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# CStruct Examples
require 'windows/system_info'
require 'cstruct/win32struct'
include Windows::SystemInfo
# SYSTEM_INFO in VC6 's SDK
# typedef struct _SYSTEM_INFO {
# union {
# DWORD dwOemId; // Obsolete field...do not use
# struct {
# WORD wProcessorArchitecture;
# WORD wReserved;
# };
# };
# DWORD dwPageSize;
# LPVOID lpMinimumApplicationAddress;
# LPVOID lpMaximumApplicationAddress;
# DWORD dwActiveProcessorMask;
# DWORD dwNumberOfProcessors;
# DWORD dwProcessorType;
# DWORD dwAllocationGranularity;
# WORD wProcessorLevel;
# WORD wProcessorRevision;
# } SYSTEM_INFO, *LPSYSTEM_INFO;
# SYSTEM_INFO in Ruby
class SYSTEM_INFO < Win32Struct
union:u do
DWORD:dwOemId
struct:x do
WORD:wProcessorArchitecture
WORD:wReserved
end
end
DWORD :dwPageSize
LPVOID :lpMinimumApplicationAddress
LPVOID :lpMaximumApplicationAddress
DWORD :dwActiveProcessorMask
DWORD :dwNumberOfProcessors
DWORD :dwProcessorType
DWORD :dwAllocationGranularity
WORD :wProcessorLevel
WORD :wProcessorRevision
end
# call GetSystemInfo
sys_info = SYSTEM_INFO.new
GetSystemInfo(sys_info.__data__) # __data__ is an alias for method 'data'
#output
puts "<System Infomation>"
puts "Processor Architecture:#{sys_info.u.x.wProcessorArchitecture}" # 'u' and 'x' can not be omitted
puts "Page Size:#{sys_info.dwPageSize}"
puts "Minimum Application Address:0x#{sys_info.lpMinimumApplicationAddress.to_s 16}"
puts "Maximum Application Address:0x#{sys_info.lpMaximumApplicationAddress.to_s 16}"
puts "Active Processor Mask:#{sys_info.dwActiveProcessorMask}"
puts "Number Of Processors:#{sys_info.dwNumberOfProcessors}"
puts "Processor Type:#{sys_info.dwProcessorType}"
puts "Allocation Granularity:0x#{sys_info.dwAllocationGranularity.to_s 16}"
puts "Processor Level:#{sys_info.wProcessorLevel}"
puts "Processor Revision:#{sys_info.wProcessorRevision}"
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