once.h File Reference

#include <functional>
#include "base/integral_types.h"
#include "base/macros.h"
#include "ion/base/staticsafedeclare.h"
#include "ion/port/atomic.h"
#include "ion/port/macros.h"
#include "ion/port/threadutils.h"

Include dependency graph for once.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Classes
class	ion::base::OnceFlag
	OnceFlag ensures that a target function is only evaluated once. More...
class	ion::base::Lazy< T >
	Lazily populates a value. More...

Namespaces
	ion
	Copyright 2016 Google Inc.
	ion::base
	EnumHelper instantiations. These must be in the ion::base namespace.

Macros
#define	ION_STATIC_ONCE_CHECKED(function)   ION_STATIC_ONCE(std::bind(::ion::base::OnceFlag::CallChecked, &function));
	Executes a given static bool() function exactly once. More...
#define	ION_STATIC_ONCE(function)
	Executes a given static void() or T() function exactly once. More...

Macro Definition Documentation

#define ION_STATIC_ONCE

(

function

)

Value:

do { \
    ION_DECLARE_SAFE_STATIC_POINTER(::ion::base::OnceFlag, s_once_flag_macro); \
    s_once_flag_macro->CallOnce(function); \
  } while (0)

Executes a given static void() or T() function exactly once.

Any return type is ignored.

Definition at line 133 of file once.h.

#define ION_STATIC_ONCE_CHECKED

(

function

)

ION_STATIC_ONCE(std::bind(::ion::base::OnceFlag::CallChecked, &function));

Executes a given static bool() function exactly once.

Logs an error if the function returns false.

Definition at line 128 of file once.h.