add original source

source/listing_5.10.cpp

@@ -0,0 +1,39 @@
+#include <string>
+#include <thread>
+#include <atomic>
+#include <assert.h>
+struct X
+{
+    int i;
+    std::string s;
+};
+
+std::atomic<X*> p;
+std::atomic<int> a;
+
+void create_x()
+{
+    X* x=new X;
+    x->i=42;
+    x->s="hello";
+    a.store(99,std::memory_order_relaxed);
+    p.store(x,std::memory_order_release);
+}
+
+void use_x()
+{
+    X* x;
+    while(!(x=p.load(std::memory_order_consume)))
+        std::this_thread::sleep_for(std::chrono::microseconds(1));
+    assert(x->i==42);
+    assert(x->s=="hello");
+    assert(a.load(std::memory_order_relaxed)==99);
+}
+int main()
+{
+    std::thread t1(create_x);
+    std::thread t2(use_x);
+    t1.join();
+    t2.join();
+}
+