Remove test_atomic.h header

Because <atomic> can now be used in C++03 there is no need for the test_atomic.h header.
This commit removes the header and converts all usages to use <atomic> instead.


git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@245468 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/thread/thread.condition/thread.condition.condvar/notify_one.pass.cpp

@@ -16,17 +16,17 @@
 // void notify_one();
 
 #include <condition_variable>
+#include <atomic>
 #include <mutex>
 #include <thread>
 #include <cassert>
 
-#include "test_atomic.h"
 
 std::condition_variable cv;
 std::mutex mut;
 
-AtomicInt test1(0);
-AtomicInt test2(0);
+std::atomic_int test1(0);
+std::atomic_int test2(0);
 
 void f1()
 {

test/std/thread/thread.condition/thread.condition.condvarany/wait_terminates.sh.cpp

@@ -56,14 +56,13 @@
 
 
 #include <condition_variable>
+#include <atomic>
 #include <thread>
 #include <chrono>
 #include <string>
 #include <cstdlib>
 #include <cassert>
 
-#include "test_atomic.h"
-
 void my_terminate() {
   std::_Exit(0); // Use _Exit to prevent cleanup from taking place.
 }
@@ -76,12 +75,14 @@ bool pred_function() {
 
 class ThrowingMutex
 {
-  AtomicBool locked;
+  std::atomic_bool locked;
   unsigned state = 0;
   ThrowingMutex(const ThrowingMutex&) = delete;
   ThrowingMutex& operator=(const ThrowingMutex&) = delete;
 public:
-  ThrowingMutex() = default;
+  ThrowingMutex() {
+    locked = false;
+  }
   ~ThrowingMutex() = default;
 
   void lock() {