diff options
Diffstat (limited to 'library/std/tests/sync/mutex.rs')
| -rw-r--r-- | library/std/tests/sync/mutex.rs | 525 |
1 files changed, 328 insertions, 197 deletions
diff --git a/library/std/tests/sync/mutex.rs b/library/std/tests/sync/mutex.rs index ac82914d6de..90cefc0d594 100644 --- a/library/std/tests/sync/mutex.rs +++ b/library/std/tests/sync/mutex.rs @@ -6,7 +6,71 @@ use std::sync::mpsc::channel; use std::sync::{Arc, Condvar, MappedMutexGuard, Mutex, MutexGuard, TryLockError}; use std::{hint, mem, thread}; -struct Packet<T>(Arc<(Mutex<T>, Condvar)>); +//////////////////////////////////////////////////////////////////////////////////////////////////// +// Nonpoison & Poison Tests +//////////////////////////////////////////////////////////////////////////////////////////////////// +use super::nonpoison_and_poison_unwrap_test; + +nonpoison_and_poison_unwrap_test!( + name: smoke, + test_body: { + use locks::Mutex; + + let m = Mutex::new(()); + drop(maybe_unwrap(m.lock())); + drop(maybe_unwrap(m.lock())); + } +); + +nonpoison_and_poison_unwrap_test!( + name: lots_and_lots, + test_body: { + use locks::Mutex; + + const J: u32 = 1000; + const K: u32 = 3; + + let m = Arc::new(Mutex::new(0)); + + fn inc(m: &Mutex<u32>) { + for _ in 0..J { + *maybe_unwrap(m.lock()) += 1; + } + } + + let (tx, rx) = channel(); + for _ in 0..K { + let tx2 = tx.clone(); + let m2 = m.clone(); + thread::spawn(move || { + inc(&m2); + tx2.send(()).unwrap(); + }); + let tx2 = tx.clone(); + let m2 = m.clone(); + thread::spawn(move || { + inc(&m2); + tx2.send(()).unwrap(); + }); + } + + drop(tx); + for _ in 0..2 * K { + rx.recv().unwrap(); + } + assert_eq!(*maybe_unwrap(m.lock()), J * K * 2); + } +); + +nonpoison_and_poison_unwrap_test!( + name: try_lock, + test_body: { + use locks::Mutex; + + let m = Mutex::new(()); + *m.try_lock().unwrap() = (); + } +); #[derive(Eq, PartialEq, Debug)] struct NonCopy(i32); @@ -26,58 +90,278 @@ fn test_needs_drop() { assert!(mem::needs_drop::<NonCopyNeedsDrop>()); } -#[derive(Clone, Eq, PartialEq, Debug)] -struct Cloneable(i32); +nonpoison_and_poison_unwrap_test!( + name: test_into_inner, + test_body: { + use locks::Mutex; -#[test] -fn smoke() { - let m = Mutex::new(()); - drop(m.lock().unwrap()); - drop(m.lock().unwrap()); -} + let m = Mutex::new(NonCopy(10)); + assert_eq!(maybe_unwrap(m.into_inner()), NonCopy(10)); + } +); -#[test] -fn lots_and_lots() { - const J: u32 = 1000; - const K: u32 = 3; +nonpoison_and_poison_unwrap_test!( + name: test_into_inner_drop, + test_body: { + use locks::Mutex; - let m = Arc::new(Mutex::new(0)); + struct Foo(Arc<AtomicUsize>); + impl Drop for Foo { + fn drop(&mut self) { + self.0.fetch_add(1, Ordering::SeqCst); + } + } - fn inc(m: &Mutex<u32>) { - for _ in 0..J { - *m.lock().unwrap() += 1; + let num_drops = Arc::new(AtomicUsize::new(0)); + let m = Mutex::new(Foo(num_drops.clone())); + assert_eq!(num_drops.load(Ordering::SeqCst), 0); + { + let _inner = maybe_unwrap(m.into_inner()); + assert_eq!(num_drops.load(Ordering::SeqCst), 0); } + assert_eq!(num_drops.load(Ordering::SeqCst), 1); } +); - let (tx, rx) = channel(); - for _ in 0..K { - let tx2 = tx.clone(); - let m2 = m.clone(); - thread::spawn(move || { - inc(&m2); - tx2.send(()).unwrap(); - }); - let tx2 = tx.clone(); - let m2 = m.clone(); - thread::spawn(move || { - inc(&m2); - tx2.send(()).unwrap(); - }); +nonpoison_and_poison_unwrap_test!( + name: test_get_mut, + test_body: { + use locks::Mutex; + + let mut m = Mutex::new(NonCopy(10)); + *maybe_unwrap(m.get_mut()) = NonCopy(20); + assert_eq!(maybe_unwrap(m.into_inner()), NonCopy(20)); } +); - drop(tx); - for _ in 0..2 * K { - rx.recv().unwrap(); +nonpoison_and_poison_unwrap_test!( + name: test_get_cloned, + test_body: { + use locks::Mutex; + + #[derive(Clone, Eq, PartialEq, Debug)] + struct Cloneable(i32); + + let m = Mutex::new(Cloneable(10)); + + assert_eq!(maybe_unwrap(m.get_cloned()), Cloneable(10)); } - assert_eq!(*m.lock().unwrap(), J * K * 2); -} +); + +nonpoison_and_poison_unwrap_test!( + name: test_set, + test_body: { + use locks::Mutex; + + fn inner<T>(mut init: impl FnMut() -> T, mut value: impl FnMut() -> T) + where + T: Debug + Eq, + { + let m = Mutex::new(init()); + + assert_eq!(*maybe_unwrap(m.lock()), init()); + maybe_unwrap(m.set(value())); + assert_eq!(*maybe_unwrap(m.lock()), value()); + } + + inner(|| NonCopy(10), || NonCopy(20)); + inner(|| NonCopyNeedsDrop(10), || NonCopyNeedsDrop(20)); + } +); + +// Ensure that old values that are replaced by `set` are correctly dropped. +nonpoison_and_poison_unwrap_test!( + name: test_set_drop, + test_body: { + use locks::Mutex; + + struct Foo(Arc<AtomicUsize>); + impl Drop for Foo { + fn drop(&mut self) { + self.0.fetch_add(1, Ordering::SeqCst); + } + } + + let num_drops = Arc::new(AtomicUsize::new(0)); + let m = Mutex::new(Foo(num_drops.clone())); + assert_eq!(num_drops.load(Ordering::SeqCst), 0); + + let different = Foo(Arc::new(AtomicUsize::new(42))); + maybe_unwrap(m.set(different)); + assert_eq!(num_drops.load(Ordering::SeqCst), 1); + } +); + +nonpoison_and_poison_unwrap_test!( + name: test_replace, + test_body: { + use locks::Mutex; + + fn inner<T>(mut init: impl FnMut() -> T, mut value: impl FnMut() -> T) + where + T: Debug + Eq, + { + let m = Mutex::new(init()); + + assert_eq!(*maybe_unwrap(m.lock()), init()); + assert_eq!(maybe_unwrap(m.replace(value())), init()); + assert_eq!(*maybe_unwrap(m.lock()), value()); + } + inner(|| NonCopy(10), || NonCopy(20)); + inner(|| NonCopyNeedsDrop(10), || NonCopyNeedsDrop(20)); + } +); + +// FIXME(nonpoison_condvar): Move this to the `condvar.rs` test file once `nonpoison::condvar` gets +// implemented. #[test] -fn try_lock() { - let m = Mutex::new(()); - *m.try_lock().unwrap() = (); +fn test_mutex_arc_condvar() { + struct Packet<T>(Arc<(Mutex<T>, Condvar)>); + + let packet = Packet(Arc::new((Mutex::new(false), Condvar::new()))); + let packet2 = Packet(packet.0.clone()); + + let (tx, rx) = channel(); + + let _t = thread::spawn(move || { + // Wait until our parent has taken the lock. + rx.recv().unwrap(); + let &(ref lock, ref cvar) = &*packet2.0; + + // Set the data to `true` and wake up our parent. + let mut guard = lock.lock().unwrap(); + *guard = true; + cvar.notify_one(); + }); + + let &(ref lock, ref cvar) = &*packet.0; + let mut guard = lock.lock().unwrap(); + // Wake up our child. + tx.send(()).unwrap(); + + // Wait until our child has set the data to `true`. + assert!(!*guard); + while !*guard { + guard = cvar.wait(guard).unwrap(); + } } +nonpoison_and_poison_unwrap_test!( + name: test_mutex_arc_nested, + test_body: { + use locks::Mutex; + + // Tests nested mutexes and access + // to underlying data. + let arc = Arc::new(Mutex::new(1)); + let arc2 = Arc::new(Mutex::new(arc)); + let (tx, rx) = channel(); + let _t = thread::spawn(move || { + let lock = maybe_unwrap(arc2.lock()); + let lock2 = maybe_unwrap(lock.lock()); + assert_eq!(*lock2, 1); + tx.send(()).unwrap(); + }); + rx.recv().unwrap(); + } +); + +nonpoison_and_poison_unwrap_test!( + name: test_mutex_unsized, + test_body: { + use locks::Mutex; + + let mutex: &Mutex<[i32]> = &Mutex::new([1, 2, 3]); + { + let b = &mut *maybe_unwrap(mutex.lock()); + b[0] = 4; + b[2] = 5; + } + let comp: &[i32] = &[4, 2, 5]; + assert_eq!(&*maybe_unwrap(mutex.lock()), comp); + } +); + +nonpoison_and_poison_unwrap_test!( + name: test_mapping_mapped_guard, + test_body: { + use locks::{Mutex, MutexGuard, MappedMutexGuard}; + + let arr = [0; 4]; + let lock = Mutex::new(arr); + let guard = maybe_unwrap(lock.lock()); + let guard = MutexGuard::map(guard, |arr| &mut arr[..2]); + let mut guard = MappedMutexGuard::map(guard, |slice| &mut slice[1..]); + assert_eq!(guard.len(), 1); + guard[0] = 42; + drop(guard); + assert_eq!(*maybe_unwrap(lock.lock()), [0, 42, 0, 0]); + } +); + +#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")] +nonpoison_and_poison_unwrap_test!( + name: test_panics, + test_body: { + use locks::Mutex; + + let mutex = Mutex::new(42); + + let catch_unwind_result1 = panic::catch_unwind(AssertUnwindSafe(|| { + let _guard1 = maybe_unwrap(mutex.lock()); + + panic!("test panic with mutex once"); + })); + assert!(catch_unwind_result1.is_err()); + + let catch_unwind_result2 = panic::catch_unwind(AssertUnwindSafe(|| { + let _guard2 = maybe_unwrap(mutex.lock()); + + panic!("test panic with mutex twice"); + })); + assert!(catch_unwind_result2.is_err()); + + let catch_unwind_result3 = panic::catch_unwind(AssertUnwindSafe(|| { + let _guard3 = maybe_unwrap(mutex.lock()); + + panic!("test panic with mutex thrice"); + })); + assert!(catch_unwind_result3.is_err()); + } +); + +#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")] +nonpoison_and_poison_unwrap_test!( + name: test_mutex_arc_access_in_unwind, + test_body: { + use locks::Mutex; + + let arc = Arc::new(Mutex::new(1)); + let arc2 = arc.clone(); + let _ = thread::spawn(move || -> () { + struct Unwinder { + i: Arc<Mutex<i32>>, + } + impl Drop for Unwinder { + fn drop(&mut self) { + *maybe_unwrap(self.i.lock()) += 1; + } + } + let _u = Unwinder { i: arc2 }; + panic!(); + }) + .join(); + let lock = maybe_unwrap(arc.lock()); + assert_eq!(*lock, 2); + } +); + +//////////////////////////////////////////////////////////////////////////////////////////////////// +// Poison Tests +//////////////////////////////////////////////////////////////////////////////////////////////////// + +/// Creates a mutex that is immediately poisoned. fn new_poisoned_mutex<T>(value: T) -> Mutex<T> { let mutex = Mutex::new(value); @@ -94,30 +378,6 @@ fn new_poisoned_mutex<T>(value: T) -> Mutex<T> { } #[test] -fn test_into_inner() { - let m = Mutex::new(NonCopy(10)); - assert_eq!(m.into_inner().unwrap(), NonCopy(10)); -} - -#[test] -fn test_into_inner_drop() { - struct Foo(Arc<AtomicUsize>); - impl Drop for Foo { - fn drop(&mut self) { - self.0.fetch_add(1, Ordering::SeqCst); - } - } - let num_drops = Arc::new(AtomicUsize::new(0)); - let m = Mutex::new(Foo(num_drops.clone())); - assert_eq!(num_drops.load(Ordering::SeqCst), 0); - { - let _inner = m.into_inner().unwrap(); - assert_eq!(num_drops.load(Ordering::SeqCst), 0); - } - assert_eq!(num_drops.load(Ordering::SeqCst), 1); -} - -#[test] #[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")] fn test_into_inner_poison() { let m = new_poisoned_mutex(NonCopy(10)); @@ -129,15 +389,11 @@ fn test_into_inner_poison() { } #[test] -fn test_get_cloned() { - let m = Mutex::new(Cloneable(10)); - - assert_eq!(m.get_cloned().unwrap(), Cloneable(10)); -} - -#[test] #[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")] fn test_get_cloned_poison() { + #[derive(Clone, Eq, PartialEq, Debug)] + struct Cloneable(i32); + let m = new_poisoned_mutex(Cloneable(10)); match m.get_cloned() { @@ -147,13 +403,6 @@ fn test_get_cloned_poison() { } #[test] -fn test_get_mut() { - let mut m = Mutex::new(NonCopy(10)); - *m.get_mut().unwrap() = NonCopy(20); - assert_eq!(m.into_inner().unwrap(), NonCopy(20)); -} - -#[test] #[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")] fn test_get_mut_poison() { let mut m = new_poisoned_mutex(NonCopy(10)); @@ -165,23 +414,6 @@ fn test_get_mut_poison() { } #[test] -fn test_set() { - fn inner<T>(mut init: impl FnMut() -> T, mut value: impl FnMut() -> T) - where - T: Debug + Eq, - { - let m = Mutex::new(init()); - - assert_eq!(*m.lock().unwrap(), init()); - m.set(value()).unwrap(); - assert_eq!(*m.lock().unwrap(), value()); - } - - inner(|| NonCopy(10), || NonCopy(20)); - inner(|| NonCopyNeedsDrop(10), || NonCopyNeedsDrop(20)); -} - -#[test] #[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")] fn test_set_poison() { fn inner<T>(mut init: impl FnMut() -> T, mut value: impl FnMut() -> T) @@ -204,23 +436,6 @@ fn test_set_poison() { } #[test] -fn test_replace() { - fn inner<T>(mut init: impl FnMut() -> T, mut value: impl FnMut() -> T) - where - T: Debug + Eq, - { - let m = Mutex::new(init()); - - assert_eq!(*m.lock().unwrap(), init()); - assert_eq!(m.replace(value()).unwrap(), init()); - assert_eq!(*m.lock().unwrap(), value()); - } - - inner(|| NonCopy(10), || NonCopy(20)); - inner(|| NonCopyNeedsDrop(10), || NonCopyNeedsDrop(20)); -} - -#[test] #[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")] fn test_replace_poison() { fn inner<T>(mut init: impl FnMut() -> T, mut value: impl FnMut() -> T) @@ -243,31 +458,10 @@ fn test_replace_poison() { } #[test] -fn test_mutex_arc_condvar() { - let packet = Packet(Arc::new((Mutex::new(false), Condvar::new()))); - let packet2 = Packet(packet.0.clone()); - let (tx, rx) = channel(); - let _t = thread::spawn(move || { - // wait until parent gets in - rx.recv().unwrap(); - let &(ref lock, ref cvar) = &*packet2.0; - let mut lock = lock.lock().unwrap(); - *lock = true; - cvar.notify_one(); - }); - - let &(ref lock, ref cvar) = &*packet.0; - let mut lock = lock.lock().unwrap(); - tx.send(()).unwrap(); - assert!(!*lock); - while !*lock { - lock = cvar.wait(lock).unwrap(); - } -} - -#[test] #[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")] fn test_arc_condvar_poison() { + struct Packet<T>(Arc<(Mutex<T>, Condvar)>); + let packet = Packet(Arc::new((Mutex::new(1), Condvar::new()))); let packet2 = Packet(packet.0.clone()); let (tx, rx) = channel(); @@ -327,69 +521,6 @@ fn test_mutex_arc_poison_mapped() { } #[test] -fn test_mutex_arc_nested() { - // Tests nested mutexes and access - // to underlying data. - let arc = Arc::new(Mutex::new(1)); - let arc2 = Arc::new(Mutex::new(arc)); - let (tx, rx) = channel(); - let _t = thread::spawn(move || { - let lock = arc2.lock().unwrap(); - let lock2 = lock.lock().unwrap(); - assert_eq!(*lock2, 1); - tx.send(()).unwrap(); - }); - rx.recv().unwrap(); -} - -#[test] -#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")] -fn test_mutex_arc_access_in_unwind() { - let arc = Arc::new(Mutex::new(1)); - let arc2 = arc.clone(); - let _ = thread::spawn(move || -> () { - struct Unwinder { - i: Arc<Mutex<i32>>, - } - impl Drop for Unwinder { - fn drop(&mut self) { - *self.i.lock().unwrap() += 1; - } - } - let _u = Unwinder { i: arc2 }; - panic!(); - }) - .join(); - let lock = arc.lock().unwrap(); - assert_eq!(*lock, 2); -} - -#[test] -fn test_mutex_unsized() { - let mutex: &Mutex<[i32]> = &Mutex::new([1, 2, 3]); - { - let b = &mut *mutex.lock().unwrap(); - b[0] = 4; - b[2] = 5; - } - let comp: &[i32] = &[4, 2, 5]; - assert_eq!(&*mutex.lock().unwrap(), comp); -} - -#[test] -fn test_mapping_mapped_guard() { - let arr = [0; 4]; - let mut lock = Mutex::new(arr); - let guard = lock.lock().unwrap(); - let guard = MutexGuard::map(guard, |arr| &mut arr[..2]); - let mut guard = MappedMutexGuard::map(guard, |slice| &mut slice[1..]); - assert_eq!(guard.len(), 1); - guard[0] = 42; - drop(guard); - assert_eq!(*lock.get_mut().unwrap(), [0, 42, 0, 0]); -} - -#[test] #[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")] fn panic_while_mapping_unlocked_poison() { let lock = Mutex::new(()); 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