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[WIP] -netthread fixes and implementation for linux #569

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[WIP] -netthread fixes and implementation for linux #569

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2 changes: 1 addition & 1 deletion rehlds/build.gradle
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Original file line number Diff line number Diff line change
Expand Up @@ -176,7 +176,7 @@ void setupToolchain(NativeBinarySpec b) {
cfg.linkerOptions.args '-Wl,--version-script=../version_script.lds', '-Wl,--gc-sections'

cfg.projectLibpath(project, '/lib/linux32')
cfg.extraLibs 'rt', 'dl', 'm', 'steam_api', 'aelf32'
cfg.extraLibs 'rt', 'dl', 'm', 'steam_api', 'aelf32', 'pthread'
}

if (unitTestExecutable) {
Expand Down
92 changes: 81 additions & 11 deletions rehlds/engine/net_ws.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -71,6 +71,13 @@ net_messages_t *normalqueue;
HANDLE hNetThread;
DWORD dwNetThreadId;
CRITICAL_SECTION net_cs;
#else
pthread_mutex_t net_mutex;
pthread_t hNetThread;
#endif

#ifdef REHLDS_FIXES
volatile bool net_thread_terminated;
#endif

cvar_t net_address = { "net_address", "", 0, 0.0f, NULL };
Expand Down Expand Up @@ -100,22 +107,26 @@ cvar_t net_graphpos = { "net_graphpos", "1", FCVAR_ARCHIVE, 0.0f, NULL };

void NET_ThreadLock()
{
#ifdef _WIN32
if (use_thread && net_thread_initialized)
{
#ifdef _WIN32
EnterCriticalSection(&net_cs);
}
#else
pthread_mutex_lock(&net_mutex);
#endif // _WIN32
}
}

void NET_ThreadUnlock()
{
#ifdef _WIN32
if (use_thread && net_thread_initialized)
{
#ifdef _WIN32
LeaveCriticalSection(&net_cs);
}
#else
pthread_mutex_unlock(&net_mutex);
#endif // _WIN32
}
}

unsigned short Q_ntohs(unsigned short netshort)
Expand Down Expand Up @@ -1112,14 +1123,20 @@ int NET_Sleep()
}

tv.tv_sec = 0;
#ifdef REHLDS_FIXES
tv.tv_usec = 0.25 * 1000000;
#else
tv.tv_usec = 20 * 1000;
#endif

return select((int)(number + 1), &fdset, NULL, NULL, net_sleepforever == 0 ? &tv : NULL);
}

#ifdef _WIN32

DWORD WINAPI NET_ThreadMain(LPVOID lpThreadParameter)
#else
void* NET_ThreadMain(void*)
#endif // _WIN32
{
while (true)
{
Expand All @@ -1130,6 +1147,14 @@ DWORD WINAPI NET_ThreadMain(LPVOID lpThreadParameter)
{
NET_ThreadLock();

#ifdef REHLDS_FIXES
if (net_thread_terminated)
{
NET_ThreadUnlock();
return 0;
}
#endif

bret = NET_QueuePacket((netsrc_t)sock);
if (bret)
{
Expand Down Expand Up @@ -1161,33 +1186,45 @@ DWORD WINAPI NET_ThreadMain(LPVOID lpThreadParameter)
break;
}

#ifndef REHLDS_FIXES
Sys_Sleep(1);
#endif
}

return 0;
}

#endif // _WIN32

void NET_StartThread()
{
if (use_thread)
{
if (!net_thread_initialized)
{
net_thread_initialized = TRUE;
#ifdef REHLDS_FIXES
net_thread_terminated = false;
#endif

#ifdef _WIN32
InitializeCriticalSection(&net_cs);
hNetThread = CreateThread(0, 0, NET_ThreadMain, 0, 0, &dwNetThreadId);
if (!hNetThread)
{
DeleteCriticalSection(&net_cs);
#else
// In-line: There are several cases where mutex can go recursive in one thread.
pthread_mutexattr_t net_mutex_attr;
pthread_mutexattr_init(&net_mutex_attr);
pthread_mutexattr_settype(&net_mutex_attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&net_mutex, &net_mutex_attr);
if (pthread_create(&hNetThread, nullptr, &NET_ThreadMain, nullptr) != 0)
{
pthread_mutex_destroy(&net_mutex);
#endif
net_thread_initialized = FALSE;
use_thread = FALSE;
Sys_Error("%s: Couldn't initialize network thread, run without -netthread\n", __func__);
}
#endif // _WIN32
Con_Printf("Network thread was initialized\n");
}
}
}
Expand All @@ -1198,11 +1235,38 @@ void NET_StopThread()
{
if (net_thread_initialized)
{
#ifdef REHLDS_FIXES // Safe thread stopping.
NET_ThreadLock();
net_thread_terminated = true;
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You don't need lock here.

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@theAsmodai what's the reason? x86?

NET_ThreadUnlock();
#endif // REHLDS_FIXES

#ifdef _WIN32
TerminateThread(hNetThread, 0);

#ifdef REHLDS_FIXES
if (WaitForSingleObject(hNetThread, 0.5 * 1000) != WAIT_OBJECT_0) // Wait 0.5 second for thread to finish
#endif // REHLDS_FIXES
{
TerminateThread(hNetThread, 0); // Kill unresponsive thread.
}
DeleteCriticalSection(&net_cs);

#else // _WIN32
struct timespec ts;
if (clock_gettime(CLOCK_REALTIME, &ts) == -1) {
Sys_Error("%s: CLOCK_REALTIME ERROR: %s", __func__, NET_ErrorString(NET_GetLastError()));
}
ts.tv_nsec += 0.5 * 1000000000; // Wait 0.5 second for thread to finish

if (pthread_timedjoin_np(hNetThread, nullptr, &ts) != 0)
{
pthread_cancel(hNetThread); // Kill unresponsive thread.
pthread_join(hNetThread, nullptr);
}
pthread_mutex_destroy(&net_mutex);
#endif // _WIN32
net_thread_initialized = FALSE;
Con_Printf("Network thread was terminated\n");
}
}
}
Expand Down Expand Up @@ -2013,9 +2077,15 @@ void NET_Init()
Cvar_RegisterVariable(&net_graphpos);

if (COM_CheckParm("-netthread"))
#if defined(REHLDS_FIXES) || defined(_WIN32) // -netthread will work either on windows or on fixed linux build.
use_thread = TRUE;
#else
use_thread = FALSE;
#endif

if (COM_CheckParm("-netsleep"))
#ifndef REHLDS_FIXES
if (COM_CheckParm("-netsleep")) // Sleeping forever is useless.
#endif
net_sleepforever = 0;

#ifdef _WIN32
Expand Down
1 change: 1 addition & 0 deletions rehlds/public/rehlds/osconfig.h
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Original file line number Diff line number Diff line change
Expand Up @@ -80,6 +80,7 @@
#include <sys/types.h>
#include <sys/sysinfo.h>
#include <unistd.h>
#include <pthread.h>
#endif // _WIN32

#include <string>
Expand Down