#include <UnlikelyLock.h>
Collaboration diagram for UnlikelyLock:
Public Member Functions | |
| void | enter () |
| void | leave () |
| void | acquire () |
| void | release () |
Private Attributes | |
| Mutex | m_Lock |
| ConditionVariable | m_Condition |
| uint64_t | m_nReaders |
| uint64_t | m_nWaitingWriters |
| bool | m_bActiveWriter |
Detailed Description
A reader/writer lock optimised for the case where exclusive access is rare.
Admission waits internally until ownership is available. Signal delivery remains visible to the outer operation, but cannot make a caller retry and accidentally lose the interruption or bypass lock ownership.
Definition at line 41 of file UnlikelyLock.h.
Constructor & Destructor Documentation
◆ UnlikelyLock()
| UnlikelyLock::UnlikelyLock | ( | ) |
Definition at line 24 of file UnlikelyLock.cc.
◆ ~UnlikelyLock()
| UnlikelyLock::~UnlikelyLock | ( | ) |
Definition at line 27 of file UnlikelyLock.cc.
Member Function Documentation
◆ acquire()
| void UnlikelyLock::acquire | ( | ) |
Locks the lock. Will not return until all other threads have exited the critical region.
Definition at line 55 of file UnlikelyLock.cc.
References ConditionVariable::waitForCompletion().
Referenced by PosixSubsystem::acquire(), FatFilesystem::getClusterEntry(), PosixSubsystem::getSignalDisposition(), PosixSubsystem::PosixSubsystem(), PosixSubsystem::queueSignalDelivery(), PosixSubsystem::resetSignalHandlersForExec(), FatFilesystem::setClusterEntry(), and PosixSubsystem::setSignalHandler().
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◆ enter()
| void UnlikelyLock::enter | ( | ) |
Enters the critical section after all active writers have left.
Definition at line 34 of file UnlikelyLock.cc.
References ConditionVariable::waitForCompletion().
Referenced by PosixSubsystem::getSignalDisposition(), and PosixSubsystem::PosixSubsystem().
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◆ leave()
| void UnlikelyLock::leave | ( | ) |
Leaving the critical section.
Definition at line 43 of file UnlikelyLock.cc.
References ConditionVariable::broadcast().
Referenced by PosixSubsystem::getSignalDisposition(), and PosixSubsystem::PosixSubsystem().
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◆ release()
| void UnlikelyLock::release | ( | ) |
Releases the lock.
Definition at line 66 of file UnlikelyLock.cc.
References ConditionVariable::broadcast().
Referenced by FatFilesystem::getClusterEntry(), PosixSubsystem::getSignalDisposition(), PosixSubsystem::PosixSubsystem(), PosixSubsystem::queueSignalDelivery(), PosixSubsystem::release(), PosixSubsystem::resetSignalHandlersForExec(), FatFilesystem::setClusterEntry(), and PosixSubsystem::setSignalHandler().
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Member Data Documentation
◆ m_bActiveWriter
|
private |
Definition at line 65 of file UnlikelyLock.h.
◆ m_Condition
|
private |
Definition at line 61 of file UnlikelyLock.h.
◆ m_Lock
|
private |
Definition at line 60 of file UnlikelyLock.h.
◆ m_nReaders
|
private |
Definition at line 63 of file UnlikelyLock.h.
◆ m_nWaitingWriters
|
private |
Definition at line 64 of file UnlikelyLock.h.
The documentation for this class was generated from the following files:
