root/trunk/libffado/src/libutil/Time.c

Revision 742, 2.9 kB (checked in by ppalmers, 13 years ago)

- Remove some obsolete support files and dirs

- Clean up the license statements in the source files. Everything is

GPL version 3 now.

- Add license and copyright notices to scons scripts

- Clean up some other text files

Line 
1 /*
2  * Copyright (C) 2005-2007 by Pieter Palmers
3  *
4  * This file is part of FFADO
5  * FFADO = Free Firewire (pro-)audio drivers for linux
6  *
7  * FFADO is based upon FreeBoB
8  *
9  * This program is free software: you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation, either version 3 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
21  *
22  */
23
24 /*
25  * Copied from the jackd/jackdmp sources
26  * function names changed in order to avoid naming problems when using this in
27  * a jackd backend.
28  */
29
30 /* Original license:
31  *
32  *  Copyright (C) 2001 Paul Davis
33  *  Copyright (C) 2004-2006 Grame
34  *
35  *  This program is free software; you can redistribute it and/or modify
36  *  it under the terms of the GNU General Public License as published by
37  *  the Free Software Foundation; either version 2 of the License, or
38  *  (at your option) any later version.
39  *
40  *  This program is distributed in the hope that it will be useful,
41  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
42  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
43  *  GNU General Public License for more details.
44  *
45  *  You should have received a copy of the GNU General Public License
46  *  along with this program; if not, write to the Free Software
47  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
48  *
49  */
50 #include "Time.h"
51
52 #ifdef GETCYCLE_TIME
53
54 #include <stdio.h>
55 freebob_microsecs_t GetMhz(void)
56 {
57         FILE *f = fopen("/proc/cpuinfo", "r");
58         if (f == 0)
59         {
60                 perror("can't open /proc/cpuinfo\n");
61                 exit(1);
62         }
63
64         for ( ; ; )
65         {
66                 freebob_microsecs_t mhz;
67                 int ret;
68                 char buf[1000];
69
70                 if (fgets(buf, sizeof(buf), f) == NULL) {
71                         fprintf (stderr,"FATAL: cannot locate cpu MHz in "
72                                     "/proc/cpuinfo\n");
73                         exit(1);
74                 }
75
76 #if defined(__powerpc__)
77                 ret = sscanf(buf, "clock\t: %" SCNu64 "MHz", &mhz);
78 #elif defined( __i386__ ) || defined (__hppa__)  || defined (__ia64__) || \
79       defined(__x86_64__)
80                 ret = sscanf(buf, "cpu MHz         : %" SCNu64, &mhz);
81 #elif defined( __sparc__ )
82                 ret = sscanf(buf, "Cpu0Bogo        : %" SCNu64, &mhz);
83 #elif defined( __mc68000__ )
84                 ret = sscanf(buf, "Clocking:       %" SCNu64, &mhz);
85 #elif defined( __s390__  )
86                 ret = sscanf(buf, "bogomips per cpu: %" SCNu64, &mhz);
87 #else /* MIPS, ARM, alpha */
88                 ret = sscanf(buf, "BogoMIPS        : %" SCNu64, &mhz);
89 #endif
90                 if (ret == 1)
91                 {
92                         fclose(f);
93                         return (freebob_microsecs_t)mhz;
94                 }
95         }
96 }
97
98 freebob_microsecs_t __freebob_cpu_mhz;
99
100 void InitTime()
101 {
102         __freebob_cpu_mhz = GetMhz();
103 }
104
105 #else
106 void InitTime()
107 {}
108
109 #endif
110
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