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A deep dive into Go statements in C language

In C language, Go statement is a special statement used for concurrent programming. It allows different parts of the program to run simultaneously during program execution, improving the efficiency and effectiveness of the program. performance. This article will delve into Go statements in C language and provide specific code examples to help readers understand better.

In C language, the traditional sequential execution method will cause the execution speed of the program to be limited, especially when processing large amounts of data or complex calculations. The introduction of Go statements allows different parts of the program to be executed in parallel, thus improving the overall operating efficiency. In C language, we can achieve concurrent execution by using threads, and the Go statement is the key statement used to start threads.

In C language, you can use the pthread_create function to create a new thread and execute the specified function. Here is a simple example showing how to use the pthread_create function to achieve concurrent execution:

#include <stdio.h>
#include <pthread.h>

void* thread_function(void *arg) {
    printf("This is a thread function
");
    return NULL;
}

int main() {
    pthread_t tid;
    
    pthread_create(&tid, NULL, thread_function, NULL);
    
    printf("Main function
");
    
    pthread_join(tid, NULL);
    
    return 0;
}

In the above code, the pthread_create function is used to create a new thread, and calls the thread_function function, in which "This is a thread function" is printed. In the main function, "Main function" will be printed, and then use pthread_join to wait for the new thread to complete execution.

Next, we will introduce how to use Go statements to achieve the same function. In C language, there is no built-in Go statement, but some libraries can be used to achieve similar functions. The following is an example using the libcoro library, showing how to use Go statements to achieve concurrent execution:

#include <stdio.h>
#include <coro.h>

coro_context thread_function(coro_context *self, void *arg) {
    printf("This is a thread function
");
    coro_yield(self);
}

int main() {
    coro_context ctx;
    ctx = coro_create(thread_function, NULL);
    
    printf("Main function
");
    
    coro_transfer(&coro_main, &ctx);
    
    coro_destroy(ctx);
    
    return 0;
}

In the above code, coro_context represents a coroutine , coro_create is used to create a coroutine and call the thread_function function, which prints "This is a thread function". In the main function, "Main function" will be printed, then use coro_transfer to switch to a new coroutine for execution, and finally destroy the coroutine.

Through the above code examples, we can see that using Go statements is more concise and efficient than traditional thread creation. The introduction of Go statements allows the program to use computing resources more flexibly, improving the performance and response speed of the program. It is hoped that readers can have a deeper understanding of the Go statements in C language through the introduction and sample code of this article, and use them flexibly in actual projects.

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