[Assorted-commits] SF.net SVN: assorted: [835] sandbox/trunk/src

[<yan...@us...>]

Revision: 835
          http://assorted.svn.sourceforge.net/assorted/?rev=835&view=rev
Author:   yangzhang
Date:     2008-06-01 17:16:49 -0700 (Sun, 01 Jun 2008)

Log Message:
-----------
added a bunch of sandbox stuff

Added Paths:
-----------
    sandbox/trunk/src/c/euclid.c
    sandbox/trunk/src/c/hello.c
    sandbox/trunk/src/cc/hello.cc
    sandbox/trunk/src/cc/privacy.cc
    sandbox/trunk/src/java/ClassLoadingThread.java

Added: sandbox/trunk/src/c/euclid.c
===================================================================
--- sandbox/trunk/src/c/euclid.c	                        (rev 0)
+++ sandbox/trunk/src/c/euclid.c	2008-06-02 00:16:49 UTC (rev 835)
@@ -0,0 +1,3 @@
+#include <stdio.h>
+int gcd(int a, int b) { return ( b != 0 ? gcd(b, a % b) : a ); }
+int main() { printf("%d %d\n", gcd(6,4), gcd(4,6)); return 0; }

Added: sandbox/trunk/src/c/hello.c
===================================================================
--- sandbox/trunk/src/c/hello.c	                        (rev 0)
+++ sandbox/trunk/src/c/hello.c	2008-06-02 00:16:49 UTC (rev 835)
@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int
+main()
+{
+  printf("hello, world!\n");
+  return 0;
+}

Added: sandbox/trunk/src/cc/hello.cc
===================================================================
--- sandbox/trunk/src/cc/hello.cc	                        (rev 0)
+++ sandbox/trunk/src/cc/hello.cc	2008-06-02 00:16:49 UTC (rev 835)
@@ -0,0 +1,15 @@
+// A simple hello world application.
+//
+// Try compiling this on a 64-bit machine for a 32-bit target with `g++ -m32
+// hello.cc`.
+
+#include <iostream>
+
+using namespace std;
+
+int
+main()
+{
+  cout << "hello, world!" << endl;
+  return 0;
+}

Added: sandbox/trunk/src/cc/privacy.cc
===================================================================
--- sandbox/trunk/src/cc/privacy.cc	                        (rev 0)
+++ sandbox/trunk/src/cc/privacy.cc	2008-06-02 00:16:49 UTC (rev 835)
@@ -0,0 +1,29 @@
+/**
+ * Is there any way at all to allow another class (such as testing) to peer
+ * into the protected state of an instance of c (that isn't `this`)?
+ *
+ * Probably not, since that would be asking for nothing short of 
+ */
+
+#include <stdlib.h>
+
+#define check(x) if (!(x)) { exit(1); }
+
+class c {
+  public: c() : x(0) {}
+  protected: int x;
+};
+
+class tester : public c {
+  public:
+    void test(c& c) {
+      if (c.x != 0) exit(1);
+    }
+};
+
+int main() {
+  c c;
+  tester t;
+  t.test(c);
+  return 0;
+}

Added: sandbox/trunk/src/java/ClassLoadingThread.java
===================================================================
--- sandbox/trunk/src/java/ClassLoadingThread.java	                        (rev 0)
+++ sandbox/trunk/src/java/ClassLoadingThread.java	2008-06-02 00:16:49 UTC (rev 835)
@@ -0,0 +1,27 @@
+// From http://www.drmaciver.com/2008/04/object-main-extends-application-considered-harmful/:
+//
+// Because the initialization of the Main$ class depends on the construction of
+// the Main object, Main$ will not be fully initialized until the constructor
+// has exited. The JVM semantics guarantee that class loading is single
+// threaded and that other threads cannot access the class until it has
+// finished loading. Hence the observed problem.
+//
+// However, I (Yang) couldn't repro this! XXX
+
+public class ClassLoadingThread {
+  static {
+    System.out.println("hello");
+    final ClassLoadingThread x = new ClassLoadingThread();
+    Runnable r = new Runnable() {
+      public void run() {
+        synchronized(x) { x.notify(); }
+      }
+    };
+    new Thread(r).start();
+    try { synchronized(x) { x.wait(); } }
+    catch (Exception ex) { throw new RuntimeException(ex); }
+  }
+  public static void main(String[] args) {
+    System.out.println("world");
+  }
+}


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