Master the skills of Go statements in C language

Using Go statements in C language is a common and flexible programming technique that can achieve concurrent execution. The following will introduce some techniques for mastering Go statements in C language, with specific code examples.

First, we need to understand how to simulate concurrent execution in C language. In C language, concurrent operations can be achieved by creating multiple threads. In multi-threaded programming, we can use the pthread library to create and manage threads. Next is a simple C language program in which two threads are created and executed concurrently:

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

void *thread_func(void *arg) {
    for(int i = 0; i < 5; i++) {
        printf("Thread %d is running
", (int)arg);
    }
    pthread_exit(NULL);
}

int main() {
    pthread_t thread1, thread2;

    pthread_create(&thread1, NULL, thread_func, (void *)1);
    pthread_create(&thread2, NULL, thread_func, (void *)2);

    pthread_join(thread1, NULL);
    pthread_join(thread2, NULL);

    return 0;
}

In the above example, we created two threads and executed them respectively thread_funcFunction simulates the effect of concurrent execution. However, in a real program, creating and managing multiple threads can add complexity and overhead.

In order to implement concurrent operations more concisely and efficiently, we can use Go statements in C language. In C language, Go statements can be implemented through macro definitions and thread pools. The following is a sample code that uses macro definitions and thread pools to implement Go statements:

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

#define MAX_THREADS 10

void *task_func(void *arg) {
    int task_id = *(int *)arg;
    printf("Task %d is running
", task_id);
    pthread_exit(NULL);
}

void Go(void (*func)(void *), void *arg) {
    pthread_t thread;
    pthread_create(&thread, NULL, func, arg);
    pthread_join(thread, NULL);
}

int main() {
    for (int i = 0; i < MAX_THREADS; i++) {
        int *arg = (int *)malloc(sizeof(int));
        *arg = i;
        Go(task_func, arg);
    }

    return 0;
}

In the above example, we define a Go macro to create and execute a new thread . By calling the Go macro, we can implement simple Go statements so that tasks can be executed concurrently while avoiding the complexity of multi-thread management.

In summary, mastering the skills of Go statements in C language is an important programming skill. With appropriate techniques and code examples, we can implement concurrent operations more flexibly and efficiently, improving program performance and response speed. I hope the above content can help you better understand and apply the programming technique of Go statements.

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