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-rw-r--r--src/tests/common/fibers.cpp358
1 files changed, 358 insertions, 0 deletions
diff --git a/src/tests/common/fibers.cpp b/src/tests/common/fibers.cpp
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+++ b/src/tests/common/fibers.cpp
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+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <atomic>
+#include <cstdlib>
+#include <functional>
+#include <memory>
+#include <thread>
+#include <unordered_map>
+#include <vector>
+
+#include <catch2/catch.hpp>
+#include <math.h>
+#include "common/common_types.h"
+#include "common/fiber.h"
+#include "common/spin_lock.h"
+
+namespace Common {
+
+class TestControl1 {
+public:
+ TestControl1() = default;
+
+ void DoWork();
+
+ void ExecuteThread(u32 id);
+
+ std::unordered_map<std::thread::id, u32> ids;
+ std::vector<std::shared_ptr<Common::Fiber>> thread_fibers;
+ std::vector<std::shared_ptr<Common::Fiber>> work_fibers;
+ std::vector<u32> items;
+ std::vector<u32> results;
+};
+
+static void WorkControl1(void* control) {
+ auto* test_control = static_cast<TestControl1*>(control);
+ test_control->DoWork();
+}
+
+void TestControl1::DoWork() {
+ std::thread::id this_id = std::this_thread::get_id();
+ u32 id = ids[this_id];
+ u32 value = items[id];
+ for (u32 i = 0; i < id; i++) {
+ value++;
+ }
+ results[id] = value;
+ Fiber::YieldTo(work_fibers[id], thread_fibers[id]);
+}
+
+void TestControl1::ExecuteThread(u32 id) {
+ std::thread::id this_id = std::this_thread::get_id();
+ ids[this_id] = id;
+ auto thread_fiber = Fiber::ThreadToFiber();
+ thread_fibers[id] = thread_fiber;
+ work_fibers[id] = std::make_shared<Fiber>(std::function<void(void*)>{WorkControl1}, this);
+ items[id] = rand() % 256;
+ Fiber::YieldTo(thread_fibers[id], work_fibers[id]);
+ thread_fibers[id]->Exit();
+}
+
+static void ThreadStart1(u32 id, TestControl1& test_control) {
+ test_control.ExecuteThread(id);
+}
+
+/** This test checks for fiber setup configuration and validates that fibers are
+ * doing all the work required.
+ */
+TEST_CASE("Fibers::Setup", "[common]") {
+ constexpr std::size_t num_threads = 7;
+ TestControl1 test_control{};
+ test_control.thread_fibers.resize(num_threads);
+ test_control.work_fibers.resize(num_threads);
+ test_control.items.resize(num_threads, 0);
+ test_control.results.resize(num_threads, 0);
+ std::vector<std::thread> threads;
+ for (u32 i = 0; i < num_threads; i++) {
+ threads.emplace_back(ThreadStart1, i, std::ref(test_control));
+ }
+ for (u32 i = 0; i < num_threads; i++) {
+ threads[i].join();
+ }
+ for (u32 i = 0; i < num_threads; i++) {
+ REQUIRE(test_control.items[i] + i == test_control.results[i]);
+ }
+}
+
+class TestControl2 {
+public:
+ TestControl2() = default;
+
+ void DoWork1() {
+ trap2 = false;
+ while (trap.load())
+ ;
+ for (u32 i = 0; i < 12000; i++) {
+ value1 += i;
+ }
+ Fiber::YieldTo(fiber1, fiber3);
+ std::thread::id this_id = std::this_thread::get_id();
+ u32 id = ids[this_id];
+ assert1 = id == 1;
+ value2 += 5000;
+ Fiber::YieldTo(fiber1, thread_fibers[id]);
+ }
+
+ void DoWork2() {
+ while (trap2.load())
+ ;
+ value2 = 2000;
+ trap = false;
+ Fiber::YieldTo(fiber2, fiber1);
+ assert3 = false;
+ }
+
+ void DoWork3() {
+ std::thread::id this_id = std::this_thread::get_id();
+ u32 id = ids[this_id];
+ assert2 = id == 0;
+ value1 += 1000;
+ Fiber::YieldTo(fiber3, thread_fibers[id]);
+ }
+
+ void ExecuteThread(u32 id);
+
+ void CallFiber1() {
+ std::thread::id this_id = std::this_thread::get_id();
+ u32 id = ids[this_id];
+ Fiber::YieldTo(thread_fibers[id], fiber1);
+ }
+
+ void CallFiber2() {
+ std::thread::id this_id = std::this_thread::get_id();
+ u32 id = ids[this_id];
+ Fiber::YieldTo(thread_fibers[id], fiber2);
+ }
+
+ void Exit();
+
+ bool assert1{};
+ bool assert2{};
+ bool assert3{true};
+ u32 value1{};
+ u32 value2{};
+ std::atomic<bool> trap{true};
+ std::atomic<bool> trap2{true};
+ std::unordered_map<std::thread::id, u32> ids;
+ std::vector<std::shared_ptr<Common::Fiber>> thread_fibers;
+ std::shared_ptr<Common::Fiber> fiber1;
+ std::shared_ptr<Common::Fiber> fiber2;
+ std::shared_ptr<Common::Fiber> fiber3;
+};
+
+static void WorkControl2_1(void* control) {
+ auto* test_control = static_cast<TestControl2*>(control);
+ test_control->DoWork1();
+}
+
+static void WorkControl2_2(void* control) {
+ auto* test_control = static_cast<TestControl2*>(control);
+ test_control->DoWork2();
+}
+
+static void WorkControl2_3(void* control) {
+ auto* test_control = static_cast<TestControl2*>(control);
+ test_control->DoWork3();
+}
+
+void TestControl2::ExecuteThread(u32 id) {
+ std::thread::id this_id = std::this_thread::get_id();
+ ids[this_id] = id;
+ auto thread_fiber = Fiber::ThreadToFiber();
+ thread_fibers[id] = thread_fiber;
+}
+
+void TestControl2::Exit() {
+ std::thread::id this_id = std::this_thread::get_id();
+ u32 id = ids[this_id];
+ thread_fibers[id]->Exit();
+}
+
+static void ThreadStart2_1(u32 id, TestControl2& test_control) {
+ test_control.ExecuteThread(id);
+ test_control.CallFiber1();
+ test_control.Exit();
+}
+
+static void ThreadStart2_2(u32 id, TestControl2& test_control) {
+ test_control.ExecuteThread(id);
+ test_control.CallFiber2();
+ test_control.Exit();
+}
+
+/** This test checks for fiber thread exchange configuration and validates that fibers are
+ * that a fiber has been succesfully transfered from one thread to another and that the TLS
+ * region of the thread is kept while changing fibers.
+ */
+TEST_CASE("Fibers::InterExchange", "[common]") {
+ TestControl2 test_control{};
+ test_control.thread_fibers.resize(2);
+ test_control.fiber1 =
+ std::make_shared<Fiber>(std::function<void(void*)>{WorkControl2_1}, &test_control);
+ test_control.fiber2 =
+ std::make_shared<Fiber>(std::function<void(void*)>{WorkControl2_2}, &test_control);
+ test_control.fiber3 =
+ std::make_shared<Fiber>(std::function<void(void*)>{WorkControl2_3}, &test_control);
+ std::thread thread1(ThreadStart2_1, 0, std::ref(test_control));
+ std::thread thread2(ThreadStart2_2, 1, std::ref(test_control));
+ thread1.join();
+ thread2.join();
+ REQUIRE(test_control.assert1);
+ REQUIRE(test_control.assert2);
+ REQUIRE(test_control.assert3);
+ REQUIRE(test_control.value2 == 7000);
+ u32 cal_value = 0;
+ for (u32 i = 0; i < 12000; i++) {
+ cal_value += i;
+ }
+ cal_value += 1000;
+ REQUIRE(test_control.value1 == cal_value);
+}
+
+class TestControl3 {
+public:
+ TestControl3() = default;
+
+ void DoWork1() {
+ value1 += 1;
+ Fiber::YieldTo(fiber1, fiber2);
+ std::thread::id this_id = std::this_thread::get_id();
+ u32 id = ids[this_id];
+ value3 += 1;
+ Fiber::YieldTo(fiber1, thread_fibers[id]);
+ }
+
+ void DoWork2() {
+ value2 += 1;
+ std::thread::id this_id = std::this_thread::get_id();
+ u32 id = ids[this_id];
+ Fiber::YieldTo(fiber2, thread_fibers[id]);
+ }
+
+ void ExecuteThread(u32 id);
+
+ void CallFiber1() {
+ std::thread::id this_id = std::this_thread::get_id();
+ u32 id = ids[this_id];
+ Fiber::YieldTo(thread_fibers[id], fiber1);
+ }
+
+ void Exit();
+
+ u32 value1{};
+ u32 value2{};
+ u32 value3{};
+ std::unordered_map<std::thread::id, u32> ids;
+ std::vector<std::shared_ptr<Common::Fiber>> thread_fibers;
+ std::shared_ptr<Common::Fiber> fiber1;
+ std::shared_ptr<Common::Fiber> fiber2;
+};
+
+static void WorkControl3_1(void* control) {
+ auto* test_control = static_cast<TestControl3*>(control);
+ test_control->DoWork1();
+}
+
+static void WorkControl3_2(void* control) {
+ auto* test_control = static_cast<TestControl3*>(control);
+ test_control->DoWork2();
+}
+
+void TestControl3::ExecuteThread(u32 id) {
+ std::thread::id this_id = std::this_thread::get_id();
+ ids[this_id] = id;
+ auto thread_fiber = Fiber::ThreadToFiber();
+ thread_fibers[id] = thread_fiber;
+}
+
+void TestControl3::Exit() {
+ std::thread::id this_id = std::this_thread::get_id();
+ u32 id = ids[this_id];
+ thread_fibers[id]->Exit();
+}
+
+static void ThreadStart3(u32 id, TestControl3& test_control) {
+ test_control.ExecuteThread(id);
+ test_control.CallFiber1();
+ test_control.Exit();
+}
+
+/** This test checks for one two threads racing for starting the same fiber.
+ * It checks execution occured in an ordered manner and by no time there were
+ * two contexts at the same time.
+ */
+TEST_CASE("Fibers::StartRace", "[common]") {
+ TestControl3 test_control{};
+ test_control.thread_fibers.resize(2);
+ test_control.fiber1 =
+ std::make_shared<Fiber>(std::function<void(void*)>{WorkControl3_1}, &test_control);
+ test_control.fiber2 =
+ std::make_shared<Fiber>(std::function<void(void*)>{WorkControl3_2}, &test_control);
+ std::thread thread1(ThreadStart3, 0, std::ref(test_control));
+ std::thread thread2(ThreadStart3, 1, std::ref(test_control));
+ thread1.join();
+ thread2.join();
+ REQUIRE(test_control.value1 == 1);
+ REQUIRE(test_control.value2 == 1);
+ REQUIRE(test_control.value3 == 1);
+}
+
+class TestControl4;
+
+static void WorkControl4(void* control);
+
+class TestControl4 {
+public:
+ TestControl4() {
+ fiber1 = std::make_shared<Fiber>(std::function<void(void*)>{WorkControl4}, this);
+ goal_reached = false;
+ rewinded = false;
+ }
+
+ void Execute() {
+ thread_fiber = Fiber::ThreadToFiber();
+ Fiber::YieldTo(thread_fiber, fiber1);
+ thread_fiber->Exit();
+ }
+
+ void DoWork() {
+ fiber1->SetRewindPoint(std::function<void(void*)>{WorkControl4}, this);
+ if (rewinded) {
+ goal_reached = true;
+ Fiber::YieldTo(fiber1, thread_fiber);
+ }
+ rewinded = true;
+ fiber1->Rewind();
+ }
+
+ std::shared_ptr<Common::Fiber> fiber1;
+ std::shared_ptr<Common::Fiber> thread_fiber;
+ bool goal_reached;
+ bool rewinded;
+};
+
+static void WorkControl4(void* control) {
+ auto* test_control = static_cast<TestControl4*>(control);
+ test_control->DoWork();
+}
+
+TEST_CASE("Fibers::Rewind", "[common]") {
+ TestControl4 test_control{};
+ test_control.Execute();
+ REQUIRE(test_control.goal_reached);
+ REQUIRE(test_control.rewinded);
+}
+
+} // namespace Common
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