{"id":14681,"date":"2024-03-15T09:43:55","date_gmt":"2024-03-15T09:43:55","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-parallel-processing-using-multithreading-in-the-c-language\/"},"modified":"2025-08-06T12:00:38","modified_gmt":"2025-08-06T12:00:38","slug":"what-is-the-method-for-parallel-processing-using-multithreading-in-the-c-language","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-for-parallel-processing-using-multithreading-in-the-c-language\/","title":{"rendered":"C Multithreading: Parallel Processing Guide"},"content":{"rendered":"<p>In C programming language, you can utilize the pthread library to achieve parallel processing with multiple threads. The specific steps are as follows:<\/p>\n<ol>\n<li>Include the header file: Include the pthread.h header file in the code, which contains declarations for functions and data types related to multi-threading.<\/li>\n<li>Creating threads: Use the pthread_create function to create threads. This function requires parameters such as a pointer to a thread identifier, thread attributes, and a pointer to a function that is to be executed by the newly created thread.<\/li>\n<li>Define a thread function: You need to define a function that will serve as the entry point for the thread, and which will be executed in the newly created thread.<\/li>\n<li>Start thread: After creating a thread using the pthread_create function, use the pthread_join function to wait for the completion of the thread. This function takes the thread identifier as a parameter and waits for the thread specified by the identifier to terminate.<\/li>\n<\/ol>\n<p>Below is a simple example code demonstrating how to create and start two threads using the pthread library.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdio.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;pthread.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-comment\">\/\/ \u7ebf\u7a0b\u51fd\u65701<\/span>\r\n<span class=\"hljs-type\">void<\/span>* <span class=\"hljs-title function_\">thread_func1<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">void<\/span>* arg)<\/span> {\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Thread 1\\n\"<\/span>);\r\n    pthread_exit(<span class=\"hljs-literal\">NULL<\/span>);\r\n}\r\n\r\n<span class=\"hljs-comment\">\/\/ \u7ebf\u7a0b\u51fd\u65702<\/span>\r\n<span class=\"hljs-type\">void<\/span>* <span class=\"hljs-title function_\">thread_func2<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">void<\/span>* arg)<\/span> {\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Thread 2\\n\"<\/span>);\r\n    pthread_exit(<span class=\"hljs-literal\">NULL<\/span>);\r\n}\r\n\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">()<\/span> {\r\n    <span class=\"hljs-type\">pthread_t<\/span> tid1, tid2; <span class=\"hljs-comment\">\/\/ \u7ebf\u7a0b\u6807\u8bc6\u7b26<\/span>\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u521b\u5efa\u7ebf\u7a0b1<\/span>\r\n    pthread_create(&amp;tid1, <span class=\"hljs-literal\">NULL<\/span>, thread_func1, <span class=\"hljs-literal\">NULL<\/span>);\r\n    <span class=\"hljs-comment\">\/\/ \u521b\u5efa\u7ebf\u7a0b2<\/span>\r\n    pthread_create(&amp;tid2, <span class=\"hljs-literal\">NULL<\/span>, thread_func2, <span class=\"hljs-literal\">NULL<\/span>);\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u7b49\u5f85\u7ebf\u7a0b1\u7684\u5b8c\u6210<\/span>\r\n    pthread_join(tid1, <span class=\"hljs-literal\">NULL<\/span>);\r\n    <span class=\"hljs-comment\">\/\/ \u7b49\u5f85\u7ebf\u7a0b2\u7684\u5b8c\u6210<\/span>\r\n    pthread_join(tid2, <span class=\"hljs-literal\">NULL<\/span>);\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>In the example above, we created two threads to run functions thread_func1 and thread_func2. Finally, in the main thread, we used the pthread_join function to wait for the completion of both threads. It should be noted that the different threads run in parallel, and their execution order is not guaranteed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In C programming language, you can utilize the pthread library to achieve parallel processing with multiple threads. The specific steps are as follows: Include the header file: Include the pthread.h header file in the code, which contains declarations for functions and data types related to multi-threading. Creating threads: Use the pthread_create function to create threads. [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[381,398,492,1400,19836],"class_list":["post-14681","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c-programming","tag-concurrency","tag-multithreading","tag-parallel-processing","tag-pthread"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C Multithreading: Parallel Processing Guide - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn parallel processing in C using pthread. 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