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[deb_libcec.git] / src / lib / platform / util / timeutils.h
1 #pragma once
2 /*
3 * This file is part of the libCEC(R) library.
4 *
5 * libCEC(R) is Copyright (C) 2011-2012 Pulse-Eight Limited. All rights reserved.
6 * libCEC(R) is an original work, containing original code.
7 *
8 * libCEC(R) is a trademark of Pulse-Eight Limited.
9 *
10 * This program is dual-licensed; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 *
24 *
25 * Alternatively, you can license this library under a commercial license,
26 * please contact Pulse-Eight Licensing for more information.
27 *
28 * For more information contact:
29 * Pulse-Eight Licensing <license@pulse-eight.com>
30 * http://www.pulse-eight.com/
31 * http://www.pulse-eight.net/
32 */
33
34 #include "env.h"
35 #include "lib/platform/os.h"
36
37 #if defined(__APPLE__)
38 #include <mach/mach_time.h>
39 #include <CoreVideo/CVHostTime.h>
40 #elif defined(__WINDOWS__)
41 #include <time.h>
42 #else
43 #include <time.h>
44 #include <sys/time.h>
45 #endif
46
47 namespace PLATFORM
48 {
49 #if defined(__WINDOWS__)
50 struct timezone
51 {
52 int tz_minuteswest;
53 int tz_dsttime;
54 };
55
56 #define usleep(t) Sleep((DWORD)(t)/1000)
57
58 inline int gettimeofday(struct timeval *pcur_time, struct timezone *tz)
59 {
60 if (pcur_time == NULL)
61 {
62 SetLastError(EFAULT);
63 return -1;
64 }
65 struct _timeb current;
66
67 _ftime(&current);
68
69 pcur_time->tv_sec = (long) current.time;
70 pcur_time->tv_usec = current.millitm * 1000L;
71 if (tz)
72 {
73 tz->tz_minuteswest = current.timezone; /* minutes west of Greenwich */
74 tz->tz_dsttime = current.dstflag; /* type of dst correction */
75 }
76 return 0;
77 }
78 #endif
79
80 inline int64_t GetTimeMs()
81 {
82 #if defined(__APPLE__)
83 return (int64_t) (CVGetCurrentHostTime() / (int64_t)(CVGetHostClockFrequency() * 0.001));
84 #elif defined(__WINDOWS__)
85 LARGE_INTEGER tickPerSecond;
86 LARGE_INTEGER tick;
87 if (QueryPerformanceFrequency(&tickPerSecond))
88 {
89 QueryPerformanceCounter(&tick);
90 return (int64_t) (tick.QuadPart / (tickPerSecond.QuadPart / 1000.));
91 }
92 return -1;
93 #else
94 timespec time;
95 clock_gettime(CLOCK_MONOTONIC, &time);
96 return (int64_t)time.tv_sec * 1000 + time.tv_nsec / 1000000;
97 #endif
98 }
99
100 template <class T>
101 inline T GetTimeSec()
102 {
103 return (T)GetTimeMs() / (T)1000.0;
104 }
105
106 class CTimeout
107 {
108 public:
109 CTimeout(void) : m_iTarget(0) {}
110 CTimeout(uint32_t iTimeout) { Init(iTimeout); }
111
112 bool IsSet(void) const { return m_iTarget > 0; }
113 void Init(uint32_t iTimeout) { m_iTarget = GetTimeMs() + iTimeout; }
114
115 uint32_t TimeLeft(void) const
116 {
117 uint64_t iNow = GetTimeMs();
118 return (iNow > m_iTarget) ? 0 : (uint32_t)(m_iTarget - iNow);
119 }
120
121 private:
122 uint64_t m_iTarget;
123 };
124 };