text: #if defined(_WIN32)
  #include <windows.h>
  #include <psapi.h>
  
  #elif defined(__unix__) || defined(__unix) || defined(unix) || (defined(__APPLE__) && defined(__MACH__))
  #include <unistd.h>
  #include <sys/resource.h>
  
  #if defined(__APPLE__) && defined(__MACH__)
  #include <mach/mach.h>
  #include <mach/message.h>  // for mach_port_t
  #include <mach/task_info.h>
  
  #elif (defined(_AIX) || defined(__TOS__AIX__)) || (defined(__sun__) || defined(__sun) || defined(sun) && (defined(__SVR4) || defined(__svr4__)))
  #include <fcntl.h>
  #include <procfs.h>
  
  #elif defined(__linux__) || defined(__linux) || defined(linux) || defined(__gnu_linux__)
  #include <stdio.h>
  
  #endif
  
  #else
  #error "Cannot define getPeakRSS( ) or getCurrentRSS( ) for an unknown OS."
  #endif
  
  namespace mbgl {
  namespace test {
          
  
  /**
   * Returns the peak (maximum so far) resident set size (physical
   * memory use) measured in bytes, or zero if the value cannot be
   * determined on this OS.
   */
  size_t getPeakRSS();
  
  /**
   * Returns the current resident set size (physical memory use) measured
   * in bytes, or zero if the value cannot be determined on this OS.
   */
  size_t getCurrentRSS();
  
  } // namespace test
  } // namespace mbgl
  