// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License..

#![allow(dead_code)] // not used on all platforms

use crate::mem;
use sgx_libc as libc;

pub type Key = libc::pthread_key_t;

#[inline]
pub unsafe fn create(dtor: Option<unsafe extern "C" fn(*mut u8)>) -> Key {
    let mut key = 0;
    assert_eq!(libc::pthread_key_create(&mut key, mem::transmute(dtor)), 0);
    key
}

#[inline]
pub unsafe fn set(key: Key, value: *mut u8) {
    let r = libc::pthread_setspecific(key, value as *mut _);
    debug_assert_eq!(r, 0);
}

#[inline]
pub unsafe fn get(key: Key) -> *mut u8 {
    libc::pthread_getspecific(key) as *mut u8
}

#[inline]
pub unsafe fn destroy(key: Key) {
    let r = libc::pthread_key_delete(key);
    debug_assert_eq!(r, 0);
}

#[inline]
pub fn requires_synchronized_create() -> bool {
    false
}