xref: /PHP-8.3/Zend/zend_hrtime.h (revision 6c4e3c0f)
1 /*
2    +----------------------------------------------------------------------+
3    | Copyright (c) The PHP Group                                          |
4    +----------------------------------------------------------------------+
5    | This source file is subject to version 3.01 of the PHP license,      |
6    | that is bundled with this package in the file LICENSE, and is        |
7    | available through the world-wide-web at the following url:           |
8    | https://www.php.net/license/3_01.txt                                 |
9    | If you did not receive a copy of the PHP license and are unable to   |
10    | obtain it through the world-wide-web, please send a note to          |
11    | license@php.net so we can mail you a copy immediately.               |
12    +----------------------------------------------------------------------+
13    | Author: Niklas Keller <kelunik@php.net>                              |
14    | Author: Anatol Belski <ab@php.net>                                   |
15    +----------------------------------------------------------------------+
16 */
17 
18 #ifndef ZEND_HRTIME_H
19 #define ZEND_HRTIME_H
20 
21 #include "zend_portability.h"
22 #include "zend_types.h"
23 
24 #ifdef HAVE_UNISTD_H
25 # include <unistd.h>
26 #endif
27 #ifndef PHP_WIN32
28 # include <time.h>
29 #endif
30 
31 /* This file reuses code parts from the cross-platform timer library
32 	Public Domain - 2011 Mattias Jansson / Rampant Pixels */
33 
34 #define ZEND_HRTIME_PLATFORM_POSIX   0
35 #define ZEND_HRTIME_PLATFORM_WINDOWS 0
36 #define ZEND_HRTIME_PLATFORM_APPLE   0
37 #define ZEND_HRTIME_PLATFORM_HPUX    0
38 #define ZEND_HRTIME_PLATFORM_AIX     0
39 
40 #if defined(_POSIX_TIMERS) && ((_POSIX_TIMERS > 0) || defined(__OpenBSD__)) && defined(_POSIX_MONOTONIC_CLOCK) && defined(CLOCK_MONOTONIC)
41 # undef  ZEND_HRTIME_PLATFORM_POSIX
42 # define ZEND_HRTIME_PLATFORM_POSIX 1
43 #elif defined(_WIN32) || defined(_WIN64)
44 # undef  ZEND_HRTIME_PLATFORM_WINDOWS
45 # define ZEND_HRTIME_PLATFORM_WINDOWS 1
46 #elif defined(__APPLE__)
47 # undef  ZEND_HRTIME_PLATFORM_APPLE
48 # define ZEND_HRTIME_PLATFORM_APPLE 1
49 #elif (defined(__hpux) || defined(hpux)) || ((defined(__sun__) || defined(__sun) || defined(sun)) && (defined(__SVR4) || defined(__svr4__)))
50 # undef  ZEND_HRTIME_PLATFORM_HPUX
51 # define ZEND_HRTIME_PLATFORM_HPUX 1
52 #elif defined(_AIX)
53 # undef  ZEND_HRTIME_PLATFORM_AIX
54 # define ZEND_HRTIME_PLATFORM_AIX 1
55 #endif
56 
57 #define ZEND_HRTIME_AVAILABLE (ZEND_HRTIME_PLATFORM_POSIX || ZEND_HRTIME_PLATFORM_WINDOWS || ZEND_HRTIME_PLATFORM_APPLE || ZEND_HRTIME_PLATFORM_HPUX || ZEND_HRTIME_PLATFORM_AIX)
58 
59 BEGIN_EXTERN_C()
60 
61 #if ZEND_HRTIME_PLATFORM_WINDOWS
62 
63 ZEND_API extern double zend_hrtime_timer_scale;
64 
65 #elif ZEND_HRTIME_PLATFORM_APPLE
66 
67 # include <mach/mach_time.h>
68 # include <string.h>
69 ZEND_API extern mach_timebase_info_data_t zend_hrtime_timerlib_info;
70 
71 #endif
72 
73 #define ZEND_NANO_IN_SEC UINT64_C(1000000000)
74 
75 typedef uint64_t zend_hrtime_t;
76 
77 void zend_startup_hrtime(void);
78 
zend_hrtime(void)79 static zend_always_inline zend_hrtime_t zend_hrtime(void)
80 {
81 #if ZEND_HRTIME_PLATFORM_WINDOWS
82 	LARGE_INTEGER lt = {0};
83 	QueryPerformanceCounter(&lt);
84 	return (zend_hrtime_t)((zend_hrtime_t)lt.QuadPart * zend_hrtime_timer_scale);
85 #elif ZEND_HRTIME_PLATFORM_APPLE
86 	return (zend_hrtime_t)mach_absolute_time() * zend_hrtime_timerlib_info.numer / zend_hrtime_timerlib_info.denom;
87 #elif ZEND_HRTIME_PLATFORM_POSIX
88 	struct timespec ts = { .tv_sec = 0, .tv_nsec = 0 };
89 	if (EXPECTED(0 == clock_gettime(CLOCK_MONOTONIC, &ts))) {
90 		return ((zend_hrtime_t) ts.tv_sec * (zend_hrtime_t)ZEND_NANO_IN_SEC) + ts.tv_nsec;
91 	}
92 	return 0;
93 #elif ZEND_HRTIME_PLATFORM_HPUX
94 	return (zend_hrtime_t) gethrtime();
95 #elif  ZEND_HRTIME_PLATFORM_AIX
96 	timebasestruct_t t;
97 	read_wall_time(&t, TIMEBASE_SZ);
98 	time_base_to_time(&t, TIMEBASE_SZ);
99 	return (zend_hrtime_t) t.tb_high * (zend_hrtime_t)NANO_IN_SEC + t.tb_low;
100 #else
101 	return 0;
102 #endif
103 }
104 
105 END_EXTERN_C()
106 
107 #endif /* ZEND_HRTIME_H */
108