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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/testkit/testapp.h>
#include <vespa/vespalib/util/sync.h>
using namespace vespalib;
#define CHECK_LOCKED(m) { TryLock tl(m); EXPECT_TRUE(!tl.hasLock()); }
#define CHECK_UNLOCKED(m) { TryLock tl(m); EXPECT_TRUE(tl.hasLock()); }
class Test : public TestApp
{
private:
Lock _lock;
Monitor _monitor;
LockGuard lockLock() { return LockGuard(_lock); }
LockGuard lockMonitor() { return LockGuard(_monitor); }
MonitorGuard obtainMonitor() { return MonitorGuard(_monitor); }
public:
~Test();
void testCountDownLatch();
int Main() override;
};
Test::~Test() {}
void
Test::testCountDownLatch() {
{
CountDownLatch latch(5);
EXPECT_EQUAL(latch.getCount(), 5u);
latch.countDown();
EXPECT_EQUAL(latch.getCount(), 4u);
latch.countDown();
EXPECT_EQUAL(latch.getCount(), 3u);
latch.countDown();
EXPECT_EQUAL(latch.getCount(), 2u);
latch.countDown();
EXPECT_EQUAL(latch.getCount(), 1u);
latch.countDown();
EXPECT_EQUAL(latch.getCount(), 0u);
latch.countDown();
EXPECT_EQUAL(latch.getCount(), 0u);
latch.await(); // should not block
latch.await(); // should not block
}
{
Gate gate;
EXPECT_EQUAL(gate.getCount(), 1u);
gate.countDown();
EXPECT_EQUAL(gate.getCount(), 0u);
gate.countDown();
EXPECT_EQUAL(gate.getCount(), 0u);
gate.await(); // should not block
gate.await(); // should not block
}
{
Gate gate;
EXPECT_EQUAL(gate.getCount(), 1u);
EXPECT_EQUAL(gate.await(0), false);
EXPECT_EQUAL(gate.await(10), false);
gate.countDown();
EXPECT_EQUAL(gate.getCount(), 0u);
EXPECT_EQUAL(gate.await(0), true);
EXPECT_EQUAL(gate.await(10), true);
}
}
int
Test::Main()
{
TEST_INIT("sync_test");
{
Lock lock;
{
CHECK_UNLOCKED(lock);
LockGuard guard(lock);
CHECK_LOCKED(lock);
}
CHECK_UNLOCKED(lock);
{
LockGuard guard(lock);
CHECK_LOCKED(lock);
guard.unlock();
CHECK_UNLOCKED(lock);
}
}
// you can use a LockGuard to lock a Monitor
{
Monitor monitor;
{
CHECK_UNLOCKED(monitor);
LockGuard guard(monitor);
CHECK_LOCKED(monitor);
}
CHECK_UNLOCKED(monitor);
{
LockGuard guard(monitor);
CHECK_LOCKED(monitor);
guard.unlock();
CHECK_UNLOCKED(monitor);
}
}
{
Monitor monitor;
{
CHECK_UNLOCKED(monitor);
MonitorGuard guard(monitor);
guard.signal();
guard.broadcast();
guard.wait(10);
CHECK_LOCKED(monitor);
}
CHECK_UNLOCKED(monitor);
{
MonitorGuard guard(monitor);
CHECK_LOCKED(monitor);
guard.unlock();
CHECK_UNLOCKED(monitor);
}
}
// copy/assign is nop, but legal
{
Lock a;
Lock b(a);
b = a;
}
{
Monitor a;
Monitor b(a);
b = a;
}
// you can lock const objects
{
const Lock lock;
CHECK_UNLOCKED(lock);
LockGuard guard(lock);
CHECK_LOCKED(lock);
}
{
const Monitor lock;
CHECK_UNLOCKED(lock);
LockGuard guard(lock);
CHECK_LOCKED(lock);
}
{
const Monitor monitor;
CHECK_UNLOCKED(monitor);
MonitorGuard guard(monitor);
CHECK_LOCKED(monitor);
}
// TryLock hands the lock over to a LockGuard/MonitorGuard
{
Lock lock;
CHECK_UNLOCKED(lock);
TryLock a(lock);
CHECK_LOCKED(lock);
if (a.hasLock()) {
LockGuard guard(a);
CHECK_LOCKED(lock);
}
CHECK_UNLOCKED(lock);
}
{
Monitor mon;
CHECK_UNLOCKED(mon);
TryLock a(mon);
CHECK_LOCKED(mon);
if (a.hasLock()) {
LockGuard guard(a);
CHECK_LOCKED(mon);
}
CHECK_UNLOCKED(mon);
}
{
Monitor mon;
CHECK_UNLOCKED(mon);
TryLock a(mon);
CHECK_LOCKED(mon);
if (a.hasLock()) {
MonitorGuard guard(a);
CHECK_LOCKED(mon);
}
CHECK_UNLOCKED(mon);
}
{
Lock lock;
CHECK_UNLOCKED(lock);
TryLock a(lock);
CHECK_LOCKED(lock);
TryLock b(lock);
CHECK_LOCKED(lock);
EXPECT_TRUE(a.hasLock());
EXPECT_TRUE(!b.hasLock());
{
CHECK_LOCKED(lock);
EXPECT_TRUE(a.hasLock());
LockGuard guard(a);
EXPECT_TRUE(!a.hasLock());
CHECK_LOCKED(lock);
}
CHECK_UNLOCKED(lock);
}
// TryLock will unlock when exiting scope if lock was not passed on
{
Lock lock;
Monitor mon;
CHECK_UNLOCKED(lock);
CHECK_UNLOCKED(mon);
{
TryLock a(lock);
EXPECT_TRUE(a.hasLock());
TryLock b(mon);
EXPECT_TRUE(b.hasLock());
CHECK_LOCKED(lock);
CHECK_LOCKED(mon);
}
CHECK_UNLOCKED(lock);
CHECK_UNLOCKED(mon);
}
// TryLock explicitt unlock of lock
{
Lock lock;
TryLock tl(lock);
EXPECT_TRUE(tl.hasLock());
tl.unlock();
EXPECT_FALSE(tl.hasLock());
tl.unlock();
EXPECT_FALSE(tl.hasLock());
}
// TryLock explicitt unlock of monitor
{
Monitor lock;
TryLock tl(lock);
EXPECT_TRUE(tl.hasLock());
tl.unlock();
EXPECT_FALSE(tl.hasLock());
tl.unlock();
EXPECT_FALSE(tl.hasLock());
}
// LockGuard/MonitorGuard have destructive copy
{
Lock lock;
CHECK_UNLOCKED(lock);
LockGuard a(lock);
CHECK_LOCKED(lock);
{
CHECK_LOCKED(lock);
LockGuard b(a);
CHECK_LOCKED(lock);
}
CHECK_UNLOCKED(lock);
}
{
Monitor mon;
CHECK_UNLOCKED(mon);
MonitorGuard a(mon);
CHECK_LOCKED(mon);
{
CHECK_LOCKED(mon);
MonitorGuard b(a);
CHECK_LOCKED(mon);
}
CHECK_UNLOCKED(mon);
}
// Destructive copy also works for return value handover
{
CHECK_UNLOCKED(_lock);
CHECK_UNLOCKED(_monitor);
{
CHECK_UNLOCKED(_lock);
CHECK_UNLOCKED(_monitor);
LockGuard a(lockLock());
CHECK_LOCKED(_lock);
CHECK_UNLOCKED(_monitor);
LockGuard b = lockMonitor(); // copy, not assign
CHECK_LOCKED(_lock);
CHECK_LOCKED(_monitor);
}
CHECK_UNLOCKED(_lock);
CHECK_UNLOCKED(_monitor);
}
{
CHECK_UNLOCKED(_monitor);
{
CHECK_UNLOCKED(_monitor);
MonitorGuard guard(obtainMonitor());
CHECK_LOCKED(_monitor);
}
CHECK_UNLOCKED(_monitor);
}
// Test that guards can be matched to locks/monitors
{
Lock lock1;
Lock lock2;
LockGuard lockGuard1(lock1);
LockGuard lockGuard2(lock2);
EXPECT_TRUE(lockGuard1.locks(lock1));
EXPECT_FALSE(lockGuard1.locks(lock2));
EXPECT_TRUE(lockGuard2.locks(lock2));
EXPECT_FALSE(lockGuard2.locks(lock1));
lockGuard1.unlock();
EXPECT_FALSE(lockGuard1.locks(lock1));
}
{
Monitor lock1;
Monitor lock2;
MonitorGuard lockGuard1(lock1);
MonitorGuard lockGuard2(lock2);
EXPECT_TRUE(lockGuard1.monitors(lock1));
EXPECT_FALSE(lockGuard1.monitors(lock2));
EXPECT_TRUE(lockGuard2.monitors(lock2));
EXPECT_FALSE(lockGuard2.monitors(lock1));
lockGuard1.unlock();
EXPECT_FALSE(lockGuard1.monitors(lock1));
}
testCountDownLatch();
TEST_DONE();
}
TEST_APPHOOK(Test)
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