suspend

How to synchronize shared data between threads by using pause then resume or alternatives

由 ╄→гoц情女王★ 提交于 2019-12-11 02:46:30
问题 I'm writing a game in which a thread - GameThread - loops forever, updating all my sprites, rendering them, and then sleeping for some time before doing it all again. I also have a custom-made Event handler which deals with key presses etc. This all works fine in most cases. However I have a problem if an event is thrown while GameThread is rendering. On rare occasions, the handler that deals with the event may make a concurrent change to what needs to be rendered affecting the results of the

How to execute procedure returning resultset in Firebird

由 最后都变了- 提交于 2019-12-11 02:23:23
问题 I have the following table create table LIST_PIPE_TABLE ( ID INT, ITEM VARCHAR(4000), IS_FOLDER VARCHAR(10) ) with 3 rows of data insert into LIST_PIPE_TABLE values(1,'Victorias Secret','true') insert into LIST_PIPE_TABLE values(2,'Porsche','true') insert into LIST_PIPE_TABLE values(3,'Babbolat','false') And a stored procedure that should return resultset CREATE or alter PROCEDURE LIST_PIPE RETURNS ( col1 varchar(4000), col2 varchar(10) ) AS begin FOR SELECT ITEM AS ITEM ,IS_FOLDER AS IS

Entering sleep mode on arm cortex m4

由 坚强是说给别人听的谎言 提交于 2019-12-10 17:57:02
问题 I'm trying to put a cortex m4 processor to sleep for a little less than a second. I want to be able to tell it to sleep, then a second later, or when a button is pressed, pick up right where I left off. I've looked in the reference manual and VLPS mode looks like it would fit my needs. I don't know how to begin to enter that mode or how to program the NVIC . More Info: I am doing this in C, on the bare metal. 回答1: You can download and inspect the code that implements this demo. Although the

Why is adding SuspendLayout and ResumeLayout reducing performance?

由 做~自己de王妃 提交于 2019-12-09 09:21:49
问题 I need to add a lot of controls to a parent control. But I find if I add ParentControl.SuspendLayout and ParentControl.ResumeLayout before and after I add those controls to the parent, I use stopwatch to measure the ticks: If I remove the code ParentControl.SuspendLayout and ParentControl.ResumeLayout , it will be faster. Why does it happen? So SuspendLayout and ResumeLayout are not supposed to reduce the time to add sub controls, right? So what's the benefit to use SuspendLayout and

How to suspend notification to observers while doing many changes using a ContentProvider

由 喜欢而已 提交于 2019-12-08 08:43:32
问题 I have an ExpandableListView that uses a SimpleCursorTreeAdapter which uses the cursors returned by a ContentProvider. This is fine as it always keeps in sync with the data but sometimes I need to do many changes to the database so that the cursor is requeried many times in the same second. Is it possible to suspend the notification of ContentObservers to avoid unnecessary requerys? 回答1: A possible solution is to modify the content provider to allow suspending notifications. URIs to be

HTML5 Video - Suspend Loading / Partial Load

由 馋奶兔 提交于 2019-12-08 01:38:38
问题 Is there a way to preload a portion of a video, but not the entire thing? I noticed that there is a "suspend" event that indicates the video is expectedly not downloading until further instruction, but I'm unsure of how to trigger this event? My goal is to preload a portion of a video without taking up all the users' bandwidth. Thanks! 回答1: You can pre-fetch any URL with XHR, but you can't control how much it pre-fetch from the client-side. I think you can try this: set a header in the XHR

XCTest UI Testing - How to close and open an app without relaunch?

由 ▼魔方 西西 提交于 2019-12-07 03:01:24
问题 I want to make my app to go to background, and then comeback to the foreground. To make an app to go background: XCUIDevice.shared().press(XCUIDeviceButton.home) To terminate an app(force tap): XCUIApplication().terminate() To launch the app: XCUIApplication().launch() Problem : when I try to close and open the app, the launch() method clears the app from background and it opens the app freshly. I saw this comment regarding this. But cant able to figure out it in UI test. I'm using Swift.

UWP suspend disable with ExtendedExecutionSession or ExtendedExecutionForegroundSession

由 ♀尐吖头ヾ 提交于 2019-12-06 11:32:02
问题 UWP, I can not be disable to suspend. I need your knowledge. Here is my simple example to know issue. It's counter increase/decrease application. Actually, I want to monitor temperatures from device for 356 x 24 hours without any stopping. I expect to increase value++ during Suspend mode. but UWP does not work during supending.. Why ?? Uploaded code is here at Github.com. You can test My simple application. https://github.com/bidasknakayama/Basic here is my environment. It's desktop PC.

Sleep(suspend) and Resuming windows form starts program on worker thread instead of main thread

由 大兔子大兔子 提交于 2019-12-06 11:28:15
The windows form I am working on subscribes to Microsoft.Win32.SystemEvents.PowerModeChanged and on Suspend it runs the Close() method on the form. On Resume it runs the Run() function like it would on initial load. The problem is that when the computer is woken from sleep mode the PowerModeChanged event is triggered on a worker thread named ".Net SystemEvents" and when Run() is called it recreates the form on this worker thread instead of the main thread. This form is a project I inherited from another developer and I am new to windows form programming. I am wondering if there is a better way

Pausing a download thread

由 淺唱寂寞╮ 提交于 2019-12-06 07:49:17
问题 I'm writing a very simple bulk download program in c# that reads a .txt file of URLs to download. I've set it up with a global Thread and delegate for updating the GUI, and the pressing of the "Begin" button creates and starts that thread. What I want to do is have a "Pause" button that enables me to pause the download until I hit the "Resume" button. How do I do this? The relevant code: private Thread thr; private delegate void UpdateProgressCallback(int curFile); private void Begin_btn
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