One-time Initialization for Multi-threaded Data Safety
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Solution Overview
Problem
In multi-threaded environments, the deferred initialization of data items can lead to potential errors due to concurrent initialization attempts by multiple threads, requiring developers to implement synchronization constructs that can be platform-dependent and error-prone.
Innovation Solution
A method that enforces mutual exclusion for the first thread attempting to initialize a data item, using a one-time initialization primitive to track the initialization state and block subsequent threads until the initialization is complete, or allows concurrent initialization attempts without blocking, ensuring each thread receives the necessary initialization data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If deferred initialization is used to reduce resource usage, then resource efficiency is improved, but reliability deteriorates due to concurrent initialization errors
Solution Approach 1:
The patent introduces an intermediary initialization state variable that mediates between multiple threads attempting to initialize the same object. This intermediary mechanism coordinates access without requiring complex synchronization constructs, allowing deferred initialization to proceed safely by detecting and preventing concurrent initialization attempts through atomic operations on the state variable.
2Reliability
If synchronization constructs are used to prevent concurrent initialization errors, then reliability is improved, but device complexity worsens
Solution Approach 1:
The initialization mechanism serves itself by using an atomic state variable that automatically indicates whether initialization is in progress or complete. Threads independently check this state variable to determine whether to proceed with initialization or wait, eliminating the need for external synchronization constructs and reducing overall system complexity while maintaining reliability.
3Reliability
If synchronization constructs are used to ensure safe initialization, then reliability is improved, but ease of operation worsens
Solution Approach 1:
The patent provides a standardized intermediary initialization function that developers can call without worrying about synchronization details. This function internally manages the atomic state variable and coordinates thread access, allowing developers to write platform-independent code that is both safe and easy to operate without directly implementing complex synchronization logic.
4Reliability
If platform-dependent synchronization constructs are used, then reliability is improved, but adaptability worsens
Solution Approach 1:
The patent creates a universal initialization mechanism using atomic operations on state variables that can be implemented consistently across different programming languages and platforms. This universal approach provides the same reliable synchronization behavior whether using C++, Java, or other languages, eliminating platform-dependent synchronization constructs while maintaining reliability through language-agnostic atomic operations.
Data Source
AI summary
Aspects of the present invention are directed at providing safe and efficient ways for a program to perform a one-time initialization of a data item in a multi-threaded environment. In accordance with one embodiment, a method is provided that allows a program to perform a synchronized initialization of a data item that may be accessed by multiple threads. More specifically, the method includes receiving a request to initialize the data item from a current thread. In response to receiving the request, the method determines whether the current thread is the first thread to attempt to initialize the data item. If the current thread is the first thread to attempt to initialize the data item, the method enforces mutual exclusion and blocks other attempts to initialize the data item made by concurrent threads. Then, the current thread is allowed to execute program code provided by the program to initialize the data item.