- Generated by
1.9.8
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BDE 4.14.0 Production release
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Provide a multi-reader/single-writer lock.
This component defines an efficient multi-reader/single-writer lock mechanism, bslmt::ReaderWriterMutexImpl. It is designed to allow concurrent read access to a shared resource while still controlling write access.
Reader-writer locks are generally used for resources that are frequently read and less frequently updated. Unlike other lock mechanisms (e.g., "mutexes"), reader-writer locks provide two distinct but mutually exclusive lock states: a read lock state, and a write lock state.
To the extent the implementation's underlying mutex prevents a thread from starving, readers can not be starved by writers and writers can not be starved by readers. If the underlying mutex, to some extent, favors re-acquisition of the mutex to allowing a new thread to obtain the mutex (e.g., the mutex obtained on Linux), this reader-writer lock is writer biased since writers can re-acquire the lock in the presence of readers but readers will not be able to re-acquire the lock in the presence of writers.
There is no usage example for this component since it is not meant for direct client use.
1.9.8