thread dump analysis

executing the Wait,sleep,join method will throw interruptedexception, if the normal state, we can through isinterrupted () =true, To stop the thread from using the return method.(vii) Start and run methods for threadsNote that for a thread to run, only the Start method is executed, this method is the native method, the Run method is where we define the task, and a separate call to the Run method is the sam

uses traversal to solve multi-task results, but is not the optimal effect, Futuretask is the existence of this, it has a callback function protected void done (), when the task ends, the callback function will be triggered. So simply overloading the function allows you to do something at the end of the thread.The code is as follows:1 Public classTest {2 Public Static voidMain (string[] args) {3Executorservice executor =Executors.newcachedthreadpool ();4 for(inti=0; i) {5callableN

For wait and sleep it would seem to block threads, but they are really a big difference, so here's a little bit of discussion: Difference one, Sleep () is the method inside the thread, and wait () is the method of the object class.This is relatively simple, directly read the code will know: The difference between the sleep () method does not need to be awakened by the Notify, while wait () requires "Of course wait (10) except in such cases".T

PHP multi-thread programming-analysis of pipeline communication instances. PHP multi-thread programming-pipeline communication example analysis this article mainly introduces PHP multi-thread programming-pipeline communication, the example analyzes the pipeline communication

Iis6.0 Log File Analysis code _ 3 the thread reads files to the database (tested), but lacks the ability to store log files in batch. defines an array. list of stored files. read files to the database in order. reviewed thread operations. array Control. key technologies such as file access and database operations. // Processing logic for batch log files:// Method

Next, in the last article introduced the thread pool design requirements and use, here we analyze the concurrent package thread pool implementation class Threadpoolexecutor design, is not feel meaningless, people have realized also analysis what? Of course is to improve our own design capabilities. For the improvement of the design ability, I think we should be a

Simple analysis and use of Thread Local Storage (TLS) In multi-threaded programming, if multiple threads need to share access to the same variable, the variable can be declared using the keyword volatile. If a variable does not want to share access among multiple threads, so what should we do? Ha, this method is TLS, local thread storage. it is very simple to

Method:void **ret;Pthread_join (thread, ret);Cause: There is a sentence of type such as Pthread_join: (* value_ptr) = arg; If you pass the parameter in the correct way, the statement on the left actually completes the operation: ret = arg; However, when parameters are passed in the wrong way, a fatal error occurs: (* value_ptr), which takes a value operation on a pointer that has not yet been initialized, which is not allowed by the system, at which

/fork.c 1363\n");}Probe kernel.statement ("* @kernel/fork.c:1369"){printf ("in kernel/fork.c 1369\n");}Probe kernel.statement ("* @kernel/fork.c:1373"){printf ("in kernel/fork.c 1373\n");}Probe kernel.function ("Copy_process"). return{printf ("Copy_process return%d\n", $return)}function Check_null_pid:long (Addr:long){struct PID *p;p = (struct pid*) this->l_addr;if (p = = NULL)This->__retvalue = 0;ElseThis->__retvalue = 1;}Probe kernel.function ("Alloc_pid"){printf ("Alloc_pid init\n");}Probe ke

); return 0; } I'm not going to explain the content, we look directly at the thread stack.We see that the bottom of the Getmodulehandlew is still inside the loader function. and in the loader function into the Ldrlockloderlock, the function inside to enter the PEB loaderlock critical section. However, the critical area is occupied by the main thread (before calling DllMain to enter the critica

) VirtualAlloc (NULL,sizeof (__functionx64) + sizeof (wow64context), mem_reserve| Mem_commit, Page_execute_readwrite);if (! FunctionX64) {printf ("VirtualAlloc () error\r\n"); Copy over the wow64->x64 stubmemcpy (ExecuteX64, __executexx64, sizeof (__executexx64));//copy over the native X functionmemcpy (FunctionX64, __functionx64, sizeof (__functionx64)),//2. Setting the upper and lower context Wow64context = (wow64context *) ((byte*) FunctionX64 + sizeof (__functionx64)); Wow64context->u1. Proc

execution of the 1,2,3,4 is not necessarily.If executed asynchronously, the same is true, the 1,2,3,4block is executed in a variable order, but the function returns immediately.Operation Result:Even if the main thread is blocked, the 1,2,3,4 will execute normally.Scenario 3:The block for synchronous execution of the home column does not execute because the current run loop does not end. Because it is synchronous, the following ====3 are not executed.

(command)) { if (runstate! = RUNNING | | poolsize = = 0) ensurequeuedtaskhandled (command); } else if (!addifundermaximumpoolsize command) reject (command);//is shutdown or saturated } } Private Boolean addifundercorepoolsize (Runnable firsttask) { Thread t = null; Final Reentrantlock mainlock = This.mainlock; Mainlock.lock (); try {

Java thread start () and run () method analysis, threadstart1. start () methodTo start the thread and realize multi-threaded running. In this case, you do not have to wait until the run method code is executed successfully and directly continue to execute the following code:Start a Thread by calling the start () method