author | Edouard Tisserant <edouard.tisserant@gmail.com> |
Sat, 20 May 2023 00:36:41 +0200 | |
changeset 3810 | eafb8f000584 |
parent 3750 | f62625418bff |
permissions | -rw-r--r-- |
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# vi: set ft=python sw=4 ts=4 et: |
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'''monotonic time for Python 2 and 3, on Linux, FreeBSD, Mac OS X, and Windows. |
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Copyright 2010, 2011, 2017 Gavin Beatty <gavinbeatty@gmail.com> |
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Permission is hereby granted, free of charge, to any person obtaining a copy of |
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this software and associated documentation files (the "Software"), to deal in |
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the Software without restriction, including without limitation the rights to |
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies |
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of the Software, and to permit persons to whom the Software is furnished to do |
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so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be included in all |
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copies or substantial portions of the Software. |
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|
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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SOFTWARE. |
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''' |
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automated conversion using 2to3-3.9 tool
GP Orcullo <kinsamanka@gmail.com>
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__author__ = 'Gavin Beatty <gavinbeatty@gmail.com>' |
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__version__ = '2.1.0.dev0' |
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__date__ = '2017-05-28' |
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__all__ = ['monotonic'] |
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import contextlib |
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import ctypes |
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import errno |
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import os |
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import platform |
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import sys |
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import time |
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_machine64 = (platform.machine(), sys.maxsize > 2**32) |
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class _NS(): |
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pass |
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class _mach_timespec(ctypes.Structure): |
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_fields_ = [('tv_sec', ctypes.c_uint), ('tv_nsec', ctypes.c_int)] |
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class _posix_timespec(ctypes.Structure): |
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_fields_ = [('tv_sec', ctypes.c_long), ('tv_nsec', ctypes.c_long)] |
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def _timespec_to_seconds(ts): |
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return float(ts.tv_sec) + float(ts.tv_nsec) * 1e-9 |
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def _get_ctypes_libmacho_macho_functions(): |
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libmacho = ctypes.CDLL('/usr/lib/system/libmacho.dylib', use_errno=True) |
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macho = _NS() |
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macho.get_host = libmacho.mach_host_self |
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macho.get_host.argtypes = [] |
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macho.get_host.restype = ctypes.c_uint |
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macho.get_clock = libmacho.host_get_clock_service |
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macho.get_clock.argtypes = [ctypes.c_uint, |
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ctypes.c_int, |
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ctypes.POINTER(ctypes.c_uint) |
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] |
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macho.get_time = libmacho.clock_get_time |
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macho.get_time.argtypes = [ctypes.c_uint, ctypes.POINTER(_mach_timespec)] |
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macho.deallocate = libmacho.mach_port_deallocate |
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macho.deallocate.argtypes = [ctypes.c_uint, ctypes.c_uint] |
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return libmacho, macho |
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def _get_ctypes_clock_gettime(library): |
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clock_gettime = ctypes.CDLL(library, use_errno=True).clock_gettime |
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clock_gettime.argtypes = [ctypes.c_int, ctypes.POINTER(_posix_timespec)] |
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return clock_gettime |
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def _call_ctypes_clock_gettime(clock_gettime, clockid): |
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timespec = _posix_timespec() |
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ret = clock_gettime(clockid, ctypes.pointer(timespec)) |
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if int(ret) != 0: |
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errno_ = ctypes.get_errno() |
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raise OSError(errno_, os.strerror(errno_)) |
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return timespec |
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_py_monotonic = getattr(time, 'monotonic', None) |
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if _py_monotonic is not None: |
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monotonic = _py_monotonic |
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elif sys.platform.startswith('linux'): |
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_clock_gettime = _get_ctypes_clock_gettime('librt.so.1') |
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def monotonic(): |
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clockid = ctypes.c_int(1) |
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timespec = _call_ctypes_clock_gettime(_clock_gettime, clockid) |
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return _timespec_to_seconds(timespec) |
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elif sys.platform.startswith('freebsd'): |
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_clock_gettime = _get_ctypes_clock_gettime('libc.so') |
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def monotonic(): |
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clockid = ctypes.c_int(4) |
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timespec = _call_ctypes_clock_gettime(_clock_gettime, clockid) |
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return _timespec_to_seconds(timespec) |
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elif sys.platform.startswith('darwin') and _machine64 == ('x86_64', True): |
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_libmacho, _macho = _get_ctypes_libmacho_macho_functions() |
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113 |
|
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114 |
@contextlib.contextmanager |
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115 |
def _deallocate(task, port): |
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116 |
try: |
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117 |
yield |
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118 |
finally: |
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119 |
if int(_macho.deallocate(task, port)) == 0: |
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120 |
return |
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121 |
errno_ = ctypes.get_errno() |
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122 |
raise OSError(errno_, os.strerror(errno_)) |
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123 |
|
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124 |
def monotonic(): |
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125 |
task = ctypes.c_uint.in_dll(_libmacho, 'mach_task_self_') |
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126 |
host = _macho.get_host() |
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127 |
with _deallocate(task, host): |
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128 |
clock = ctypes.c_uint(0) |
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129 |
clockid = ctypes.c_int(0) |
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130 |
ret = _macho.get_clock(host, clockid, ctypes.pointer(clock)) |
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131 |
if int(ret) != 0: |
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132 |
errno_ = ctypes.get_errno() |
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133 |
raise OSError(errno_, os.strerror(errno_)) |
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134 |
with _deallocate(task, clock): |
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135 |
timespec = _mach_timespec() |
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136 |
ret = _macho.get_time(clock, ctypes.pointer(timespec)) |
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137 |
if int(ret) != 0: |
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138 |
errno_ = ctypes.get_errno() |
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139 |
raise OSError(errno_, os.strerror(errno_)) |
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140 |
return _timespec_to_seconds(timespec) |
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141 |
elif sys.platform.startswith('win32'): |
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142 |
_GetTickCount = getattr(ctypes.windll.kernel32, 'GetTickCount64', None) |
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143 |
|
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144 |
if _GetTickCount is not None: |
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145 |
_GetTickCount.restype = ctypes.c_uint64 |
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146 |
else: |
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147 |
_GetTickCount = ctypes.windll.kernel32.GetTickCount |
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148 |
_GetTickCount.restype = ctypes.c_uint32 |
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149 |
|
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150 |
def monotonic(): |
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151 |
return float(_GetTickCount()) * 1e-3 |
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152 |
else: |
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153 |
def monotonic(): |
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154 |
msg = 'monotonic not supported on your platform' |
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155 |
raise OSError(errno.ENOSYS, msg) |
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156 |
|
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157 |
|
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158 |
if __name__ == '__main__': |
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159 |
print(monotonic()) |