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Thread_POSIX.cpp
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Thread_POSIX.cpp
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//
// Thread_POSIX.cpp
//
// Library: Foundation
// Package: Threading
// Module: Thread
//
// Copyright (c) 2004-2007, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Thread_POSIX.h"
#include "Poco/Thread.h"
#include "Poco/Exception.h"
#include "Poco/Error.h"
#include "Poco/ErrorHandler.h"
#include "Poco/Timespan.h"
#include "Poco/Timestamp.h"
#include "Poco/Format.h"
#include <signal.h>
#if POCO_OS == POCO_OS_FREE_BSD
# include <sys/thr.h>
# include <pthread_np.h>
# include <osreldate.h>
#endif
#if defined(__sun) && defined(__SVR4)
# if !defined(__EXTENSIONS__)
# define __EXTENSIONS__
# endif
#endif
#if POCO_OS == POCO_OS_LINUX || POCO_OS == POCO_OS_ANDROID || POCO_OS == POCO_OS_MAC_OS_X || POCO_OS == POCO_OS_QNX
# include <time.h>
#endif
#if POCO_OS == POCO_OS_LINUX || POCO_OS == POCO_OS_ANDROID || POCO_OS == POCO_OS_FREE_BSD
# include <sys/prctl.h>
#endif
#if POCO_OS == POCO_OS_LINUX
#ifndef _GNU_SOURCE
#define _GNU_SOURCE /* See feature_test_macros(7) */
#endif
#include <unistd.h>
#include <sys/syscall.h> /* For SYS_xxx definitions */
#endif
#include <iostream>
//
// Block SIGPIPE in main thread.
//
#if defined(POCO_OS_FAMILY_UNIX) && !defined(POCO_VXWORKS)
namespace
{
class SignalBlocker
{
public:
SignalBlocker()
{
sigset_t sset;
sigemptyset(&sset);
sigaddset(&sset, SIGPIPE);
pthread_sigmask(SIG_BLOCK, &sset, 0);
}
~SignalBlocker()
{
}
};
static SignalBlocker signalBlocker;
}
#endif
namespace
{
void setThreadName(const std::string& threadName)
{
#if POCO_OS == POCO_OS_FREE_BSD && __FreeBSD_version < 1300000
pthread_set_name_np(pthread_self(), threadName.c_str());
return;
#elif (POCO_OS == POCO_OS_MAC_OS_X)
if (pthread_setname_np(threadName.c_str()))
#else
if (prctl(PR_SET_NAME, threadName.c_str()))
#endif
throw Poco::SystemException("cannot set thread name");
}
std::string getThreadName()
{
char name[POCO_MAX_THREAD_NAME_LEN + 1]{'\0'};
#if POCO_OS == POCO_OS_LINUX || POCO_OS == POCO_OS_ANDROID || POCO_OS == POCO_OS_FREE_BSD
if (prctl(PR_GET_NAME, name))
throw Poco::SystemException("cannot get thread name");
#else
if (pthread_getname_np(pthread_self(), name, POCO_MAX_THREAD_NAME_LEN + 1))
throw Poco::SystemException("cannot get thread name");
#endif
return name;
}
}
namespace Poco {
ThreadImpl::CurrentThreadHolder ThreadImpl::_currentThreadHolder;
ThreadImpl::ThreadImpl():
_pData(new ThreadData)
{
}
ThreadImpl::~ThreadImpl()
{
if (_pData->started && !_pData->joined)
{
pthread_detach(_pData->thread);
}
}
void ThreadImpl::setNameImpl(const std::string& threadName)
{
std::string realName = threadName;
#if (POCO_OS == POCO_OS_MAC_OS_X)
if (threadName.size() > POCO_MAX_THREAD_NAME_LEN)
{
int half = (POCO_MAX_THREAD_NAME_LEN - 1) / 2;
#else
if (threadName.size() > std::min(POCO_MAX_THREAD_NAME_LEN, 15))
{
int half = (std::min(POCO_MAX_THREAD_NAME_LEN, 15) - 1) / 2;
#endif
std::string truncName(threadName, 0, half);
truncName.append("~");
truncName.append(threadName, threadName.size() - half);
realName = truncName;
}
ScopedLock<FastMutex> lock(_pData->mutex);
if (realName != _pData->name)
{
_pData->name = realName;
}
}
std::string ThreadImpl::getNameImpl() const
{
ScopedLock<FastMutex> lock(_pData->mutex);
return _pData->name;
}
std::string ThreadImpl::getOSThreadNameImpl()
{
return isRunningImpl() ? getThreadName() : "";
}
void ThreadImpl::setPriorityImpl(int prio)
{
if (prio != _pData->prio)
{
_pData->prio = prio;
_pData->policy = SCHED_OTHER;
if (isRunningImpl())
{
struct sched_param par;
par.sched_priority = mapPrio(_pData->prio, SCHED_OTHER);
if (pthread_setschedparam(_pData->thread, SCHED_OTHER, &par))
throw SystemException("cannot set thread priority");
}
}
}
void ThreadImpl::setOSPriorityImpl(int prio, int policy)
{
if (prio != _pData->osPrio || policy != _pData->policy)
{
if (_pData->pRunnableTarget)
{
struct sched_param par;
par.sched_priority = prio;
if (pthread_setschedparam(_pData->thread, policy, &par))
throw SystemException("cannot set thread priority");
}
_pData->prio = reverseMapPrio(prio, policy);
_pData->osPrio = prio;
_pData->policy = policy;
}
}
int ThreadImpl::getMinOSPriorityImpl(int policy)
{
#if defined(POCO_THREAD_PRIORITY_MIN)
return POCO_THREAD_PRIORITY_MIN;
#elif defined(__digital__)
return PRI_OTHER_MIN;
#else
return sched_get_priority_min(policy);
#endif
}
int ThreadImpl::getMaxOSPriorityImpl(int policy)
{
#if defined(POCO_THREAD_PRIORITY_MAX)
return POCO_THREAD_PRIORITY_MAX;
#elif defined(__digital__)
return PRI_OTHER_MAX;
#else
return sched_get_priority_max(policy);
#endif
}
void ThreadImpl::setStackSizeImpl(int size)
{
#ifndef PTHREAD_STACK_MIN
_pData->stackSize = 0;
#else
if (size != 0)
{
#if defined(POCO_OS_FAMILY_BSD)
// we must round up to a multiple of the memory page size
const int STACK_PAGE_SIZE = 4096;
size = ((size + STACK_PAGE_SIZE - 1)/STACK_PAGE_SIZE)*STACK_PAGE_SIZE;
#endif
if (size < PTHREAD_STACK_MIN)
size = PTHREAD_STACK_MIN;
}
_pData->stackSize = size;
#endif
}
void ThreadImpl::startImpl(SharedPtr<Runnable> pTarget)
{
{
FastMutex::ScopedLock l(_pData->mutex);
if (_pData->pRunnableTarget)
throw SystemException("thread already running");
}
pthread_attr_t attributes;
pthread_attr_init(&attributes);
if (_pData->stackSize != 0)
{
if (0 != pthread_attr_setstacksize(&attributes, _pData->stackSize))
{
pthread_attr_destroy(&attributes);
throw SystemException("cannot set thread stack size");
}
}
{
FastMutex::ScopedLock l(_pData->mutex);
_pData->pRunnableTarget = pTarget;
if (pthread_create(&_pData->thread, &attributes, runnableEntry, this))
{
_pData->pRunnableTarget = 0;
pthread_attr_destroy(&attributes);
throw SystemException("cannot start thread");
}
}
_pData->started = true;
pthread_attr_destroy(&attributes);
if (_pData->policy == SCHED_OTHER)
{
if (_pData->prio != PRIO_NORMAL_IMPL)
{
struct sched_param par;
par.sched_priority = mapPrio(_pData->prio, SCHED_OTHER);
if (pthread_setschedparam(_pData->thread, SCHED_OTHER, &par))
throw SystemException("cannot set thread priority");
}
}
else
{
struct sched_param par;
par.sched_priority = _pData->osPrio;
if (pthread_setschedparam(_pData->thread, _pData->policy, &par))
throw SystemException("cannot set thread priority");
}
}
void ThreadImpl::joinImpl()
{
if (!_pData->started) return;
_pData->done.wait();
void* result;
if (pthread_join(_pData->thread, &result))
throw SystemException("cannot join thread");
_pData->joined = true;
}
bool ThreadImpl::joinImpl(long milliseconds)
{
if (_pData->started && _pData->done.tryWait(milliseconds))
{
void* result;
if (pthread_join(_pData->thread, &result))
throw SystemException("cannot join thread");
_pData->joined = true;
return true;
}
else if (_pData->started) return false;
else return true;
}
ThreadImpl* ThreadImpl::currentImpl()
{
return _currentThreadHolder.get();
}
ThreadImpl::TIDImpl ThreadImpl::currentTidImpl()
{
return pthread_self();
}
long ThreadImpl::currentOsTidImpl()
{
#if POCO_OS == POCO_OS_LINUX
return ::syscall(SYS_gettid);
#elif POCO_OS == POCO_OS_MAC_OS_X
return ::pthread_mach_thread_np(::pthread_self());
#elif POCO_OS == POCO_OS_FREE_BSD
long id;
if(thr_self(&id) < 0) {
return 0;
}
return id;
#else
return ::pthread_self();
#endif
}
void* ThreadImpl::runnableEntry(void* pThread)
{
_currentThreadHolder.set(reinterpret_cast<ThreadImpl*>(pThread));
#if defined(POCO_OS_FAMILY_UNIX)
sigset_t sset;
sigemptyset(&sset);
sigaddset(&sset, SIGQUIT);
sigaddset(&sset, SIGTERM);
sigaddset(&sset, SIGPIPE);
pthread_sigmask(SIG_BLOCK, &sset, 0);
#endif
auto* pThreadImpl = reinterpret_cast<ThreadImpl*>(pThread);
AutoPtr<ThreadData> pData = pThreadImpl->_pData;
{
FastMutex::ScopedLock lock(pData->mutex);
setThreadName(pData->name);
}
try
{
pData->pRunnableTarget->run();
}
catch (Exception& exc)
{
ErrorHandler::handle(exc);
}
catch (std::exception& exc)
{
ErrorHandler::handle(exc);
}
catch (...)
{
ErrorHandler::handle();
}
FastMutex::ScopedLock l(pData->mutex);
pData->pRunnableTarget = 0;
pData->done.set();
return 0;
}
int ThreadImpl::mapPrio(int prio, int policy)
{
int pmin = getMinOSPriorityImpl(policy);
int pmax = getMaxOSPriorityImpl(policy);
switch (prio)
{
case PRIO_LOWEST_IMPL:
return pmin;
case PRIO_LOW_IMPL:
return pmin + (pmax - pmin)/4;
case PRIO_NORMAL_IMPL:
return pmin + (pmax - pmin)/2;
case PRIO_HIGH_IMPL:
return pmin + 3*(pmax - pmin)/4;
case PRIO_HIGHEST_IMPL:
return pmax;
default:
poco_bugcheck_msg("invalid thread priority");
}
return -1; // just to satisfy compiler - we'll never get here anyway
}
int ThreadImpl::reverseMapPrio(int prio, int policy)
{
if (policy == SCHED_OTHER)
{
int pmin = getMinOSPriorityImpl(policy);
int pmax = getMaxOSPriorityImpl(policy);
int normal = pmin + (pmax - pmin)/2;
if (prio == pmax)
return PRIO_HIGHEST_IMPL;
if (prio > normal)
return PRIO_HIGH_IMPL;
else if (prio == normal)
return PRIO_NORMAL_IMPL;
else if (prio > pmin)
return PRIO_LOW_IMPL;
else
return PRIO_LOWEST_IMPL;
}
else return PRIO_HIGHEST_IMPL;
}
bool ThreadImpl::setAffinityImpl(int coreID)
{
#if POCO_OS == POCO_OS_LINUX
int numCores = sysconf(_SC_NPROCESSORS_ONLN);
if (coreID < 0 || coreID >= numCores)
return false;
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
CPU_SET(coreID, &cpuset);
return 0 == pthread_setaffinity_np(_pData->thread, sizeof(cpu_set_t), &cpuset);
#else
return false;
#endif
}
int ThreadImpl::getAffinityImpl() const
{
#if POCO_OS == POCO_OS_LINUX
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
if (0 == pthread_getaffinity_np(_pData->thread, sizeof(cpu_set_t), &cpuset))
{
for (int i = 0; i < CPU_SETSIZE; ++i)
{
if (CPU_ISSET(i, &cpuset)) return i;
}
}
#endif
return -1;
}
} // namespace Poco