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/* Copyright 2015 Pierre Ossman for Cendio AB
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef WIN32
#include <windows.h>
#else
#include <pthread.h>
#include <signal.h>
#include <unistd.h>
#endif
#include <rdr/Exception.h>
#include <os/Mutex.h>
#include <os/Thread.h>
using namespace os;
Thread::Thread() : running(false), threadId(nullptr)
{
mutex = new Mutex;
#ifdef WIN32
threadId = new HANDLE;
#else
threadId = new pthread_t;
#endif
}
Thread::~Thread()
{
#ifdef WIN32
delete (HANDLE*)threadId;
#else
if (isRunning())
pthread_cancel(*(pthread_t*)threadId);
delete (pthread_t*)threadId;
#endif
delete mutex;
}
void Thread::start()
{
AutoMutex a(mutex);
#ifdef WIN32
*(HANDLE*)threadId = CreateThread(nullptr, 0, startRoutine, this, 0, nullptr);
if (*(HANDLE*)threadId == nullptr)
throw rdr::win32_error("Failed to create thread", GetLastError());
#else
int ret;
sigset_t all, old;
// Creating threads from libraries is a bit evil, so mitigate the
// issue by at least avoiding signals on these threads
sigfillset(&all);
ret = pthread_sigmask(SIG_SETMASK, &all, &old);
if (ret != 0)
throw rdr::posix_error("Failed to mask signals", ret);
ret = pthread_create((pthread_t*)threadId, nullptr, startRoutine, this);
pthread_sigmask(SIG_SETMASK, &old, nullptr);
if (ret != 0)
throw rdr::posix_error("Failed to create thread", ret);
#endif
running = true;
}
void Thread::wait()
{
if (!isRunning())
return;
#ifdef WIN32
DWORD ret;
ret = WaitForSingleObject(*(HANDLE*)threadId, INFINITE);
if (ret != WAIT_OBJECT_0)
throw rdr::win32_error("Failed to join thread", GetLastError());
#else
int ret;
ret = pthread_join(*(pthread_t*)threadId, nullptr);
if (ret != 0)
throw rdr::posix_error("Failed to join thread", ret);
#endif
}
bool Thread::isRunning()
{
AutoMutex a(mutex);
return running;
}
size_t Thread::getSystemCPUCount()
{
#ifdef WIN32
SYSTEM_INFO si;
size_t count;
DWORD mask;
GetSystemInfo(&si);
count = 0;
for (mask = si.dwActiveProcessorMask;mask != 0;mask >>= 1) {
if (mask & 0x1)
count++;
}
if (count > si.dwNumberOfProcessors)
count = si.dwNumberOfProcessors;
return count;
#else
long ret;
ret = sysconf(_SC_NPROCESSORS_ONLN);
if (ret == -1)
return 0;
return ret;
#endif
}
#ifdef WIN32
long unsigned __stdcall Thread::startRoutine(void* data)
#else
void* Thread::startRoutine(void* data)
#endif
{
Thread *self;
self = (Thread*)data;
try {
self->worker();
} catch(...) {
}
self->mutex->lock();
self->running = false;
self->mutex->unlock();
#ifdef WIN32
return 0;
#else
return nullptr;
#endif
}
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