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--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-present, TBOOX Open Source Group.
--
-- @author ruki
-- @file thread.lua
--
-- define module
local thread = thread or {}
local _instance = _instance or {}
-- load modules
local io = require("base/io")
local libc = require("base/libc")
local bytes = require("base/bytes")
local table = require("base/table")
local string = require("base/string")
-- the thread status
thread.STATUS_READY = 1
thread.STATUS_RUNNING = 2
thread.STATUS_SUSPENDED = 3
thread.STATUS_DEAD = 4
-- new a thread
function _instance.new(callback, opt)
opt = opt or {}
local instance = table.inherit(_instance)
instance._NAME = opt.name or "anonymous"
instance._ARGV = opt.argv
instance._CALLBACK = opt.callback
instance._STACKSIZE = opt.stacksize or 0
instance._STATUS = thread.STATUS_READY
setmetatable(instance, _instance)
return instance
end
-- get thread name
function _instance:name()
return self._NAME
end
-- get cdata of thread
function _instance:cdata()
return self._HANLDE
end
-- get thread status
function _instance:status()
return self._STATUS
end
-- is ready?
function _instance:is_ready()
return self:status() == thread.STATUS_READY
end
-- is running?
function _instance:is_running()
return self:status() == thread.STATUS_RUNNING
end
-- is suspended?
function _instance:is_suspended()
return self:status() == thread.STATUS_SUSPENDED
end
-- is dead?
function _instance:is_dead()
return self:status() == thread.STATUS_DEAD
end
-- start thread
function _instance:start()
if not self:is_ready() then
return nil, string.format("%s: cannot start non-ready thread!", self)
end
assert(not self:cdata())
local handle, errors = thread.thread_init(self:name(), self._CALLBACK, self._ARGV, self._STACKSIZE)
if not handle then
return nil, errors or string.format("%s: failed to create thread!", self)
end
self._HANLDE = handle
self._STATUS = thread.STATUS_RUNNING
return true
end
-- suspend thread
function _instance:suspend()
if not self:is_running() then
return nil, string.format("%s: cannot suspend non-running thread!", self)
end
assert(self:cdata())
local ok, errors = thread.thread_suspend(self:cdata())
if not ok then
return nil, errors or string.format("%s: failed to suspend thread!", self)
end
self._STATUS = thread.STATUS_SUSPENDED
return true
end
-- resume thread
function _instance:resume()
if not self:is_suspended() then
return nil, string.format("%s: cannot suspend non-suspended thread!", self)
end
assert(self:cdata())
local ok, errors = thread.thread_resume(self:cdata())
if not ok then
return nil, errors or string.format("%s: failed to resume thread!", self)
end
self._STATUS = thread.STATUS_RUNNING
return true
end
-- wait thread
function _instance:wait(timeout)
if self:is_dead() then
return 1
elseif self:is_ready() then
return -1, string.format("%s: cannot wait ready thread!", self)
end
assert(self:cdata())
local ok, errors = thread.thread_wait(self:cdata(), timeout)
if ok < 0 then
return -1, errors or string.format("%s: failed to resume thread!", self)
end
if ok > 0 then
self._STATUS = thread.STATUS_DEAD
end
return ok
end
-- tostring(thread)
function _instance:__tostring()
local status_strs = self._STATUS_STRS
if not status_strs then
status_strs = {
[thread.STATUS_READY] = "ready",
[thread.STATUS_RUNNING] = "running",
[thread.STATUS_SUSPENDED] = "suspended",
[thread.STATUS_DEAD] = "dead"
}
self._STATUS_STRS = status_strs
end
return string.format("<thread: %s/%s>", self:name(), status_strs[self:status()])
end
-- gc(thread)
function _instance:__gc()
if self:cdata() and self:is_dead() and io.thread_exit(self:cdata()) then
self._HANLDE = nil
end
end
-- new a thread
--
-- @param callback the thread callback
-- @param opt the thread options, e.g. {name = "", argv = {}, stacksize = 8192}
--
-- @return the thread instance
--
function thread.new(callback, opt)
if callback == nil then
return nil, "invalid thread, callback is nil"
end
return _instance.new(callback, opt)
end
-- get the running thread
function thread.running()
-- TODO
end
-- return module
return thread
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