Yarn: Add BoundedPool<> and UnboundedPool<>

src/Yarn/Pool_test.cpp

+// Copyright 2019 The SwiftShader Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "Yarn_test.hpp"
+
+#include "Yarn/Pool.hpp"
+#include "Yarn/WaitGroup.hpp"
+
+TEST_P(WithBoundScheduler, UnboundedPool_ConstructDestruct)
+{
+    yarn::UnboundedPool<int> pool;
+}
+
+TEST_P(WithBoundScheduler, BoundedPool_ConstructDestruct)
+{
+    yarn::BoundedPool<int, 10> pool;
+}
+
+TEST_P(WithBoundScheduler, UnboundedPool_Borrow)
+{
+    yarn::UnboundedPool<int> pool;
+    for (int i = 0; i < 100; i++)
+    {
+        pool.borrow();
+    }
+}
+
+TEST_P(WithBoundScheduler, UnboundedPool_ConcurrentBorrow)
+{
+    yarn::UnboundedPool<int> pool;
+    constexpr int iterations = 10000;
+    yarn::WaitGroup wg(iterations);
+    for (int i = 0; i < iterations; i++) {
+        yarn::schedule([=] { pool.borrow(); wg.done(); });
+    }
+    wg.wait();
+}
+
+TEST_P(WithBoundScheduler, BoundedPool_Borrow)
+{
+    yarn::BoundedPool<int, 100> pool;
+    for (int i = 0; i < 100; i++)
+    {
+        pool.borrow();
+    }
+}
+
+TEST_P(WithBoundScheduler, BoundedPool_ConcurrentBorrow)
+{
+    yarn::BoundedPool<int, 10> pool;
+    constexpr int iterations = 10000;
+    yarn::WaitGroup wg(iterations);
+    for (int i = 0; i < iterations; i++) {
+        yarn::schedule([=]
+        {
+            pool.borrow();
+            wg.done();
+        });
+    }
+    wg.wait();
+}
+
+struct CtorDtorCounter
+{
+    CtorDtorCounter() { ctor_count++; }
+    ~CtorDtorCounter() { dtor_count++; }
+    static void reset() { ctor_count = 0; dtor_count = 0; }
+    static int ctor_count;
+    static int dtor_count;
+};
+
+int CtorDtorCounter::ctor_count = -1;
+int CtorDtorCounter::dtor_count = -1;
+
+TEST_P(WithBoundScheduler, UnboundedPool_PolicyReconstruct)
+{
+    CtorDtorCounter::reset();
+    yarn::UnboundedPool<CtorDtorCounter, yarn::PoolPolicy::Reconstruct> pool;
+    ASSERT_EQ(CtorDtorCounter::ctor_count, 0);
+    ASSERT_EQ(CtorDtorCounter::dtor_count, 0);
+    {
+        auto loan = pool.borrow();
+        ASSERT_EQ(CtorDtorCounter::ctor_count, 1);
+        ASSERT_EQ(CtorDtorCounter::dtor_count, 0);
+    }
+    ASSERT_EQ(CtorDtorCounter::ctor_count, 1);
+    ASSERT_EQ(CtorDtorCounter::dtor_count, 1);
+    {
+        auto loan = pool.borrow();
+        ASSERT_EQ(CtorDtorCounter::ctor_count, 2);
+        ASSERT_EQ(CtorDtorCounter::dtor_count, 1);
+    }
+    ASSERT_EQ(CtorDtorCounter::ctor_count, 2);
+    ASSERT_EQ(CtorDtorCounter::dtor_count, 2);
+}
+
+TEST_P(WithBoundScheduler, BoundedPool_PolicyReconstruct)
+{
+    CtorDtorCounter::reset();
+    yarn::BoundedPool<CtorDtorCounter, 10, yarn::PoolPolicy::Reconstruct> pool;
+    ASSERT_EQ(CtorDtorCounter::ctor_count, 0);
+    ASSERT_EQ(CtorDtorCounter::dtor_count, 0);
+    {
+        auto loan = pool.borrow();
+        ASSERT_EQ(CtorDtorCounter::ctor_count, 1);
+        ASSERT_EQ(CtorDtorCounter::dtor_count, 0);
+    }
+    ASSERT_EQ(CtorDtorCounter::ctor_count, 1);
+    ASSERT_EQ(CtorDtorCounter::dtor_count, 1);
+    {
+        auto loan = pool.borrow();
+        ASSERT_EQ(CtorDtorCounter::ctor_count, 2);
+        ASSERT_EQ(CtorDtorCounter::dtor_count, 1);
+    }
+    ASSERT_EQ(CtorDtorCounter::ctor_count, 2);
+    ASSERT_EQ(CtorDtorCounter::dtor_count, 2);
+}
+
+TEST_P(WithBoundScheduler, UnboundedPool_PolicyPreserve)
+{
+    CtorDtorCounter::reset();
+    {
+        yarn::UnboundedPool<CtorDtorCounter, yarn::PoolPolicy::Preserve> pool;
+        int ctor_count;
+        {
+            auto loan = pool.borrow();
+            ASSERT_NE(CtorDtorCounter::ctor_count, 0);
+            ASSERT_EQ(CtorDtorCounter::dtor_count, 0);
+            ctor_count = CtorDtorCounter::ctor_count;
+        }
+        ASSERT_EQ(CtorDtorCounter::ctor_count, ctor_count);
+        ASSERT_EQ(CtorDtorCounter::dtor_count, 0);
+        {
+            auto loan = pool.borrow();
+            ASSERT_EQ(CtorDtorCounter::ctor_count, ctor_count);
+            ASSERT_EQ(CtorDtorCounter::dtor_count, 0);
+        }
+        ASSERT_EQ(CtorDtorCounter::ctor_count, ctor_count);
+        ASSERT_EQ(CtorDtorCounter::dtor_count, 0);
+    }
+    ASSERT_EQ(CtorDtorCounter::ctor_count, CtorDtorCounter::dtor_count);
+}
+
+TEST_P(WithBoundScheduler, BoundedPool_PolicyPreserve)
+{
+    CtorDtorCounter::reset();
+    {
+        yarn::BoundedPool<CtorDtorCounter, 10, yarn::PoolPolicy::Preserve> pool;
+        int ctor_count;
+        {
+            auto loan = pool.borrow();
+            ASSERT_NE(CtorDtorCounter::ctor_count, 0);
+            ASSERT_EQ(CtorDtorCounter::dtor_count, 0);
+            ctor_count = CtorDtorCounter::ctor_count;
+        }
+        ASSERT_EQ(CtorDtorCounter::ctor_count, ctor_count);
+        ASSERT_EQ(CtorDtorCounter::dtor_count, 0);
+        {
+            auto loan = pool.borrow();
+            ASSERT_EQ(CtorDtorCounter::ctor_count, ctor_count);
+            ASSERT_EQ(CtorDtorCounter::dtor_count, 0);
+        }
+        ASSERT_EQ(CtorDtorCounter::ctor_count, ctor_count);
+        ASSERT_EQ(CtorDtorCounter::dtor_count, 0);
+    }
+    ASSERT_EQ(CtorDtorCounter::ctor_count, CtorDtorCounter::dtor_count);
+}