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 Integer	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 27 of file atomicAdjustDummyImpl.h.

Member Function Documentation

◆ add()

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

inlinestatic

Atomically computes var += delta.

It is legal for delta to be negative. Returns the result of the addition.

Definition at line 36 of file atomicAdjustDummyImpl.I.

Referenced by MemoryHook::dec_heap(), TypeHandle::dec_memory_usage(), MemoryHook::inc_heap(), and TypeHandle::inc_memory_usage().

◆ 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 93 of file atomicAdjustDummyImpl.I.

Referenced by ReferenceCount::ref_if_nonzero().

◆ compare_and_exchange_ptr()

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

inlinestatic

Atomic compare and exchange.

As above, but works on pointers instead of integers.

Definition at line 109 of file atomicAdjustDummyImpl.I.

Referenced by GraphicsStateGuardianBase::add_gsg(), Filename::get_common_appdata_directory(), Filename::get_home_directory(), Filename::get_temp_directory(), Filename::get_user_appdata_directory(), and PT().

◆ 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 27 of file atomicAdjustDummyImpl.I.

Referenced by LightLensNode::attrib_unref(), WeakReferenceList::unref(), and StreamWrapperBase::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 59 of file atomicAdjustDummyImpl.I.

Referenced by AsyncFuture::cancelled(), AsyncFuture::done(), TypeHandle::get_memory_usage(), NodeReferenceCount::get_node_ref_count(), NodeCachedReferenceCount::get_node_ref_count(), UpdateSeq::is_fresh(), UpdateSeq::is_initial(), UpdateSeq::is_old(), ModelFlattenRequest::is_ready(), AnimateVerticesRequest::is_ready(), AudioLoadRequest::is_ready(), TextureReloadRequest::is_ready(), ModelSaveRequest::is_ready(), ModelLoadRequest::is_ready(), UpdateSeq::is_special(), ReferenceCount::ref_if_nonzero(), and WeakReferenceList::was_deleted().

◆ 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 81 of file atomicAdjustDummyImpl.I.

Referenced by GraphicsStateGuardianBase::add_gsg(), Filename::get_common_appdata_directory(), GraphicsStateGuardianBase::get_default_gsg(), ClockObject::get_global_clock(), 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(), GraphicsStateGuardianBase::remove_gsg(), and GraphicsStateGuardianBase::set_default_gsg().

◆ inc()

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

inlinestatic

Atomically increments the indicated variable.

Definition at line 18 of file atomicAdjustDummyImpl.I.

Referenced by LightLensNode::attrib_ref(), AsyncGatheringFuture::cancel(), WeakReferenceList::ref(), and StreamWrapperBase::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 46 of file atomicAdjustDummyImpl.I.

Referenced by UpdateSeq::clear().

◆ 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 67 of file atomicAdjustDummyImpl.I.

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

dtool/src/dtoolbase/atomicAdjustDummyImpl.h
dtool/src/dtoolbase/atomicAdjustDummyImpl.I

Public Types

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ add()

◆ compare_and_exchange()

◆ compare_and_exchange_ptr()

◆ dec()

◆ get()

◆ get_ptr()

◆ inc()

◆ set()

◆ set_ptr()