utils/benchmark/src/check.h

   1 #ifndef CHECK_H_
   2 #define CHECK_H_
   3
   4 #include <cstdlib>
   5 #include <ostream>
   6 #include <cmath>
   7
   8 #include "internal_macros.h"
   9 #include "log.h"
  10
  11 namespace benchmark {
  12 namespace internal {
  13
  14 typedef void(AbortHandlerT)();
  15
  16 inline AbortHandlerT*& GetAbortHandler() {
  17   static AbortHandlerT* handler = &std::abort;
  18   return handler;
  19 }
  20
  21 BENCHMARK_NORETURN inline void CallAbortHandler() {
  22   GetAbortHandler()();
  23   std::abort();  // fallback to enforce noreturn
  24 }
  25
  26 // CheckHandler is the class constructed by failing CHECK macros. CheckHandler
  27 // will log information about the failures and abort when it is destructed.
  28 class CheckHandler {
  29  public:
  30   CheckHandler(const char* check, const char* file, const char* func, int line)
  31       : log_(GetErrorLogInstance()) {
  32     log_ << file << ":" << line << ": " << func << ": Check `" << check
  33          << "' failed. ";
  34   }
  35
  36   LogType& GetLog() { return log_; }
  37
  38   BENCHMARK_NORETURN ~CheckHandler() BENCHMARK_NOEXCEPT_OP(false) {
  39     log_ << std::endl;
  40     CallAbortHandler();
  41   }
  42
  43   CheckHandler& operator=(const CheckHandler&) = delete;
  44   CheckHandler(const CheckHandler&) = delete;
  45   CheckHandler() = delete;
  46
  47  private:
  48   LogType& log_;
  49 };
  50
  51 }  // end namespace internal
  52 }  // end namespace benchmark
  53
  54 // The CHECK macro returns a std::ostream object that can have extra information
  55 // written to it.
  56 #ifndef NDEBUG
  57 #define CHECK(b)                                                             \
  58   (b ? ::benchmark::internal::GetNullLogInstance()                           \
  59      : ::benchmark::internal::CheckHandler(#b, __FILE__, __func__, __LINE__) \
  60            .GetLog())
  61 #else
  62 #define CHECK(b) ::benchmark::internal::GetNullLogInstance()
  63 #endif
  64
  65 #define CHECK_EQ(a, b) CHECK((a) == (b))
  66 #define CHECK_NE(a, b) CHECK((a) != (b))
  67 #define CHECK_GE(a, b) CHECK((a) >= (b))
  68 #define CHECK_LE(a, b) CHECK((a) <= (b))
  69 #define CHECK_GT(a, b) CHECK((a) > (b))
  70 #define CHECK_LT(a, b) CHECK((a) < (b))
  71
  72 #define CHECK_FLOAT_EQ(a, b, eps) CHECK(std::fabs((a) - (b)) <  (eps))
  73 #define CHECK_FLOAT_NE(a, b, eps) CHECK(std::fabs((a) - (b)) >= (eps))
  74 #define CHECK_FLOAT_GE(a, b, eps) CHECK((a) - (b) > -(eps))
  75 #define CHECK_FLOAT_LE(a, b, eps) CHECK((b) - (a) > -(eps))
  76 #define CHECK_FLOAT_GT(a, b, eps) CHECK((a) - (b) >  (eps))
  77 #define CHECK_FLOAT_LT(a, b, eps) CHECK((b) - (a) >  (eps))
  78
  79 #endif  // CHECK_H_