mirror of https://github.com/folke/lazy.nvim.git
108 lines
2.1 KiB
Lua
108 lines
2.1 KiB
Lua
---@class AsyncOpts
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---@field on_done? fun()
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---@field on_error? fun(err:string)
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---@field on_yield? fun(res:any)
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local M = {}
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---@type Async[]
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M._queue = {}
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M._executor = assert(vim.loop.new_check())
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M._running = false
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---@class Async
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---@field co thread
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---@field opts AsyncOpts
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local Async = {}
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---@param fn async fun()
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---@param opts? AsyncOpts
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---@return Async
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function Async.new(fn, opts)
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local self = setmetatable({}, { __index = Async })
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self.co = coroutine.create(fn)
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self.opts = opts or {}
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return self
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end
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function Async:running()
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return coroutine.status(self.co) ~= "dead"
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end
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function Async:step()
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local status = coroutine.status(self.co)
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if status == "suspended" then
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local ok, res = coroutine.resume(self.co)
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if not ok then
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if self.opts.on_error then
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self.opts.on_error(tostring(res))
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end
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elseif res then
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if self.opts.on_yield then
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self.opts.on_yield(res)
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end
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end
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end
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if self:running() then
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return true
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end
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if self.opts.on_done then
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self.opts.on_done()
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end
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end
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function M.step()
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M._running = true
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local budget = 1 * 1e6
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local start = vim.loop.hrtime()
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local count = #M._queue
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local i = 0
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while #M._queue > 0 and vim.loop.hrtime() - start < budget do
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---@type Async
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local state = table.remove(M._queue, 1)
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if state:step() then
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table.insert(M._queue, state)
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end
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i = i + 1
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if i >= count then
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break
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end
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end
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M._running = false
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if #M._queue == 0 then
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return M._executor:stop()
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end
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end
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---@param async Async
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function M.add(async)
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table.insert(M._queue, async)
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if not M._executor:is_active() then
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M._executor:start(vim.schedule_wrap(M.step))
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end
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return async
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end
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---@param fn async fun()
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---@param opts? AsyncOpts
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function M.run(fn, opts)
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return M.add(Async.new(fn, opts))
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end
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---@generic T: async fun()
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---@param fn T
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---@param opts? AsyncOpts
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---@return T
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function M.wrap(fn, opts)
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return function(...)
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local args = { ... }
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---@async
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local wrapped = function()
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return fn(unpack(args))
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end
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return M.run(wrapped, opts)
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end
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end
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return M
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