/phase2fixed/SBB_util.cc

https://github.com/caymanson/financial_software_projects · C++ · 63 lines · 48 code · 14 blank · 1 comment · 0 complexity · ea54a5442b49156d50c071b9a0a9c087 MD5 · raw file 

    

  1. #ifndef SBB_UTIL_H
    2. 

  2. #define SBB_UTIL_H
    3. 

  3. 

  4. #include "SBB_util.h"
    5. 

  5. #include "string.h"
    6. 

  6. 

  7. static long Ticks_per_second = sysconf(_SC_CLK_TCK); 
    8. 

  8. 

  9. SBB_util::SBB_util()
    10. 

  10. {
    11. 

  11. 	_start_time=0;
    12. 

  12. 	_end_time=0;
    13. 

  13. 	memset(&_start_cpu,0,sizeof(struct tms));
    14. 

  14. 	memset(&_end_cpu,0,sizeof(struct tms));
    15. 

  15. 	printf("system constant: clock ticks per second: %d\n", Ticks_per_second);
    16. 

  16. }
    17. 

  17. 

  18. 

  19. void
    20. 

  20. SBB_util::start_clock()
    21. 

  21. {
    22. 

  22. 	_start_time = times(&_start_cpu);
    23. 

  23. }
    24. 

  24. 

  25. void
    26. 

  26. SBB_util::end_clock()
    27. 

  27. {
    28. 

  28. 

  29. #ifdef OLD
    30. 

  30. 	_end_time = times(&_end_cpu);
    31. 

  31. 

  32. 	intmax_t real_time_diff = _end_time - _start_time;
    33. 

  33. 	intmax_t user_time_diff = _end_cpu.tms_utime - _start_cpu.tms_utime;
    34. 

  34. 	intmax_t system_time_diff = _end_cpu.tms_stime - _start_cpu.tms_stime;
    35. 

  35. 	double ticks_per_second_casted = Ticks_per_second; // so I can divide
    36. 

  36. #endif
    37. 

  37. 

  38. 	double real_time, user_time, system_time;
    39. 

  39. 	end_clock(real_time,user_time,system_time);
    40. 

  40. 

  41. 	printf("\nREAL seconds: %3.3f - USER space seconds: %3.3f SYSTEM space seconds: %3.3f\n\n",
    42. 

  42. 		real_time,
    43. 

  43. 		user_time,
    44. 

  44. 		system_time);
    45. 

  45. }
    46. 

  46. 

  47. void 
    48. 

  48. SBB_util::end_clock(double& real_time, double& user_time, double& system_time)
    49. 

  49. {
    50. 

  50. 	_end_time = times(&_end_cpu);
    51. 

  51. 

  52. 	intmax_t real_time_diff = _end_time - _start_time;
    53. 

  53. 	intmax_t user_time_diff = _end_cpu.tms_utime - _start_cpu.tms_utime;
    54. 

  54. 	intmax_t system_time_diff = _end_cpu.tms_stime - _start_cpu.tms_stime;
    55. 

  55. 	double ticks_per_second_casted = Ticks_per_second; // so I can divide
    56. 

  56. 

  57. 	//printf("\nREAL seconds: %3.3f (USER space seconds: %3.3f SYSTEM space seconds: %3.3f)\n\n",
    58. 

  58. 	real_time = real_time_diff/ticks_per_second_casted;
    59. 

  59. 	user_time = user_time_diff/ticks_per_second_casted;
    60. 

  60. 	system_time = system_time_diff/ticks_per_second_casted;
    61. 

  61. }
    62. 

  62. 

  63. #endif
    64.