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// ---
// Author: Craig Silverstein

#ifndef TCMALLOC_TOOLS_TESTUTIL_H_
#define TCMALLOC_TOOLS_TESTUTIL_H_

// Run a function in a thread of its own and wait for it to finish.
// The function you pass in must have the signature
//    void MyFunction();
extern "C" void RunThread(void (*fn)());

// Run a function X times, in X threads, and wait for them all to finish.
// The function you pass in must have the signature
//    void MyFunction();
extern "C" void RunManyThreads(void (*fn)(), int count);

// The 'advanced' version: run a function X times, in X threads, and
// wait for them all to finish.
// The function you pass in must have the signature
//    void MyFunction(int idx);
// where idx is the index of the thread (which of the X threads this is).
extern "C" void RunManyThreadsWithId(void (*fn)(int), int count);

static void (* volatile noopt_helper)(void *) = [] (void* dummy) {};

// This function forces compiler to forget specific knowledge about
// value of 'val'. This is useful to avoid compiler optimizing out
// new/delete pairs for our unit tests.
template <typename T>
T noopt(T val) {
  noopt_helper(&val);
  return val;
}

#endif  // TCMALLOC_TOOLS_TESTUTIL_H_
