what mutex lock

First, introduceDefinition: In CPython, the global interpreter lock, or GIL, was a mutex that prevents multiple native threads from executing Python Bytecodes at once. This lock is necessary mainly because CPython ' s memory management are not

InnoDB is a multi-threaded concurrent storage engine, the internal read and write are implemented with multithreading, so innodb internal implementation of a relatively efficient concurrency synchronization mechanism. InnoDB does not directly use

1 IntroductionThreading (thread) technology was introduced in the 60 's, but the real application of multithreading to the operating system was in the middle of the 80 's, and Solaris was a leader in this area. Traditional UNIX also supports

------ Source code analysis-main program entry point (2) ------ Open Source Software Tor ---------------------------------------------------------- The second part only examines the five function call sequences following configure_backtrace_handler (

MySQL memory allocation-Quick Setting Solution If you only use the MyISAM storage engine, set key_buffer_size to 20% of the available memory (plus innodb_buffer_pool_size = 0) If you only use the InnoDB Storage engine, set innodb_buffer_pool_size to

Note: Part of this article comes from Version 6, [US] abraham silberschatz, Peter Baer Galvin, Greg Gagne, translated by Zheng jiegen. In case of any mistakes, I hope you can correct them. I would like to thank you first. A lock is a mechanism

1. Overview Gki to library libbt-brcm_gki.so (static Lib ?) To bluedroid. This layer is an adaptation layer that adapts to OS-related processes and memory-related management and can be used to transmit messages between threads.The gki_cb variable

With the development of the automotive industry, vehicle navigation devices have been applied more. For example, an on-board navigation device integrates the DVD function (which imposes high requirements on video processing and requires a

There are many synchronization mechanisms in the Linux kernel. The classic ones include spin_lock (waiting lock), mutex (mutex lock), semaphore (semaphore), and so on. And almost all of them have corresponding rw_xxx (read/write locks), so that the

I. Introduction In OpenMP, the thread synchronization mechanism includes the mutex lock synchronization mechanism and event synchronization mechanism. This section describes the atomic method in the mutex lock synchronization mechanism.   Ii. mutex

I. Priority and task Preemption Neutrino provides a priority-driven preemptible design concept. Priority-driven means that we can assign a priority to each thread, which can obtain CPU resources based on the priority scheduling policy. If a

Here, I will share some learning materials on the principles and source code of abstractqueuedsynchronizer. The core idea is simple. I suggest you search for AQS papers on the Internet and read the papers first, then, let's look at the source code

Synchronous Implementation of threads in Android C ++ and android threads Preface In Android C ++, thread synchronization mainly encapsulates the mutex and condition of pthread. So before learning, we recommend that you first understand the

IOS-multi-threaded applications and ios multi-threaded applicationsI. Share resources Shared resources: a resource in the memory is simultaneously accessed by multiple processes, and each process may modify the data of this resource. Problem: If

ArticleDirectory In multi-threaded programming, developers often encounter multiple threads to read and write a resource. This requires thread synchronization to ensure thread security. In general, our synchronization method is to use the

  Linux inter-process communication Overview Linux inter-process communication is mainly divided into the following four areas(1) message transmission (pipeline, FIFO, Message Queue)(2) synchronization (mutex lock, condition variable,

ArticleDirectory 1. Create a thread using a global function 2. Create a thread through a function object 3. Create a thread using a Lambda expression 4. Create a thread through the member function 1. mutex 2. Lock class 3.

Embedded Development Exchange Group 280352802, welcome to join! We have learned two ways to implement multiple tasks: process and thread. because the process is working in an independent memory space, different processes cannot directly access the

1. prerequisites: thread, mutex lock, semaphore: Create a thread intpthread_create (pthread_t * restricttidp, optional * restrictattr, void * (* start_rtn) (void), void * restrictarg ); initialize the mutex intpthread_mutex_init (pthread_mutex_t *

Article title: master advanced: Linux kernel synchronization mechanism 2. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and