* elf32-spu.c (build_stub): Fix malloc under-allocation.
[binutils.git] / gold / timer.cc
blob1423663281a5cc92365aaab5129080ffc44a7ccb
1 // timer.cc -- helper class for time accounting
3 // Copyright 2009, 2010 Free Software Foundation, Inc.
4 // Written by Rafael Avila de Espindola <espindola@google.com>.
6 // This file is part of gold.
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
23 #include "gold.h"
25 #ifdef HAVE_TIMES
26 #include <sys/times.h>
27 #endif
29 #include "libiberty.h"
31 #include "timer.h"
33 namespace gold
36 // Class Timer
38 Timer::Timer()
40 this->start_time_.wall = 0;
41 this->start_time_.user = 0;
42 this->start_time_.sys = 0;
45 // Start counting the time.
46 void
47 Timer::start()
49 this->get_time(&this->start_time_);
52 // Record the time used by pass N (0 <= N <= 2).
53 void
54 Timer::stamp(int n)
56 gold_assert(n >= 0 && n <= 2);
57 TimeStats& thispass = this->pass_times_[n];
58 this->get_time(&thispass);
61 #if HAVE_SYSCONF && defined _SC_CLK_TCK
62 # define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
63 #else
64 # ifdef CLK_TCK
65 # define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
66 # else
67 # ifdef HZ
68 # define TICKS_PER_SECOND HZ /* traditional UNIX */
69 # else
70 # define TICKS_PER_SECOND 100 /* often the correct value */
71 # endif
72 # endif
73 #endif
75 // times returns statistics in clock_t units. This variable will hold the
76 // conversion factor to seconds. We use a variable that is initialized once
77 // because sysconf can be slow.
78 static long ticks_per_sec;
79 class Timer_init
81 public:
82 Timer_init()
84 ticks_per_sec = TICKS_PER_SECOND;
87 Timer_init timer_init;
89 // Write the current time information.
90 void
91 Timer::get_time(TimeStats *now)
93 #ifdef HAVE_TIMES
94 tms t;
95 now->wall = (times(&t) * 1000) / ticks_per_sec;
96 now->user = (t.tms_utime * 1000) / ticks_per_sec;
97 now->sys = (t.tms_stime * 1000) / ticks_per_sec;
98 #else
99 now->wall = get_run_time() / 1000;
100 now->user = 0;
101 now->sys = 0;
102 #endif
105 // Return the stats since start was called.
106 Timer::TimeStats
107 Timer::get_elapsed_time()
109 TimeStats now;
110 this->get_time(&now);
111 TimeStats delta;
112 delta.wall = now.wall - this->start_time_.wall;
113 delta.user = now.user - this->start_time_.user;
114 delta.sys = now.sys - this->start_time_.sys;
115 return delta;
118 // Return the stats for pass N (0 <= N <= 2).
119 Timer::TimeStats
120 Timer::get_pass_time(int n)
122 gold_assert(n >= 0 && n <= 2);
123 TimeStats thispass = this->pass_times_[n];
124 TimeStats& lastpass = n > 0 ? this->pass_times_[n-1] : this->start_time_;
125 thispass.wall -= lastpass.wall;
126 thispass.user -= lastpass.user;
127 thispass.sys -= lastpass.sys;
128 return thispass;