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use crate::{ error::{LockType, LocksmithError, LocksmithErrorKind, LocksmithResult}, locksmith::{ common::LOCK_TIMEOUT, guard::{HcMutexGuard, HcRwLockReadGuard, HcRwLockWriteGuard}, }, }; use parking_lot::{Mutex, MutexGuard, RwLock, RwLockReadGuard, RwLockWriteGuard}; use std::time::{Duration, Instant}; #[derive(Debug)] pub struct HcMutex<T: ?Sized> { fair_unlocking: bool, inner: Mutex<T>, } impl<T> HcMutex<T> { pub fn new(v: T) -> Self { Self { fair_unlocking: false, inner: Mutex::new(v), } } pub fn new_with_fair_unlocking(v: T) -> Self { Self { fair_unlocking: true, inner: Mutex::new(v), } } pub fn use_fair_unlocking(mut self) -> Self { self.fair_unlocking = true; self } } #[derive(Debug)] pub struct HcRwLock<T: ?Sized> { fair_unlocking: bool, inner: RwLock<T>, } impl<T> HcRwLock<T> { pub fn new(v: T) -> Self { Self { fair_unlocking: false, inner: RwLock::new(v), } } pub fn new_with_fair_unlocking(v: T) -> Self { Self { fair_unlocking: true, inner: RwLock::new(v), } } pub fn use_fair_unlocking(mut self) -> Self { self.fair_unlocking = true; self } } macro_rules! mutex_impl { ($HcMutex: ident, $Mutex: ident, $HcGuard:ident, $Guard:ident, $lock_type:ident, $lock_fn:ident, $try_lock_fn:ident, $try_lock_for_fn:ident, $try_lock_until_fn:ident, $new_guard_fn:ident) => { impl<T: ?Sized> $HcMutex<T> { pub fn $lock_fn(&self) -> LocksmithResult<$HcGuard<T>> { self.$try_lock_for_fn(*LOCK_TIMEOUT).ok_or_else(|| { LocksmithError::new(LockType::$lock_type, LocksmithErrorKind::LocksmithTimeout) }) } pub fn $try_lock_for_fn(&self, duration: Duration) -> Option<$HcGuard<T>> { self.inner .$try_lock_for_fn(duration) .map(|g| self.$new_guard_fn(g)) } pub fn $try_lock_until_fn(&self, instant: Instant) -> Option<$HcGuard<T>> { self.inner .$try_lock_until_fn(instant) .map(|g| self.$new_guard_fn(g)) } pub fn $try_lock_fn(&self) -> Option<$HcGuard<T>> { (*self).inner.$try_lock_fn().map(|g| self.$new_guard_fn(g)) } fn $new_guard_fn<'a>(&self, inner: $Guard<'a, T>) -> $HcGuard<'a, T> { if self.fair_unlocking { $HcGuard::new(inner).use_fair_unlocking() } else { $HcGuard::new(inner) } } } }; } mutex_impl!( HcMutex, Mutex, HcMutexGuard, MutexGuard, Lock, lock, try_lock, try_lock_for, try_lock_until, new_guard ); mutex_impl!( HcRwLock, RwLock, HcRwLockReadGuard, RwLockReadGuard, Read, read, try_read, try_read_for, try_read_until, new_guard_read ); mutex_impl!( HcRwLock, RwLock, HcRwLockWriteGuard, RwLockWriteGuard, Write, write, try_write, try_write_for, try_write_until, new_guard_write );