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Implement POSIX_MADV_WILLNEED/POSIX_MADV_DONTNEED for newer OSes

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* autoload.cc (DiscardVirtualMemory): Import.
        (PrefetchVirtualMemory): Import.
        * mmap.cc (posix_madvise): Actually implement POSIX_MADV_WILLNEED
        utilizing PrefetchVirtualMemory and POSIX_MADV_DONTNEED utilizing
        DiscardVirtualMemory on systems supporting them.
        * wincap.h (wincaps::has_broken_prefetchvm): New element.
        * wincap.cc: Implement above element throughout.
        (wincapc::init): Make sure has_broken_prefetchvm is only true on
        W10 under WOW64.
        * include/cygwin/version.h (CYGWIN_VERSION_DLL_MAJOR): Bump to 2003.
        (CYGWIN_VERSION_API_MINOR): Reset to 0.

        * new-features.xml (ov-new2.3): New section, document posix_madvise
        POSIX_MADV_WILLNEED/POSIX_MADV_DONTNEED change.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen
2015-08-27 13:34:10 +02:00
parent e6d9af11f1
commit 35d5d87540
9 changed files with 149 additions and 21 deletions
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2
winsup/cygwin/autoload.cc
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@ -570,12 +570,14 @@ LoadDLLfunc (GetUdpTable, 12, iphlpapi)
LoadDLLfuncEx (CancelSynchronousIo, 4, kernel32, 1)
LoadDLLfunc (CreateSymbolicLinkW, 12, kernel32)
LoadDLLfuncEx2 (DiscardVirtualMemory, 8, kernel32, 1, 127)
LoadDLLfuncEx (GetLogicalProcessorInformationEx, 12, kernel32, 1)
LoadDLLfuncEx (GetNamedPipeClientProcessId, 8, kernel32, 1)
LoadDLLfunc (GetSystemTimePreciseAsFileTime, 4, kernel32)
LoadDLLfuncEx (IdnToAscii, 20, kernel32, 1)
LoadDLLfuncEx (IdnToUnicode, 20, kernel32, 1)
LoadDLLfunc (LocaleNameToLCID, 8, kernel32)
LoadDLLfuncEx (PrefetchVirtualMemory, 16, kernel32, 1)
LoadDLLfunc (SetThreadGroupAffinity, 12, kernel32)
LoadDLLfunc (SetThreadStackGuarantee, 4, kernel32)