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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/logging.h"
#include "base/threading/simple_thread.h"
#include "base/threading/thread_local.h"
#include "base/synchronization/waitable_event.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace {
class ThreadLocalTesterBase : public base::DelegateSimpleThreadPool::Delegate {
public:
typedef base::ThreadLocalPointer<char> TLPType;
ThreadLocalTesterBase(TLPType* tlp, base::WaitableEvent* done)
: tlp_(tlp),
done_(done) {
}
~ThreadLocalTesterBase() override {}
protected:
TLPType* tlp_;
base::WaitableEvent* done_;
};
class SetThreadLocal : public ThreadLocalTesterBase {
public:
SetThreadLocal(TLPType* tlp, base::WaitableEvent* done)
: ThreadLocalTesterBase(tlp, done),
val_(NULL) {
}
~SetThreadLocal() override {}
void set_value(char* val) { val_ = val; }
void Run() override {
DCHECK(!done_->IsSignaled());
tlp_->Set(val_);
done_->Signal();
}
private:
char* val_;
};
class GetThreadLocal : public ThreadLocalTesterBase {
public:
GetThreadLocal(TLPType* tlp, base::WaitableEvent* done)
: ThreadLocalTesterBase(tlp, done),
ptr_(NULL) {
}
~GetThreadLocal() override {}
void set_ptr(char** ptr) { ptr_ = ptr; }
void Run() override {
DCHECK(!done_->IsSignaled());
*ptr_ = tlp_->Get();
done_->Signal();
}
private:
char** ptr_;
};
} // namespace
// In this test, we start 2 threads which will access a ThreadLocalPointer. We
// make sure the default is NULL, and the pointers are unique to the threads.
TEST(ThreadLocalTest, Pointer) {
base::DelegateSimpleThreadPool tp1("ThreadLocalTest tp1", 1);
base::DelegateSimpleThreadPool tp2("ThreadLocalTest tp1", 1);
tp1.Start();
tp2.Start();
base::ThreadLocalPointer<char> tlp;
static char* const kBogusPointer = reinterpret_cast<char*>(0x1234);
char* tls_val;
base::WaitableEvent done(WaitableEvent::ResetPolicy::MANUAL,
WaitableEvent::InitialState::NOT_SIGNALED);
GetThreadLocal getter(&tlp, &done);
getter.set_ptr(&tls_val);
// Check that both threads defaulted to NULL.
tls_val = kBogusPointer;
done.Reset();
tp1.AddWork(&getter);
done.Wait();
EXPECT_EQ(static_cast<char*>(NULL), tls_val);
tls_val = kBogusPointer;
done.Reset();
tp2.AddWork(&getter);
done.Wait();
EXPECT_EQ(static_cast<char*>(NULL), tls_val);
SetThreadLocal setter(&tlp, &done);
setter.set_value(kBogusPointer);
// Have thread 1 set their pointer value to kBogusPointer.
done.Reset();
tp1.AddWork(&setter);
done.Wait();
tls_val = NULL;
done.Reset();
tp1.AddWork(&getter);
done.Wait();
EXPECT_EQ(kBogusPointer, tls_val);
// Make sure thread 2 is still NULL
tls_val = kBogusPointer;
done.Reset();
tp2.AddWork(&getter);
done.Wait();
EXPECT_EQ(static_cast<char*>(NULL), tls_val);
// Set thread 2 to kBogusPointer + 1.
setter.set_value(kBogusPointer + 1);
done.Reset();
tp2.AddWork(&setter);
done.Wait();
tls_val = NULL;
done.Reset();
tp2.AddWork(&getter);
done.Wait();
EXPECT_EQ(kBogusPointer + 1, tls_val);
// Make sure thread 1 is still kBogusPointer.
tls_val = NULL;
done.Reset();
tp1.AddWork(&getter);
done.Wait();
EXPECT_EQ(kBogusPointer, tls_val);
tp1.JoinAll();
tp2.JoinAll();
}
TEST(ThreadLocalTest, Boolean) {
{
base::ThreadLocalBoolean tlb;
EXPECT_FALSE(tlb.Get());
tlb.Set(false);
EXPECT_FALSE(tlb.Get());
tlb.Set(true);
EXPECT_TRUE(tlb.Get());
}
// Our slot should have been freed, we're all reset.
{
base::ThreadLocalBoolean tlb;
EXPECT_FALSE(tlb.Get());
}
}
} // namespace base
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