add falsesharing benchmarks from berger

1 files changed, 97 insertions, 0 deletions

diff --git a/benchmarks/fred.h b/benchmarks/fred.h
new file mode 100644
index 0000000..b0198a7
--- /dev/null
+++ b/benchmarks/fred.h
@@ -0,0 +1,97 @@
+// -*- C++ -*-
+
+#ifndef HL_FRED_H
+#define HL_FRED_H
+
+/// A thread-wrapper of childlike simplicity :).
+
+#if defined(_WIN32)
+
+  #include <windows.h>
+  #include <process.h>
+
+#elif defined(__SVR4)
+
+  #include <thread.h>
+  #include <pthread.h>
+  #include <unistd.h>
+
+#else
+
+  #include <pthread.h>
+  #include <unistd.h>
+
+#endif
+
+typedef void * (*ThreadFunctionType) (void *);
+
+namespace HL {
+
+class Fred {
+public:
+
+  Fred() {
+#if !defined(_WIN32)
+    pthread_attr_init (&attr);
+    pthread_attr_setscope (&attr, PTHREAD_SCOPE_SYSTEM);
+#endif
+  }
+
+  ~Fred() {
+#if !defined(_WIN32)
+    pthread_attr_destroy (&attr);
+#endif
+  }
+
+  void create (ThreadFunctionType function, void * arg) {
+#if defined(_WIN32)
+    t = CreateThread (0, 0, (LPTHREAD_START_ROUTINE) *function, (LPVOID) arg, 0, 0);
+#else
+    pthread_create (&t, &attr, function, arg);
+#endif
+  }
+
+  void join (void) {
+#if defined(_WIN32)
+    WaitForSingleObject (t, INFINITE);
+#else
+    pthread_join (t, NULL);
+#endif
+  }
+
+  static void yield (void) {
+#if defined(_WIN32)
+    Sleep (0);
+#elif defined(__SVR4)
+    thr_yield();
+#else
+    sched_yield();
+#endif
+  }
+
+
+  static void setConcurrency (int n) {
+#if defined(_WIN32)
+#elif defined(__SVR4)
+    thr_setconcurrency (n);
+#else
+    pthread_setconcurrency (n);
+#endif
+  }
+
+
+private:
+#if defined(_WIN32)
+  typedef HANDLE FredType;
+#else
+  typedef pthread_t FredType;
+  pthread_attr_t attr;
+#endif
+
+  FredType t;
+};
+
+}
+
+
+#endif