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When the Linux kernel prints "bug: Scheduling while atomic" and "Bad: scheduling from the idle thread" errors, it usually calls sleep functions in the interrupt processing function, such as semaphore, mutex, sleep, and other sleep functions, while the Linux kernel requires that the system height and preemption are not allowed during Interrupt Processing, and other tasks can be performed only after the interrupt processing is completed. Therefore, it m
In php, foreach is combined with curl to implement multi-thread analysis. foreachcurl This example describes how to use foreach in php to implement multithreading with curl. We will share this with you for your reference. The details are as follows: Multithreading is not supported by php, but we can use foreach to pseudo-multithreading. However, the speed of this pseudo-multithreading is not necessarily the
If there is only one task in Nsoperation, and the call to start method does not open the thread, start is executed by default on the current thread.If there is only one task in the nsoperation, the thread is opened in the queue and the new thread is not opened if it is the home columnMultiple tasks are added to a nsoperation, and the Start method is called to ope
Runnable:@FunctionalInterfacepublic interface Runnable { /** * When an object implementing interface Runnable is an interface with only one method.Thread:Publicclass Thread implements Runnable {/* What'll be run. */ private Runnable target; /** * If This thread is constructed using a separate * * Thread implementation of the Runnable inter
(rawevent)Geteventhub ()->mapkey (Getdeviceid (), Scancode,...) Convert the driver escalated Linux kernel layer code to the corresponding code in AndroidProcesskeyNotifykeyargs args (...) Use multiple data to construct args, then escalate the args dataGetlistener ()->notifykey (args)//Notify a listener to process args, here listener must be dispatcher threadMargsqueue.push (...)Description: The Input_device structure under Mdevices in Inputreader is used to process the dataThe device structure
Close the thread poolThe source code of shutdown () is as follows: Public voidshutdown () {FinalReentrantlock Mainlock = This. Mainlock; //Get lockMainlock.lock (); Try { //check that the thread pool's threads have permission to terminate. checkshutdownaccess (); //sets the status of the thread pool to off state. advancerunstate (SHUTDOWN); //Threads that
/**** Org.hibernate.HibernateException:No Session found for current thread* Analysis: Getcurrentsession () is related to the current transaction** Process of Spring hibernate transaction** 1. Before the method starts*①. Getting session*②. Bind the session to the current thread so that you can use the sessionfactory in the DAO* Getcurrentsession () method to get t
Thread 1 cannot allocate new log Problem Analysis In the event of an Oracle crash, the alert file reports the following error: Fri Jan 12 04:07:49 2007Thread 1 cannot allocate new log, sequence 187398Checkpoint not complete Cause analysis: The background process of ckpt is to do the checkpoint. One of the conditions that the checkpoint is triggered is the
This article analyzes the C + + thread synchronization problem and share it for everyone's reference. The specific analysis is as follows: This instance sets the global variable g_bcontinue, sets the global variable g_bcontinue in the main thread, detects the global variable by the worker thread, and realizes the purp
[Concurrent concurrency] _ [thread synchronization] _ [Analysis of the single-instance mode using C/C ++] Scenario: 1. in many cases, we need to implement the singleton mode of a class, such as XXManager, so we provide a GetInstance () function. java can use double locks for processing. c/C ++ is similar. 2. A required condition for providing GetInstance () must be thr
This article mainly introduces PHP multi-thread programming for pipeline communication. The example analyzes the pipeline Communication Principles and related usage skills, and has some reference value. If you need it, you can refer to it. This article mainly introduces PHP multi-thread programming for pipeline communication. The example analyzes the pipeline Communication Principles and related usage skill
1. Introduction of Synchronous lock 2. Synchronous Lock Case Analysis Package com.itcast.family; public class Traditionalthreadsynchronized {public static void main (string[] args) {new traditionalthreadsynchronize D (). Init (); The function of the method is that the static method of the external class cannot instantiate the inner class object, so it cannot be instantiated directly in main of the outer class, the common method to create an interm
1 Preface The previous chapter summarizes the source code analysis for loading shared files. Previously, RT-thread currently supports shared files and relocated files, which is also the purpose of this chapter. A relocated file is simply a. o file that contains code and data suitable for creating executable files or sharing target files through links to other target files. In rt-
/**errornumberforfinshshell.**copyright (C) 2013,shanghaireal-threadtechnologyco.,ltd**this fileispartofRT-Thread (http://www.rt-thread.org) * Maintainer:bernard.xiongThis article is from the "mountain Ask the Boy" blog, please be sure to keep this source http://linpeng.blog.51cto.com/9779987/1685378Rt-thread finsh Source Analysis: FINSH_ERROR.C
/**variableimplementationinfinshshell.**copyright (C) 2006-2013,rt-threaddevelopmentteam**this fileispartofRT-Thread (http://www.rt-thread.org) * Maintainer:bernard.xiongThis article is from the "mountain Ask the Boy" blog, please be sure to keep this source http://linpeng.blog.51cto.com/9779987/1685393Rt-thread finsh Source Analysis: FINSH_VAR.C
Recently saw "Detective Theater: Heap Memory Mysterious Overflow event" https://my.oschina.net/u/2368090/blog/1628720, so I also want to test to understand dateformat multithreading security issues.First look at the phenomenon: do a multithreaded use of the same Simplydateformat test example:Import Java.text.simpledateformat;import Java.util.date;public class Dateformattest { static SimpleDateFormat SDF = new SimpleDateFormat ("Yyyy-mm-dd"); public static void Main (string[] args) throws e
This article mainly introduces PHP multi-thread programming for pipeline communication. The example analyzes the pipeline communication principles and related usage skills, and has some reference value, for more information, see the example in this article. Share it with you for your reference. The specific analysis is as follows: If a thread is personal heroism
In the process of Bluetooth enable, multiple threads are created and the threads are bound to the queue. This article mainly analyzes the processing of HCI data this thread.voidBtu_startup (void){. .. btu_bta_msg_queue=fixed_queue_new (Size_max);Btu_general_alarm_hash_map=hash_map_new (btu_general_alarm_hash_map_size, Hash_function_pointer, NULL, (DATA_FREE_FN) alarm_free, NULL) ;Btu_general_alarm_queue=fixed_queue_new (Size_max);Btu_oneshot_alarm_hash_map=hash_map_new (btu_oneshot_alarm_hash_ma
/**errornumberforfinshshell.**copyright (C) 2013,shanghaireal-threadtechnologyco.,ltd**this fileispartofRT-Thread (http://www.rt-thread.org) * Maintainer:bernard.xiongThis article is from the "mountain Ask the Boy" blog, please be sure to keep this source http://linpeng.blog.51cto.com/9779987/1685377Rt-thread finsh Source Analysis: Finsh_error.h
/**heapmanagementinfinshshell.**copyright (C) 2006-2013,rt-threaddevelopmentteam**thisfile ispartofRT-Thread (http://www.rt-thread.org) *Maintainer: bernard.xiongThis article is from the "mountain Ask the Boy" blog, please be sure to keep this source http://linpeng.blog.51cto.com/9779987/1685401Rt-thread finsh Source Analysis: Finsh_heap.h
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