Handling Mutually Exclusive variable in background processes
43 次查看(过去 30 天)
显示 更早的评论
I have two functions where I access a shared variable.
% Create a shared variable using parallel.pool.Constant
sharedVar = parallel.pool.Constant(@() 0); % Initialize shared variable to 0
% Function 1: Increment the shared variable
function incrementSharedVar(sharedVar)
sharedVar.Value = sharedVar.Value + 1; % Increment shared variable
end
% Function 2: Decrement the shared variable
function decrementSharedVar(sharedVar)
sharedVar.Value = sharedVar.Value - 1; % Decrement shared variable
end
I run these functions in background.
% Run the increment and decrement functions as background tasks
f1 = parfeval(@incrementSharedVar, 0,sharedVar);
f2 = parfeval(@decrementSharedVar, 0,sharedVar);
% Wait for both tasks to complete
wait([f1, f2]);
How to ensure the mutual exclusion among this shared variable so that one function waits while the other function updates the value?
0 个评论
采纳的回答
Sumukh
2024-11-7,11:03
To run the functions ”f1” and “f2” as background tasks, the term "backgroundPool" must be passed as the first argument to "parfeval". You can refer to the following documentation to know more about this syntax:
The provided code does not change the value of the Constant object "sharedVar" because the value of the Constant object is read-only and cannot be changed once initialized. More details about the Constant object can be found in the following documentation:
A possible method to provide gaps between execution of the “parfeval” functions “f1” and “f2“ is to use DataQueue object. The DataQueue object can be used to create a queue of function calls by calling “f1” and “f2” one after the other using the “afterEach” command. Kindly refer to the following documentation to know more about the DataQueue object and its function "afterEach":
I hope this answers your query.
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Background Processing 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!