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https://github.com/neovim/neovim.git
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1ee18b4061
Problem: `attempt to yield across metamethod/C-call boundary` error when trying to use `vim.pack.add()`. Solution: use `pcall()` variant from 'coxpcall' on non-LuaJIT version of Lua.
111 lines
2.6 KiB
Lua
111 lines
2.6 KiB
Lua
local M = {}
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local max_timeout = 30000
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local copcall = package.loaded.jit and pcall or require('coxpcall').pcall
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--- @param thread thread
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--- @param on_finish fun(err: string?, ...:any)
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--- @param ... any
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local function resume(thread, on_finish, ...)
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--- @type {n: integer, [1]:boolean, [2]:string|function}
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local ret = vim.F.pack_len(coroutine.resume(thread, ...))
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local stat = ret[1]
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if not stat then
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-- Coroutine had error
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on_finish(ret[2] --[[@as string]])
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elseif coroutine.status(thread) == 'dead' then
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-- Coroutine finished
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on_finish(nil, unpack(ret, 2, ret.n))
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else
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local fn = ret[2]
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--- @cast fn -string
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--- @type boolean, string?
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local ok, err = copcall(fn, function(...)
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resume(thread, on_finish, ...)
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end)
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if not ok then
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on_finish(err)
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end
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end
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end
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--- @param func async fun(): ...:any
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--- @param on_finish? fun(err: string?, ...:any)
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function M.run(func, on_finish)
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local res --- @type {n:integer, [integer]:any}?
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resume(coroutine.create(func), function(err, ...)
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res = vim.F.pack_len(err, ...)
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if on_finish then
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on_finish(err, ...)
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end
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end)
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return {
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--- @param timeout? integer
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--- @return any ... return values of `func`
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wait = function(_self, timeout)
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vim.wait(timeout or max_timeout, function()
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return res ~= nil
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end)
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assert(res, 'timeout')
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if res[1] then
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error(res[1])
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end
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return unpack(res, 2, res.n)
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end,
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}
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end
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--- Asynchronous blocking wait
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--- @async
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--- @param argc integer
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--- @param fun function
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--- @param ... any func arguments
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--- @return any ...
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function M.await(argc, fun, ...)
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assert(coroutine.running(), 'Async.await() must be called from an async function')
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local args = vim.F.pack_len(...) --- @type {n:integer, [integer]:any}
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--- @param callback fun(...:any)
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return coroutine.yield(function(callback)
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args[argc] = assert(callback)
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fun(unpack(args, 1, math.max(argc, args.n)))
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end)
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end
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--- @async
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--- @param max_jobs integer
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--- @param funs (async fun())[]
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function M.join(max_jobs, funs)
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if #funs == 0 then
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return
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end
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max_jobs = math.min(max_jobs, #funs)
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--- @type (async fun())[]
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local remaining = { select(max_jobs + 1, unpack(funs)) }
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local to_go = #funs
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M.await(1, function(on_finish)
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local function run_next()
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to_go = to_go - 1
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if to_go == 0 then
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on_finish()
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elseif #remaining > 0 then
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local next_fun = table.remove(remaining)
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M.run(next_fun, run_next)
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end
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end
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for i = 1, max_jobs do
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M.run(funs[i], run_next)
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end
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end)
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end
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return M
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