projects / bison.git / blame
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|---|---|---|
| 1509d42f AD |
1 | /* Timing variables for measuring compiler performance. |
| 2 | Copyright (C) 2000 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, 59 Temple Place - Suite 330, Boston, MA | |
| 20 | 02111-1307, 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 | ||
| 53 | struct timevar_time_def | |
| 54 | { | |
| 55 | /* User time in this process. */ | |
| 56 | float user; | |
| 57 | ||
| 58 | /* System time (if applicable for this host platform) in this | |
| 59 | process. */ | |
| 60 | float sys; | |
| 61 | ||
| 62 | /* Wall clock time. */ | |
| 63 | float wall; | |
| 64 | }; | |
| 65 | ||
| 66 | /* An enumeration of timing variable identifiers. Constructed from | |
| 67 | the contents of timevar.def. */ | |
| 68 | ||
| 69 | #define DEFTIMEVAR(identifier__, name__) \ | |
| 70 | identifier__, | |
| 71 | typedef enum | |
| 72 | { | |
| 73 | #include "timevar.def" | |
| 74 | TIMEVAR_LAST | |
| 75 | } | |
| 76 | timevar_id_t; | |
| 77 | #undef DEFTIMEVAR | |
| 78 | ||
| 79 | extern void init_timevar PARAMS ((void)); | |
| 80 | extern void timevar_push PARAMS ((timevar_id_t)); | |
| 81 | extern void timevar_pop PARAMS ((timevar_id_t)); | |
| 82 | extern void timevar_start PARAMS ((timevar_id_t)); | |
| 83 | extern void timevar_stop PARAMS ((timevar_id_t)); | |
| 84 | extern void timevar_get PARAMS ((timevar_id_t, struct timevar_time_def *)); | |
| 85 | extern void timevar_print PARAMS ((FILE *)); | |
| 86 | ||
| 87 | /* Provided for backward compatibility. */ | |
| 88 | extern long get_run_time PARAMS ((void)); | |
| 89 | extern void print_time PARAMS ((const char *, long)); | |
| 90 | ||
| 91 | #endif /* ! GCC_TIMEVAR_H */ |