lldb/packages/Python/lldbsuite/test/make/pseudo_barrier.h

   1 #include <atomic>
   2
   3 // Note that although hogging the CPU while waiting for a variable to change
   4 // would be terrible in production code, it's great for testing since it avoids
   5 // a lot of messy context switching to get multiple threads synchronized.
   6
   7 typedef std::atomic<int> pseudo_barrier_t;
   8
   9 #define pseudo_barrier_wait(barrier)        \
  10     do                                      \
  11     {                                       \
  12         --(barrier);                        \
  13         while ((barrier).load() > 0)        \
  14             ;                               \
  15     } while (0)
  16
  17 #define pseudo_barrier_init(barrier, count) \
  18     do                                      \
  19     {                                       \
  20         (barrier) = (count);                \
  21     } while (0)