[MinGW-notify] [ mingw-Bugs-3490471 ] SYSTEM_LOGICAL_PROCESSOR_INFORMATION et al missing

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Bugs item #3490471, was opened at 2012-02-21 18:25
Message generated for change (Comment added) made by earnie
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>Category: WSL (Windows System Libraries)
>Group: Feature in WSL 4.1
Status: Open
>Resolution: Later
Priority: 5
Private: No
Submitted By: Salsaman (gfinch)
Assigned to: Earnie Boyd (earnie)
Summary: SYSTEM_LOGICAL_PROCESSOR_INFORMATION et al  missing

Initial Comment:
Attempting to compile the code here: http://msdn.microsoft.com/en-us/library/windows/desktop/ms683194%28v=vs.85%29.aspx 
produces a number of errors:

error: unknown type name 'PSYSTEM_LOGICAL_PROCESSOR_INFORMATION'
error: 'SYSTEM_LOGICAL_PROCESSOR_INFORMATION' undeclared
error: unknown type name 'PCACHE_DESCRIPTOR'
error: 'RelationNumaNode' undeclared
error: 'RelationProcessorCore' undeclared
error: 'RelationCache' undeclared
error: 'RelationProcessorPackage' undeclared


at the very least it would be nice to have (P)SYSTEM_LOGICAL_PROCESSOR_INFORMATION and RelationProcessorCore in order to be able to count the number of processors available.

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>Comment By: Earnie Boyd (earnie)
Date: 2012-10-23 09:44

Message:
I need to study the effects of the requirements before including these.

Requirements
Minimum supported client
Windows Vista, Windows XP Professional x64 Edition
Minimum supported server
Windows Server 2003

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Comment By: Anton Lavrentiev (alavrentiev)
Date: 2012-06-13 10:01

Message:
At least for GetSystemLogicalProcessInformation, MS SDK does not
conditionalize
this with any kind of WINVER control (in winbase.h, probably because it was
documented to be a dynamically linked
API, requiring GetProcAddress() in the past):

WINBASEAPI
BOOL
WINAPI
GetLogicalProcessorInformation(
    __out_bcount_part_opt(*ReturnedLength, *ReturnedLength)
PSYSTEM_LOGICAL_PROCESSOR_INFORMATION Buffer,
    __inout PDWORD ReturnedLength
    );

The Ex version is only prototyped when WINVER >= 0x0601 (not shown here).

The structures are also unconditionally defined in winnt.h:

typedef enum _LOGICAL_PROCESSOR_RELATIONSHIP {
    RelationProcessorCore,
    RelationNumaNode,
    RelationCache,
    RelationProcessorPackage,
    RelationGroup,
    RelationAll = 0xffff
} LOGICAL_PROCESSOR_RELATIONSHIP;

#define LTP_PC_SMT 0x1

typedef enum _PROCESSOR_CACHE_TYPE {
    CacheUnified,
    CacheInstruction,
    CacheData,
    CacheTrace
} PROCESSOR_CACHE_TYPE;

#define CACHE_FULLY_ASSOCIATIVE 0xFF

typedef struct _CACHE_DESCRIPTOR {
    BYTE   Level;
    BYTE   Associativity;
    WORD   LineSize;
    DWORD  Size;
    PROCESSOR_CACHE_TYPE Type;
} CACHE_DESCRIPTOR, *PCACHE_DESCRIPTOR;

typedef struct _SYSTEM_LOGICAL_PROCESSOR_INFORMATION {
    ULONG_PTR   ProcessorMask;
    LOGICAL_PROCESSOR_RELATIONSHIP Relationship;
    union {
        struct {
            BYTE  Flags;
        } ProcessorCore;
        struct {
            DWORD NodeNumber;
        } NumaNode;
        CACHE_DESCRIPTOR Cache;
        ULONGLONG  Reserved[2];
    } DUMMYUNIONNAME;
} SYSTEM_LOGICAL_PROCESSOR_INFORMATION,
*PSYSTEM_LOGICAL_PROCESSOR_INFORMATION;

The Ex version requires more data structures (I'm not including these
here).

I checked the non-Ex API, and it works just as documented, so including at
least
that into win32api support would already help a great deal (so that I can
drop
the local declarations of what supposed to be included in the standard
headers).

Thanks!

AL


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Comment By: Earnie Boyd (earnie)
Date: 2012-02-22 04:29

Message:
These are absent because no one has supplied a patch.  As new API become
available someone who is interested in needing the new functionality will
supply a patch to have it included in the appropriate header guarded by the
correct versions of windows the API appeared.  Some of what you are using
came about for Vista, some came about in Windows 7.  If no patch is forth
coming eventually, Chris will take care of the addition, but based on his
time.

----------------------------------------------------------------------

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