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use cell::UnsafeCell;
use libc;
use mem;
pub struct Mutex { inner: UnsafeCell<libc::pthread_mutex_t> }
#[inline]
pub unsafe fn raw(m: &Mutex) -> *mut libc::pthread_mutex_t {
m.inner.get()
}
unsafe impl Send for Mutex {}
unsafe impl Sync for Mutex {}
#[allow(dead_code)]
impl Mutex {
pub const fn new() -> Mutex {
Mutex { inner: UnsafeCell::new(libc::PTHREAD_MUTEX_INITIALIZER) }
}
#[inline]
pub unsafe fn init(&mut self) {
let mut attr: libc::pthread_mutexattr_t = mem::uninitialized();
let r = libc::pthread_mutexattr_init(&mut attr);
debug_assert_eq!(r, 0);
let r = libc::pthread_mutexattr_settype(&mut attr, libc::PTHREAD_MUTEX_NORMAL);
debug_assert_eq!(r, 0);
let r = libc::pthread_mutex_init(self.inner.get(), &attr);
debug_assert_eq!(r, 0);
let r = libc::pthread_mutexattr_destroy(&mut attr);
debug_assert_eq!(r, 0);
}
#[inline]
pub unsafe fn lock(&self) {
let r = libc::pthread_mutex_lock(self.inner.get());
debug_assert_eq!(r, 0);
}
#[inline]
pub unsafe fn unlock(&self) {
let r = libc::pthread_mutex_unlock(self.inner.get());
debug_assert_eq!(r, 0);
}
#[inline]
pub unsafe fn try_lock(&self) -> bool {
libc::pthread_mutex_trylock(self.inner.get()) == 0
}
#[inline]
#[cfg(not(target_os = "dragonfly"))]
pub unsafe fn destroy(&self) {
let r = libc::pthread_mutex_destroy(self.inner.get());
debug_assert_eq!(r, 0);
}
#[inline]
#[cfg(target_os = "dragonfly")]
pub unsafe fn destroy(&self) {
use libc;
let r = libc::pthread_mutex_destroy(self.inner.get());
debug_assert!(r == 0 || r == libc::EINVAL);
}
}
pub struct ReentrantMutex { inner: UnsafeCell<libc::pthread_mutex_t> }
unsafe impl Send for ReentrantMutex {}
unsafe impl Sync for ReentrantMutex {}
impl ReentrantMutex {
pub unsafe fn uninitialized() -> ReentrantMutex {
ReentrantMutex { inner: mem::uninitialized() }
}
pub unsafe fn init(&mut self) {
let mut attr: libc::pthread_mutexattr_t = mem::uninitialized();
let result = libc::pthread_mutexattr_init(&mut attr as *mut _);
debug_assert_eq!(result, 0);
let result = libc::pthread_mutexattr_settype(&mut attr as *mut _,
libc::PTHREAD_MUTEX_RECURSIVE);
debug_assert_eq!(result, 0);
let result = libc::pthread_mutex_init(self.inner.get(), &attr as *const _);
debug_assert_eq!(result, 0);
let result = libc::pthread_mutexattr_destroy(&mut attr as *mut _);
debug_assert_eq!(result, 0);
}
pub unsafe fn lock(&self) {
let result = libc::pthread_mutex_lock(self.inner.get());
debug_assert_eq!(result, 0);
}
#[inline]
pub unsafe fn try_lock(&self) -> bool {
libc::pthread_mutex_trylock(self.inner.get()) == 0
}
pub unsafe fn unlock(&self) {
let result = libc::pthread_mutex_unlock(self.inner.get());
debug_assert_eq!(result, 0);
}
pub unsafe fn destroy(&self) {
let result = libc::pthread_mutex_destroy(self.inner.get());
debug_assert_eq!(result, 0);
}
}