PolarSSL v1.1.4
timing.c
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1 /*
2  * Portable interface to the CPU cycle counter
3  *
4  * Copyright (C) 2006-2010, Brainspark B.V.
5  *
6  * This file is part of PolarSSL (http://www.polarssl.org)
7  * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
8  *
9  * All rights reserved.
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License as published by
13  * the Free Software Foundation; either version 2 of the License, or
14  * (at your option) any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19  * GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License along
22  * with this program; if not, write to the Free Software Foundation, Inc.,
23  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24  */
25 
26 #include "polarssl/config.h"
27 
28 #if defined(POLARSSL_TIMING_C)
29 
30 #include "polarssl/timing.h"
31 
32 #if defined(_WIN32)
33 
34 #include <windows.h>
35 #include <winbase.h>
36 
37 struct _hr_time
38 {
39  LARGE_INTEGER start;
40 };
41 
42 #else
43 
44 #include <unistd.h>
45 #include <sys/types.h>
46 #include <sys/time.h>
47 #include <signal.h>
48 #include <time.h>
49 
50 struct _hr_time
51 {
52  struct timeval start;
53 };
54 
55 #endif
56 
57 #if defined(POLARSSL_HAVE_ASM) && \
58  (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)
59 
60 unsigned long hardclock( void )
61 {
62  unsigned long tsc;
63  __asm rdtsc
64  __asm mov [tsc], eax
65  return( tsc );
66 }
67 
68 #else
69 #if defined(POLARSSL_HAVE_ASM) && defined(__GNUC__) && defined(__i386__)
70 
71 unsigned long hardclock( void )
72 {
73  unsigned long lo, hi;
74  asm( "rdtsc" : "=a" (lo), "=d" (hi) );
75  return( lo );
76 }
77 
78 #else
79 #if defined(POLARSSL_HAVE_ASM) && defined(__GNUC__) && \
80  (defined(__amd64__) || defined(__x86_64__))
81 
82 unsigned long hardclock( void )
83 {
84  unsigned long lo, hi;
85  asm( "rdtsc" : "=a" (lo), "=d" (hi) );
86  return( lo | (hi << 32) );
87 }
88 
89 #else
90 #if defined(POLARSSL_HAVE_ASM) && defined(__GNUC__) && \
91  (defined(__powerpc__) || defined(__ppc__))
92 
93 unsigned long hardclock( void )
94 {
95  unsigned long tbl, tbu0, tbu1;
96 
97  do
98  {
99  asm( "mftbu %0" : "=r" (tbu0) );
100  asm( "mftb %0" : "=r" (tbl ) );
101  asm( "mftbu %0" : "=r" (tbu1) );
102  }
103  while( tbu0 != tbu1 );
104 
105  return( tbl );
106 }
107 
108 #else
109 #if defined(POLARSSL_HAVE_ASM) && defined(__GNUC__) && defined(__sparc__)
110 
111 unsigned long hardclock( void )
112 {
113  unsigned long tick;
114  asm( ".byte 0x83, 0x41, 0x00, 0x00" );
115  asm( "mov %%g1, %0" : "=r" (tick) );
116  return( tick );
117 }
118 
119 #else
120 #if defined(POLARSSL_HAVE_ASM) && defined(__GNUC__) && defined(__alpha__)
121 
122 unsigned long hardclock( void )
123 {
124  unsigned long cc;
125  asm( "rpcc %0" : "=r" (cc) );
126  return( cc & 0xFFFFFFFF );
127 }
128 
129 #else
130 #if defined(POLARSSL_HAVE_ASM) && defined(__GNUC__) && defined(__ia64__)
131 
132 unsigned long hardclock( void )
133 {
134  unsigned long itc;
135  asm( "mov %0 = ar.itc" : "=r" (itc) );
136  return( itc );
137 }
138 
139 #else
140 #if defined(_MSC_VER)
141 
142 unsigned long hardclock( void )
143 {
144  LARGE_INTEGER offset;
145 
146  QueryPerformanceCounter( &offset );
147 
148  return (unsigned long)( offset.QuadPart );
149 }
150 
151 #else
152 
153 static int hardclock_init = 0;
154 static struct timeval tv_init;
155 
156 unsigned long hardclock( void )
157 {
158  struct timeval tv_cur;
159 
160  if( hardclock_init == 0 )
161  {
162  gettimeofday( &tv_init, NULL );
163  hardclock_init = 1;
164  }
165 
166  gettimeofday( &tv_cur, NULL );
167  return( ( tv_cur.tv_sec - tv_init.tv_sec ) * 1000000
168  + ( tv_cur.tv_usec - tv_init.tv_usec ) );
169 }
170 
171 #endif /* generic */
172 #endif /* WIN32 */
173 #endif /* IA-64 */
174 #endif /* Alpha */
175 #endif /* SPARC8 */
176 #endif /* PowerPC */
177 #endif /* AMD64 */
178 #endif /* i586+ */
179 
180 volatile int alarmed = 0;
181 
182 #if defined(_WIN32)
183 
184 unsigned long get_timer( struct hr_time *val, int reset )
185 {
186  unsigned long delta;
187  LARGE_INTEGER offset, hfreq;
188  struct _hr_time *t = (struct _hr_time *) val;
189 
190  QueryPerformanceCounter( &offset );
191  QueryPerformanceFrequency( &hfreq );
192 
193  delta = (unsigned long)( ( 1000 *
194  ( offset.QuadPart - t->start.QuadPart ) ) /
195  hfreq.QuadPart );
196 
197  if( reset )
198  QueryPerformanceCounter( &t->start );
199 
200  return( delta );
201 }
202 
203 DWORD WINAPI TimerProc( LPVOID uElapse )
204 {
205  Sleep( (DWORD) uElapse );
206  alarmed = 1;
207  return( TRUE );
208 }
209 
210 void set_alarm( int seconds )
211 {
212  DWORD ThreadId;
213 
214  alarmed = 0;
215  CloseHandle( CreateThread( NULL, 0, TimerProc,
216  (LPVOID) ( seconds * 1000 ), 0, &ThreadId ) );
217 }
218 
219 void m_sleep( int milliseconds )
220 {
221  Sleep( milliseconds );
222 }
223 
224 #else
225 
226 unsigned long get_timer( struct hr_time *val, int reset )
227 {
228  unsigned long delta;
229  struct timeval offset;
230  struct _hr_time *t = (struct _hr_time *) val;
231 
232  gettimeofday( &offset, NULL );
233 
234  delta = ( offset.tv_sec - t->start.tv_sec ) * 1000
235  + ( offset.tv_usec - t->start.tv_usec ) / 1000;
236 
237  if( reset )
238  {
239  t->start.tv_sec = offset.tv_sec;
240  t->start.tv_usec = offset.tv_usec;
241  }
242 
243  return( delta );
244 }
245 
246 static void sighandler( int signum )
247 {
248  alarmed = 1;
249  signal( signum, sighandler );
250 }
251 
252 void set_alarm( int seconds )
253 {
254  alarmed = 0;
255  signal( SIGALRM, sighandler );
256  alarm( seconds );
257 }
258 
259 void m_sleep( int milliseconds )
260 {
261  struct timeval tv;
262 
263  tv.tv_sec = milliseconds / 1000;
264  tv.tv_usec = milliseconds * 1000;
265 
266  select( 0, NULL, NULL, NULL, &tv );
267 }
268 
269 #endif
270 
271 #endif