1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
//! Kata (process) control
const sys = @import("sys");
const ERROR_RESULT: u64 = @bitCast(@as(i64, -1));
pub const Error = error{
SpawnFailed,
WaitFailed,
};
pub fn yield() void {
_ = sys.syscall(.yield, .{});
}
pub fn exit(code: u64) noreturn {
_ = sys.syscall(.exit, .{code});
unreachable;
}
pub fn spawn(location: []const u8) Error!u32 {
const result = sys.syscall(.spawn, .{ @intFromPtr(location.ptr), location.len, @as(u64, 0), @as(u64, 0) });
if (result == ERROR_RESULT) {
return Error.SpawnFailed;
}
return @truncate(result);
}
pub fn spawnWithParams(location: []const u8, params: [][*:0]const u8) Error!u32 {
const result = sys.syscall(.spawn, .{ @intFromPtr(location.ptr), location.len, @intFromPtr(params.ptr), params.len });
if (result == ERROR_RESULT) {
return Error.SpawnFailed;
}
return @truncate(result);
}
pub fn wait(pid: u32) Error!u64 {
while (true) {
const result = sys.syscall(.wait, .{pid});
if (result != ERROR_RESULT) {
return result;
}
yield();
}
}
|
