what is the difference between processes and threads

最新推荐文章于 2023-01-12 15:39:56 发布

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最新推荐文章于 2023-01-12 15:39:56 发布

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本文详细解释了程序、进程和线程之间的区别。程序是指静态的代码集合；进程则是程序的一次执行过程，包含了计数器、堆栈、数据及资源；线程是进程中单一的执行序列，拥有自己的私有堆栈并共享堆区。

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this is the classic interview question,well, in addition ,to begin with it ,let us discuss what is difference for program ,process, thread?

program,it is the certain amount of the static codes ,it does not environment to support it to start to run ,so it does not occupy the memory.

progress, it is the an execution of the program. nowadays , most of the operation systems are the multiple tasks , multiple users systems .the process consists counter ,stack , data and resource. in order to make the multiple tasks run at the same time , a process consists one to many threads ,one thread only resides in one process.

thread is a single execution sequence within a process. threads have their own private stack and share the heap with each other .so it is the thread safe for thread local variables ,it is not thread safe to the global variables .it should synchronize the heap