79 lines
2.4 KiB
C++
79 lines
2.4 KiB
C++
/* wincap.h: Header for OS capability class.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _WINCAP_H
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#define _WINCAP_H
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struct wincaps
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{
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DWORD def_guard_pages;
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/* The bitfields must be 8 byte aligned on x86_64, otherwise the bitfield
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ops generated by gcc are off by 4 bytes. */
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struct __attribute__ ((aligned (8))) {
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unsigned is_server : 1;
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unsigned needs_count_in_si_lpres2 : 1;
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unsigned has_gaa_largeaddress_bug : 1;
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unsigned has_broken_alloc_console : 1;
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unsigned has_console_logon_sid : 1;
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unsigned has_precise_system_time : 1;
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unsigned has_microsoft_accounts : 1;
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unsigned has_processor_groups : 1;
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unsigned has_broken_prefetchvm : 1;
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unsigned has_new_pebteb_region : 1;
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unsigned has_broken_whoami : 1;
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unsigned has_unprivileged_createsymlink : 1;
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};
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};
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class wincapc
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{
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SYSTEM_INFO system_info;
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RTL_OSVERSIONINFOEXW version;
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char osnam[40];
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ULONG_PTR wow64;
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void *caps;
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public:
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void init ();
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const DWORD cpu_count () const { return system_info.dwNumberOfProcessors; }
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/* The casts to size_t make sure that the returned value has the size of
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a pointer on any system. This is important when using them for bit
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mask operations, like in roundup2. */
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const size_t page_size () const { return (size_t) system_info.dwPageSize; }
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const size_t allocation_granularity () const
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{ return (size_t) system_info.dwAllocationGranularity; }
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const char *osname () const { return osnam; }
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const bool is_wow64 () const { return !!wow64; }
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#define IMPLEMENT(cap) cap() const { return ((wincaps *) this->caps)->cap; }
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DWORD def_guard_page_size () const
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{
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return ((wincaps *) this->caps)->def_guard_pages * page_size ();
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}
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bool IMPLEMENT (is_server)
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bool IMPLEMENT (needs_count_in_si_lpres2)
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bool IMPLEMENT (has_gaa_largeaddress_bug)
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bool IMPLEMENT (has_broken_alloc_console)
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bool IMPLEMENT (has_console_logon_sid)
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bool IMPLEMENT (has_precise_system_time)
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bool IMPLEMENT (has_microsoft_accounts)
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bool IMPLEMENT (has_processor_groups)
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bool IMPLEMENT (has_broken_prefetchvm)
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bool IMPLEMENT (has_new_pebteb_region)
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bool IMPLEMENT (has_broken_whoami)
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bool IMPLEMENT (has_unprivileged_createsymlink)
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#undef IMPLEMENT
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};
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extern wincapc wincap;
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#endif /* _WINCAP_H */
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