Test_Project_Cocos/DelayNoMore
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Enhanced UDP session resource management.

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This commit is contained in:
genxium 2023-02-21 15:21:15 +08:00
parent b50874f5c4
commit c78c480f99
1 changed files with 41 additions and 20 deletions
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35
frontend/build-templates/jsb-link/frameworks/runtime-src/Classes/udp_session.cpp
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@ -160,7 +160,6 @@ void startRecvLoop(void* arg) {
int uvCloseRet = uv_loop_close(l);
CCLOG("UDP recv loop is closed in UvRecvThread, uvCloseRet=%d", uvCloseRet);
uv_mutex_destroy(&recvRingBuffLock);
}
void startSendLoop(void* arg) {
@ -174,7 +173,6 @@ void startSendLoop(void* arg) {
int uvCloseRet = uv_loop_close(l);
CCLOG("UDP send loop is closed in UvSendThread, uvCloseRet=%d", uvCloseRet);
uv_mutex_destroy(&sendRingBuffLock);
}
int initSendLoop(struct sockaddr const* pUdpAddr) {
@ -189,9 +187,6 @@ int initSendLoop(struct sockaddr const* pUdpAddr) {
uv_mutex_init(&sendRingBuffLock);
sendRingBuff = new SendRingBuff(maxBuffedMsgs);
uv_mutex_init(&recvRingBuffLock);
recvRingBuff = new RecvRingBuff(maxBuffedMsgs);
uv_async_init(sendLoop, &uvSendLoopStopSig, _onUvStopSig);
uv_async_init(sendLoop, &uvSendLoopTriggerSig, _onUvSthNewToSend);
@ -208,6 +203,9 @@ bool initRecvLoop(struct sockaddr const* pUdpAddr) {
CCLOGERROR("Failed to bind recv; recvSockInitRes=%d, recvbindRes=%d, reason=%s", recvSockInitRes, recvbindRes, uv_strerror(recvbindRes));
exit(-1);
}
uv_mutex_init(&recvRingBuffLock);
recvRingBuff = new RecvRingBuff(maxBuffedMsgs);
uv_udp_recv_start(udpRecvSocket, _allocBuffer, _onRead);
uv_async_init(recvLoop, &uvRecvLoopStopSig, _onUvStopSig);
@ -249,6 +247,12 @@ bool DelayNoMore::UdpSession::openUdpSession(int port) {
bool DelayNoMore::UdpSession::closeUdpSession() {
CCLOG("About to close udp session and dealloc all resources...");
/*
[WARNING] It's possible that "closeUdpSession" is called when "openUdpSession" was NEVER CALLED, thus we have to avoid program crash in this case.
In general one shouldn't just check the state of "sendTid" by whether or not "NULL == sendLoop", but in this particular game, both "openUdpSession" and "closeUdpSession" are only called from "GameThread", no thread-safety concern here, i.e. if "openUdpSession" was ever called earlier, then "sendLoop" wouldn't be NULL when "closeUdpSession" is later called.
*/
if (NULL != sendLoop) {
uv_async_send(&uvSendLoopStopSig);
CCLOG("Signaling UvSendThread to end in GameThread...");
uv_thread_join(&sendTid);
@ -256,6 +260,14 @@ bool DelayNoMore::UdpSession::closeUdpSession() {
free(sendLoop);
delete sendRingBuff;
udpSendSocket = NULL;
sendLoop = NULL;
sendRingBuff = NULL;
uv_mutex_destroy(&sendRingBuffLock);
}
if (NULL != recvLoop) {
uv_async_send(&uvRecvLoopStopSig); // The few if not only guaranteed thread safe utility of libuv :) See http://docs.libuv.org/en/v1.x/async.html#c.uv_async_send
CCLOG("Signaling UvRecvThread to end in GameThread...");
uv_thread_join(&recvTid);
@ -263,6 +275,13 @@ bool DelayNoMore::UdpSession::closeUdpSession() {
free(recvLoop);
delete recvRingBuff;
udpRecvSocket = NULL;
recvLoop = NULL;
recvRingBuff = NULL;
uv_mutex_destroy(&recvRingBuffLock);
}
CCLOG("Closed udp session and dealloc all resources in GameThread...");
return true;
@ -356,8 +375,10 @@ bool DelayNoMore::UdpSession::pollUdpRecvRingBuff() {
while (true) {
RecvWork f;
bool res = recvRingBuff->pop(&f);
if (!res) return false;
if (!res) {
// Deliberately returning "true" here to prevent "jswrapper" from printing "Failed to invoke Xxx..." too frequently
return true;
}
// [WARNING] Declaring "AutoHandleScope" is critical here, otherwise "onUdpMessageCb.toObject()" wouldn't be recognized as a function of the ScriptEngine!
se::AutoHandleScope hs;
// [WARNING] Use of the "ScriptEngine" is only allowed in "GameThread a.k.a. CocosThread"!