Make Benchmark a single header library (but not header-only) (#407)

include/benchmark/macros.h

-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-#ifndef BENCHMARK_MACROS_H_
-#define BENCHMARK_MACROS_H_
-
-#if __cplusplus >= 201103L
-#define BENCHMARK_HAS_CXX11
-#endif
-
-#ifndef BENCHMARK_HAS_CXX11
-#define BENCHMARK_DISALLOW_COPY_AND_ASSIGN(TypeName) \
-  TypeName(const TypeName&);                         \
-  TypeName& operator=(const TypeName&)
-#else
-#define BENCHMARK_DISALLOW_COPY_AND_ASSIGN(TypeName) \
-  TypeName(const TypeName&) = delete;                \
-  TypeName& operator=(const TypeName&) = delete
-#endif
-
-#if defined(__GNUC__)
-#define BENCHMARK_UNUSED __attribute__((unused))
-#define BENCHMARK_ALWAYS_INLINE __attribute__((always_inline))
-#define BENCHMARK_NOEXCEPT noexcept
-#define BENCHMARK_NOEXCEPT_OP(x) noexcept(x)
-#elif defined(_MSC_VER) && !defined(__clang__)
-#define BENCHMARK_UNUSED
-#define BENCHMARK_ALWAYS_INLINE __forceinline
-#if _MSC_VER >= 1900
-#define BENCHMARK_NOEXCEPT noexcept
-#define BENCHMARK_NOEXCEPT_OP(x) noexcept(x)
-#else
-#define BENCHMARK_NOEXCEPT
-#define BENCHMARK_NOEXCEPT_OP(x)
-#endif
-#define __func__ __FUNCTION__
-#else
-#define BENCHMARK_UNUSED
-#define BENCHMARK_ALWAYS_INLINE
-#define BENCHMARK_NOEXCEPT
-#define BENCHMARK_NOEXCEPT_OP(x)
-#endif
-
-#if defined(__GNUC__)
-#define BENCHMARK_BUILTIN_EXPECT(x, y) __builtin_expect(x, y)
-#define BENCHMARK_DEPRECATED_MSG(msg) __attribute__((deprecated(msg)))
-#else
-#define BENCHMARK_BUILTIN_EXPECT(x, y) x
-#define BENCHMARK_DEPRECATED_MSG(msg)
-#endif
-
-#if defined(__GNUC__) && !defined(__clang__)
-#define BENCHMARK_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
-#endif
-
-#endif  // BENCHMARK_MACROS_H_

include/benchmark/reporter.h

@@ -14,223 +14,14 @@
 #ifndef BENCHMARK_REPORTER_H_
 #define BENCHMARK_REPORTER_H_
 
-#include <cassert>
-#include <iosfwd>
-#include <string>
-#include <utility>
-#include <vector>
-#include <set>
+#ifdef __DEPRECATED
+# ifndef BENCHMARK_WARNING_MSG
+#   warning the reporter.h header has been deprecated and will be removed, please include benchmark.h instead
+# else
+    BENCHMARK_WARNING_MSG("the reporter.h header has been deprecated and will be removed, please include benchmark.h instead")
+# endif
+#endif
 
-#include "benchmark_api.h"  // For forward declaration of BenchmarkReporter
+#include "benchmark.h"  // For forward declaration of BenchmarkReporter
 
-namespace benchmark {
-
-// Interface for custom benchmark result printers.
-// By default, benchmark reports are printed to stdout. However an application
-// can control the destination of the reports by calling
-// RunSpecifiedBenchmarks and passing it a custom reporter object.
-// The reporter object must implement the following interface.
-class BenchmarkReporter {
- public:
-  struct Context {
-    int num_cpus;
-    double mhz_per_cpu;
-    bool cpu_scaling_enabled;
-
-    // The number of chars in the longest benchmark name.
-    size_t name_field_width;
-  };
-
-  struct Run {
-    Run()
-        : error_occurred(false),
-          iterations(1),
-          time_unit(kNanosecond),
-          real_accumulated_time(0),
-          cpu_accumulated_time(0),
-          bytes_per_second(0),
-          items_per_second(0),
-          max_heapbytes_used(0),
-          complexity(oNone),
-          complexity_lambda(),
-          complexity_n(0),
-          report_big_o(false),
-          report_rms(false),
-          counters() {}
-
-    std::string benchmark_name;
-    std::string report_label;  // Empty if not set by benchmark.
-    bool error_occurred;
-    std::string error_message;
-
-    int64_t iterations;
-    TimeUnit time_unit;
-    double real_accumulated_time;
-    double cpu_accumulated_time;
-
-    // Return a value representing the real time per iteration in the unit
-    // specified by 'time_unit'.
-    // NOTE: If 'iterations' is zero the returned value represents the
-    // accumulated time.
-    double GetAdjustedRealTime() const;
-
-    // Return a value representing the cpu time per iteration in the unit
-    // specified by 'time_unit'.
-    // NOTE: If 'iterations' is zero the returned value represents the
-    // accumulated time.
-    double GetAdjustedCPUTime() const;
-
-    // Zero if not set by benchmark.
-    double bytes_per_second;
-    double items_per_second;
-
-    // This is set to 0.0 if memory tracing is not enabled.
-    double max_heapbytes_used;
-
-    // Keep track of arguments to compute asymptotic complexity
-    BigO complexity;
-    BigOFunc* complexity_lambda;
-    int complexity_n;
-
-    // Inform print function whether the current run is a complexity report
-    bool report_big_o;
-    bool report_rms;
-
-    UserCounters counters;
-  };
-
-  // Construct a BenchmarkReporter with the output stream set to 'std::cout'
-  // and the error stream set to 'std::cerr'
-  BenchmarkReporter();
-
-  // Called once for every suite of benchmarks run.
-  // The parameter "context" contains information that the
-  // reporter may wish to use when generating its report, for example the
-  // platform under which the benchmarks are running. The benchmark run is
-  // never started if this function returns false, allowing the reporter
-  // to skip runs based on the context information.
-  virtual bool ReportContext(const Context& context) = 0;
-
-  // Called once for each group of benchmark runs, gives information about
-  // cpu-time and heap memory usage during the benchmark run. If the group
-  // of runs contained more than two entries then 'report' contains additional
-  // elements representing the mean and standard deviation of those runs.
-  // Additionally if this group of runs was the last in a family of benchmarks
-  // 'reports' contains additional entries representing the asymptotic
-  // complexity and RMS of that benchmark family.
-  virtual void ReportRuns(const std::vector<Run>& report) = 0;
-
-  // Called once and only once after ever group of benchmarks is run and
-  // reported.
-  virtual void Finalize() {}
-
-  // REQUIRES: The object referenced by 'out' is valid for the lifetime
-  // of the reporter.
-  void SetOutputStream(std::ostream* out) {
-    assert(out);
-    output_stream_ = out;
-  }
-
-  // REQUIRES: The object referenced by 'err' is valid for the lifetime
-  // of the reporter.
-  void SetErrorStream(std::ostream* err) {
-    assert(err);
-    error_stream_ = err;
-  }
-
-  std::ostream& GetOutputStream() const { return *output_stream_; }
-
-  std::ostream& GetErrorStream() const { return *error_stream_; }
-
-  virtual ~BenchmarkReporter();
-
-  // Write a human readable string to 'out' representing the specified
-  // 'context'.
-  // REQUIRES: 'out' is non-null.
-  static void PrintBasicContext(std::ostream* out, Context const& context);
-
- private:
-  std::ostream* output_stream_;
-  std::ostream* error_stream_;
-};
-
-// Simple reporter that outputs benchmark data to the console. This is the
-// default reporter used by RunSpecifiedBenchmarks().
-class ConsoleReporter : public BenchmarkReporter {
-public:
-  enum OutputOptions {
-    OO_None = 0,
-    OO_Color = 1,
-    OO_Tabular = 2,
-    OO_ColorTabular = OO_Color|OO_Tabular,
-    OO_Defaults = OO_ColorTabular
-  };
-  explicit ConsoleReporter(OutputOptions opts_ = OO_Defaults)
-      : output_options_(opts_), name_field_width_(0),
-        prev_counters_(), printed_header_(false) {}
-
-  virtual bool ReportContext(const Context& context);
-  virtual void ReportRuns(const std::vector<Run>& reports);
-
- protected:
-  virtual void PrintRunData(const Run& report);
-  virtual void PrintHeader(const Run& report);
-
-  OutputOptions output_options_;
-  size_t name_field_width_;
-  UserCounters prev_counters_;
-  bool printed_header_;
-};
-
-class JSONReporter : public BenchmarkReporter {
- public:
-  JSONReporter() : first_report_(true) {}
-  virtual bool ReportContext(const Context& context);
-  virtual void ReportRuns(const std::vector<Run>& reports);
-  virtual void Finalize();
-
- private:
-  void PrintRunData(const Run& report);
-
-  bool first_report_;
-};
-
-class CSVReporter : public BenchmarkReporter {
- public:
-  CSVReporter() : printed_header_(false) {}
-  virtual bool ReportContext(const Context& context);
-  virtual void ReportRuns(const std::vector<Run>& reports);
-
- private:
-  void PrintRunData(const Run& report);
-
-  bool printed_header_;
-  std::set< std::string > user_counter_names_;
-};
-
-inline const char* GetTimeUnitString(TimeUnit unit) {
-  switch (unit) {
-    case kMillisecond:
-      return "ms";
-    case kMicrosecond:
-      return "us";
-    case kNanosecond:
-    default:
-      return "ns";
-  }
-}
-
-inline double GetTimeUnitMultiplier(TimeUnit unit) {
-  switch (unit) {
-    case kMillisecond:
-      return 1e3;
-    case kMicrosecond:
-      return 1e6;
-    case kNanosecond:
-    default:
-      return 1e9;
-  }
-}
-
-}  // end namespace benchmark
 #endif  // BENCHMARK_REPORTER_H_

src/benchmark_api_internal.h

 #ifndef BENCHMARK_API_INTERNAL_H
 #define BENCHMARK_API_INTERNAL_H
 
-#include "benchmark/benchmark_api.h"
+#include "benchmark/benchmark.h"
 
 #include <cmath>
 #include <iosfwd>

src/complexity.cc

@@ -15,7 +15,7 @@
 // Source project : https://github.com/ismaelJimenez/cpp.leastsq
 // Adapted to be used with google benchmark
 
-#include "benchmark/benchmark_api.h"
+#include "benchmark/benchmark.h"
 
 #include <algorithm>
 #include <cmath>

src/complexity.h

@@ -21,8 +21,7 @@
 #include <string>
 #include <vector>
 
-#include "benchmark/benchmark_api.h"
-#include "benchmark/reporter.h"
+#include "benchmark/benchmark.h"
 
 namespace benchmark {
 

src/console_reporter.cc

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "benchmark/reporter.h"
+#include "benchmark/benchmark.h"
 #include "complexity.h"
 #include "counter.h"
 

src/counter.h

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "benchmark/benchmark_api.h"
+#include "benchmark/benchmark.h"
 
 namespace benchmark {
 

src/csv_reporter.cc

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "benchmark/reporter.h"
+#include "benchmark/benchmark.h"
 #include "complexity.h"
 
 #include <algorithm>

src/cycleclock.h

@@ -23,7 +23,7 @@
 
 #include <cstdint>
 
-#include "benchmark/macros.h"
+#include "benchmark/benchmark.h"
 #include "internal_macros.h"
 
 #if defined(BENCHMARK_OS_MACOSX)

src/internal_macros.h

 #ifndef BENCHMARK_INTERNAL_MACROS_H_
 #define BENCHMARK_INTERNAL_MACROS_H_
 
-#include "benchmark/macros.h"
+#include "benchmark/benchmark.h"
 
 #ifndef __has_feature
 #define __has_feature(x) 0

src/json_reporter.cc

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "benchmark/reporter.h"
+#include "benchmark/benchmark.h"
 #include "complexity.h"
 
 #include <algorithm>

src/log.h

@@ -4,7 +4,7 @@
 #include <iostream>
 #include <ostream>
 
-#include "benchmark/macros.h"
+#include "benchmark/benchmark.h"
 
 namespace benchmark {
 namespace internal {
@@ -70,4 +70,4 @@ inline LogType& GetLogInstanceForLevel(int level) {
   (::benchmark::internal::GetLogInstanceForLevel(x) << "-- LOG(" << x << "):" \
                                                                          " ")
 
-#endif
+#endif
\ No newline at end of file

src/reporter.cc

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "benchmark/reporter.h"
+#include "benchmark/benchmark.h"
 #include "timers.h"
 
 #include <cstdlib>

test/basic_test.cc

 
-#include "benchmark/benchmark_api.h"
+#include "benchmark/benchmark.h"
 
 #define BASIC_BENCHMARK_TEST(x) BENCHMARK(x)->Arg(8)->Arg(512)->Arg(8192)
 

test/diagnostics_test.cc

@@ -11,7 +11,7 @@
 #include <stdexcept>
 
 #include "../src/check.h"
-#include "benchmark/benchmark_api.h"
+#include "benchmark/benchmark.h"
 
 #if defined(__GNUC__) && !defined(__EXCEPTIONS)
 #define TEST_HAS_NO_EXCEPTIONS

test/options_test.cc

-#include "benchmark/benchmark_api.h"
+#include "benchmark/benchmark.h"
 #include <chrono>
 #include <thread>