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openbsd: proper implementation for Thread.cpuCount()

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This commit is contained in:
Sébastien Marie 2020-11-10 05:25:59 +00:00
parent 20b19d0092
commit 8784c7b581
2 changed files with 13 additions and 0 deletions
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3
lib/std/os/bits/openbsd.zig
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@ -292,10 +292,13 @@ pub const AI_ADDRCONFIG = 64;
pub const CTL_KERN = 1;
pub const CTL_DEBUG = 5;
pub const CTL_HW = 6;
pub const KERN_PROC_ARGS = 55;
pub const KERN_PROC_ARGV = 1;
pub const HW_NCPUONLINE = 25;
pub const PATH_MAX = 1024;
pub const STDIN_FILENO = 0;

10
lib/std/thread.zig
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@ -491,6 +491,16 @@ pub const Thread = struct {
if (std.Target.current.os.tag == .windows) {
return os.windows.peb().NumberOfProcessors;
}
if (std.Target.current.os.tag == .openbsd) {
var count: c_int = undefined;
var count_size: usize = @sizeOf(c_int);
const mib = [_]c_int{ os.CTL_HW, os.HW_NCPUONLINE };
os.sysctl(&mib, &count, &count_size, null, 0) catch |err| switch (err) {
error.NameTooLong, error.UnknownName => unreachable,
else => |e| return e,
};
return @intCast(usize, count);
}
var count: c_int = undefined;
var count_len: usize = @sizeOf(c_int);
const name = if (comptime std.Target.current.isDarwin()) "hw.logicalcpu" else "hw.ncpu";