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| 1 | +local a = require "async" |
| 2 | +local co = coroutine |
| 3 | +local uv = vim.loop |
| 4 | + |
| 5 | + |
| 6 | +--#################### ########### #################### |
| 7 | +--#################### Sync Region #################### |
| 8 | +--#################### ########### #################### |
| 9 | + |
| 10 | + |
| 11 | +-- sync version of pong |
| 12 | +local pong = function (thread) |
| 13 | + local nxt = nil |
| 14 | + nxt = function (cont, ...) |
| 15 | + if not cont |
| 16 | + then return ... |
| 17 | + else return nxt(co.resume(thread), ...) |
| 18 | + end |
| 19 | + end |
| 20 | + return nxt(co.resume(thread)) |
| 21 | +end |
| 22 | + |
| 23 | + |
| 24 | +local sync_example = function () |
| 25 | + |
| 26 | + local thread = co.create(function () |
| 27 | + local x = co.yield(1) |
| 28 | + print(x) |
| 29 | + local y, z = co.yield(2, 3) |
| 30 | + print(y) |
| 31 | + return 4, 5 |
| 32 | + end) |
| 33 | + |
| 34 | + local w, t = pong(thread) |
| 35 | + print(w, t) |
| 36 | +end |
| 37 | + |
| 38 | + |
| 39 | +--#################### ############ #################### |
| 40 | +--#################### Async Region #################### |
| 41 | +--#################### ############ #################### |
| 42 | + |
| 43 | + |
| 44 | +local timeout = function (ms, callback) |
| 45 | + local timer = assert(uv.new_timer()) |
| 46 | + uv.timer_start(timer, ms, 0, function () |
| 47 | + assert(uv.timer_stop(timer)) |
| 48 | + assert(uv.close(timer)) |
| 49 | + callback() |
| 50 | + end) |
| 51 | +end |
| 52 | + |
| 53 | + |
| 54 | +-- typical nodejs / luv function |
| 55 | +local echo_2 = function (msg1, msg2, callback) |
| 56 | + -- wait 200ms |
| 57 | + timeout(200, function () |
| 58 | + callback(msg1, msg2) |
| 59 | + end) |
| 60 | +end |
| 61 | + |
| 62 | + |
| 63 | +-- thunkify echo_2 |
| 64 | +local e2 = a.wrap(echo_2) |
| 65 | + |
| 66 | + |
| 67 | +local async_tasks_1 = a.sync(function () |
| 68 | + local x, y = a.wait(e2(1, 2)) |
| 69 | + print(x, y) |
| 70 | + return x + y |
| 71 | +end) |
| 72 | + |
| 73 | + |
| 74 | +local async_tasks_2 = function (val) |
| 75 | + return a.sync(function () |
| 76 | + -- await all |
| 77 | + local w, z = a.wait_all{e2(val, val + 1), e2(val + 2, val + 3)} |
| 78 | + print(unpack(w), unpack(z)) |
| 79 | + return 5 |
| 80 | + end) |
| 81 | +end |
| 82 | + |
| 83 | + |
| 84 | +local async_example = a.sync(function () |
| 85 | + -- composable, await other async thunks |
| 86 | + local u = a.wait(async_tasks_1) |
| 87 | + local v = a.wait(async_tasks_2(3)) |
| 88 | + print(u + v) |
| 89 | +end) |
| 90 | + |
| 91 | + |
| 92 | +--#################### ############ #################### |
| 93 | +--#################### Loops Region #################### |
| 94 | +--#################### ############ #################### |
| 95 | + |
| 96 | + |
| 97 | +-- avoid textlock |
| 98 | +local main_loop = function (f) |
| 99 | + vim.schedule(f) |
| 100 | +end |
| 101 | + |
| 102 | + |
| 103 | +local vim_command = function () |
| 104 | +end |
| 105 | + |
| 106 | + |
| 107 | +local textlock_fail = a.sync(function () |
| 108 | + a.wait(e2(1, 2)) |
| 109 | + vim_command() |
| 110 | +end) |
| 111 | + |
| 112 | + |
| 113 | +local textlock_succ = a.sync(function () |
| 114 | + a.wait(e2(1, 2)) |
| 115 | + a.wait(main_loop) |
| 116 | + vim_command() |
| 117 | +end) |
| 118 | + |
| 119 | + |
| 120 | +return { |
| 121 | + sync_example = sync_example, |
| 122 | + async_example = async_example, |
| 123 | + textlock_fail = textlock_fail, |
| 124 | + textlock_succ = textlock_succ, |
| 125 | +} |
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