Concurrent computing: Difference between revisions

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 {{works with|C++11}}
 The following example compiles with GCC 4.7.
 <code>g++ -std=c++11 -D_GLIBCXX_USE_NANOSLEEP -o concomp concomp.cpp</code>
 <lang cpp>#include <thread>
 #include <iostream>
@@ Line 245: / Line 243: @@
 #include <random>
 #include <chrono>
+int main() {
+    std::random_device rd;
-int main()
+    // mt19937 generator with a hardware random seed.
-{
-  std::random_device rd;
+    std::mt19937 eng(rd());
+    std::uniform_int_distribution<> dist(1,1000);
-  std::mt19937 eng(rd()); // mt19937 generator with a hardware random seed.
+    std::vector<std::thread> threads;
-  std::uniform_int_distribution<> dist(1,1000);
+    for (const auto& str: {"Enjoy\n", "Rosetta\n", "Code\n"}) {
-  std::vector<std::thread> threads;
+        // between 1 and 1000ms per our distribution
+        std::chrono::milliseconds duration(dist(eng));
-  for(const auto& str: {"Enjoy\n", "Rosetta\n", "Code\n"}) {
+        threads.emplace_back([str, duration]() {
-    // between 1 and 1000ms per our distribution
-    std::chrono::milliseconds duration(dist(eng));
+            std::this_thread::sleep_for(duration);
+            std::cout << str;
+        });
-    threads.emplace_back([str, duration](){
+    }
-      std::this_thread::sleep_for(duration);
+    for(auto& t: threads)
-      std::cout << str;
-    });
+        t.join();
-  }
-  for(auto& t: threads) t.join();
   return 0;
 }</lang>
-Output:
-<pre>Enjoy
-Code
-Rosetta</pre>
 {{libheader|Microsoft Parallel Patterns Library (PPL)}}
 <lang cpp>#include <iostream>
-#include <ppl.h> // MSVC++
+// MSVC++
+#include <ppl.h>
-void a(void) { std::cout << "Eat\n";   }
+void a(void) {
-void b(void) { std::cout << "At\n";    }
+    std::cout << "Eat\n";
+}
-void c(void) { std::cout << "Joe's\n"; }
+void b(void) {
+    std::cout << "At\n";
-int main()
+}
-{
+void c(void) {
+    std::cout << "Joe's\n";
+}
+int main() {
     // function pointers
     Concurrency::parallel_invoke(&a, &b, &c);
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     return 0;
 }</lang>
-Output:
-<pre>
-Joe's
-Eat
-At
-Enjoy
-Code
-Rosetta
-</pre>
 =={{header|Cind}}==