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
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
local uv = vim.uv
local MsgpackRpcStream = require('test.client.msgpack_rpc_stream')
--- @class test.Session
--- @field private _pending_messages string[]
--- @field private _msgpack_rpc_stream test.MsgpackRpcStream
--- @field private _prepare uv.uv_prepare_t
--- @field private _timer uv.uv_timer_t
--- @field private _is_running boolean
local Session = {}
Session.__index = Session
if package.loaded['jit'] then
-- luajit pcall is already coroutine safe
Session.safe_pcall = pcall
else
Session.safe_pcall = require 'coxpcall'.pcall
end
local function resume(co, ...)
local status, result = coroutine.resume(co, ...)
if coroutine.status(co) == 'dead' then
if not status then
error(result)
end
return
end
assert(coroutine.status(co) == 'suspended')
result(co)
end
local function coroutine_exec(func, ...)
local args = { ... }
local on_complete --- @type function?
if #args > 0 and type(args[#args]) == 'function' then
-- completion callback
on_complete = table.remove(args)
end
resume(coroutine.create(function()
local status, result, flag = Session.safe_pcall(func, unpack(args))
if on_complete then
coroutine.yield(function()
-- run the completion callback on the main thread
on_complete(status, result, flag)
end)
end
end))
end
function Session.new(stream)
return setmetatable({
_msgpack_rpc_stream = MsgpackRpcStream.new(stream),
_pending_messages = {},
_prepare = uv.new_prepare(),
_timer = uv.new_timer(),
_is_running = false,
}, Session)
end
--- @param timeout integer?
--- @return string?
function Session:next_message(timeout)
local function on_request(method, args, response)
table.insert(self._pending_messages, { 'request', method, args, response })
uv.stop()
end
local function on_notification(method, args)
table.insert(self._pending_messages, { 'notification', method, args })
uv.stop()
end
if self._is_running then
error('Event loop already running')
end
if #self._pending_messages > 0 then
return table.remove(self._pending_messages, 1)
end
-- if closed, only return pending messages
if self.closed then
return nil
end
self:_run(on_request, on_notification, timeout)
return table.remove(self._pending_messages, 1)
end
function Session:notify(method, ...)
self._msgpack_rpc_stream:write(method, { ... })
end
--- @param method string
--- @param ... any
--- @return boolean
--- @return table
function Session:request(method, ...)
local args = { ... }
local err, result
if self._is_running then
err, result = self:_yielding_request(method, args)
else
err, result = self:_blocking_request(method, args)
end
if err then
return false, err
end
return true, result
end
function Session:run(request_cb, notification_cb, setup_cb, timeout)
local function on_request(method, args, response)
coroutine_exec(request_cb, method, args, function(status, result, flag)
if status then
response:send(result, flag)
else
response:send(result, true)
end
end)
end
local function on_notification(method, args)
coroutine_exec(notification_cb, method, args)
end
self._is_running = true
if setup_cb then
coroutine_exec(setup_cb)
end
while #self._pending_messages > 0 do
local msg = table.remove(self._pending_messages, 1)
if msg[1] == 'request' then
on_request(msg[2], msg[3], msg[4])
else
on_notification(msg[2], msg[3])
end
end
self:_run(on_request, on_notification, timeout)
self._is_running = false
end
function Session:stop()
uv.stop()
end
function Session:close(signal)
if not self._timer:is_closing() then
self._timer:close()
end
if not self._prepare:is_closing() then
self._prepare:close()
end
self._msgpack_rpc_stream:close(signal)
self.closed = true
end
function Session:_yielding_request(method, args)
return coroutine.yield(function(co)
self._msgpack_rpc_stream:write(method, args, function(err, result)
resume(co, err, result)
end)
end)
end
function Session:_blocking_request(method, args)
local err, result
local function on_request(method_, args_, response)
table.insert(self._pending_messages, { 'request', method_, args_, response })
end
local function on_notification(method_, args_)
table.insert(self._pending_messages, { 'notification', method_, args_ })
end
self._msgpack_rpc_stream:write(method, args, function(e, r)
err = e
result = r
uv.stop()
end)
self:_run(on_request, on_notification)
return (err or self.eof_err), result
end
function Session:_run(request_cb, notification_cb, timeout)
if type(timeout) == 'number' then
self._prepare:start(function()
self._timer:start(timeout, 0, function()
uv.stop()
end)
self._prepare:stop()
end)
end
self._msgpack_rpc_stream:read_start(request_cb, notification_cb, function()
uv.stop()
self.eof_err = { 1, 'EOF was received from Nvim. Likely the Nvim process crashed.' }
end)
uv.run()
self._prepare:stop()
self._timer:stop()
self._msgpack_rpc_stream:read_stop()
end
return Session
|
