/usr/include/log4cpp/threading/OmniThreads.hh is in liblog4cpp5-dev 1.0-4.
This file is owned by root:root, with mode 0o644.
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* OmniThreads.hh
*
* Copyright 2002, LifeLine Networks BV (www.lifeline.nl). All rights reserved.
* Copyright 2002, Bastiaan Bakker. All rights reserved.
*
* See the COPYING file for the terms of usage and distribution.
*/
#ifndef _LOG4CPP_THREADING_OMNITHREADS_HH
#define _LOG4CPP_THREADING_OMNITHREADS_HH
#include <log4cpp/Portability.hh>
#include <omnithread.h>
#include <stdio.h>
#include <string>
namespace log4cpp {
namespace threading {
/**
* Return an identifier for the current thread. What these
* identifiers look like is completely up to the underlying
* thread library. OmniThreads returns the POSIX thread Id.
**/
std::string getThreadId();
/**
* A simple, non recursive Mutex.
* Equivalent to Boost.Threads boost::mutex
**/
typedef omni_mutex Mutex;
/**
* A simple "resource acquisition is initialization" idiom type lock
* for Mutex.
* Equivalent to Boost.Threads boost::scoped_lock.
**/
typedef omni_mutex_lock ScopedLock;
/**
* This class holds Thread local data of type T, i.e. for each
* thread a ThreadLocalDataHolder holds 0 or 1 instance of T.
* The held object must be heap allocated and will be deleted
* upon termination of the thread to wich it belongs.
* This is an omni_threads based equivalent of Boost.Threads
* thread_specific_ptr<T> class.
**/
template<typename T> class ThreadLocalDataHolder {
public:
typedef T data_type;
inline ThreadLocalDataHolder() :
_key(omni_thread::allocate_key()) {};
inline ~ThreadLocalDataHolder() {};
/**
* Obtains the Object held for the current thread.
* @return a pointer to the held Object or NULL if no
* Object has been set for the current thread.
**/
inline T* get() const {
Holder* holder = dynamic_cast<Holder*>(
::omni_thread::self()->get_value(_key));
return (holder) ? holder->data : NULL;
};
/**
* Obtains the Object held for the current thread.
* Initially each thread holds NULL.
* @return a pointer to the held Object or NULL if no
* Object has been set for the current thread.
**/
inline T* operator->() const { return get(); };
/**
* Obtains the Object held for the current thread.
* @pre get() != NULL
* @return a reference to the held Object.
**/
inline T& operator*() const { return *get(); };
/**
* Releases the Object held for the current thread.
* @post get() == NULL
* @return a pointer to the Object thas was held for
* the current thread or NULL if no Object was held.
**/
inline T* release() {
T* result = NULL;
Holder* holder = dynamic_cast<Holder*>(
::omni_thread::self()->get_value(_key));
if (holder) {
result = holder->data;
holder->data = NULL;
}
return result;
};
/**
* Sets a new Object to be held for the current thread. A
* previously set Object will be deleted.
* @param p the new object to hold.
* @post get() == p
**/
inline void reset(T* p = NULL) {
Holder* holder = dynamic_cast<Holder*>(
::omni_thread::self()->get_value(_key));
if (holder) {
if (holder->data)
delete holder->data;
holder->data = p;
} else {
holder = new Holder(p);
::omni_thread::self()->set_value(_key, holder);
}
};
private:
class Holder : public omni_thread::value_t {
public:
Holder(data_type* data) : data(data) {};
virtual ~Holder() { if (data) delete (data); };
data_type* data;
private:
Holder(const Holder& other);
Holder& operator=(const Holder& other);
};
omni_thread::key_t _key;
};
}
}
#endif
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