atomic.hpp File Reference

#include <boost/static_assert.hpp>
#include <qi/config.hpp>
#include <qi/macro.hpp>

Go to the source code of this file.

Classes
struct	qi::AtomicBase< T >
class	qi::Atomic< T >
	Atomic operations on integers. More...

Namespaces
	qi
	qi general namespace

Macros
#define	_QI_ATOMIC_HPP_
#define	_QI_INSTANCIATE(_, a, elem)   ::qi::details::newAndAssign(&elem);
#define	QI_THREADSAFE_NEW(...)   QI_ONCE(QI_VAARGS_APPLY(_QI_INSTANCIATE, _, __VA_ARGS__);)
#define	QI_ONCE(code)
	Execute code once, parallel calls are blocked until code finishes. More...

Functions
long	qi::testAndSet (long *cond)

Macro Definition Documentation

#define _QI_ATOMIC_HPP_

Definition at line 10 of file atomic.hpp.

#define _QI_INSTANCIATE	(		_,
			a,
			elem
	)		::qi::details::newAndAssign(&elem);

Definition at line 200 of file atomic.hpp.

#define QI_ONCE

(

code

)

Value:

static qi::AtomicBase<int> QI_UNIQ_DEF(atomic_guard_a) = {0}; \
 static qi::AtomicBase<int> QI_UNIQ_DEF(atomic_guard_b) = {0}; \
 while (!QI_UNIQ_DEF(atomic_guard_a).setIfEquals(1, 1))       \
 {                                                           \
   bool tok = QI_UNIQ_DEF(atomic_guard_b).setIfEquals(0,1);  \
   if (tok)                                                  \
   {                                                    \
     code;                                              \
     ++QI_UNIQ_DEF(atomic_guard_a);                     \
   }                                                    \
 }

Execute code once, parallel calls are blocked until code finishes.

Definition at line 214 of file atomic.hpp.

#define QI_THREADSAFE_NEW

(

...

)

QI_ONCE(QI_VAARGS_APPLY(_QI_INSTANCIATE, _, __VA_ARGS__);)

Accept a list of pointers (expected to be static function variables) and new them once in a thrad-safe manner. Implementation aims for minimal overhead when initialization is done.

Definition at line 210 of file atomic.hpp.