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AtomicAdjustDummyImpl Class Reference

A trivial implementation for atomic adjustments for systems that don't require multiprogramming, and therefore don't require special atomic operations. More...

#include "atomicAdjustDummyImpl.h"

Public Types

typedef long Integer
 
typedef void * Pointer
 

Static Public Member Functions

static void add (Integer &var, Integer delta)
 Atomically computes var += delta. More...
 
static Integer compare_and_exchange (Integer &mem, Integer old_value, Integer new_value)
 Atomic compare and exchange. More...
 
static Pointer compare_and_exchange_ptr (Pointer &mem, Pointer old_value, Pointer new_value)
 Atomic compare and exchange. More...
 
static bool dec (Integer &var)
 Atomically decrements the indicated variable and returns true if the new value is nonzero, false if it is zero. More...
 
static Integer get (const Integer &var)
 Atomically retrieves the snapshot value of the indicated variable. More...
 
static Pointer get_ptr (const Pointer &var)
 Atomically retrieves the snapshot value of the indicated variable. More...
 
static void inc (Integer &var)
 Atomically increments the indicated variable. More...
 
static Integer set (Integer &var, Integer new_value)
 Atomically changes the indicated variable and returns the original value. More...
 
static Pointer set_ptr (Pointer &var, Pointer new_value)
 Atomically changes the indicated variable and returns the original value. More...
 

Detailed Description

A trivial implementation for atomic adjustments for systems that don't require multiprogramming, and therefore don't require special atomic operations.

Definition at line 29 of file atomicAdjustDummyImpl.h.

Member Function Documentation

◆ add()

void AtomicAdjustDummyImpl::add ( AtomicAdjustDummyImpl::Integer &  var,
AtomicAdjustDummyImpl::Integer  delta 
)
inlinestatic

◆ compare_and_exchange()

AtomicAdjustDummyImpl::Integer AtomicAdjustDummyImpl::compare_and_exchange ( AtomicAdjustDummyImpl::Integer &  mem,
AtomicAdjustDummyImpl::Integer  old_value,
AtomicAdjustDummyImpl::Integer  new_value 
)
inlinestatic

Atomic compare and exchange.

If mem is equal to old_value, store new_value in mem. In either case, return the original value of mem. The caller can test for success by comparing return_value == old_value.

Definition at line 115 of file atomicAdjustDummyImpl.I.

References compare_and_exchange_ptr().

Referenced by DeletedBufferChain::deallocate(), get_ptr(), and UpdateSeq::is_special().

◆ compare_and_exchange_ptr()

AtomicAdjustDummyImpl::Pointer AtomicAdjustDummyImpl::compare_and_exchange_ptr ( AtomicAdjustDummyImpl::Pointer &  mem,
AtomicAdjustDummyImpl::Pointer  old_value,
AtomicAdjustDummyImpl::Pointer  new_value 
)
inlinestatic

◆ dec()

bool AtomicAdjustDummyImpl::dec ( AtomicAdjustDummyImpl::Integer &  var)
inlinestatic

Atomically decrements the indicated variable and returns true if the new value is nonzero, false if it is zero.

Definition at line 34 of file atomicAdjustDummyImpl.I.

References add().

Referenced by CachedTypedWritableReferenceCount::cache_unref(), NodeCachedReferenceCount::get_referenced_bits(), inc(), CachedTypedWritableReferenceCount::test_ref_count_integrity(), NodeReferenceCount::test_ref_count_integrity(), and ReferenceCount::unref().

◆ get()

AtomicAdjustDummyImpl::Integer AtomicAdjustDummyImpl::get ( const Integer &  var)
inlinestatic

Atomically retrieves the snapshot value of the indicated variable.

This is the only guaranteed safe way to retrieve the value that other threads might be asynchronously setting, incrementing, or decrementing (via other AtomicAjust methods).

Definition at line 72 of file atomicAdjustDummyImpl.I.

References set_ptr().

Referenced by UpdateSeq::fresh(), CachedTypedWritableReferenceCount::get_cache_ref_count(), NodeReferenceCount::get_node_ref_count(), NodeCachedReferenceCount::get_node_ref_count(), ReferenceCount::get_ref_count(), UpdateSeq::get_seq(), MemoryHook::heap_alloc_array(), MemoryHook::heap_alloc_single(), UpdateSeq::is_fresh(), UpdateSeq::is_initial(), UpdateSeq::is_old(), UpdateSeq::is_special(), set(), and DeletedBufferChain::validate().

◆ get_ptr()

AtomicAdjustDummyImpl::Pointer AtomicAdjustDummyImpl::get_ptr ( const Pointer &  var)
inlinestatic

Atomically retrieves the snapshot value of the indicated variable.

This is the only guaranteed safe way to retrieve the value that other threads might be asynchronously setting, incrementing, or decrementing (via other AtomicAjust methods).

Definition at line 100 of file atomicAdjustDummyImpl.I.

References compare_and_exchange().

Referenced by TypedWritable::decode_raw_from_bam_stream(), Filename::get_common_appdata_directory(), Filename::get_home_directory(), Filename::get_temp_directory(), Filename::get_user_appdata_directory(), ReferenceCount::get_weak_list(), ThreadSafeConstPointerTo< T >::operator const T *(), ThreadSafePointerTo< T >::operator T*(), ThreadSafePointerTo< T >::p(), ThreadSafeConstPointerTo< T >::p(), and set_ptr().

◆ inc()

void AtomicAdjustDummyImpl::inc ( AtomicAdjustDummyImpl::Integer &  var)
inlinestatic

Atomically increments the indicated variable.

Definition at line 22 of file atomicAdjustDummyImpl.I.

References dec().

Referenced by CachedTypedWritableReferenceCount::cache_ref(), NodeReferenceCount::node_ref(), NodeCachedReferenceCount::node_ref(), and ReferenceCount::ref().

◆ set()

AtomicAdjustDummyImpl::Integer AtomicAdjustDummyImpl::set ( AtomicAdjustDummyImpl::Integer &  var,
AtomicAdjustDummyImpl::Integer  new_value 
)
inlinestatic

Atomically changes the indicated variable and returns the original value.

Definition at line 56 of file atomicAdjustDummyImpl.I.

References get().

Referenced by add(), UpdateSeq::clear(), UpdateSeq::fresh(), and ConnectionReader::shutdown().

◆ set_ptr()

AtomicAdjustDummyImpl::Pointer AtomicAdjustDummyImpl::set_ptr ( AtomicAdjustDummyImpl::Pointer &  var,
AtomicAdjustDummyImpl::Pointer  new_value 
)
inlinestatic

Atomically changes the indicated variable and returns the original value.

Definition at line 83 of file atomicAdjustDummyImpl.I.

References get_ptr().

Referenced by get().


The documentation for this class was generated from the following files: