1/* Timing variables for measuring compiler performance. 2 Copyright (C) 2000, 2003, 2004, 2005 Free Software Foundation, Inc. 3 Contributed by Alex Samuel <samuel@codesourcery.com> 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it 8 under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 2, or (at your option) 10 any later version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 15 License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING. If not, write to the Free 19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 20 02110-1301, USA. */ 21 22#ifndef GCC_TIMEVAR_H 23#define GCC_TIMEVAR_H 24 25/* Timing variables are used to measure elapsed time in various 26 portions of the compiler. Each measures elapsed user, system, and 27 wall-clock time, as appropriate to and supported by the host 28 system. 29 30 Timing variables are defined using the DEFTIMEVAR macro in 31 timevar.def. Each has an enumeral identifier, used when referring 32 to the timing variable in code, and a character string name. 33 34 Timing variables can be used in two ways: 35 36 - On the timing stack, using timevar_push and timevar_pop. 37 Timing variables may be pushed onto the stack; elapsed time is 38 attributed to the topmost timing variable on the stack. When 39 another variable is pushed on, the previous topmost variable is 40 `paused' until the pushed variable is popped back off. 41 42 - As a standalone timer, using timevar_start and timevar_stop. 43 All time elapsed between the two calls is attributed to the 44 variable. 45*/ 46 47/* This structure stores the various varieties of time that can be 48 measured. Times are stored in seconds. The time may be an 49 absolute time or a time difference; in the former case, the time 50 base is undefined, except that the difference between two times 51 produces a valid time difference. */ 52 53struct timevar_time_def 54{ 55 /* User time in this process. */ 56 double user; 57 58 /* System time (if applicable for this host platform) in this 59 process. */ 60 double sys; 61 62 /* Wall clock time. */ 63 double wall; 64 65 /* Garbage collector memory. */ 66 unsigned ggc_mem; 67}; 68 69/* An enumeration of timing variable identifiers. Constructed from 70 the contents of timevar.def. */ 71 72#define DEFTIMEVAR(identifier__, name__) \ 73 identifier__, 74typedef enum 75{ 76#include "timevar.def" 77 TIMEVAR_LAST 78} 79timevar_id_t; 80#undef DEFTIMEVAR 81 82/* Execute the sequence: timevar_pop (TV), return (E); */ 83#define POP_TIMEVAR_AND_RETURN(TV, E) do { timevar_pop (TV); return (E); }while(0) 84#define timevar_pop(TV) do { if (timevar_enable) timevar_pop_1 (TV); }while(0) 85#define timevar_push(TV) do { if (timevar_enable) timevar_push_1 (TV); }while(0) 86 87extern void timevar_init (void); 88extern void timevar_push_1 (timevar_id_t); 89extern void timevar_pop_1 (timevar_id_t); 90extern void timevar_start (timevar_id_t); 91extern void timevar_stop (timevar_id_t); 92extern void timevar_print (FILE *); 93 94/* Provided for backward compatibility. */ 95extern void print_time (const char *, long); 96 97extern bool timevar_enable; 98 99extern size_t timevar_ggc_mem_total; 100 101#endif /* ! GCC_TIMEVAR_H */ 102