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Remove dependency on marshal and many other async changes 

This makes a number of changes:
  * Remove the dependency on marshal by using string.dump and loadstring.
  * Use lua_tolstring rather than having Lua functions pass string lengths to C++.
  * Move lua_api/l_async_events.* to cpp_api/s_async.*, where it belongs.
  * Make AsyncWorkerThread a child of ScriptApiBase, this removes some duplicate functionality.
  * Don't wait for async threads to shut down.  (Is this safe?  Might result in corruption if the thread is writing to a file.)
  * Pop more unused items from the stack
  * Code style fixes
  * Other misc changes
This commit is contained in:
ShadowNinja 2014-04-15 13:41:07 -04:00
parent db4ea4658c
commit 6ab3b4c838
16 changed files with 571 additions and 1262 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
builtin/async_env.lua
View File

@ -1,19 +1,21 @@
engine.log("info","Initializing Asynchronous environment")
engine.log("info", "Initializing Asynchronous environment")
local tbl = engine or minetest
minetest = tbl
dofile(SCRIPTDIR .. DIR_DELIM .. "serialize.lua")
dofile(SCRIPTDIR .. DIR_DELIM .. "misc_helpers.lua")
function engine.job_processor(serialized_function, serialized_data)
function tbl.job_processor(serialized_func, serialized_param)
local func = loadstring(serialized_func)
local param = tbl.deserialize(serialized_param)
local retval = nil
local fct = marshal.decode(serialized_function)
local params = marshal.decode(serialized_data)
local retval = marshal.encode(nil)
if fct ~= nil and type(fct) == "function" then
local result = fct(params)
retval = marshal.encode(result)
if type(func) == "function" then
retval = tbl.serialize(func(param))
else
engine.log("error","ASYNC WORKER: unable to deserialize function")
tbl.log("error", "ASYNC WORKER: Unable to deserialize function")
end
return retval,retval:len()
return retval or tbl.serialize(nil)
end

68
builtin/async_event.lua
View File

@ -1,59 +1,45 @@
local tbl = engine or minetest
local SCRIPTDIR = SCRIPTDIR or tbl.get_scriptdir()
minetest = tbl
dofile(SCRIPTDIR .. DIR_DELIM .. "serialize.lua")
tbl.async_jobs = {}
if engine ~= nil then
function tbl.async_event_handler(jobid, serialized_retval)
local retval = nil
if serialized_retval ~= "ERROR" then
retval= marshal.decode(serialized_retval)
else
tbl.log("error","Error fetching async result")
end
assert(type(tbl.async_jobs[jobid]) == "function")
tbl.async_jobs[jobid](retval)
tbl.async_jobs[jobid] = nil
end
else
minetest.register_globalstep(
function(dtime)
local list = tbl.get_finished_jobs()
for i=1,#list,1 do
local retval = marshal.decode(list[i].retval)
assert(type(tbl.async_jobs[jobid]) == "function")
tbl.async_jobs[list[i].jobid](retval)
tbl.async_jobs[list[i].jobid] = nil
end
end)
local function handle_job(jobid, serialized_retval)
local retval = tbl.deserialize(serialized_retval)
assert(type(tbl.async_jobs[jobid]) == "function")
tbl.async_jobs[jobid](retval)
tbl.async_jobs[jobid] = nil
end
function tbl.handle_async(fct, parameters, callback)
if engine ~= nil then
tbl.async_event_handler = handle_job
else
minetest.register_globalstep(function(dtime)
for i, job in ipairs(tbl.get_finished_jobs()) do
handle_job(job.jobid, job.retval)
end
end)
end
--serialize fct
local serialized_fct = marshal.encode(fct)
function tbl.handle_async(func, parameter, callback)
-- Serialize function
local serialized_func = string.dump(func)
assert(marshal.decode(serialized_fct) ~= nil)
assert(serialized_func ~= nil)
--serialize parameters
local serialized_params = marshal.encode(parameters)
-- Serialize parameters
local serialized_param = tbl.serialize(parameter)
if serialized_fct == nil or
serialized_params == nil or
serialized_fct:len() == 0 or
serialized_params:len() == 0 then
if serialized_param == nil then
return false
end
local jobid = tbl.do_async_callback( serialized_fct,
serialized_fct:len(),
serialized_params,
serialized_params:len())
local jobid = tbl.do_async_callback(serialized_func, serialized_param)
tbl.async_jobs[jobid] = callback
return true
end

50
src/guiEngine.cpp
View File

@ -186,19 +186,20 @@ GUIEngine::GUIEngine( irr::IrrlichtDevice* dev,
// Initialize scripting
infostream<<"GUIEngine: Initializing Lua"<<std::endl;
infostream << "GUIEngine: Initializing Lua" << std::endl;
m_script = new MainMenuScripting(this);
try {
if (m_data->errormessage != "")
{
if (m_data->errormessage != "") {
m_script->setMainMenuErrorMessage(m_data->errormessage);
m_data->errormessage = "";
}
if (!loadMainMenuScript())
assert("no future without mainmenu" == 0);
if (!loadMainMenuScript()) {
errorstream << "No future without mainmenu" << std::endl;
abort();
}
run();
}
@ -512,32 +513,25 @@ bool GUIEngine::setTexture(texture_layer layer,std::string texturepath) {
/******************************************************************************/
bool GUIEngine::downloadFile(std::string url,std::string target) {
#if USE_CURL
bool retval = true;
std::ofstream targetfile(target.c_str(), std::ios::out | std::ios::binary);
FILE* targetfile = fopen(target.c_str(),"wb");
if (targetfile) {
HTTPFetchRequest fetchrequest;
HTTPFetchResult fetchresult;
fetchrequest.url = url;
fetchrequest.caller = HTTPFETCH_SYNC;
httpfetch_sync(fetchrequest,fetchresult);
if (fetchresult.succeeded) {
if (fwrite(fetchresult.data.c_str(),1,fetchresult.data.size(),targetfile) != fetchresult.data.size()) {
retval = false;
}
}
else {
retval = false;
}
fclose(targetfile);
}
else {
retval = false;
if (!targetfile.good()) {
return false;
}
return retval;
HTTPFetchRequest fetchrequest;
HTTPFetchResult fetchresult;
fetchrequest.url = url;
fetchrequest.caller = HTTPFETCH_SYNC;
httpfetch_sync(fetchrequest, fetchresult);
if (fetchresult.succeeded) {
targetfile << fetchresult.data;
} else {
return false;
}
return true;
#else
return false;
#endif

2
src/httpfetch.cpp
View File

@ -45,7 +45,7 @@ HTTPFetchRequest::HTTPFetchRequest()
caller = HTTPFETCH_DISCARD;
request_id = 0;
timeout = g_settings->getS32("curl_timeout");
connect_timeout = timeout * 5;
connect_timeout = timeout;
useragent = std::string("Minetest/") + minetest_version_hash + " (" + porting::get_sysinfo() + ")";
}

1
src/script/cpp_api/CMakeLists.txt
View File

@ -9,6 +9,7 @@ set(common_SCRIPT_CPP_API_SRCS
${CMAKE_CURRENT_SOURCE_DIR}/s_nodemeta.cpp
${CMAKE_CURRENT_SOURCE_DIR}/s_player.cpp
${CMAKE_CURRENT_SOURCE_DIR}/s_server.cpp
${CMAKE_CURRENT_SOURCE_DIR}/s_async.cpp
PARENT_SCOPE)
# Used by client only

301
src/script/cpp_api/s_async.cpp Normal file
View File

@ -0,0 +1,301 @@
/*
Minetest
Copyright (C) 2013 sapier, <sapier AT gmx DOT net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
extern "C" {
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
}
#include "s_async.h"
#include "log.h"
#include "filesys.h"
#include "porting.h"
#include "common/c_internal.h"
/******************************************************************************/
AsyncEngine::AsyncEngine() :
m_initDone(false),
m_JobIdCounter(0)
{
}
/******************************************************************************/
AsyncEngine::~AsyncEngine()
{
// Force kill all threads
for (std::vector<AsyncWorkerThread*>::iterator i = m_WorkerThreads.begin();
i != m_WorkerThreads.end(); i++) {
(*i)->Kill();
delete *i;
}
m_JobQueueMutex.Lock();
m_JobQueue.clear();
m_JobQueueMutex.Unlock();
m_WorkerThreads.clear();
}
/******************************************************************************/
bool AsyncEngine::registerFunction(const char* name, lua_CFunction func)
{
if (m_initDone) {
return false;
}
m_FunctionList[name] = func;
return true;
}
/******************************************************************************/
void AsyncEngine::Initialize(unsigned int numEngines)
{
m_initDone = true;
for (unsigned int i = 0; i < numEngines; i++) {
AsyncWorkerThread* toAdd = new AsyncWorkerThread(this, i);
m_WorkerThreads.push_back(toAdd);
toAdd->Start();
}
}
/******************************************************************************/
unsigned int AsyncEngine::doAsyncJob(std::string func, std::string params)
{
m_JobQueueMutex.Lock();
LuaJobInfo toadd;
toadd.JobId = m_JobIdCounter++;
toadd.serializedFunction = func;
toadd.serializedParams = params;
m_JobQueue.push_back(toadd);
m_JobQueueCounter.Post();
m_JobQueueMutex.Unlock();
return toadd.JobId;
}
/******************************************************************************/
LuaJobInfo AsyncEngine::getJob()
{
m_JobQueueCounter.Wait();
m_JobQueueMutex.Lock();
LuaJobInfo retval;
retval.valid = false;
if (m_JobQueue.size() != 0) {
retval = m_JobQueue.front();
retval.valid = true;
m_JobQueue.erase(m_JobQueue.begin());
}
m_JobQueueMutex.Unlock();
return retval;
}
/******************************************************************************/
void AsyncEngine::putJobResult(LuaJobInfo result)
{
m_ResultQueueMutex.Lock();
m_ResultQueue.push_back(result);
m_ResultQueueMutex.Unlock();
}
/******************************************************************************/
void AsyncEngine::Step(lua_State *L, int errorhandler)
{
lua_getglobal(L, "engine");
m_ResultQueueMutex.Lock();
while (!m_ResultQueue.empty()) {
LuaJobInfo jobdone = m_ResultQueue.front();
m_ResultQueue.erase(m_ResultQueue.begin());
lua_getfield(L, -1, "async_event_handler");
if (lua_isnil(L, -1)) {
assert("Async event handler does not exist!" == 0);
}
luaL_checktype(L, -1, LUA_TFUNCTION);
lua_pushinteger(L, jobdone.JobId);
lua_pushlstring(L, jobdone.serializedResult.c_str(),
jobdone.serializedResult.length());
if (lua_pcall(L, 2, 0, errorhandler)) {
script_error(L);
}
}
m_ResultQueueMutex.Unlock();
lua_pop(L, 1); // Pop engine
}
/******************************************************************************/
void AsyncEngine::PushFinishedJobs(lua_State* L) {
// Result Table
m_ResultQueueMutex.Lock();
unsigned int index = 1;
lua_createtable(L, m_ResultQueue.size(), 0);
int top = lua_gettop(L);
while (!m_ResultQueue.empty()) {
LuaJobInfo jobdone = m_ResultQueue.front();
m_ResultQueue.erase(m_ResultQueue.begin());
lua_createtable(L, 0, 2); // Pre-alocate space for two map fields
int top_lvl2 = lua_gettop(L);
lua_pushstring(L, "jobid");
lua_pushnumber(L, jobdone.JobId);
lua_settable(L, top_lvl2);
lua_pushstring(L, "retval");
lua_pushlstring(L, jobdone.serializedResult.data(),
jobdone.serializedResult.size());
lua_settable(L, top_lvl2);
lua_rawseti(L, top, index++);
}
m_ResultQueueMutex.Unlock();
}
/******************************************************************************/
void AsyncEngine::PrepareEnvironment(lua_State* L, int top) {
for (std::map<std::string, lua_CFunction>::iterator it = m_FunctionList.begin();
it != m_FunctionList.end(); it++) {
lua_pushstring(L, it->first.c_str());
lua_pushcfunction(L, it->second);
lua_settable(L, top);
}
}
/******************************************************************************/
AsyncWorkerThread::AsyncWorkerThread(AsyncEngine* jobDispatcher,
unsigned int threadNum) :
ScriptApiBase(),
m_JobDispatcher(jobDispatcher),
m_threadnum(threadNum)
{
lua_State *L = getStack();
luaL_openlibs(L);
// Prepare job lua environment
lua_newtable(L);
lua_setglobal(L, "engine");
lua_getglobal(L, "engine");
int top = lua_gettop(L);
lua_pushstring(L, DIR_DELIM);
lua_setglobal(L, "DIR_DELIM");
lua_pushstring(L,
(porting::path_share + DIR_DELIM + "builtin").c_str());
lua_setglobal(L, "SCRIPTDIR");
m_JobDispatcher->PrepareEnvironment(L, top);
}
/******************************************************************************/
AsyncWorkerThread::~AsyncWorkerThread()
{
assert(IsRunning() == false);
}
/******************************************************************************/
void* AsyncWorkerThread::Thread()
{
ThreadStarted();
// Register thread for error logging
char number[21];
snprintf(number, sizeof(number), "%d", m_threadnum);
log_register_thread(std::string("AsyncWorkerThread_") + number);
porting::setThreadName((std::string("AsyncWorkTh_") + number).c_str());
std::string asyncscript = porting::path_share + DIR_DELIM + "builtin"
+ DIR_DELIM + "async_env.lua";
if (!loadScript(asyncscript)) {
errorstream
<< "AsyncWorkderThread execution of async base environment failed!"
<< std::endl;
abort();
}
lua_State *L = getStack();
// Main loop
while (!StopRequested()) {
// Wait for job
LuaJobInfo toProcess = m_JobDispatcher->getJob();
if (toProcess.valid == false || StopRequested()) {
continue;
}
lua_getglobal(L, "engine");
if (lua_isnil(L, -1)) {
errorstream << "Unable to find engine within async environment!";
abort();
}
lua_getfield(L, -1, "job_processor");
if (lua_isnil(L, -1)) {
errorstream << "Unable to get async job processor!" << std::endl;
abort();
}
luaL_checktype(L, -1, LUA_TFUNCTION);
// Call it
lua_pushlstring(L,
toProcess.serializedFunction.data(),
toProcess.serializedFunction.size());
lua_pushlstring(L,
toProcess.serializedParams.data(),
toProcess.serializedParams.size());
if (lua_pcall(L, 2, 1, m_errorhandler)) {
scriptError();
toProcess.serializedResult = "";
} else {
// Fetch result
size_t length;
const char *retval = lua_tolstring(L, -1, &length);
toProcess.serializedResult = std::string(retval, length);
}
// Pop engine, job_processor, and retval
lua_pop(L, 3);
// Put job result
m_JobDispatcher->putJobResult(toProcess);
}
log_deregister_thread();
return 0;
}

171
src/script/cpp_api/s_async.h Normal file
View File

@ -0,0 +1,171 @@
/*
Minetest
Copyright (C) 2013 sapier, <sapier AT gmx DOT net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef L_ASYNC_EVENTS_H_
#define L_ASYNC_EVENTS_H_
#include <vector>
#include <map>
#include "jthread/jthread.h"
#include "jthread/jmutex.h"
#include "jthread/jsemaphore.h"
#include "debug.h"
#include "lua.h"
#include "cpp_api/s_base.h"
// Forward declarations
class AsyncEngine;
// Declarations
// Data required to queue a job
struct LuaJobInfo {
// Function to be called in async environment
std::string serializedFunction;
// Parameter to be passed to function
std::string serializedParams;
// Result of function call
std::string serializedResult;
// JobID used to identify a job and match it to callback
unsigned int JobId;
bool valid;
};
// Asynchronous working environment
class AsyncWorkerThread : public JThread, public ScriptApiBase {
public:
/**
* default constructor
* @param pointer to job dispatcher
*/
AsyncWorkerThread(AsyncEngine* jobDispatcher, unsigned int threadNum);
virtual ~AsyncWorkerThread();
void* Thread();
private:
AsyncEngine* m_JobDispatcher;
// Thread number. Used for debug output
unsigned int m_threadnum;
};
// Asynchornous thread and job management
class AsyncEngine {
friend class AsyncWorkerThread;
public:
AsyncEngine();
~AsyncEngine();
/**
* Register function to be used within engine
* @param name Function name to be used within Lua environment
* @param func C function to be called
*/
bool registerFunction(const char* name, lua_CFunction func);
/**
* Create async engine tasks and lock function registration
* @param numEngines Number of async threads to be started
*/
void Initialize(unsigned int numEngines);
/**
* queue/run a async job
* @param func Serialized lua function
* @param params Serialized parameters
* @return jobid The job is queued
*/
unsigned int doAsyncJob(std::string func, std::string params);
/**
* Engine step to process finished jobs
* the engine step is one way to pass events back, PushFinishedJobs another
* @param L The Lua stack
* @param errorhandler Stack index of the Lua error handler
*/
void Step(lua_State *L, int errorhandler);
/**
* Push a list of finished jobs onto the stack
* @param L The Lua stack
*/
void PushFinishedJobs(lua_State *L);
protected:
/**
* Get a Job from queue to be processed
* this function blocks until a job is ready
* @return a job to be processed
*/
LuaJobInfo getJob();
/**
* Put a Job result back to result queue
* @param result result of completed job
*/
void putJobResult(LuaJobInfo result);
/**
* Initialize environment with current registred functions
* this function adds all functions registred by registerFunction to the
* passed lua stack
* @param L Lua stack to initialize
* @param top Stack position
*/
void PrepareEnvironment(lua_State* L, int top);
private:
// Stack index of error handler
int m_errorhandler;
// variable locking the engine against further modification
bool m_initDone;
// Internal store for registred functions
std::map<std::string, lua_CFunction> m_FunctionList;
// Internal counter to create job IDs
unsigned int m_JobIdCounter;
// Mutex to protect job queue
JMutex m_JobQueueMutex;
// Job queue
std::vector<LuaJobInfo> m_JobQueue;
// Mutex to protect result queue
JMutex m_ResultQueueMutex;
// Result queue
std::vector<LuaJobInfo> m_ResultQueue;
// List of current worker threads
std::vector<AsyncWorkerThread*> m_WorkerThreads;
// Counter semaphore for job dispatching
JSemaphore m_JobQueueCounter;
};
#endif // L_ASYNC_EVENTS_H_

2
src/script/lua_api/CMakeLists.txt
View File

@ -16,8 +16,6 @@ set(common_SCRIPT_LUA_API_SRCS
${CMAKE_CURRENT_SOURCE_DIR}/l_util.cpp
${CMAKE_CURRENT_SOURCE_DIR}/l_vmanip.cpp
${CMAKE_CURRENT_SOURCE_DIR}/l_settings.cpp
${CMAKE_CURRENT_SOURCE_DIR}/l_async_events.cpp
${CMAKE_CURRENT_SOURCE_DIR}/marshall.c
PARENT_SCOPE)
# Used by client only

370
src/script/lua_api/l_async_events.cpp
View File

@ -1,370 +0,0 @@
/*
Minetest
Copyright (C) 2013 sapier, <sapier AT gmx DOT net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
extern "C" {
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
int luaopen_marshal(lua_State *L);
}
#include <stdio.h>
#include "l_async_events.h"
#include "log.h"
#include "filesys.h"
#include "porting.h"
#include "common/c_internal.h"
/******************************************************************************/
AsyncEngine::AsyncEngine() :
m_initDone(false),
m_JobIdCounter(0)
{
}
/******************************************************************************/
AsyncEngine::~AsyncEngine()
{
/** request all threads to stop **/
for (std::vector<AsyncWorkerThread*>::iterator i= m_WorkerThreads.begin();
i != m_WorkerThreads.end();i++) {
(*i)->Stop();
}
/** wakeup all threads **/
for (std::vector<AsyncWorkerThread*>::iterator i= m_WorkerThreads.begin();
i != m_WorkerThreads.end();i++) {
m_JobQueueCounter.Post();
}
/** wait for threads to finish **/
for (std::vector<AsyncWorkerThread*>::iterator i= m_WorkerThreads.begin();
i != m_WorkerThreads.end();i++) {
(*i)->Wait();
}
/** force kill all threads **/
for (std::vector<AsyncWorkerThread*>::iterator i= m_WorkerThreads.begin();
i != m_WorkerThreads.end();i++) {
(*i)->Kill();
delete *i;
}
m_JobQueueMutex.Lock();
m_JobQueue.clear();
m_JobQueueMutex.Unlock();
m_WorkerThreads.clear();
}
/******************************************************************************/
bool AsyncEngine::registerFunction(const char* name, lua_CFunction fct) {
if (m_initDone) return false;
m_FunctionList[name] = fct;
return true;
}
/******************************************************************************/
void AsyncEngine::Initialize(unsigned int numengines) {
m_initDone = true;
for (unsigned int i=0; i < numengines; i ++) {
AsyncWorkerThread* toadd = new AsyncWorkerThread(this,i);
m_WorkerThreads.push_back(toadd);
toadd->Start();
}
}
/******************************************************************************/
unsigned int AsyncEngine::doAsyncJob(std::string fct, std::string params) {
m_JobQueueMutex.Lock();
LuaJobInfo toadd;
toadd.JobId = m_JobIdCounter++;
toadd.serializedFunction = fct;
toadd.serializedParams = params;
m_JobQueue.push_back(toadd);
m_JobQueueCounter.Post();
m_JobQueueMutex.Unlock();
return toadd.JobId;
}
/******************************************************************************/
LuaJobInfo AsyncEngine::getJob() {
m_JobQueueCounter.Wait();
m_JobQueueMutex.Lock();
LuaJobInfo retval;
retval.valid = false;
if (m_JobQueue.size() != 0) {
retval = m_JobQueue.front();
retval.valid = true;
m_JobQueue.erase((m_JobQueue.begin()));
}
m_JobQueueMutex.Unlock();
return retval;
}
/******************************************************************************/
void AsyncEngine::putJobResult(LuaJobInfo result) {
m_ResultQueueMutex.Lock();
m_ResultQueue.push_back(result);
m_ResultQueueMutex.Unlock();
}
/******************************************************************************/
void AsyncEngine::Step(lua_State *L) {
lua_pushcfunction(L, script_error_handler);
int errorhandler = lua_gettop(L);
lua_getglobal(L, "engine");
m_ResultQueueMutex.Lock();
while(!m_ResultQueue.empty()) {
LuaJobInfo jobdone = m_ResultQueue.front();
m_ResultQueue.erase(m_ResultQueue.begin());
lua_getfield(L, -1, "async_event_handler");
if(lua_isnil(L, -1))
assert("Someone managed to destroy a async callback in engine!" == 0);
luaL_checktype(L, -1, LUA_TFUNCTION);
lua_pushinteger(L, jobdone.JobId);
lua_pushlstring(L, jobdone.serializedResult.c_str(),
jobdone.serializedResult.length());
if(lua_pcall(L, 2, 0, errorhandler)) {
script_error(L);
}
}
m_ResultQueueMutex.Unlock();
lua_pop(L, 2); // Pop engine and error handler
}
/******************************************************************************/
void AsyncEngine::PushFinishedJobs(lua_State* L) {
//Result Table
m_ResultQueueMutex.Lock();
unsigned int index=1;
lua_newtable(L);
int top = lua_gettop(L);
while(!m_ResultQueue.empty()) {
LuaJobInfo jobdone = m_ResultQueue.front();
m_ResultQueue.erase(m_ResultQueue.begin());
lua_pushnumber(L,index);
lua_newtable(L);
int top_lvl2 = lua_gettop(L);
lua_pushstring(L,"jobid");
lua_pushnumber(L,jobdone.JobId);
lua_settable(L, top_lvl2);
lua_pushstring(L,"retval");
lua_pushstring(L, jobdone.serializedResult.c_str());
lua_settable(L, top_lvl2);
lua_settable(L, top);
index++;
}
m_ResultQueueMutex.Unlock();
}
/******************************************************************************/
void AsyncEngine::PrepareEnvironment(lua_State* L, int top) {
for(std::map<std::string,lua_CFunction>::iterator i = m_FunctionList.begin();
i != m_FunctionList.end(); i++) {
lua_pushstring(L,i->first.c_str());
lua_pushcfunction(L,i->second);
lua_settable(L, top);
}
}
/******************************************************************************/
int async_worker_ErrorHandler(lua_State *L) {
lua_getfield(L, LUA_GLOBALSINDEX, "debug");
if (!lua_istable(L, -1)) {
lua_pop(L, 1);
return 1;
}
lua_getfield(L, -1, "traceback");
if (!lua_isfunction(L, -1)) {
lua_pop(L, 2);
return 1;
}
lua_pushvalue(L, 1);
lua_pushinteger(L, 2);
lua_call(L, 2, 1);
return 1;
}
/******************************************************************************/
AsyncWorkerThread::AsyncWorkerThread(AsyncEngine* jobdispatcher,
unsigned int numthreadnumber) :
m_JobDispatcher(jobdispatcher),
m_luaerrorhandler(-1),
m_threadnum(numthreadnumber)
{
// create luastack
m_LuaStack = luaL_newstate();
// load basic lua modules
luaL_openlibs(m_LuaStack);
// load serialization functions
luaopen_marshal(m_LuaStack);
}
/******************************************************************************/
AsyncWorkerThread::~AsyncWorkerThread() {
assert(IsRunning() == false);
lua_close(m_LuaStack);
}
/******************************************************************************/
void* AsyncWorkerThread::worker_thread_main() {
//register thread for error logging
char number[21];
snprintf(number,sizeof(number),"%d",m_threadnum);
log_register_thread(std::string("AsyncWorkerThread_") + number);
porting::setThreadName(
std::string(std::string("AsyncWorkTh_") + number).c_str());
/** prepare job lua environment **/
lua_newtable(m_LuaStack);
lua_setglobal(m_LuaStack, "engine");
lua_getglobal(m_LuaStack, "engine");
int top = lua_gettop(m_LuaStack);
lua_pushstring(m_LuaStack, DIR_DELIM);
lua_setglobal(m_LuaStack, "DIR_DELIM");
lua_pushstring(m_LuaStack,
std::string(porting::path_share + DIR_DELIM + "builtin").c_str());
lua_setglobal(m_LuaStack, "SCRIPTDIR");
m_JobDispatcher->PrepareEnvironment(m_LuaStack,top);
std::string asyncscript =
porting::path_share + DIR_DELIM + "builtin"
+ DIR_DELIM + "async_env.lua";
lua_pushcfunction(m_LuaStack, async_worker_ErrorHandler);
m_luaerrorhandler = lua_gettop(m_LuaStack);
if(!runScript(asyncscript)) {
infostream
<< "AsyncWorkderThread::worker_thread_main execution of async base environment failed!"
<< std::endl;
assert("no future with broken builtin async environment scripts" == 0);
}
/** main loop **/
while(!StopRequested()) {
//wait for job
LuaJobInfo toprocess = m_JobDispatcher->getJob();
if (toprocess.valid == false) { continue; }
if (StopRequested()) { continue; }
//first push error handler
lua_pushcfunction(m_LuaStack, script_error_handler);
int errorhandler = lua_gettop(m_LuaStack);
lua_getglobal(m_LuaStack, "engine");
if(lua_isnil(m_LuaStack, -1))
assert("unable to find engine within async environment" == 0);
lua_getfield(m_LuaStack, -1, "job_processor");
if(lua_isnil(m_LuaStack, -1))
assert("Someone managed to destroy a async worker engine!" == 0);
luaL_checktype(m_LuaStack, -1, LUA_TFUNCTION);
//call it
lua_pushlstring(m_LuaStack,
toprocess.serializedFunction.c_str(),
toprocess.serializedFunction.length());
lua_pushlstring(m_LuaStack,
toprocess.serializedParams.c_str(),
toprocess.serializedParams.length());
if (StopRequested()) { continue; }
if(lua_pcall(m_LuaStack, 2, 2, errorhandler)) {
script_error(m_LuaStack);
toprocess.serializedResult = "ERROR";
} else {
//fetch result
const char *retval = lua_tostring(m_LuaStack, -2);
unsigned int lenght = lua_tointeger(m_LuaStack,-1);
toprocess.serializedResult = std::string(retval,lenght);
}
if (StopRequested()) { continue; }
//put job result
m_JobDispatcher->putJobResult(toprocess);
}
log_deregister_thread();
return 0;
}
/******************************************************************************/
bool AsyncWorkerThread::runScript(std::string script) {
int ret = luaL_loadfile(m_LuaStack, script.c_str()) ||
lua_pcall(m_LuaStack, 0, 0, m_luaerrorhandler);
if(ret){
errorstream<<"==== ERROR FROM LUA WHILE INITIALIZING ASYNC ENVIRONMENT ====="<<std::endl;
errorstream<<"Failed to load and run script from "<<std::endl;
errorstream<<script<<":"<<std::endl;
errorstream<<std::endl;
errorstream<<lua_tostring(m_LuaStack, -1)<<std::endl;
errorstream<<std::endl;
errorstream<<"=================== END OF ERROR FROM LUA ===================="<<std::endl;
lua_pop(m_LuaStack, 1); // Pop error message from stack
lua_pop(m_LuaStack, 1); // Pop the error handler from stack
return false;
}
return true;
}
/******************************************************************************/
void* AsyncWorkerThread::worker_thread_wrapper(void* thread) {
return ((AsyncWorkerThread*) thread)->worker_thread_main();
}

220
src/script/lua_api/l_async_events.h
View File

@ -1,220 +0,0 @@
/*
Minetest
Copyright (C) 2013 sapier, <sapier AT gmx DOT net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef L_ASYNC_EVENTS_H_
#define L_ASYNC_EVENTS_H_
#include <vector>
#include <map>
/******************************************************************************/
/* Includes */
/******************************************************************************/
#include "jthread/jthread.h"
#include "jthread/jmutex.h"
#include "jthread/jsemaphore.h"
#include "debug.h"
#include "lua.h"
/******************************************************************************/
/* Typedefs and macros */
/******************************************************************************/
#define MAINMENU_NUMBER_OF_ASYNC_THREADS 4
/******************************************************************************/
/* forward declarations */
/******************************************************************************/
class AsyncEngine;
/******************************************************************************/
/* declarations */
/******************************************************************************/
/** a struct to encapsulate data required to queue a job **/
struct LuaJobInfo {
/** function to be called in async environment **/
std::string serializedFunction;
/** parameter table to be passed to function **/
std::string serializedParams;
/** result of function call **/
std::string serializedResult;
/** jobid used to identify a job and match it to callback **/
unsigned int JobId;
/** valid marker **/
bool valid;
};
/** class encapsulating a asynchronous working environment **/
class AsyncWorkerThread : public JThread {
public:
/**
* default constructor
* @param pointer to job dispatcher
*/
AsyncWorkerThread(AsyncEngine* jobdispatcher, unsigned int threadnumber);
/**
* default destructor
*/
virtual ~AsyncWorkerThread();
/**
* thread function
*/
void* Thread() {
ThreadStarted();
return worker_thread_wrapper(this);
}
private:
/**
* helper function to run a lua script
* @param path of script
*/
bool runScript(std::string script);
/**
* main function of thread
*/
void* worker_thread_main();
/**
* static wrapper for thread creation
* @param this pointer to the thread to be created
*/
static void* worker_thread_wrapper(void* thread);
/**
* pointer to job dispatcher
*/
AsyncEngine* m_JobDispatcher;
/**
* the lua stack to run at
*/
lua_State* m_LuaStack;
/**
* lua internal stack number of error handler
*/
int m_luaerrorhandler;
/**
* thread number used for debug output
*/
unsigned int m_threadnum;
};
/** asynchornous thread and job management **/
class AsyncEngine {
friend class AsyncWorkerThread;
public:
/**
* default constructor
*/
AsyncEngine();
/**
* default destructor
*/
~AsyncEngine();
/**
* register function to be used within engines
* @param name function name to be used within lua environment
* @param fct c-function to be called
*/
bool registerFunction(const char* name, lua_CFunction fct);
/**
* create async engine tasks and lock function registration
* @param numengines number of async threads to be started
*/
void Initialize(unsigned int numengines);
/**
* queue/run a async job
* @param fct serialized lua function
* @param params serialized parameters
* @return jobid the job is queued
*/
unsigned int doAsyncJob(std::string fct, std::string params);
/**
* engine step to process finished jobs
* the engine step is one way to pass events back, PushFinishedJobs another
* @param L the lua environment to do the step in
*/
void Step(lua_State *L);
void PushFinishedJobs(lua_State* L);
protected:
/**
* Get a Job from queue to be processed
* this function blocks until a job is ready
* @return a job to be processed
*/
LuaJobInfo getJob();
/**
* put a Job result back to result queue
* @param result result of completed job
*/
void putJobResult(LuaJobInfo result);
/**
* initialize environment with current registred functions
* this function adds all functions registred by registerFunction to the
* passed lua stack
* @param L lua stack to initialize
* @param top stack position
*/
void PrepareEnvironment(lua_State* L, int top);
private:
/** variable locking the engine against further modification **/
bool m_initDone;
/** internal store for registred functions **/
std::map<std::string,lua_CFunction> m_FunctionList;
/** internal counter to create job id's **/
unsigned int m_JobIdCounter;
/** mutex to protect job queue **/
JMutex m_JobQueueMutex;
/** job queue **/
std::vector<LuaJobInfo> m_JobQueue;
/** mutext to protect result queue **/
JMutex m_ResultQueueMutex;
/** result queue **/
std::vector<LuaJobInfo> m_ResultQueue;
/** list of current worker threads **/
std::vector<AsyncWorkerThread*> m_WorkerThreads;
/** counter semaphore for job dispatching **/
JSemaphore m_JobQueueCounter;
};
#endif /* L_ASYNC_EVENTS_H_ */

19
src/script/lua_api/l_mainmenu.cpp
View File

@ -20,7 +20,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "lua_api/l_mainmenu.h"
#include "lua_api/l_internal.h"
#include "common/c_content.h"
#include "lua_api/l_async_events.h"
#include "cpp_api/s_async.h"
#include "guiEngine.h"
#include "guiMainMenu.h"
#include "guiKeyChangeMenu.h"
@ -1034,19 +1034,18 @@ int ModApiMainMenu::l_do_async_callback(lua_State *L)
{
GUIEngine* engine = getGuiEngine(L);
const char* serialized_fct_raw = luaL_checkstring(L, 1);
unsigned int lenght_fct = luaL_checkint(L, 2);
size_t func_length, param_length;
const char* serialized_func_raw = luaL_checklstring(L, 1, &func_length);
const char* serialized_params_raw = luaL_checkstring(L, 3);
unsigned int lenght_params = luaL_checkint(L, 4);
const char* serialized_param_raw = luaL_checklstring(L, 2, &param_length);
assert(serialized_fct_raw != 0);
assert(serialized_params_raw != 0);
assert(serialized_func_raw != NULL);
assert(serialized_param_raw != NULL);
std::string serialized_fct = std::string(serialized_fct_raw,lenght_fct);
std::string serialized_params = std::string(serialized_params_raw,lenght_params);
std::string serialized_func = std::string(serialized_func_raw, func_length);
std::string serialized_param = std::string(serialized_param_raw, param_length);
lua_pushinteger(L,engine->DoAsync(serialized_fct,serialized_params));
lua_pushinteger(L, engine->DoAsync(serialized_func, serialized_param));
return 1;
}

2
src/script/lua_api/l_util.cpp
View File

@ -21,7 +21,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "lua_api/l_internal.h"
#include "common/c_converter.h"
#include "common/c_content.h"
#include "lua_api/l_async_events.h"
#include "cpp_api/s_async.h"
#include "debug.h"
#include "log.h"
#include "tool.h"

551
src/script/lua_api/marshall.c
View File

@ -1,551 +0,0 @@
/*
* lmarshal.c
* A Lua library for serializing and deserializing Lua values
* Richard Hundt <richardhundt@gmail.com>
*
* License: MIT
*
* Copyright (c) 2010 Richard Hundt
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include "lua.h"
#include "lualib.h"
#include "lauxlib.h"
#define MAR_TREF 1
#define MAR_TVAL 2
#define MAR_TUSR 3
#define MAR_CHR 1
#define MAR_I32 4
#define MAR_I64 8
#define MAR_MAGIC 0x8e
#define SEEN_IDX 3
typedef struct mar_Buffer {
size_t size;
size_t seek;
size_t head;
char* data;
} mar_Buffer;
static int mar_encode_table(lua_State *L, mar_Buffer *buf, size_t *idx);
static int mar_decode_table(lua_State *L, const char* buf, size_t len, size_t *idx);
static void buf_init(lua_State *L, mar_Buffer *buf)
{
buf->size = 128;
buf->seek = 0;
buf->head = 0;
if (!(buf->data = malloc(buf->size))) luaL_error(L, "Out of memory!");
}
static void buf_done(lua_State* L, mar_Buffer *buf)
{
free(buf->data);
}
static int buf_write(lua_State* L, const char* str, size_t len, mar_Buffer *buf)
{
if (len > UINT32_MAX) luaL_error(L, "buffer too long");
if (buf->size - buf->head < len) {
size_t new_size = buf->size << 1;
size_t cur_head = buf->head;
while (new_size - cur_head <= len) {
new_size = new_size << 1;
}
if (!(buf->data = realloc(buf->data, new_size))) {
luaL_error(L, "Out of memory!");
}
buf->size = new_size;
}
memcpy(&buf->data[buf->head], str, len);
buf->head += len;
return 0;
}
static const char* buf_read(lua_State *L, mar_Buffer *buf, size_t *len)
{
if (buf->seek < buf->head) {
buf->seek = buf->head;
*len = buf->seek;
return buf->data;
}
*len = 0;
return NULL;
}
static void mar_encode_value(lua_State *L, mar_Buffer *buf, int val, size_t *idx)
{
size_t l;
int val_type = lua_type(L, val);
lua_pushvalue(L, val);
buf_write(L, (void*)&val_type, MAR_CHR, buf);
switch (val_type) {
case LUA_TBOOLEAN: {
int int_val = lua_toboolean(L, -1);
buf_write(L, (void*)&int_val, MAR_CHR, buf);
break;
}
case LUA_TSTRING: {
const char *str_val = lua_tolstring(L, -1, &l);
buf_write(L, (void*)&l, MAR_I32, buf);
buf_write(L, str_val, l, buf);
break;
}
case LUA_TNUMBER: {
lua_Number num_val = lua_tonumber(L, -1);
buf_write(L, (void*)&num_val, MAR_I64, buf);
break;
}
case LUA_TTABLE: {
int tag, ref;
lua_pushvalue(L, -1);
lua_rawget(L, SEEN_IDX);
if (!lua_isnil(L, -1)) {
ref = lua_tointeger(L, -1);
tag = MAR_TREF;
buf_write(L, (void*)&tag, MAR_CHR, buf);
buf_write(L, (void*)&ref, MAR_I32, buf);
lua_pop(L, 1);
}
else {
mar_Buffer rec_buf;
lua_pop(L, 1); /* pop nil */
if (luaL_getmetafield(L, -1, "__persist")) {
tag = MAR_TUSR;
lua_pushvalue(L, -2); /* self */
lua_call(L, 1, 1);
if (!lua_isfunction(L, -1)) {
luaL_error(L, "__persist must return a function");
}
lua_remove(L, -2); /* __persist */
lua_newtable(L);
lua_pushvalue(L, -2); /* callback */
lua_rawseti(L, -2, 1);
buf_init(L, &rec_buf);
mar_encode_table(L, &rec_buf, idx);
buf_write(L, (void*)&tag, MAR_CHR, buf);
buf_write(L, (void*)&rec_buf.head, MAR_I32, buf);
buf_write(L, rec_buf.data, rec_buf.head, buf);
buf_done(L, &rec_buf);
lua_pop(L, 1);
}
else {
tag = MAR_TVAL;
lua_pushvalue(L, -1);
lua_pushinteger(L, (*idx)++);
lua_rawset(L, SEEN_IDX);
lua_pushvalue(L, -1);
buf_init(L, &rec_buf);
mar_encode_table(L, &rec_buf, idx);
lua_pop(L, 1);
buf_write(L, (void*)&tag, MAR_CHR, buf);
buf_write(L, (void*)&rec_buf.head, MAR_I32, buf);
buf_write(L, rec_buf.data,rec_buf.head, buf);
buf_done(L, &rec_buf);
}
}
break;
}
case LUA_TFUNCTION: {
int tag, ref;
lua_pushvalue(L, -1);
lua_rawget(L, SEEN_IDX);
if (!lua_isnil(L, -1)) {
ref = lua_tointeger(L, -1);
tag = MAR_TREF;
buf_write(L, (void*)&tag, MAR_CHR, buf);
buf_write(L, (void*)&ref, MAR_I32, buf);
lua_pop(L, 1);
}
else {
mar_Buffer rec_buf;
int i;
lua_Debug ar;
lua_pop(L, 1); /* pop nil */
lua_pushvalue(L, -1);
lua_getinfo(L, ">nuS", &ar);
if (ar.what[0] != 'L') {
luaL_error(L, "attempt to persist a C function '%s'", ar.name);
}
tag = MAR_TVAL;
lua_pushvalue(L, -1);
lua_pushinteger(L, (*idx)++);
lua_rawset(L, SEEN_IDX);
lua_pushvalue(L, -1);
buf_init(L, &rec_buf);
lua_dump(L, (lua_Writer)buf_write, &rec_buf);
buf_write(L, (void*)&tag, MAR_CHR, buf);
buf_write(L, (void*)&rec_buf.head, MAR_I32, buf);
buf_write(L, rec_buf.data, rec_buf.head, buf);
buf_done(L, &rec_buf);
lua_pop(L, 1);
lua_newtable(L);
for (i=1; i <= ar.nups; i++) {
lua_getupvalue(L, -2, i);
lua_rawseti(L, -2, i);
}
buf_init(L, &rec_buf);
mar_encode_table(L, &rec_buf, idx);
buf_write(L, (void*)&rec_buf.head, MAR_I32, buf);
buf_write(L, rec_buf.data, rec_buf.head, buf);
buf_done(L, &rec_buf);
lua_pop(L, 1);
}
break;
}
case LUA_TUSERDATA: {
int tag, ref;
lua_pushvalue(L, -1);
lua_rawget(L, SEEN_IDX);
if (!lua_isnil(L, -1)) {
ref = lua_tointeger(L, -1);
tag = MAR_TREF;
buf_write(L, (void*)&tag, MAR_CHR, buf);
buf_write(L, (void*)&ref, MAR_I32, buf);
lua_pop(L, 1);
}
else {
mar_Buffer rec_buf;
lua_pop(L, 1); /* pop nil */
if (luaL_getmetafield(L, -1, "__persist")) {
tag = MAR_TUSR;
lua_pushvalue(L, -2);
lua_pushinteger(L, (*idx)++);
lua_rawset(L, SEEN_IDX);
lua_pushvalue(L, -2);
lua_call(L, 1, 1);
if (!lua_isfunction(L, -1)) {
luaL_error(L, "__persist must return a function");
}
lua_newtable(L);
lua_pushvalue(L, -2);
lua_rawseti(L, -2, 1);
lua_remove(L, -2);
buf_init(L, &rec_buf);
mar_encode_table(L, &rec_buf, idx);
buf_write(L, (void*)&tag, MAR_CHR, buf);
buf_write(L, (void*)&rec_buf.head, MAR_I32, buf);
buf_write(L, rec_buf.data, rec_buf.head, buf);
buf_done(L, &rec_buf);
}
else {
luaL_error(L, "attempt to encode userdata (no __persist hook)");
}
lua_pop(L, 1);
}
break;
}
case LUA_TNIL: break;
default:
luaL_error(L, "invalid value type (%s)", lua_typename(L, val_type));
}
lua_pop(L, 1);
}
static int mar_encode_table(lua_State *L, mar_Buffer *buf, size_t *idx)
{
lua_pushnil(L);
while (lua_next(L, -2) != 0) {
mar_encode_value(L, buf, -2, idx);
mar_encode_value(L, buf, -1, idx);
lua_pop(L, 1);
}
return 1;
}
#define mar_incr_ptr(l) \
if (((*p)-buf)+(l) > len) luaL_error(L, "bad code"); (*p) += (l);
#define mar_next_len(l,T) \
if (((*p)-buf)+sizeof(T) > len) luaL_error(L, "bad code"); \
l = *(T*)*p; (*p) += sizeof(T);
static void mar_decode_value
(lua_State *L, const char *buf, size_t len, const char **p, size_t *idx)
{
size_t l;
char val_type = **p;
mar_incr_ptr(MAR_CHR);
switch (val_type) {
case LUA_TBOOLEAN:
lua_pushboolean(L, *(char*)*p);
mar_incr_ptr(MAR_CHR);
break;
case LUA_TNUMBER:
lua_pushnumber(L, *(lua_Number*)*p);
mar_incr_ptr(MAR_I64);
break;
case LUA_TSTRING:
mar_next_len(l, uint32_t);
lua_pushlstring(L, *p, l);
mar_incr_ptr(l);
break;
case LUA_TTABLE: {
char tag = *(char*)*p;
mar_incr_ptr(MAR_CHR);
if (tag == MAR_TREF) {
int ref;
mar_next_len(ref, int);
lua_rawgeti(L, SEEN_IDX, ref);
}
else if (tag == MAR_TVAL) {
mar_next_len(l, uint32_t);
lua_newtable(L);
lua_pushvalue(L, -1);
lua_rawseti(L, SEEN_IDX, (*idx)++);
mar_decode_table(L, *p, l, idx);
mar_incr_ptr(l);
}
else if (tag == MAR_TUSR) {
mar_next_len(l, uint32_t);
lua_newtable(L);
mar_decode_table(L, *p, l, idx);
lua_rawgeti(L, -1, 1);
lua_call(L, 0, 1);
lua_remove(L, -2);
lua_pushvalue(L, -1);
lua_rawseti(L, SEEN_IDX, (*idx)++);
mar_incr_ptr(l);
}
else {
luaL_error(L, "bad encoded data");
}
break;
}
case LUA_TFUNCTION: {
size_t nups;
int i;
mar_Buffer dec_buf;
char tag = *(char*)*p;
mar_incr_ptr(1);
if (tag == MAR_TREF) {
int ref;
mar_next_len(ref, int);
lua_rawgeti(L, SEEN_IDX, ref);
}
else {
mar_next_len(l, uint32_t);
dec_buf.data = (char*)*p;
dec_buf.size = l;
dec_buf.head = l;
dec_buf.seek = 0;
lua_load(L, (lua_Reader)buf_read, &dec_buf, "=marshal");
mar_incr_ptr(l);
lua_pushvalue(L, -1);
lua_rawseti(L, SEEN_IDX, (*idx)++);
mar_next_len(l, uint32_t);
lua_newtable(L);
mar_decode_table(L, *p, l, idx);
nups = lua_objlen(L, -1);
for (i=1; i <= nups; i++) {
lua_rawgeti(L, -1, i);
lua_setupvalue(L, -3, i);
}
lua_pop(L, 1);
mar_incr_ptr(l);
}
break;
}
case LUA_TUSERDATA: {
char tag = *(char*)*p;
mar_incr_ptr(MAR_CHR);
if (tag == MAR_TREF) {
int ref;
mar_next_len(ref, int);
lua_rawgeti(L, SEEN_IDX, ref);
}
else if (tag == MAR_TUSR) {
mar_next_len(l, uint32_t);
lua_newtable(L);
mar_decode_table(L, *p, l, idx);
lua_rawgeti(L, -1, 1);
lua_call(L, 0, 1);
lua_remove(L, -2);
lua_pushvalue(L, -1);
lua_rawseti(L, SEEN_IDX, (*idx)++);
mar_incr_ptr(l);
}
else { /* tag == MAR_TVAL */
lua_pushnil(L);
}
break;
}
case LUA_TNIL:
case LUA_TTHREAD:
lua_pushnil(L);
break;
default:
luaL_error(L, "bad code");
}
}
static int mar_decode_table(lua_State *L, const char* buf, size_t len, size_t *idx)
{
const char* p;
p = buf;
while (p - buf < len) {
mar_decode_value(L, buf, len, &p, idx);
mar_decode_value(L, buf, len, &p, idx);
lua_settable(L, -3);
}
return 1;
}
static int mar_encode(lua_State* L)
{
const unsigned char m = MAR_MAGIC;
size_t idx, len;
mar_Buffer buf;
if (lua_isnone(L, 1)) {
lua_pushnil(L);
}
if (lua_isnoneornil(L, 2)) {
lua_newtable(L);
}
else if (!lua_istable(L, 2)) {
luaL_error(L, "bad argument #2 to encode (expected table)");
}
lua_settop(L, 2);
len = lua_objlen(L, 2);
lua_newtable(L);
for (idx = 1; idx <= len; idx++) {
lua_rawgeti(L, 2, idx);
if (lua_isnil(L, -1)) {
lua_pop(L, 1);
continue;
}
lua_pushinteger(L, idx);
lua_rawset(L, SEEN_IDX);
}
lua_pushvalue(L, 1);
buf_init(L, &buf);
buf_write(L, (void*)&m, 1, &buf);
mar_encode_value(L, &buf, -1, &idx);
lua_pop(L, 1);
lua_pushlstring(L, buf.data, buf.head);
buf_done(L, &buf);
lua_remove(L, SEEN_IDX);
return 1;
}
static int mar_decode(lua_State* L)
{
size_t l, idx, len;
const char *p;
const char *s = luaL_checklstring(L, 1, &l);
if (l < 1) luaL_error(L, "bad header");
if (*(unsigned char *)s++ != MAR_MAGIC) luaL_error(L, "bad magic");
l -= 1;
if (lua_isnoneornil(L, 2)) {
lua_newtable(L);
}
else if (!lua_istable(L, 2)) {
luaL_error(L, "bad argument #2 to decode (expected table)");
}
lua_settop(L, 2);
len = lua_objlen(L, 2);
lua_newtable(L);
for (idx = 1; idx <= len; idx++) {
lua_rawgeti(L, 2, idx);
lua_rawseti(L, SEEN_IDX, idx);
}
p = s;
mar_decode_value(L, s, l, &p, &idx);
lua_remove(L, SEEN_IDX);
lua_remove(L, 2);
return 1;
}
static int mar_clone(lua_State* L)
{
mar_encode(L);
lua_replace(L, 1);
mar_decode(L);
return 1;
}
static const luaL_reg R[] =
{
{"encode", mar_encode},
{"decode", mar_decode},
{"clone", mar_clone},
{NULL, NULL}
};
int luaopen_marshal(lua_State *L)
{
lua_newtable(L);
luaL_register(L, "marshal", R);
return 1;
}

9
src/script/scripting_game.cpp
View File

@ -56,6 +56,9 @@ GameScripting::GameScripting(Server* server)
// Create the main minetest table
lua_newtable(L);
lua_setglobal(L, "minetest");
lua_getglobal(L, "minetest");
int top = lua_gettop(L);
lua_newtable(L);
lua_setfield(L, -2, "object_refs");
@ -63,15 +66,11 @@ GameScripting::GameScripting(Server* server)
lua_newtable(L);
lua_setfield(L, -2, "luaentities");
lua_setglobal(L, "minetest");
// Initialize our lua_api modules
lua_getglobal(L, "minetest");
int top = lua_gettop(L);
InitializeModApi(L, top);
lua_pop(L, 1);
infostream << "SCRIPTAPI: initialized game modules" << std::endl;
infostream << "SCRIPTAPI: Initialized game modules" << std::endl;
}
void GameScripting::InitializeModApi(lua_State *L, int top)

32
src/script/scripting_mainmenu.cpp
View File

@ -28,9 +28,11 @@ with this program; if not, write to the Free Software Foundation, Inc.,
extern "C" {
#include "lualib.h"
int luaopen_marshal(lua_State *L);
}
/******************************************************************************/
#define MAINMENU_ASYNC_THREADS 4
MainMenuScripting::MainMenuScripting(GUIEngine* guiengine)
{
setGuiEngine(guiengine);
@ -38,32 +40,31 @@ MainMenuScripting::MainMenuScripting(GUIEngine* guiengine)
//TODO add security
luaL_openlibs(getStack());
luaopen_marshal(getStack());
SCRIPTAPI_PRECHECKHEADER
lua_newtable(L);
lua_setglobal(L, "engine");
lua_getglobal(L, "engine");
int top = lua_gettop(L);
lua_pushstring(L, DIR_DELIM);
lua_setglobal(L, "DIR_DELIM");
lua_newtable(L);
lua_setglobal(L, "gamedata");
lua_newtable(L);
lua_setglobal(L, "engine");
// Initialize our lua_api modules
lua_getglobal(L, "engine");
int top = lua_gettop(L);
InitializeModApi(L, top);
lua_pop(L, 1);
infostream << "SCRIPTAPI: initialized mainmenu modules" << std::endl;
infostream << "SCRIPTAPI: Initialized main menu modules" << std::endl;
}
/******************************************************************************/
void MainMenuScripting::InitializeModApi(lua_State *L, int top)
{
// Initialize mod api modules
// Initialize mod API modules
ModApiMainMenu::Initialize(L, top);
ModApiUtil::Initialize(L, top);
@ -76,16 +77,17 @@ void MainMenuScripting::InitializeModApi(lua_State *L, int top)
// Initialize async environment
//TODO possibly make number of async threads configurable
m_AsyncEngine.Initialize(MAINMENU_NUMBER_OF_ASYNC_THREADS);
m_AsyncEngine.Initialize(MAINMENU_ASYNC_THREADS);
}
/******************************************************************************/
void MainMenuScripting::Step() {
m_AsyncEngine.Step(getStack());
m_AsyncEngine.Step(getStack(), m_errorhandler);
}
/******************************************************************************/
unsigned int MainMenuScripting::DoAsync(std::string serialized_fct,
std::string serialized_params) {
return m_AsyncEngine.doAsyncJob(serialized_fct,serialized_params);
unsigned int MainMenuScripting::DoAsync(std::string serialized_func,
std::string serialized_param) {
return m_AsyncEngine.doAsyncJob(serialized_func, serialized_param);
}

11
src/script/scripting_mainmenu.h
View File

@ -22,7 +22,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "cpp_api/s_base.h"
#include "cpp_api/s_mainmenu.h"
#include "lua_api/l_async_events.h"
#include "cpp_api/s_async.h"
/*****************************************************************************/
/* Scripting <-> Main Menu Interface */
@ -35,14 +35,11 @@ class MainMenuScripting
public:
MainMenuScripting(GUIEngine* guiengine);
// use ScriptApiBase::loadMod() or ScriptApiBase::loadScript()
// to load scripts
/* global step handler to pass back async events */
// Global step handler to pass back async events
void Step();
/* pass async events from engine to async threads */
unsigned int DoAsync(std::string serialized_fct,
// Pass async events from engine to async threads
unsigned int DoAsync(std::string serialized_func,
std::string serialized_params);
private:
void InitializeModApi(lua_State *L, int top);