Caleb
Thank you for taking the time to answer my email. I actually did use a
mutex to protect my queue.
I did another test very simple to reproduce the problem.
A program creates N threads that construct & destroy objects in an
object pool
With N = 9, it crashes on linux
Following is the source code of the program & the gdb trace.
Thank you for your help
#include <iostream>
#include
#include
#include
class Foo;
static boost::object_pool<Foo>* _pool;
class Foo{
public:
void handle(){
_pool->destroy(this);
}
};
class Bar{
public:
Bar(){}
void operator()(){
for(;;){
Foo* foo = _pool->construct();
foo->handle();
}
}
};
int main(int argc, char* argv[])
{
if(argc != 2){
std::cout << "Usage: nbThrd" << std::endl;
return 0;
}
int nbThrd = atoi(argv[1]);
_pool = new boost::object_pool<Foo>(1000);
boost::thread_group _threads;
Bar bar;
for (int i=0; iboost::default_user_allocator_new_delete::ordered_malloc_ne
ed_resize (this=0x8fc94c0)
at simple_segregated_storage.hpp:46
46 { return *(static_cast(ptr)); }
(gdb) where
#0
boost::poolboost::default_user_allocator_new_delete::ordered_malloc_ne
ed_resize (this=0x8fc94c0)
at simple_segregated_storage.hpp:46
#1 0x08049559 in boost::object_pool::construct (this=0x8fca760)
at object_pool.hpp:76
#2 0x08049492 in
boost::detail::function::void_function_obj_invoker0::invoke
(function_obj_ptr=
{obj_ptr = 0x8fc9628, const_obj_ptr = 0x8fc9628, func_ptr =
0x8fc9628, data = "("}) at custom.cpp:26
#3 0x00138ef5 in boost::function0boost::function_base >::operator() (this=0x40417a70)
at function_template.hpp:581
#4 0x00138145 in thread_proxy (param=0xbfffc950) at
/home/tjamet/dev/boost_1_32_0/libs/thread/src/thread.cpp:113
#5 0x00454dec in start_thread () from /lib/tls/libpthread.so.0
#6 0x00224a2a in clone () from /lib/tls/libc.so.6
-----Original Message-----
From: boost-users-bounces@lists.boost.org
[mailto:boost-users-bounces@lists.boost.org] On Behalf Of Caleb Epstein
Sent: Saturday, August 06, 2005 11:31 AM
To: boost-users@lists.boost.org
Subject: Re: [Boost-users] Maybe a problem with boost::object_pool?
On 8/5/05, Labour, Matthieu (MLPRO SF) wrote:
There are 2 threads.
One thread creates Objects using boost::object_pool and enqueues them
into a
stl queue.
Are you using a mutex to protect the push/pop operations on the queue?
If not, then this is your problem.
--
Caleb Epstein
caleb dot epstein at gmail dot com
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