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async: refacto with comptime generation

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This commit is contained in:
Pierre Tachoire
2024-01-30 16:59:00 +01:00
parent c200f60d7d
commit 2fa66f93fd
4 changed files with 90 additions and 97 deletions
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65
src/async/stream.zig
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@@ -4,65 +4,17 @@ const os = std.os;
const io = std.io;
const assert = std.debug.assert;
const Loop = @import("jsruntime").Loop;
const WriteCmd = struct {
const Self = @This();
stream: Stream,
done: bool = false,
res: usize = undefined,
err: ?anyerror = null,
fn run(self: *Self, buffer: []const u8) void {
self.stream.loop.send(*Self, self, callback, self.stream.handle, buffer);
}
fn callback(self: *Self, err: ?anyerror, res: usize) void {
self.res = res;
self.err = err;
self.done = true;
}
fn wait(self: *Self) !usize {
while (!self.done) try self.stream.loop.tick();
if (self.err) |err| return err;
return self.res;
}
};
const ReadCmd = struct {
const Self = @This();
stream: Stream,
done: bool = false,
res: usize = undefined,
err: ?anyerror = null,
fn run(self: *Self, buffer: []u8) void {
self.stream.loop.receive(*Self, self, callback, self.stream.handle, buffer);
}
fn callback(self: *Self, _: []const u8, err: ?anyerror, res: usize) void {
self.res = res;
self.err = err;
self.done = true;
}
fn wait(self: *Self) !usize {
while (!self.done) try self.stream.loop.tick();
if (self.err) |err| return err;
return self.res;
}
};
const tcp = @import("tcp.zig");
pub const Stream = struct {
loop: *Loop,
alloc: std.mem.Allocator,
conn: *tcp.Conn,
handle: std.os.socket_t,
pub fn close(self: Stream) void {
os.closeSocket(self.handle);
self.alloc.destroy(self.conn);
}
pub const ReadError = os.ReadError;
@@ -80,9 +32,7 @@ pub const Stream = struct {
}
pub fn read(self: Stream, buffer: []u8) ReadError!usize {
var cmd = ReadCmd{ .stream = self };
cmd.run(buffer);
return cmd.wait() catch |err| switch (err) {
return self.conn.receive(self.handle, buffer) catch |err| switch (err) {
else => return error.Unexpected,
};
}
@@ -118,10 +68,7 @@ pub const Stream = struct {
/// file system thread instead of non-blocking. It needs to be reworked to properly
/// use non-blocking I/O.
pub fn write(self: Stream, buffer: []const u8) WriteError!usize {
var cmd = WriteCmd{ .stream = self };
cmd.run(buffer);
return cmd.wait() catch |err| switch (err) {
return self.conn.send(self.handle, buffer) catch |err| switch (err) {
error.AccessDenied => error.AccessDenied,
error.WouldBlock => error.WouldBlock,
error.ConnectionResetByPeer => error.ConnectionResetByPeer,