src/util/profile.h

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