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const ThreadPool = @import("thread_pool");
pub const Batch = ThreadPool.Batch;
pub const Task = ThreadPool.Task;
const std = @import("std");
const AsyncIO = @import("io");
const Output = @import("./global.zig").Output;
const IdentityContext = @import("./identity_context.zig").IdentityContext;
const HTTP = @import("./http_client_async.zig");
const NetworkThread = @This();
/// Single-thread in this pool
pool: ThreadPool,
pub var global: NetworkThread = undefined;
pub var global_loaded: std.atomic.Atomic(u32) = std.atomic.Atomic(u32).init(0);
const CachedAddressList = struct {
address_list: *std.net.AddressList,
expire_after: u64,
key: u64,
index: ?u32 = null,
invalidated: bool = false,
pub fn hash(name: []const u8, port: u16) u64 {
var hasher = std.hash.Wyhash.init(0);
hasher.update(name);
hasher.update(":");
hasher.update(std.mem.asBytes(&port));
return hasher.final();
}
pub fn init(key: u64, address_list: *std.net.AddressList, now: u64) CachedAddressList {
return CachedAddressList{
.address_list = address_list,
.expire_after = now + std.time.ms_per_hour,
.key = key,
};
}
pub fn invalidate(this: *CachedAddressList) void {
if (!this.invalidated) {
this.invalidated = true;
this.address_list.deinit();
}
_ = address_list_cached.remove(this.key);
}
};
pub const AddressListCache = std.HashMap(u64, CachedAddressList, IdentityContext(u64), 80);
pub var address_list_cached: AddressListCache = undefined;
pub fn getAddressList(allocator: std.mem.Allocator, name: []const u8, port: u16) !*CachedAddressList {
const hash = CachedAddressList.hash(name, port);
const now = @intCast(u64, @maximum(0, std.time.milliTimestamp()));
if (address_list_cached.getPtr(hash)) |cached| {
if (cached.expire_after > now) {
return cached;
}
cached.address_list.deinit();
}
const address_list = try std.net.getAddressList(allocator, name, port);
var entry = try address_list_cached.getOrPut(hash);
entry.value_ptr.* = CachedAddressList.init(hash, address_list, now);
return entry.value_ptr;
}
pub fn init() !void {
if ((global_loaded.swap(1, .Monotonic)) == 1) return;
AsyncIO.global_loaded = true;
global = NetworkThread{
.pool = ThreadPool.init(.{ .max_threads = 1, .stack_size = 64 * 1024 * 1024 }),
};
global.pool.on_thread_spawn = HTTP.onThreadStart;
}
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