lifo | 易学教程

A MailboxProcessor that operates with a LIFO logic

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问题 I am learning about F# agents ( MailboxProcessor ). I am dealing with a rather unconventional problem. I have one agent ( dataSource ) which is a source of streaming data. The data has to be processed by an array of agents ( dataProcessor ). We can consider dataProcessor as some sort of tracking device. Data may flow in faster than the speed with which the dataProcessor may be able to process its input. It is OK to have some delay. However, I have to ensure that the agent stays on top of its

how to prevent corruption in concurrent lifo stack implemented with atomic compare and swap

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Below is a simplified C program that demonstrates a problem I am having with a concurrent stack implemented using the GNU built in compare and swap on an intel cpu. It took me a while to understand what was happening, but now that I do I see that it is well within the guarantees provided by atomic compare and swap. When a node is popped from the stack, modified, then placed back on the stack, the modified value may become the new head of the stack, corrupting it. The comments in test_get describe the order of events that cause this. Is there any way to reliably use the same node with the same

Can't Control Order of String Set in Shared Preferences

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问题 This is my first stackoverflow question. I have done lot of googling on this. On Hashsets, Treesets, LinkedHashSets, Collections, Stacks (Stack class is deprecated?)... I realize I could just use SQLite but I'm trying to avoid that for the time being. I'm working on an app in Android Studio. The app deals with people, listing them and contacting them in different ways. App users can maintain and control three types of lists: recently contacted, blocked, and favorites. These lists are saved as