mecca.platform.cpu source code

1 module mecca.platform.cpu;
2 
3 // Licensed under the Boost license. Full copyright information in the AUTHORS file
4 
5 import std..string;
6 import std.conv;
7 
8 version(linux):
9 
10 struct CPUInfo {
11     string[string] members;
12 
13     bool opBinaryRight(string op: "in")(string name) const {
14         return (name in members) !is null;
15     }
16     string opIndex(string name) const {
17         return members[name];
18     }
19     T getAs(T)(string name) const {
20         return to!T(members[name]);
21     }
22     string toString() const {
23         return to!string(members);
24     }
25 
26     @property int coreId() const {
27         return getAs!int("core id");
28     }
29     @property int physicalId() const {
30         return getAs!int("physical id");
31     }
32     @property string[] flags() const {
33         return members["flags"].split();
34     }
35 }
36 
37 private __gshared CPUInfo[int] _cpus;
38 
39 private void loadCPUInfos() {
40     import std.file: readText;
41     auto lines = readText("/proc/cpuinfo").splitLines();
42 
43     CPUInfo processor;
44 
45     while(lines.length > 0) {
46         auto line = lines[0].strip();
47         lines = lines[1 .. $];
48         if (line.length == 0) {
49             _cpus[processor.getAs!int("processor")] = processor;
50             processor = CPUInfo.init;
51             continue;
52         }
53 
54         auto colon = line.indexOf(":");
55         auto k = line[0 .. colon].strip();
56         auto v = line[colon+1 .. $].strip();
57         processor.members[k] = v;
58     }
59 }
60 
61 @property const(CPUInfo[int]) cpuInfos() {
62     if (_cpus.length == 0) {
63         loadCPUInfos();
64     }
65     return _cpus;
66 }
67 
68 unittest {
69     import std.stdio;
70     import std.algorithm;
71 
72     assert (cpuInfos.length > 0);
73     assert (cpuInfos[0].flags.canFind("sse"));
74 }
75