Panda3D
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This is a sequence number that increments monotonically. More...
#include "updateSeq.h"
Public Member Functions | |
constexpr | UpdateSeq () |
Creates an UpdateSeq in the 'initial' state. | |
constexpr | UpdateSeq (const UpdateSeq &&from) noexcept |
UpdateSeq (const UpdateSeq ©) | |
void | clear () |
Resets the UpdateSeq to the 'initial' state. | |
AtomicAdjust::Integer | get_seq () const |
bool | is_fresh () const |
Returns true if the UpdateSeq is in the 'fresh' state. | |
bool | is_initial () const |
Returns true if the UpdateSeq is in the 'initial' state. | |
bool | is_old () const |
Returns true if the UpdateSeq is in the 'old' state. | |
bool | is_special () const |
Returns true if the UpdateSeq is in any special states, i.e. | |
bool | operator!= (const UpdateSeq &other) const |
UpdateSeq | operator++ () |
UpdateSeq | operator++ (int) |
bool | operator< (const UpdateSeq &other) const |
bool | operator<= (const UpdateSeq &other) const |
UpdateSeq & | operator= (const UpdateSeq ©) |
bool | operator== (const UpdateSeq &other) const |
bool | operator> (const UpdateSeq &other) const |
bool | operator>= (const UpdateSeq &other) const |
void | output (std::ostream &out) const |
Static Public Member Functions | |
static constexpr UpdateSeq | fresh () |
static constexpr UpdateSeq | initial () |
static constexpr UpdateSeq | old () |
Public Attributes | |
get_seq | |
Returns the internal integer value associated with the UpdateSeq. | |
This is a sequence number that increments monotonically.
It can be used to track cache updates, or serve as a kind of timestamp for any changing properties.
A special class is used instead of simply an int, so we can elegantly handle such things as wraparound and special cases. There are two special cases. Firstly, a sequence number is 'initial' when it is first created. This sequence is older than any other sequence number. Secondly, a sequence number may be explicitly set to 'old'. This is older than any other sequence number except 'initial'. Finally, we have the explicit number 'fresh', which is newer than any other sequence number. All other sequences are numeric and are monotonically increasing.
Definition at line 37 of file updateSeq.h.
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constexpr |
Creates an UpdateSeq in the 'initial' state.
Definition at line 24 of file updateSeq.I.
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inline |
Definition at line 31 of file updateSeq.I.
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constexprnoexcept |
Definition at line 38 of file updateSeq.I.
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Resets the UpdateSeq to the 'initial' state.
Definition at line 54 of file updateSeq.I.
References AtomicAdjustDummyImpl::set().
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inlinestaticconstexpr |
Definition at line 45 of file updateSeq.h.
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inlinestaticconstexpr |
Definition at line 43 of file updateSeq.h.
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Returns true if the UpdateSeq is in the 'fresh' state.
Definition at line 78 of file updateSeq.I.
References AtomicAdjustDummyImpl::get().
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Returns true if the UpdateSeq is in the 'initial' state.
Definition at line 62 of file updateSeq.I.
References AtomicAdjustDummyImpl::get().
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Returns true if the UpdateSeq is in the 'old' state.
Definition at line 70 of file updateSeq.I.
References AtomicAdjustDummyImpl::get().
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Returns true if the UpdateSeq is in any special states, i.e.
'initial', 'old', or 'fresh'.
Definition at line 87 of file updateSeq.I.
References AtomicAdjustDummyImpl::get().
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inlinestaticconstexpr |
Definition at line 44 of file updateSeq.h.
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inline |
Definition at line 104 of file updateSeq.I.
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inline |
Definition at line 144 of file updateSeq.I.
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Definition at line 177 of file updateSeq.I.
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inline |
Definition at line 112 of file updateSeq.I.
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Definition at line 120 of file updateSeq.I.
Definition at line 45 of file updateSeq.I.
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Definition at line 96 of file updateSeq.I.
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Definition at line 128 of file updateSeq.I.
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Definition at line 136 of file updateSeq.I.
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Definition at line 221 of file updateSeq.I.
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Returns the internal integer value associated with the UpdateSeq.
Useful for debugging only.
Definition at line 69 of file updateSeq.h.