text: /* Copyright 2013-2020 Bas van den Berg
   *
   * 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 UTILS_UTILS_H
  #define UTILS_UTILS_H
  
  #include <stdint.h>
  #include <sys/types.h>
  #include <string>
  
  namespace C2 {
  
  class Utils {
  public:
      static uint64_t getCurrentTime();
      static uint64_t bitmask(unsigned width) {
          // create mask, 4 -> 0xF,  5-> 0x1F, etc
          uint64_t mask = 0;
          for (unsigned i=0; i<width; i++) {
              mask |= (1lu<<i);
          }
          return mask;
      }
      static bool endsWith(const char* text, const char* tail);
      // return pointer to filename after last '/'
      static const char* getFileName(const std::string& s);
  
      static unsigned online_cpus();
  };
  
  }
  
  #endif
  
  