adb: enable -Wthread-safety on linux/darwin.

Delete the sysdeps/mutex tests that -Wthread-safety complains about.
We're using the standard library's std::mutex on all platforms now,
anyway.

Test: mma
Change-Id: I3bf958c72604b29dfb1d9c898d3c9aa34aed2685

adb/Android.mk

@@ -17,11 +17,15 @@ ADB_COMMON_CFLAGS := \
     -Wvla \
     -DADB_REVISION='"$(adb_version)"' \
 
-ADB_COMMON_linux_CFLAGS := \
+ADB_COMMON_posix_CFLAGS := \
     -Wexit-time-destructors \
+    -Wthread-safety
+
+ADB_COMMON_linux_CFLAGS := \
+    $(ADB_COMMON_posix_CFLAGS) \
 
 ADB_COMMON_darwin_CFLAGS := \
-    -Wexit-time-destructors \
+    $(ADB_COMMON_posix_CFLAGS) \
 
 # Define windows.h and tchar.h Unicode preprocessor symbols so that
 # CreateFile(), _tfopen(), etc. map to versions that take wchar_t*, breaking the

adb/sysdeps_test.cpp

@@ -201,55 +201,6 @@ TEST_F(sysdeps_poll, fd_count) {
     }
 }
 
-TEST(sysdeps_mutex, mutex_smoke) {
-    static std::atomic<bool> finished(false);
-    static std::mutex &m = *new std::mutex();
-    m.lock();
-    ASSERT_FALSE(m.try_lock());
-    std::thread thread([]() {
-        ASSERT_FALSE(m.try_lock());
-        m.lock();
-        finished.store(true);
-        std::this_thread::sleep_for(200ms);
-        m.unlock();
-    });
-
-    ASSERT_FALSE(finished.load());
-    std::this_thread::sleep_for(100ms);
-    ASSERT_FALSE(finished.load());
-    m.unlock();
-    std::this_thread::sleep_for(100ms);
-    m.lock();
-    ASSERT_TRUE(finished.load());
-    m.unlock();
-
-    thread.join();
-}
-
-TEST(sysdeps_mutex, recursive_mutex_smoke) {
-    static std::recursive_mutex &m = *new std::recursive_mutex();
-
-    m.lock();
-    ASSERT_TRUE(m.try_lock());
-    m.unlock();
-
-    std::thread thread([]() {
-        ASSERT_FALSE(m.try_lock());
-        m.lock();
-        std::this_thread::sleep_for(500ms);
-        m.unlock();
-    });
-
-    std::this_thread::sleep_for(100ms);
-    m.unlock();
-    std::this_thread::sleep_for(100ms);
-    ASSERT_FALSE(m.try_lock());
-    m.lock();
-    m.unlock();
-
-    thread.join();
-}
-
 TEST(sysdeps_condition_variable, smoke) {
     static std::mutex &m = *new std::mutex;
     static std::condition_variable &cond = *new std::condition_variable;