SharedMemoryImpl x64 size error

[trublemaker]

i use SharedMemory with x64,
while i set size > 4G , then error,
std::size_t size = 1024LL * 1024 * 1024 * 4;
SharedMemory mem("MySharedMemory", size, SharedMemory::AM_WRITE);

and i find the define of _size is DWORD, while size_t is
#ifdef _WIN64
typedef unsigned __int64 size_t;
....
and _size(static_cast(size)) may lose high

[trublemaker]

and
_memHandle = CreateFileMappingW(INVALID_HANDLE_VALUE, NULL, _mode, 0, _size, utf16name.c_str());

dwMaximumSizeHigh always set 0, and it should be _size>>32

[github-actions]

This issue is stale because it has been open for 365 days with no activity.

[github-actions]

This issue was closed because it has been inactive for 60 days since being marked as stale.

[Spaky]

Hey @aleks-f,
i created an improvement that allows SharedMemory greater than 4GB on x64 for win32.
Currently the win32 jobs on GitHub are failing because the paging file is too small,
but on my local machine the new test is successful.

Do you think it is okay, when i create a PR for this issue?

[github-actions]

This issue is stale because it has been open for 365 days with no activity.

[pavledragisic]

@aleks-f This commit df656fc ended up here by mistake. It was supposed to go to the issue 2978

[aleks-f]

@aleks-f This commit df656fc ended up here by mistake. It was supposed to go to the issue 2978

@pavledragisic you should --amend it