FWCore
Utilities
interface
CallOnceNoWait.h
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#ifndef FWCore_Utilities_CallOnceNoWait_h
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#define FWCore_Utilities_CallOnceNoWait_h
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// -*- C++ -*-
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//
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// Package: FWCore/Utilities
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// Class : CallOnceNoWait
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//
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//
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// Original Author: Chris Jones
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// Created: Fri, 15 Nov 2013 14:29:51 GMT
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//
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// system include files
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#include <atomic>
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// user include files
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// forward declarations
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namespace
edm
{
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class
CallOnceNoWait
{
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public
:
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CallOnceNoWait
() :
m_called
(
false
) {}
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template
<
typename
T>
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void
operator()
(
T
iCall) {
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bool
expected =
false
;
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if
(
m_called
.compare_exchange_strong(expected,
true
, std::memory_order_acq_rel)) {
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iCall();
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}
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}
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private
:
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std::atomic<bool>
m_called
;
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};
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}
// namespace edm
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#endif
funct::false
false
Definition:
Factorize.h:34
edm::CallOnceNoWait::operator()
void operator()(T iCall)
Definition:
CallOnceNoWait.h:45
edm
HLT enums.
Definition:
AlignableModifier.h:19
edm::CallOnceNoWait::CallOnceNoWait
CallOnceNoWait()
Definition:
CallOnceNoWait.h:42
edm::CallOnceNoWait::m_called
std::atomic< bool > m_called
Definition:
CallOnceNoWait.h:53
edm::CallOnceNoWait
Definition:
CallOnceNoWait.h:40
T
long double T
Definition:
Basic3DVectorLD.h:48
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