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libipc-old/zig-impl/apps/pongd.zig

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Zig

const std = @import("std");
const net = std.net;
const fmt = std.fmt;
const os = std.os;
const ipc = @import("ipc");
const hexdump = ipc.hexdump;
const Message = ipc.Message;
const util = ipc.util;
// Import send_fd this way in order to produce docs for exchange-fd functions.
const exchange_fd = ipc.exchangefd;
const send_fd = exchange_fd.send_fd;
const builtin = @import("builtin");
const native_os = builtin.target.os.tag;
const print = std.debug.print;
const testing = std.testing;
fn create_service() !void {
const config = .{.safety = true};
var gpa = std.heap.GeneralPurposeAllocator(config){};
defer _ = gpa.deinit();
const allocator = gpa.allocator();
var ctx = try ipc.Context.init(allocator);
defer ctx.deinit(); // There. Can't leak. Isn't Zig wonderful?
// SERVER SIDE: creating a service.
_ = try ctx.server_init("pong");
// signal handler, to quit when asked
const S = struct {
var should_quit: bool = false;
fn handler(sig: i32, info: *const os.siginfo_t, _: ?*const anyopaque) callconv(.C) void {
print ("A signal has been received: {}\n", .{sig});
// Check that we received the correct signal.
switch (native_os) {
.netbsd => {
if (sig != os.SIG.HUP or sig != info.info.signo)
return;
},
else => {
if (sig != os.SIG.HUP and sig != info.signo)
return;
},
}
should_quit = true;
}
};
var sa = os.Sigaction{
.handler = .{ .sigaction = &S.handler },
.mask = os.empty_sigset, // Do not mask any signal.
.flags = os.SA.SIGINFO,
};
// Quit on SIGHUP (kill -1).
try os.sigaction(os.SIG.HUP, &sa, null);
var some_event: ipc.Event = undefined;
ctx.timer = 20000; // 2 seconds
var count: u32 = 0;
while(! S.should_quit) {
some_event = try ctx.wait_event();
switch (some_event.t) {
.TIMER => {
print("\rTimer! ({})", .{count});
count += 1;
},
.CONNECTION => {
print("New connection: {} so far!\n", .{ctx.pollfd.items.len});
},
.DISCONNECTION => {
print("User {} disconnected, {} remainaing.\n"
, .{some_event.origin, ctx.pollfd.items.len});
},
.MESSAGE_RX => {
if (some_event.m) |m| {
print("New message ({} bytes)\n", .{m.payload.len});
util.print_message ("RECEIVED MESSAGE", m);
print("Echoing it...\n", .{});
try ctx.schedule(m);
}
else {
print("Error while receiving new message.\n", .{});
print("Ignoring...\n", .{});
}
},
.MESSAGE_TX => {
print("Message sent.\n", .{});
},
else => {
print("Error: unexpected event: {}\n", .{some_event});
print("Let's suicide.\n", .{});
break;
},
}
}
print("Goodbye\n", .{});
}
pub fn main() !u8 {
try create_service();
return 0;
}