src/util/profile.h

   1 /** Process' CPU time utilities
   2  * @file*/
   3
   4 #ifndef EL__UTIL_PROFILE_H
   5 #define EL__UTIL_PROFILE_H
   6
   7 #ifdef HAVE_CONFIG_H
   8 #include "config.h"
   9 #endif
  10
  11 #ifdef CONFIG_DEBUG
  12 #include <time.h>
  13
  14 /** @c CLK_DECL(n) declares an array of @a n clock_t to be used by
  15  * CLK_* macros.  Must occur before any CLK_* macros call. */
  16 #define CLK_DECL(n) clock_t clk_start[n], clk_end[n], clk_diff[n]; int clk_start_line[n], clk_stop_line[n]
  17
  18 /** @c CLK_START(n) starts clock @a n.
  19  * Must occur after CLK_DECL() and before CLK_STOP(). */
  20 #define CLK_START(n) do { clk_start_line[n] = __LINE__; clk_start[n] = clock(); } while (0)
  21
  22 /* @c CLK_STOP(n) stops clock @a n.
  23  * Must occur after CLK_START() and before CLK_DUMP(). */
  24 #define CLK_STOP(n) do { clk_end[n] = clock(); clk_diff[n] = clk_end[n] - clk_start[n]; clk_stop_line[n] = __LINE__; } while (0)
  25
  26 /* @c CLK_DUMP(n) echoes cpu time spent between CLK_START(@a n) and
  27  * CLK_STOP(@a n).  Must occur after CLK_START() and CLK_STOP(). */
  28 #define CLK_DUMP(n) do { \
  29         fprintf(stderr, "%s:%d->%d CLK[%d]= %.16f sec.\n", \
  30                 __FILE__, clk_start_line[n], clk_stop_line[n], \
  31                 n, (double) clk_diff[n] / (double) CLOCKS_PER_SEC);\
  32 } while (0)
  33
  34 /** Shortcuts for function profiling.
  35  * CLK_STA() must be at end of local declarations.
  36  * CLK_STO() must be just before end of function. */
  37 #define CLK_STA() CLK_DECL(1); CLK_START(0)
  38 #define CLK_STO() CLK_STOP(0); CLK_DUMP(0)
  39
  40 #else
  41 /* Dummy macros. */
  42 #define CLK_DECL(n)
  43 #define CLK_START(n) do {} while (0)
  44 #define CLK_STOP(n)  do {} while (0)
  45 #define CLK_DUMP(n)  do {} while (0)
  46 #define CLK_STA()
  47 #define CLK_STO()
  48 #endif
  49
  50 #endif