Merge remote-tracking branch 'psnip_clock/master'
This commit is contained in:
commit
2c226e0ec8
1 changed files with 478 additions and 0 deletions
478
clock.h
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478
clock.h
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/* Clocks (v1)
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* Portable Snippets - https://github.com/nemequ/portable-snippets
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||||
* Created by Evan Nemerson <evan@nemerson.com>
|
||||
*
|
||||
* To the extent possible under law, the authors have waived all
|
||||
* copyright and related or neighboring rights to this code. For
|
||||
* details, see the Creative Commons Zero 1.0 Universal license at
|
||||
* https://creativecommons.org/publicdomain/zero/1.0/
|
||||
*
|
||||
* Modified by Connor Olding, 2017
|
||||
*/
|
||||
|
||||
#if !defined(PSNIP_CLOCK_H)
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||||
#define PSNIP_CLOCK_H
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||||
|
||||
#if !defined(PSNIP_CLOCK_STATIC_INLINE)
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# if defined(__GNUC__)
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||||
# define PSNIP_CLOCK__COMPILER_ATTRIBUTES __attribute__((__unused__))
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||||
# else
|
||||
# define PSNIP_CLOCK__COMPILER_ATTRIBUTES
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||||
# endif
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||||
|
||||
# define PSNIP_CLOCK__FUNCTION PSNIP_CLOCK__COMPILER_ATTRIBUTES static
|
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#endif
|
||||
|
||||
enum PsnipClockType {
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/* This clock provides the current time, in units since 1970-01-01
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* 00:00:00 UTC not including leap seconds. In other words, UNIX
|
||||
* time. Keep in mind that this clock doesn't account for leap
|
||||
* seconds, and can go backwards (think NTP adjustments). */
|
||||
PSNIP_CLOCK_TYPE_WALL = 1,
|
||||
/* The CPU time is a clock which increases only when the current
|
||||
* process is active (i.e., it doesn't increment while blocking on
|
||||
* I/O). */
|
||||
PSNIP_CLOCK_TYPE_CPU = 2,
|
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/* Monotonic time is always running (unlike CPU time), but it only
|
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ever moves forward unless you reboot the system. Things like NTP
|
||||
adjustments have no effect on this clock. */
|
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PSNIP_CLOCK_TYPE_MONOTONIC = 3
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||||
};
|
||||
|
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struct PsnipClockTimespec {
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uint64_t seconds;
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uint64_t nanoseconds;
|
||||
};
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||||
|
||||
/* Methods we support: */
|
||||
|
||||
#define PSNIP_CLOCK_METHOD_CLOCK_GETTIME 1
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#define PSNIP_CLOCK_METHOD_TIME 2
|
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#define PSNIP_CLOCK_METHOD_GETTIMEOFDAY 3
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#define PSNIP_CLOCK_METHOD_QUERYPERFORMANCECOUNTER 4
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#define PSNIP_CLOCK_METHOD_MACH_ABSOLUTE_TIME 5
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#define PSNIP_CLOCK_METHOD_CLOCK 6
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#define PSNIP_CLOCK_METHOD_GETPROCESSTIMES 7
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#define PSNIP_CLOCK_METHOD_GETRUSAGE 8
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#define PSNIP_CLOCK_METHOD_GETSYSTEMTIMEPRECISEASFILETIME 9
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#define PSNIP_CLOCK_METHOD_GETTICKCOUNT64 10
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|
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#include <assert.h>
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|
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#if defined(HEDLEY_UNREACHABLE)
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# define PSNIP_CLOCK_UNREACHABLE() HEDLEY_UNREACHABLE()
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#else
|
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# define PSNIP_CLOCK_UNREACHABLE() assert(0)
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#endif
|
||||
|
||||
/* Choose an implementation */
|
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|
||||
/* #undef PSNIP_CLOCK_WALL_METHOD */
|
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/* #undef PSNIP_CLOCK_CPU_METHOD */
|
||||
/* #undef PSNIP_CLOCK_MONOTONIC_METHOD */
|
||||
|
||||
/* We want to be able to detect the libc implementation, so we include
|
||||
<limits.h> (<features.h> isn't available everywhere). */
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||||
|
||||
#if defined(__unix__) || defined(__unix) || defined(__linux__)
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||||
# include <limits.h>
|
||||
# include <unistd.h>
|
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#endif
|
||||
|
||||
#if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0)
|
||||
/* These are known to work without librt. If you know of others
|
||||
* please let us know so we can add them. */
|
||||
# if \
|
||||
(defined(__GLIBC__) && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 17))) || \
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(defined(__FreeBSD__))
|
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# define PSNIP_CLOCK_HAVE_CLOCK_GETTIME
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# elif !defined(PSNIP_CLOCK_NO_LIBRT)
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# define PSNIP_CLOCK_HAVE_CLOCK_GETTIME
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# endif
|
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#endif
|
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|
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#if defined(_WIN32)
|
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# if !defined(PSNIP_CLOCK_CPU_METHOD)
|
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# define PSNIP_CLOCK_CPU_METHOD PSNIP_CLOCK_METHOD_GETPROCESSTIMES
|
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# endif
|
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# if !defined(PSNIP_CLOCK_MONOTONIC_METHOD)
|
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# define PSNIP_CLOCK_MONOTONIC_METHOD PSNIP_CLOCK_METHOD_QUERYPERFORMANCECOUNTER
|
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# endif
|
||||
#endif
|
||||
|
||||
#if defined(__MACH__)
|
||||
# if !defined(PSNIP_CLOCK_MONOTONIC_METHOD)
|
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# define PSNIP_CLOCK_MONOTONIC_METHOD PSNIP_CLOCK_METHOD_MACH_ABSOLUTE_TIME
|
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# endif
|
||||
#endif
|
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|
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#if defined(PSNIP_CLOCK_HAVE_CLOCK_GETTIME)
|
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# include <time.h>
|
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# if !defined(PSNIP_CLOCK_WALL_METHOD)
|
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# if defined(CLOCK_REALTIME_PRECISE)
|
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# define PSNIP_CLOCK_WALL_METHOD PSNIP_CLOCK_METHOD_CLOCK_GETTIME
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# define PSNIP_CLOCK_CLOCK_GETTIME_WALL CLOCK_REALTIME_PRECISE
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# elif !defined(__sun)
|
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# define PSNIP_CLOCK_WALL_METHOD PSNIP_CLOCK_METHOD_CLOCK_GETTIME
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# define PSNIP_CLOCK_CLOCK_GETTIME_WALL CLOCK_REALTIME
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# endif
|
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# endif
|
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# if !defined(PSNIP_CLOCK_CPU_METHOD)
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# if defined(_POSIX_CPUTIME) || defined(CLOCK_PROCESS_CPUTIME_ID)
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# define PSNIP_CLOCK_CPU_METHOD PSNIP_CLOCK_METHOD_CLOCK_GETTIME
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# define PSNIP_CLOCK_CLOCK_GETTIME_CPU CLOCK_PROCESS_CPUTIME_ID
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# elif defined(CLOCK_VIRTUAL)
|
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# define PSNIP_CLOCK_CPU_METHOD PSNIP_CLOCK_METHOD_CLOCK_GETTIME
|
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# define PSNIP_CLOCK_CLOCK_GETTIME_CPU CLOCK_VIRTUAL
|
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# endif
|
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# endif
|
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# if !defined(PSNIP_CLOCK_MONOTONIC_METHOD)
|
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# if defined(CLOCK_MONOTONIC_RAW) && !defined(__EMSCRIPTEN__)
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# define PSNIP_CLOCK_MONOTONIC_METHOD PSNIP_CLOCK_METHOD_CLOCK_GETTIME
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# define PSNIP_CLOCK_CLOCK_GETTIME_MONOTONIC CLOCK_MONOTONIC_RAW
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# elif defined(CLOCK_MONOTONIC_PRECISE)
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# define PSNIP_CLOCK_MONOTONIC_METHOD PSNIP_CLOCK_METHOD_CLOCK_GETTIME
|
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# define PSNIP_CLOCK_CLOCK_GETTIME_MONOTONIC CLOCK_MONOTONIC_PRECISE
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# elif defined(_POSIX_MONOTONIC_CLOCK) || defined(CLOCK_MONOTONIC)
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# define PSNIP_CLOCK_MONOTONIC_METHOD PSNIP_CLOCK_METHOD_CLOCK_GETTIME
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# define PSNIP_CLOCK_CLOCK_GETTIME_MONOTONIC CLOCK_MONOTONIC
|
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# endif
|
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# endif
|
||||
#endif
|
||||
|
||||
#if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 200112L)
|
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# if !defined(PSNIP_CLOCK_WALL_METHOD)
|
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# define PSNIP_CLOCK_WALL_METHOD PSNIP_CLOCK_METHOD_GETTIMEOFDAY
|
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# endif
|
||||
#endif
|
||||
|
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#if !defined(PSNIP_CLOCK_WALL_METHOD)
|
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# define PSNIP_CLOCK_WALL_METHOD PSNIP_CLOCK_METHOD_TIME
|
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#endif
|
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|
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#if !defined(PSNIP_CLOCK_CPU_METHOD)
|
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# define PSNIP_CLOCK_CPU_METHOD PSNIP_CLOCK_METHOD_CLOCK
|
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#endif
|
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|
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/* Primarily here for testing. */
|
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#if !defined(PSNIP_CLOCK_MONOTONIC_METHOD) && defined(PSNIP_CLOCK_REQUIRE_MONOTONIC)
|
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# error No monotonic clock found.
|
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#endif
|
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|
||||
/* Implementations */
|
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|
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#if \
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(defined(PSNIP_CLOCK_CPU_METHOD) && (PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_CLOCK_GETTIME)) || \
|
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(defined(PSNIP_CLOCK_WALL_METHOD) && (PSNIP_CLOCK_WALL_METHOD == PSNIP_CLOCK_METHOD_CLOCK_GETTIME)) || \
|
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(defined(PSNIP_CLOCK_MONOTONIC_METHOD) && (PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_CLOCK_GETTIME)) || \
|
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(defined(PSNIP_CLOCK_CPU_METHOD) && (PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_CLOCK)) || \
|
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(defined(PSNIP_CLOCK_WALL_METHOD) && (PSNIP_CLOCK_WALL_METHOD == PSNIP_CLOCK_METHOD_CLOCK)) || \
|
||||
(defined(PSNIP_CLOCK_MONOTONIC_METHOD) && (PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_CLOCK)) || \
|
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(defined(PSNIP_CLOCK_CPU_METHOD) && (PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_TIME)) || \
|
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(defined(PSNIP_CLOCK_WALL_METHOD) && (PSNIP_CLOCK_WALL_METHOD == PSNIP_CLOCK_METHOD_TIME)) || \
|
||||
(defined(PSNIP_CLOCK_MONOTONIC_METHOD) && (PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_TIME))
|
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# include <time.h>
|
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#endif
|
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|
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#if \
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(defined(PSNIP_CLOCK_CPU_METHOD) && (PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_GETTIMEOFDAY)) || \
|
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(defined(PSNIP_CLOCK_WALL_METHOD) && (PSNIP_CLOCK_WALL_METHOD == PSNIP_CLOCK_METHOD_GETTIMEOFDAY)) || \
|
||||
(defined(PSNIP_CLOCK_MONOTONIC_METHOD) && (PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_GETTIMEOFDAY))
|
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# include <sys/time.h>
|
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#endif
|
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|
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#if \
|
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(defined(PSNIP_CLOCK_CPU_METHOD) && (PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_GETPROCESSTIMES)) || \
|
||||
(defined(PSNIP_CLOCK_WALL_METHOD) && (PSNIP_CLOCK_WALL_METHOD == PSNIP_CLOCK_METHOD_GETPROCESSTIMES)) || \
|
||||
(defined(PSNIP_CLOCK_MONOTONIC_METHOD) && (PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_GETPROCESSTIMES)) || \
|
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(defined(PSNIP_CLOCK_CPU_METHOD) && (PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_GETTICKCOUNT64)) || \
|
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(defined(PSNIP_CLOCK_WALL_METHOD) && (PSNIP_CLOCK_WALL_METHOD == PSNIP_CLOCK_METHOD_GETTICKCOUNT64)) || \
|
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(defined(PSNIP_CLOCK_MONOTONIC_METHOD) && (PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_GETTICKCOUNT64))
|
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typedef struct _FILETIME {
|
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uint32_t dwLowDateTime;
|
||||
uint32_t dwHighDateTime;
|
||||
} FILETIME;
|
||||
typedef union _LARGE_INTEGER {
|
||||
struct {
|
||||
uint32_t LowPart;
|
||||
int32_t HighPart;
|
||||
};
|
||||
struct {
|
||||
uint32_t LowPart;
|
||||
int32_t HighPart;
|
||||
} u;
|
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int64_t QuadPart;
|
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} LARGE_INTEGER;
|
||||
#ifdef __cplusplus
|
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#define PSNIP_EXTERN extern "C"
|
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#else
|
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#define PSNIP_EXTERN
|
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#endif
|
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PSNIP_EXTERN void * __stdcall GetCurrentProcess(void);
|
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PSNIP_EXTERN int __stdcall QueryPerformanceFrequency(LARGE_INTEGER *lpFrequency);
|
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PSNIP_EXTERN int __stdcall QueryPerformanceCounter(LARGE_INTEGER *lpPerformanceCount);
|
||||
PSNIP_EXTERN int __stdcall GetProcessTimes(
|
||||
void *hProcess,
|
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FILETIME *lpCreationTime,
|
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FILETIME *lpExitTime,
|
||||
FILETIME *lpKernelTime,
|
||||
FILETIME *lpUserTime
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||||
);
|
||||
#endif
|
||||
|
||||
#if \
|
||||
(defined(PSNIP_CLOCK_CPU_METHOD) && (PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_GETRUSAGE)) || \
|
||||
(defined(PSNIP_CLOCK_WALL_METHOD) && (PSNIP_CLOCK_WALL_METHOD == PSNIP_CLOCK_METHOD_GETRUSAGE)) || \
|
||||
(defined(PSNIP_CLOCK_MONOTONIC_METHOD) && (PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_GETRUSAGE))
|
||||
# include <sys/time.h>
|
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# include <sys/resource.h>
|
||||
#endif
|
||||
|
||||
#if \
|
||||
(defined(PSNIP_CLOCK_CPU_METHOD) && (PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_MACH_ABSOLUTE_TIME)) || \
|
||||
(defined(PSNIP_CLOCK_WALL_METHOD) && (PSNIP_CLOCK_WALL_METHOD == PSNIP_CLOCK_METHOD_MACH_ABSOLUTE_TIME)) || \
|
||||
(defined(PSNIP_CLOCK_MONOTONIC_METHOD) && (PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_MACH_ABSOLUTE_TIME))
|
||||
# include <CoreServices/CoreServices.h>
|
||||
# include <mach/mach.h>
|
||||
# include <mach/mach_time.h>
|
||||
#endif
|
||||
|
||||
/*** Implementations ***/
|
||||
|
||||
#define PSNIP_CLOCK_NSEC_PER_SEC ((uint32_t) (1000000000ULL))
|
||||
|
||||
#if \
|
||||
(defined(PSNIP_CLOCK_CPU_METHOD) && (PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_CLOCK_GETTIME)) || \
|
||||
(defined(PSNIP_CLOCK_WALL_METHOD) && (PSNIP_CLOCK_WALL_METHOD == PSNIP_CLOCK_METHOD_CLOCK_GETTIME)) || \
|
||||
(defined(PSNIP_CLOCK_MONOTONIC_METHOD) && (PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_CLOCK_GETTIME))
|
||||
PSNIP_CLOCK__FUNCTION uint32_t
|
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psnip_clock__clock_getres (clockid_t clk_id) {
|
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struct timespec res;
|
||||
int r;
|
||||
|
||||
r = clock_getres(clk_id, &res);
|
||||
if (r != 0)
|
||||
return 0;
|
||||
|
||||
return (uint32_t) (PSNIP_CLOCK_NSEC_PER_SEC / res.tv_nsec);
|
||||
}
|
||||
|
||||
PSNIP_CLOCK__FUNCTION int
|
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psnip_clock__clock_gettime (clockid_t clk_id, struct PsnipClockTimespec* res) {
|
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struct timespec ts;
|
||||
|
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if (clock_gettime(clk_id, &ts) != 0)
|
||||
return -10;
|
||||
|
||||
res->seconds = (uint64_t) (ts.tv_sec);
|
||||
res->nanoseconds = (uint64_t) (ts.tv_nsec);
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
PSNIP_CLOCK__FUNCTION uint32_t
|
||||
psnip_clock_wall_get_precision (void) {
|
||||
#if !defined(PSNIP_CLOCK_WALL_METHOD)
|
||||
return 0;
|
||||
#elif defined(PSNIP_CLOCK_WALL_METHOD) && PSNIP_CLOCK_WALL_METHOD == PSNIP_CLOCK_METHOD_CLOCK_GETTIME
|
||||
return psnip_clock__clock_getres(PSNIP_CLOCK_CLOCK_GETTIME_WALL);
|
||||
#elif defined(PSNIP_CLOCK_WALL_METHOD) && PSNIP_CLOCK_WALL_METHOD == PSNIP_CLOCK_METHOD_GETTIMEOFDAY
|
||||
return 1000000;
|
||||
#elif defined(PSNIP_CLOCK_WALL_METHOD) && PSNIP_CLOCK_WALL_METHOD == PSNIP_CLOCK_METHOD_TIME
|
||||
return 1;
|
||||
#else
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
PSNIP_CLOCK__FUNCTION int
|
||||
psnip_clock_wall_get_time (struct PsnipClockTimespec* res) {
|
||||
(void) res;
|
||||
|
||||
#if !defined(PSNIP_CLOCK_WALL_METHOD)
|
||||
return -2;
|
||||
#elif defined(PSNIP_CLOCK_WALL_METHOD) && PSNIP_CLOCK_WALL_METHOD == PSNIP_CLOCK_METHOD_CLOCK_GETTIME
|
||||
return psnip_clock__clock_gettime(PSNIP_CLOCK_CLOCK_GETTIME_WALL, res);
|
||||
#elif defined(PSNIP_CLOCK_WALL_METHOD) && PSNIP_CLOCK_WALL_METHOD == PSNIP_CLOCK_METHOD_TIME
|
||||
res->seconds = time(NULL);
|
||||
res->nanoseconds = 0;
|
||||
#elif defined(PSNIP_CLOCK_WALL_METHOD) && PSNIP_CLOCK_WALL_METHOD == PSNIP_CLOCK_METHOD_GETTIMEOFDAY
|
||||
struct timeval tv;
|
||||
|
||||
if (gettimeofday(&tv, NULL) != 0)
|
||||
return -6;
|
||||
|
||||
res->seconds = tv.tv_sec;
|
||||
res->nanoseconds = tv.tv_usec * 1000;
|
||||
#else
|
||||
return -2;
|
||||
#endif
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
PSNIP_CLOCK__FUNCTION uint32_t
|
||||
psnip_clock_cpu_get_precision (void) {
|
||||
#if !defined(PSNIP_CLOCK_CPU_METHOD)
|
||||
return 0;
|
||||
#elif defined(PSNIP_CLOCK_CPU_METHOD) && PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_CLOCK_GETTIME
|
||||
return psnip_clock__clock_getres(PSNIP_CLOCK_CLOCK_GETTIME_CPU);
|
||||
#elif defined(PSNIP_CLOCK_CPU_METHOD) && PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_CLOCK
|
||||
return CLOCKS_PER_SEC;
|
||||
#elif defined(PSNIP_CLOCK_CPU_METHOD) && PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_GETPROCESSTIMES
|
||||
return PSNIP_CLOCK_NSEC_PER_SEC / 100;
|
||||
#else
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
PSNIP_CLOCK__FUNCTION int
|
||||
psnip_clock_cpu_get_time (struct PsnipClockTimespec* res) {
|
||||
#if !defined(PSNIP_CLOCK_CPU_METHOD)
|
||||
(void) res;
|
||||
return -2;
|
||||
#elif defined(PSNIP_CLOCK_CPU_METHOD) && PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_CLOCK_GETTIME
|
||||
return psnip_clock__clock_gettime(PSNIP_CLOCK_CLOCK_GETTIME_CPU, res);
|
||||
#elif defined(PSNIP_CLOCK_CPU_METHOD) && PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_CLOCK
|
||||
clock_t t = clock();
|
||||
if (t == ((clock_t) -1))
|
||||
return -5;
|
||||
res->seconds = t / CLOCKS_PER_SEC;
|
||||
res->nanoseconds = (t % CLOCKS_PER_SEC) * (PSNIP_CLOCK_NSEC_PER_SEC / CLOCKS_PER_SEC);
|
||||
#elif defined(PSNIP_CLOCK_CPU_METHOD) && PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_GETPROCESSTIMES
|
||||
FILETIME CreationTime, ExitTime, KernelTime, UserTime;
|
||||
LARGE_INTEGER date, adjust;
|
||||
|
||||
if (!GetProcessTimes(GetCurrentProcess(), &CreationTime, &ExitTime, &KernelTime, &UserTime))
|
||||
return -7;
|
||||
|
||||
/* http://www.frenk.com/2009/12/convert-filetime-to-unix-timestamp/ */
|
||||
date.HighPart = UserTime.dwHighDateTime;
|
||||
date.LowPart = UserTime.dwLowDateTime;
|
||||
adjust.QuadPart = 11644473600000 * 10000;
|
||||
date.QuadPart -= adjust.QuadPart;
|
||||
|
||||
res->seconds = date.QuadPart / 10000000;
|
||||
res->nanoseconds = (date.QuadPart % 10000000) * (PSNIP_CLOCK_NSEC_PER_SEC / 100);
|
||||
#elif PSNIP_CLOCK_CPU_METHOD == PSNIP_CLOCK_METHOD_GETRUSAGE
|
||||
struct rusage usage;
|
||||
if (getrusage(RUSAGE_SELF, &usage) != 0)
|
||||
return -8;
|
||||
|
||||
res->seconds = usage.ru_utime.tv_sec;
|
||||
res->nanoseconds = tv.tv_usec * 1000;
|
||||
#else
|
||||
(void) res;
|
||||
return -2;
|
||||
#endif
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
PSNIP_CLOCK__FUNCTION uint32_t
|
||||
psnip_clock_monotonic_get_precision (void) {
|
||||
#if !defined(PSNIP_CLOCK_MONOTONIC_METHOD)
|
||||
return 0;
|
||||
#elif defined(PSNIP_CLOCK_MONOTONIC_METHOD) && PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_CLOCK_GETTIME
|
||||
return psnip_clock__clock_getres(PSNIP_CLOCK_CLOCK_GETTIME_MONOTONIC);
|
||||
#elif defined(PSNIP_CLOCK_MONOTONIC_METHOD) && PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_MACH_ABSOLUTE_TIME
|
||||
static mach_timebase_info_data_t tbi = { 0, };
|
||||
if (tbi.denom == 0)
|
||||
mach_timebase_info(&tbi);
|
||||
return (uint32_t) (tbi.numer / tbi.denom);
|
||||
#elif defined(PSNIP_CLOCK_MONOTONIC_METHOD) && PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_GETTICKCOUNT64
|
||||
return 1000;
|
||||
#elif defined(PSNIP_CLOCK_MONOTONIC_METHOD) && PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_QUERYPERFORMANCECOUNTER
|
||||
LARGE_INTEGER Frequency;
|
||||
QueryPerformanceFrequency(&Frequency);
|
||||
return (uint32_t) ((Frequency.QuadPart > PSNIP_CLOCK_NSEC_PER_SEC) ? PSNIP_CLOCK_NSEC_PER_SEC : Frequency.QuadPart);
|
||||
#else
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
PSNIP_CLOCK__FUNCTION int
|
||||
psnip_clock_monotonic_get_time (struct PsnipClockTimespec* res) {
|
||||
#if !defined(PSNIP_CLOCK_MONOTONIC_METHOD)
|
||||
(void) res;
|
||||
return -2;
|
||||
#elif defined(PSNIP_CLOCK_MONOTONIC_METHOD) && PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_CLOCK_GETTIME
|
||||
return psnip_clock__clock_gettime(PSNIP_CLOCK_CLOCK_GETTIME_MONOTONIC, res);
|
||||
#elif defined(PSNIP_CLOCK_MONOTONIC_METHOD) && PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_MACH_ABSOLUTE_TIME
|
||||
uint64_t nsec = mach_absolute_time();
|
||||
static mach_timebase_info_data_t tbi = { 0, };
|
||||
if (tbi.denom == 0)
|
||||
mach_timebase_info(&tbi);
|
||||
nsec *= ((uint64_t) tbi.numer) / ((uint64_t) tbi.denom);
|
||||
res->seconds = nsec / PSNIP_CLOCK_NSEC_PER_SEC;
|
||||
res->nanoseconds = nsec % PSNIP_CLOCK_NSEC_PER_SEC;
|
||||
#elif defined(PSNIP_CLOCK_MONOTONIC_METHOD) && PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_QUERYPERFORMANCECOUNTER
|
||||
LARGE_INTEGER t, f;
|
||||
if (QueryPerformanceCounter(&t) == 0)
|
||||
return -12;
|
||||
|
||||
QueryPerformanceFrequency(&f);
|
||||
res->seconds = t.QuadPart / f.QuadPart;
|
||||
res->nanoseconds = t.QuadPart % f.QuadPart;
|
||||
if (f.QuadPart > PSNIP_CLOCK_NSEC_PER_SEC)
|
||||
res->nanoseconds /= f.QuadPart / PSNIP_CLOCK_NSEC_PER_SEC;
|
||||
else
|
||||
res->nanoseconds *= PSNIP_CLOCK_NSEC_PER_SEC / f.QuadPart;
|
||||
#elif defined(PSNIP_CLOCK_MONOTONIC_METHOD) && PSNIP_CLOCK_MONOTONIC_METHOD == PSNIP_CLOCK_METHOD_GETTICKCOUNT64
|
||||
const ULONGLONG msec = GetTickCount64();
|
||||
res->seconds = msec / 1000;
|
||||
res->nanoseconds = sec % 1000;
|
||||
#else
|
||||
return -2;
|
||||
#endif
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Returns the number of ticks per second for the specified clock.
|
||||
* For example, a clock with millisecond precision would return 1000,
|
||||
* and a clock with 1 second (such as the time() function) would
|
||||
* return 1.
|
||||
*
|
||||
* If the requested clock isn't available, it will return 0.
|
||||
* Hopefully this will be rare, but if it happens to you please let us
|
||||
* know so we can work on finding a way to support your system.
|
||||
*
|
||||
* Note that different clocks on the same system often have a
|
||||
* different precisions.
|
||||
*/
|
||||
PSNIP_CLOCK__FUNCTION uint32_t
|
||||
psnip_clock_get_precision (enum PsnipClockType clock_type) {
|
||||
switch (clock_type) {
|
||||
case PSNIP_CLOCK_TYPE_MONOTONIC:
|
||||
return psnip_clock_monotonic_get_precision ();
|
||||
case PSNIP_CLOCK_TYPE_CPU:
|
||||
return psnip_clock_cpu_get_precision ();
|
||||
case PSNIP_CLOCK_TYPE_WALL:
|
||||
return psnip_clock_wall_get_precision ();
|
||||
}
|
||||
|
||||
PSNIP_CLOCK_UNREACHABLE();
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Set the provided timespec to the requested time. Returns 0 on
|
||||
* success, or a negative value on failure. */
|
||||
PSNIP_CLOCK__FUNCTION int
|
||||
psnip_clock_get_time (enum PsnipClockType clock_type, struct PsnipClockTimespec* res) {
|
||||
assert(res != NULL);
|
||||
|
||||
switch (clock_type) {
|
||||
case PSNIP_CLOCK_TYPE_MONOTONIC:
|
||||
return psnip_clock_monotonic_get_time (res);
|
||||
case PSNIP_CLOCK_TYPE_CPU:
|
||||
return psnip_clock_cpu_get_time (res);
|
||||
case PSNIP_CLOCK_TYPE_WALL:
|
||||
return psnip_clock_wall_get_time (res);
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
#endif /* !defined(PSNIP_CLOCK_H) */
|
||||
Loading…
Reference in a new issue