1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #if defined(OS_WIN)
6 #include <windows.h>
7 #include <process.h>
8 #endif
9
10 #include "base/simple_thread.h"
11 #include "base/thread_local_storage.h"
12 #include "testing/gtest/include/gtest/gtest.h"
13
14 #if defined(OS_WIN)
15 // Ignore warnings about ptr->int conversions that we use when
16 // storing ints into ThreadLocalStorage.
17 #pragma warning(disable : 4311 4312)
18 #endif
19
20 const int kInitialTlsValue = 0x5555;
21 static ThreadLocalStorage::Slot tls_slot(base::LINKER_INITIALIZED);
22
23
24 class ThreadLocalStorageRunner : public base::DelegateSimpleThread::Delegate {
25 public:
ThreadLocalStorageRunner(int * tls_value_ptr)26 explicit ThreadLocalStorageRunner(int* tls_value_ptr)
27 : tls_value_ptr_(tls_value_ptr) {}
28
~ThreadLocalStorageRunner()29 virtual ~ThreadLocalStorageRunner() {}
30
Run()31 virtual void Run() {
32 *tls_value_ptr_ = kInitialTlsValue;
33 tls_slot.Set(tls_value_ptr_);
34
35 int *ptr = static_cast<int*>(tls_slot.Get());
36 EXPECT_EQ(ptr, tls_value_ptr_);
37 EXPECT_EQ(*ptr, kInitialTlsValue);
38 *tls_value_ptr_ = 0;
39
40 ptr = static_cast<int*>(tls_slot.Get());
41 EXPECT_EQ(ptr, tls_value_ptr_);
42 EXPECT_EQ(*ptr, 0);
43 }
44
45 private:
46 int* tls_value_ptr_;
47 DISALLOW_COPY_AND_ASSIGN(ThreadLocalStorageRunner);
48 };
49
50
ThreadLocalStorageCleanup(void * value)51 void ThreadLocalStorageCleanup(void *value) {
52 int *ptr = reinterpret_cast<int*>(value);
53 if (ptr)
54 *ptr = kInitialTlsValue;
55 }
56
57
TEST(ThreadLocalStorageTest,Basics)58 TEST(ThreadLocalStorageTest, Basics) {
59 ThreadLocalStorage::Slot slot;
60 slot.Set(reinterpret_cast<void*>(123));
61 int value = reinterpret_cast<intptr_t>(slot.Get());
62 EXPECT_EQ(value, 123);
63 }
64
TEST(ThreadLocalStorageTest,TLSDestructors)65 TEST(ThreadLocalStorageTest, TLSDestructors) {
66 // Create a TLS index with a destructor. Create a set of
67 // threads that set the TLS, while the destructor cleans it up.
68 // After the threads finish, verify that the value is cleaned up.
69 const int kNumThreads = 5;
70 int values[kNumThreads];
71 ThreadLocalStorageRunner* thread_delegates[kNumThreads];
72 base::DelegateSimpleThread* threads[kNumThreads];
73
74 tls_slot.Initialize(ThreadLocalStorageCleanup);
75
76 // Spawn the threads.
77 for (int index = 0; index < kNumThreads; index++) {
78 values[index] = kInitialTlsValue;
79 thread_delegates[index] = new ThreadLocalStorageRunner(&values[index]);
80 threads[index] = new base::DelegateSimpleThread(thread_delegates[index],
81 "tls thread");
82 threads[index]->Start();
83 }
84
85 // Wait for the threads to finish.
86 for (int index = 0; index < kNumThreads; index++) {
87 threads[index]->Join();
88 delete threads[index];
89 delete thread_delegates[index];
90
91 // Verify that the destructor was called and that we reset.
92 EXPECT_EQ(values[index], kInitialTlsValue);
93 }
94 }
95