1/*
2 This file is part of Mtproto-proxy Library.
3
4 Mtproto-proxy Library is free software: you can redistribute it and/or modify
5 it under the terms of the GNU Lesser General Public License as published by
6 the Free Software Foundation, either version 2 of the License, or
7 (at your option) any later version.
8
9 Mtproto-proxy Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public License
15 along with Mtproto-proxy Library. If not, see <http://www.gnu.org/licenses/>.
16
17 Copyright 2014 Telegram Messenger Inc
18 2014 Anton Maydell
19*/
20
21#include <assert.h>
22#include <cpuid.h>
23
24#include "cpuid.h"
25
26
27#define CPUID_MAGIC 0x280147b8
28
29kdb_cpuid_t *kdb_cpuid (void) {
30 static kdb_cpuid_t cached = { .magic = 0 };
31 if (cached.magic) {
32 assert (cached.magic == CPUID_MAGIC);
33 return &cached;
34 }
35
36 unsigned int a;
37 assert(
38 __get_cpuid(1,
39 &a,
40 (unsigned int*) &cached.ebx,
41 (unsigned int*) &cached.ecx,
42 (unsigned int*) &cached.edx
43 ) != 0
44 );
45
46 cached.magic = CPUID_MAGIC;
47 return &cached;
48}
49