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use crate::cell::UnsafeCell;
use crate::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) {
        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);
    }
}