SharedArray not compatible with Windows OS

[yihuajack]

The package SharedArray introduced since tag 0.5.0 only works on POSIX systems (Linux, BSD, Mac OS) but not on Windows OS, which spoils OpenPCDet's compatibility with Windows. This issue originated from #681, which causes setup failure after installing OpenPCDet:

Installed d:\resources\openpcdet Processing dependencies for pcdet==0.5.2+fe62793 Searching for SharedArray Reading https://pypi.org/simple/SharedArray/ Downloading https://files.pythonhosted.org/packages/74/73/1f66da2d3c074a00aa38bbb225870e7d45fe52d0bf50985773939dd692fd/SharedArray-3.2.1.tar.gz#sha256=ae7bba4f0ae33e209bbe58e5688d709a707b0390f3160e63fe5be8908b8e3902 Best match: SharedArray 3.2.1 Processing SharedArray-3.2.1.tar.gz Writing C:\Users\Yihua\AppData\Local\Temp\easy_install-xgq2twh6\SharedArray-3.2.1\setup.cfg Running SharedArray-3.2.1\setup.py -q bdist_egg --dist-dir C:\Users\Yihua\AppData\Local\Temp\easy_install-xgq2twh6\SharedArray-3.2.1\egg-dist-tmp-2dutib6o map_owner.c .\src\map_owner.c(19): fatal error C1083: cannot open include file: “sys/mman.h”: No such file or directory error: Setup script exited with error: command 'E:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Tools\MSVC\14.31.31103\bin\HostX64\x64\cl.exe' failed with exit code 2