mirror of
https://github.com/kasmtech/KasmVNC.git
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166 lines
3.2 KiB
C++
166 lines
3.2 KiB
C++
/* Copyright 2015 Pierre Ossman for Cendio AB
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#ifdef WIN32
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#include <windows.h>
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#else
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#include <pthread.h>
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#include <signal.h>
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#include <unistd.h>
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#endif
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#include <rdr/Exception.h>
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#include <os/Mutex.h>
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#include <os/Thread.h>
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using namespace os;
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Thread::Thread() : running(false), threadId(NULL)
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{
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mutex = new Mutex;
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#ifdef WIN32
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threadId = new HANDLE;
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#else
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threadId = new pthread_t;
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#endif
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}
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Thread::~Thread()
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{
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#ifdef WIN32
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delete (HANDLE*)threadId;
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#else
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if (isRunning())
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pthread_cancel(*(pthread_t*)threadId);
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delete (pthread_t*)threadId;
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#endif
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delete mutex;
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}
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void Thread::start()
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{
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AutoMutex a(mutex);
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#ifdef WIN32
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*(HANDLE*)threadId = CreateThread(NULL, 0, startRoutine, this, 0, NULL);
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if (*(HANDLE*)threadId == NULL)
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throw rdr::SystemException("Failed to create thread", GetLastError());
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#else
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int ret;
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sigset_t all, old;
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// Creating threads from libraries is a bit evil, so mitigate the
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// issue by at least avoiding signals on these threads
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sigfillset(&all);
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ret = pthread_sigmask(SIG_SETMASK, &all, &old);
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if (ret != 0)
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throw rdr::SystemException("Failed to mask signals", ret);
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ret = pthread_create((pthread_t*)threadId, NULL, startRoutine, this);
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pthread_sigmask(SIG_SETMASK, &old, NULL);
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if (ret != 0)
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throw rdr::SystemException("Failed to create thread", ret);
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#endif
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running = true;
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}
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void Thread::wait()
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{
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if (!isRunning())
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return;
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#ifdef WIN32
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DWORD ret;
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ret = WaitForSingleObject(*(HANDLE*)threadId, INFINITE);
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if (ret != WAIT_OBJECT_0)
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throw rdr::SystemException("Failed to join thread", GetLastError());
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#else
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int ret;
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ret = pthread_join(*(pthread_t*)threadId, NULL);
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if (ret != 0)
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throw rdr::SystemException("Failed to join thread", ret);
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#endif
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}
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bool Thread::isRunning()
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{
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AutoMutex a(mutex);
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return running;
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}
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size_t Thread::getSystemCPUCount()
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{
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#ifdef WIN32
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SYSTEM_INFO si;
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size_t count;
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DWORD mask;
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GetSystemInfo(&si);
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count = 0;
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for (mask = si.dwActiveProcessorMask;mask != 0;mask >>= 1) {
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if (mask & 0x1)
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count++;
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}
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if (count > si.dwNumberOfProcessors)
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count = si.dwNumberOfProcessors;
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return count;
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#else
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long ret;
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ret = sysconf(_SC_NPROCESSORS_ONLN);
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if (ret == -1)
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return 0;
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return ret;
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#endif
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}
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#ifdef WIN32
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long unsigned __stdcall Thread::startRoutine(void* data)
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#else
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void* Thread::startRoutine(void* data)
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#endif
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{
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Thread *self;
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self = (Thread*)data;
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try {
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self->worker();
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} catch(...) {
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}
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self->mutex->lock();
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self->running = false;
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self->mutex->unlock();
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return 0;
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}
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