bsls::PerformanceHint Struct Reference

#include <bsls_performancehint.h>

Static Public Member Functions
static void	prefetchForReading (const void *address)
static void	prefetchForWriting (void *address)
static void	rarelyCalled ()
static BSLS_PERFORMANCEHINT_ATTRIBUTE_COLD void	lowFrequency ()

Detailed Description

This struct provides a namespace for a suite of functions that give performance hints to the compiler or hardware.

Member Function Documentation

lowFrequency()

BSLS_PERFORMANCEHINT_ATTRIBUTE_COLD void bsls::PerformanceHint::lowFrequency ( )

inlinestatic

This is an empty function that is marked with low execution frequency using pragmas. If this function is placed in a block of code inside a branch, the compiler will optimize the assembly code generated and mark the block as unlikely.

prefetchForReading()

void bsls::PerformanceHint::prefetchForReading ( const void *  address )

inlinestatic

Prefetch one cache line worth of data at the specified address for reading if the compiler built-in is available (see to the component level document for limitations). Otherwise this method has no effect.

prefetchForWriting()

void bsls::PerformanceHint::prefetchForWriting ( void *  address )

inlinestatic

Prefetch one cache line worth of data at the specified address for writing if the compiler built-in is available (see to the component level document for limitations). Otherwise this method has no effect.

rarelyCalled()

static void bsls::PerformanceHint::rarelyCalled ( )

static

This is an empty function that is marked as rarely called using pragmas. If this function is placed in a block of code inside a branch, the compiler will optimize the assembly code generated and mark the block as unlikely. Note that this function is intentionally not inlined.

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

• bsls_performancehint.h