Fix timeout issue for bcradio worker thread
Accessed mIsTerminating inside the same lock as what is used in while
loop in worker thread class of broadcast radio HAL utils lib. This fixed
the race condition that mIsTerminating is accessed as true in threadLoop
while the destructor is setting mIsTerminating as false, which causes the
thread waits forever for lock after lock is released in the desctructor.
Bug: 314100017
Test: atest VtsHalBroadcastradioAidlTargetTest WorkerThreadTest
Change-Id: I885e1487ac39525fc2d1ee2134d24409264ca0fc
diff --git a/broadcastradio/common/tests/Android.bp b/broadcastradio/common/tests/Android.bp
index 0a6a3a2..1ea4e85 100644
--- a/broadcastradio/common/tests/Android.bp
+++ b/broadcastradio/common/tests/Android.bp
@@ -86,4 +86,7 @@
],
static_libs: ["android.hardware.broadcastradio@common-utils-lib"],
test_suites: ["general-tests"],
+ shared_libs: [
+ "libbase",
+ ],
}
diff --git a/broadcastradio/common/utils/WorkerThread.cpp b/broadcastradio/common/utils/WorkerThread.cpp
index 43fd04a..5c8e59c 100644
--- a/broadcastradio/common/utils/WorkerThread.cpp
+++ b/broadcastradio/common/utils/WorkerThread.cpp
@@ -69,8 +69,11 @@
}
void WorkerThread::threadLoop() {
- while (!mIsTerminating) {
+ while (true) {
unique_lock<mutex> lk(mMut);
+ if (mIsTerminating) {
+ return;
+ }
if (mTasks.empty()) {
mCond.wait(lk);
continue;
diff --git a/broadcastradio/common/utils/include/broadcastradio-utils/WorkerThread.h b/broadcastradio/common/utils/include/broadcastradio-utils/WorkerThread.h
index 457b57e..e381f5a 100644
--- a/broadcastradio/common/utils/include/broadcastradio-utils/WorkerThread.h
+++ b/broadcastradio/common/utils/include/broadcastradio-utils/WorkerThread.h
@@ -20,6 +20,8 @@
#include <queue>
#include <thread>
+#include <android-base/thread_annotations.h>
+
namespace android {
class WorkerThread {
@@ -40,11 +42,11 @@
};
friend bool operator<(const Task& lhs, const Task& rhs);
- std::atomic<bool> mIsTerminating;
std::mutex mMut;
- std::condition_variable mCond;
+ bool mIsTerminating GUARDED_BY(mMut);
+ std::condition_variable mCond GUARDED_BY(mMut);
std::thread mThread;
- std::priority_queue<Task> mTasks;
+ std::priority_queue<Task> mTasks GUARDED_BY(mMut);
void threadLoop();
};