3 Copyright (C) 2013 sapier, <sapier AT gmx DOT net>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
34 #include "common/c_internal.h"
36 /******************************************************************************/
37 AsyncEngine::AsyncEngine() :
43 /******************************************************************************/
44 AsyncEngine::~AsyncEngine()
47 // Request all threads to stop
48 for (std::vector<AsyncWorkerThread *>::iterator it = workerThreads.begin();
49 it != workerThreads.end(); it++) {
54 // Wake up all threads
55 for (std::vector<AsyncWorkerThread *>::iterator it = workerThreads.begin();
56 it != workerThreads.end(); it++) {
57 jobQueueCounter.post();
60 // Wait for threads to finish
61 for (std::vector<AsyncWorkerThread *>::iterator it = workerThreads.begin();
62 it != workerThreads.end(); it++) {
66 // Force kill all threads
67 for (std::vector<AsyncWorkerThread *>::iterator it = workerThreads.begin();
68 it != workerThreads.end(); it++) {
74 jobQueueMutex.unlock();
75 workerThreads.clear();
78 /******************************************************************************/
79 bool AsyncEngine::registerFunction(const char* name, lua_CFunction func)
84 functionList[name] = func;
88 /******************************************************************************/
89 void AsyncEngine::initialize(unsigned int numEngines)
93 for (unsigned int i = 0; i < numEngines; i++) {
94 AsyncWorkerThread *toAdd = new AsyncWorkerThread(this,
95 std::string("AsyncWorker-") + itos(i));
96 workerThreads.push_back(toAdd);
101 /******************************************************************************/
102 unsigned int AsyncEngine::queueAsyncJob(std::string func, std::string params)
104 jobQueueMutex.lock();
106 toAdd.id = jobIdCounter++;
107 toAdd.serializedFunction = func;
108 toAdd.serializedParams = params;
110 jobQueue.push_back(toAdd);
112 jobQueueCounter.post();
114 jobQueueMutex.unlock();
119 /******************************************************************************/
120 LuaJobInfo AsyncEngine::getJob()
122 jobQueueCounter.wait();
123 jobQueueMutex.lock();
126 retval.valid = false;
128 if (!jobQueue.empty()) {
129 retval = jobQueue.front();
130 jobQueue.pop_front();
133 jobQueueMutex.unlock();
138 /******************************************************************************/
139 void AsyncEngine::putJobResult(LuaJobInfo result)
141 resultQueueMutex.lock();
142 resultQueue.push_back(result);
143 resultQueueMutex.unlock();
146 /******************************************************************************/
147 void AsyncEngine::step(lua_State *L)
149 int error_handler = PUSH_ERROR_HANDLER(L);
150 lua_getglobal(L, "core");
151 resultQueueMutex.lock();
152 while (!resultQueue.empty()) {
153 LuaJobInfo jobDone = resultQueue.front();
154 resultQueue.pop_front();
156 lua_getfield(L, -1, "async_event_handler");
158 if (lua_isnil(L, -1)) {
159 FATAL_ERROR("Async event handler does not exist!");
162 luaL_checktype(L, -1, LUA_TFUNCTION);
164 lua_pushinteger(L, jobDone.id);
165 lua_pushlstring(L, jobDone.serializedResult.data(),
166 jobDone.serializedResult.size());
168 PCALL_RESL(L, lua_pcall(L, 2, 0, error_handler));
170 resultQueueMutex.unlock();
171 lua_pop(L, 2); // Pop core and error handler
174 /******************************************************************************/
175 void AsyncEngine::pushFinishedJobs(lua_State* L) {
177 MutexAutoLock l(resultQueueMutex);
179 unsigned int index = 1;
180 lua_createtable(L, resultQueue.size(), 0);
181 int top = lua_gettop(L);
183 while (!resultQueue.empty()) {
184 LuaJobInfo jobDone = resultQueue.front();
185 resultQueue.pop_front();
187 lua_createtable(L, 0, 2); // Pre-allocate space for two map fields
188 int top_lvl2 = lua_gettop(L);
190 lua_pushstring(L, "jobid");
191 lua_pushnumber(L, jobDone.id);
192 lua_settable(L, top_lvl2);
194 lua_pushstring(L, "retval");
195 lua_pushlstring(L, jobDone.serializedResult.data(),
196 jobDone.serializedResult.size());
197 lua_settable(L, top_lvl2);
199 lua_rawseti(L, top, index++);
203 /******************************************************************************/
204 void AsyncEngine::prepareEnvironment(lua_State* L, int top)
206 for (std::map<std::string, lua_CFunction>::iterator it = functionList.begin();
207 it != functionList.end(); it++) {
208 lua_pushstring(L, it->first.c_str());
209 lua_pushcfunction(L, it->second);
210 lua_settable(L, top);
214 /******************************************************************************/
215 AsyncWorkerThread::AsyncWorkerThread(AsyncEngine* jobDispatcher,
216 const std::string &name) :
219 jobDispatcher(jobDispatcher)
221 lua_State *L = getStack();
223 // Prepare job lua environment
224 lua_getglobal(L, "core");
225 int top = lua_gettop(L);
227 // Push builtin initialization type
228 lua_pushstring(L, "async");
229 lua_setglobal(L, "INIT");
231 jobDispatcher->prepareEnvironment(L, top);
234 /******************************************************************************/
235 AsyncWorkerThread::~AsyncWorkerThread()
237 sanity_check(!isRunning());
240 /******************************************************************************/
241 void* AsyncWorkerThread::run()
243 lua_State *L = getStack();
245 std::string script = getServer()->getBuiltinLuaPath() + DIR_DELIM + "init.lua";
246 if (!loadScript(script)) {
247 FATAL_ERROR("execution of async base environment failed!");
250 int error_handler = PUSH_ERROR_HANDLER(L);
252 lua_getglobal(L, "core");
253 if (lua_isnil(L, -1)) {
254 FATAL_ERROR("Unable to find core within async environment!");
258 while (!stopRequested()) {
260 LuaJobInfo toProcess = jobDispatcher->getJob();
262 if (toProcess.valid == false || stopRequested()) {
266 lua_getfield(L, -1, "job_processor");
267 if (lua_isnil(L, -1)) {
268 FATAL_ERROR("Unable to get async job processor!");
271 luaL_checktype(L, -1, LUA_TFUNCTION);
275 toProcess.serializedFunction.data(),
276 toProcess.serializedFunction.size());
278 toProcess.serializedParams.data(),
279 toProcess.serializedParams.size());
281 int result = lua_pcall(L, 2, 1, error_handler);
284 toProcess.serializedResult = "";
288 const char *retval = lua_tolstring(L, -1, &length);
289 toProcess.serializedResult = std::string(retval, length);
292 lua_pop(L, 1); // Pop retval
295 jobDispatcher->putJobResult(toProcess);
298 lua_pop(L, 2); // Pop core and error handler