<CFTypeRef> = elems.iter().map(|elem| elem.as_CFTypeRef()).collect();
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let set_ref = CFSetCreate(kCFAllocatorDefault,
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elems.as_ptr(),
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elems.len().to_CFIndex(),
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&kCFTypeSetCallBacks);
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TCFType::wrap_under_create_rule(set_ref)
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}
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}
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}
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impl<T> CFSet<T> {
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/// Get the number of elements in the CFSet
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pub fn len(&self) -> usize {
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unsafe {
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CFSetGetCount(self.0) as usize
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}
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}
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}
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