From bb209f56147878ac420e4d1915e989bb11d272a2 Mon Sep 17 00:00:00 2001 From: Vijay Bellur Date: Thu, 15 Jul 2010 00:33:03 +0000 Subject: Bring in uuid to contrib Signed-off-by: Vijay Bellur Signed-off-by: Anand V. Avati BUG: 971 (dynamic volume management) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=971 --- contrib/uuid/gen_uuid_nt.c | 92 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+) create mode 100644 contrib/uuid/gen_uuid_nt.c (limited to 'contrib/uuid/gen_uuid_nt.c') diff --git a/contrib/uuid/gen_uuid_nt.c b/contrib/uuid/gen_uuid_nt.c new file mode 100644 index 00000000..aa44bfd3 --- /dev/null +++ b/contrib/uuid/gen_uuid_nt.c @@ -0,0 +1,92 @@ +/* + * gen_uuid_nt.c -- Use NT api to generate uuid + * + * Written by Andrey Shedel (andreys@ns.cr.cyco.com) + */ + + +#include "uuidP.h" + +#pragma warning(push,4) + +#pragma comment(lib, "ntdll.lib") + +// +// Here is a nice example why it's not a good idea +// to use native API in ordinary applications. +// Number of parameters in function below was changed from 3 to 4 +// for NT5. +// +// +// NTSYSAPI +// NTSTATUS +// NTAPI +// NtAllocateUuids( +// OUT PULONG p1, +// OUT PULONG p2, +// OUT PULONG p3, +// OUT PUCHAR Seed // 6 bytes +// ); +// +// + +unsigned long +__stdcall +NtAllocateUuids( + void* p1, // 8 bytes + void* p2, // 4 bytes + void* p3 // 4 bytes + ); + +typedef +unsigned long +(__stdcall* +NtAllocateUuids_2000)( + void* p1, // 8 bytes + void* p2, // 4 bytes + void* p3, // 4 bytes + void* seed // 6 bytes + ); + + + +// +// Nice, but instead of including ntddk.h ot winnt.h +// I should define it here because they MISSED __stdcall in those headers. +// + +__declspec(dllimport) +struct _TEB* +__stdcall +NtCurrentTeb(void); + + +// +// The only way to get version information from the system is to examine +// one stored in PEB. But it's pretty dangerouse because this value could +// be altered in image header. +// + +static +int +Nt5(void) +{ + //return NtCuttentTeb()->Peb->OSMajorVersion >= 5; + return (int)*(int*)((char*)(int)(*(int*)((char*)NtCurrentTeb() + 0x30)) + 0xA4) >= 5; +} + + + + +void uuid_generate(uuid_t out) +{ + if(Nt5()) + { + unsigned char seed[6]; + ((NtAllocateUuids_2000)NtAllocateUuids)(out, ((char*)out)+8, ((char*)out)+12, &seed[0] ); + } + else + { + NtAllocateUuids(out, ((char*)out)+8, ((char*)out)+12); + } +} -- cgit