ion::base::OnceFlag Class Reference

OnceFlag ensures that a target function is only evaluated once. More...

#include "once.h"

Public Member Functions
	OnceFlag ()
void	CallOnce (const std::function< void()> &target)
	If this OnceFlag instance has never executed a target function, CallOnce calls the target function. More...

Static Public Member Functions
static void	CallChecked (const std::function< bool()> &target)

Detailed Description

OnceFlag ensures that a target function is only evaluated once.

Todo:

(user): Reimplement in terms of std::call_once once c++11 is available on all platforms, and/or deprecate. Note that even once it is available, caution may be advised as some platform implementations may be very bad...

Definition at line 38 of file once.h.

Constructor & Destructor Documentation

ion::base::OnceFlag::OnceFlag ( )

inline

Definition at line 40 of file once.h.

Member Function Documentation

static void ion::base::OnceFlag::CallChecked ( const std::function< bool()> &  target )

inlinestatic

Definition at line 49 of file once.h.

References ion::port::ERROR, and LOG.

void ion::base::OnceFlag::CallOnce ( const std::function< void()> &  target )

inline

If this OnceFlag instance has never executed a target function, CallOnce calls the target function.

Inlines.

Thread safe, and all side effects of a call to a target function are guaranteed to be visible when the call returns. This call is not exception safe - if a target throws or the thread terminates this instance becomes invalid.

Definition at line 94 of file once.h.

References ion::port::YieldThread().

Referenced by ion::base::Lazy< T >::Get().

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The documentation for this class was generated from the following file:

• base/once.h