1 //========- unittests/Support/ThreadPools.cpp - ThreadPools.h tests --========//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/Support/ThreadPool.h"
12 #include "llvm/ADT/STLExtras.h"
13 #include "llvm/ADT/SmallVector.h"
14 #include "llvm/ADT/Triple.h"
15 #include "llvm/Support/Host.h"
16 #include "llvm/Support/TargetSelect.h"
18 #include "gtest/gtest.h"
22 // Fixture for the unittests, allowing to *temporarily* disable the unittests
23 // on a particular platform
24 class ThreadPoolTest : public testing::Test {
26 SmallVector<Triple::ArchType, 4> UnsupportedArchs;
27 SmallVector<Triple::OSType, 4> UnsupportedOSs;
28 SmallVector<Triple::EnvironmentType, 1> UnsupportedEnvironments;
30 // This is intended for platform as a temporary "XFAIL"
31 bool isUnsupportedOSOrEnvironment() {
32 Triple Host(Triple::normalize(sys::getProcessTriple()));
34 if (std::find(UnsupportedEnvironments.begin(), UnsupportedEnvironments.end(),
35 Host.getEnvironment()) != UnsupportedEnvironments.end())
38 if (std::find(UnsupportedOSs.begin(), UnsupportedOSs.end(), Host.getOS())
39 != UnsupportedOSs.end())
42 if (std::find(UnsupportedArchs.begin(), UnsupportedArchs.end(), Host.getArch())
43 != UnsupportedArchs.end())
50 // Add unsupported configuration here, example:
51 // UnsupportedArchs.push_back(Triple::x86_64);
53 // See https://llvm.org/bugs/show_bug.cgi?id=25829
54 UnsupportedArchs.push_back(Triple::ppc64le);
55 UnsupportedArchs.push_back(Triple::ppc64);
58 /// Make sure this thread not progress faster than the main thread.
59 void waitForMainThread() {
60 while (!MainThreadReady) {
61 std::unique_lock<std::mutex> LockGuard(WaitMainThreadMutex);
62 WaitMainThread.wait(LockGuard, [&] { return MainThreadReady; });
66 /// Set the readiness of the main thread.
67 void setMainThreadReadyState(bool Ready) {
68 std::unique_lock<std::mutex> LockGuard(WaitMainThreadMutex);
69 MainThreadReady = Ready;
70 WaitMainThread.notify_all();
73 std::condition_variable WaitMainThread;
74 std::mutex WaitMainThreadMutex;
79 #define CHECK_UNSUPPORTED() \
81 if (isUnsupportedOSOrEnvironment()) \
85 TEST_F(ThreadPoolTest, AsyncBarrier) {
87 // test that async & barrier work together properly.
89 std::atomic_int checked_in{0};
91 setMainThreadReadyState(false);
93 for (size_t i = 0; i < 5; ++i) {
94 Pool.async([this, &checked_in, i] {
99 ASSERT_EQ(0, checked_in);
100 setMainThreadReadyState(true);
102 ASSERT_EQ(5, checked_in);
105 static void TestFunc(std::atomic_int &checked_in, int i) { checked_in += i; }
107 TEST_F(ThreadPoolTest, AsyncBarrierArgs) {
109 // Test that async works with a function requiring multiple parameters.
110 std::atomic_int checked_in{0};
113 for (size_t i = 0; i < 5; ++i) {
114 Pool.async(TestFunc, std::ref(checked_in), i);
117 ASSERT_EQ(10, checked_in);
120 TEST_F(ThreadPoolTest, Async) {
123 std::atomic_int i{0};
124 setMainThreadReadyState(false);
125 Pool.async([this, &i] {
129 Pool.async([&i] { ++i; });
130 ASSERT_NE(2, i.load());
131 setMainThreadReadyState(true);
133 ASSERT_EQ(2, i.load());
136 TEST_F(ThreadPoolTest, GetFuture) {
139 std::atomic_int i{0};
140 setMainThreadReadyState(false);
141 Pool.async([this, &i] {
145 // Force the future using get()
146 Pool.async([&i] { ++i; }).get();
147 ASSERT_NE(2, i.load());
148 setMainThreadReadyState(true);
150 ASSERT_EQ(2, i.load());
153 TEST_F(ThreadPoolTest, PoolDestruction) {
155 // Test that we are waiting on destruction
156 std::atomic_int checked_in{0};
158 setMainThreadReadyState(false);
160 for (size_t i = 0; i < 5; ++i) {
161 Pool.async([this, &checked_in, i] {
166 ASSERT_EQ(0, checked_in);
167 setMainThreadReadyState(true);
169 ASSERT_EQ(5, checked_in);