monero/contrib/epee/include/syncobj.h
rfree2monero ae2a50659f 2014 network limit 1.2 +utils +toc -doc -drmonero
new update of the pr with network limits

more debug options:
discarding downloaded blocks all or after given height.
trying to trigger the locking errors.

debug levels polished/tuned to sane values.
debug/logging improved.

warning: this pr should be correct code, but it could make
an existing (in master version) locking error appear more often.

it's a race on the list (map) of peers, e.g. between closing/deleting
them versus working on them in net-limit sleep in sending chunk.

the bug is not in this code/this pr, but in the master version.

the locking problem of master will be fixed in other pr.

problem is ub, and in practice is seems to usually cause program abort
(tested on debian stable with updated gcc). see --help for option
to add sleep to trigger the error faster.
2015-02-20 22:28:03 +01:00

248 lines
5.9 KiB
C++

// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the Andrey N. Sabelnikov nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
#ifndef __WINH_OBJ_H__
#define __WINH_OBJ_H__
#include <condition_variable>
#include <mutex>
#include <boost/thread/locks.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/recursive_mutex.hpp>
#include <thread>
#include <chrono>
namespace epee
{
extern unsigned int g_test_dbg_lock_sleep;
struct simple_event
{
simple_event() : m_rised(false)
{
}
void raise()
{
std::unique_lock<std::mutex> lock(m_mx);
m_rised = true;
m_cond_var.notify_one();
}
void wait()
{
std::unique_lock<std::mutex> lock(m_mx);
while (!m_rised)
m_cond_var.wait(lock);
m_rised = false;
}
private:
std::mutex m_mx;
std::condition_variable m_cond_var;
bool m_rised;
};
class critical_region;
class critical_section
{
boost::recursive_mutex m_section;
public:
//to make copy fake!
critical_section(const critical_section& section)
{
}
critical_section()
{
}
~critical_section()
{
}
void lock()
{
m_section.lock();
//EnterCriticalSection( &m_section );
}
void unlock()
{
m_section.unlock();
}
bool tryLock()
{
return m_section.try_lock();
}
// to make copy fake
critical_section& operator=(const critical_section& section)
{
return *this;
}
};
template<class t_lock>
class critical_region_t
{
t_lock& m_locker;
bool m_unlocked;
critical_region_t(const critical_region_t&) {}
public:
critical_region_t(t_lock& cs): m_locker(cs), m_unlocked(false)
{
m_locker.lock();
}
~critical_region_t()
{
unlock();
}
void unlock()
{
if (!m_unlocked)
{
m_locker.unlock();
m_unlocked = true;
}
}
};
#if defined(WINDWOS_PLATFORM)
class shared_critical_section
{
public:
shared_critical_section()
{
::InitializeSRWLock(&m_srw_lock);
}
~shared_critical_section()
{}
bool lock_shared()
{
AcquireSRWLockShared(&m_srw_lock);
return true;
}
bool unlock_shared()
{
ReleaseSRWLockShared(&m_srw_lock);
return true;
}
bool lock_exclusive()
{
::AcquireSRWLockExclusive(&m_srw_lock);
return true;
}
bool unlock_exclusive()
{
::ReleaseSRWLockExclusive(&m_srw_lock);
return true;
}
private:
SRWLOCK m_srw_lock;
};
class shared_guard
{
public:
shared_guard(shared_critical_section& ref_sec):m_ref_sec(ref_sec)
{
m_ref_sec.lock_shared();
}
~shared_guard()
{
m_ref_sec.unlock_shared();
}
private:
shared_critical_section& m_ref_sec;
};
class exclusive_guard
{
public:
exclusive_guard(shared_critical_section& ref_sec):m_ref_sec(ref_sec)
{
m_ref_sec.lock_exclusive();
}
~exclusive_guard()
{
m_ref_sec.unlock_exclusive();
}
private:
shared_critical_section& m_ref_sec;
};
#endif
#define SHARED_CRITICAL_REGION_BEGIN(x) { shared_guard critical_region_var(x)
#define EXCLUSIVE_CRITICAL_REGION_BEGIN(x) { exclusive_guard critical_region_var(x)
#define CRITICAL_REGION_LOCAL(x) {std::this_thread::sleep_for(std::chrono::milliseconds(epee::g_test_dbg_lock_sleep));} epee::critical_region_t<decltype(x)> critical_region_var(x)
#define CRITICAL_REGION_BEGIN(x) { std::this_thread::sleep_for(std::chrono::milliseconds(epee::g_test_dbg_lock_sleep)); epee::critical_region_t<decltype(x)> critical_region_var(x)
#define CRITICAL_REGION_LOCAL1(x) {std::this_thread::sleep_for(std::chrono::milliseconds(epee::g_test_dbg_lock_sleep));} epee::critical_region_t<decltype(x)> critical_region_var1(x)
#define CRITICAL_REGION_BEGIN1(x) { std::this_thread::sleep_for(std::chrono::milliseconds(epee::g_test_dbg_lock_sleep)); epee::critical_region_t<decltype(x)> critical_region_var1(x)
#define CRITICAL_REGION_END() }
#if defined(WINDWOS_PLATFORM)
inline const char* get_wait_for_result_as_text(DWORD res)
{
switch(res)
{
case WAIT_ABANDONED: return "WAIT_ABANDONED";
case WAIT_TIMEOUT: return "WAIT_TIMEOUT";
case WAIT_OBJECT_0: return "WAIT_OBJECT_0";
case WAIT_OBJECT_0+1: return "WAIT_OBJECT_1";
case WAIT_OBJECT_0+2: return "WAIT_OBJECT_2";
default: return "UNKNOWN CODE";
}
}
#endif
}
#endif