bslmt_once.h File Reference

#include <bsls_ident.h>
#include <bslscm_version.h>
#include <bslmt_qlock.h>
#include <bsls_atomicoperations.h>
#include <bsls_assert.h>
#include <bsls_buildtarget.h>
#include <bsls_performancehint.h>
#include <bsls_platform.h>
#include <bsl_exception.h>

Go to the source code of this file.

Classes
class	bslmt::Once
class	bslmt::OnceGuard

Macros
#define	BSLMT_ONCE_UNIQNUM   __LINE__
#define	BSLMT_ONCE_DO    BSLMT_ONCE_DO_IMP(BSLMT_ONCE_CAT(bslmt_doOnceObj, BSLMT_ONCE_UNIQNUM))
#define	BSLMT_ONCE_CANCEL()   bslmt_doOnceGuard.cancel()
#define	BSLMT_ONCE_INITIALIZER   { BSLMT_QLOCK_INITIALIZER, { 0 } }
#define	BSLMT_ONCE_CAT(X, Y)   BSLMT_ONCE_CAT_IMP(X, Y)
#define	BSLMT_ONCE_CAT_IMP(X, Y)   X##Y
#define	BSLMT_ONCE_DO_IMP(doOnceObj)
#define	BSLMT_ONCE__CAT(X, Y)   BSLMT_ONCE_CAT(X, Y)

Detailed Description

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Macro Definition Documentation

BSLMT_ONCE_CAT

#define BSLMT_ONCE_CAT	(		X,
			Y
	)		BSLMT_ONCE_CAT_IMP(X, Y)

BSLMT_ONCE_CAT_IMP

#define BSLMT_ONCE_CAT_IMP	(		X,
			Y
	)		X##Y

BSLMT_ONCE_DO_IMP

#define BSLMT_ONCE_DO_IMP

(

doOnceObj

)

Value:

    static BloombergLP::bslmt::Once doOnceObj = BSLMT_ONCE_INITIALIZER;       \
    if (BSLS_PERFORMANCEHINT_PREDICT_UNLIKELY(                                \
                                           doOnceObj.isMaybeUninitialized())) \
        for (BloombergLP::bslmt::OnceGuard                        /* NOLINT */\
                                                bslmt_doOnceGuard(&doOnceObj);\
             bslmt_doOnceGuard.enter(); bslmt_doOnceGuard.leave())