Boost C++ Libraries

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This is the documentation for a snapshot of the master branch, built from commit 74e8f062a6.
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Type advice_types

boost::interprocess::mapped_region::advice_types

Synopsis

// In header: <boost/interprocess/mapped_region.hpp>


enum advice_types { advice_normal, advice_sequential, advice_random, 
                    advice_willneed, advice_dontneed };

Description

This enum specifies region usage behaviors that an application can specify to the mapped region implementation.

advice_normal

Specifies that the application has no advice to give on its behavior with respect to the region. It is the default characteristic if no advice is given for a range of memory.

advice_sequential

Specifies that the application expects to access the region sequentially from lower addresses to higher addresses. The implementation can lower the priority of preceding pages within the region once a page have been accessed.

advice_random

Specifies that the application expects to access the region in a random order, and prefetching is likely not advantageous.

advice_willneed

Specifies that the application expects to access the region in the near future. The implementation can prefetch pages of the region.

advice_dontneed

Specifies that the application expects that it will not access the region in the near future. The implementation can unload pages within the range to save system resources.


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