Linux使用线程池实现快速排序

好的，下面是一个简单的示例代码，使用线程池实现快速排序：

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

#define MAX_THREADS 100
#define MAX_SIZE 10000

pthread_t threads[MAX_THREADS];
pthread_mutex_t mutex;

int thread_count = 0;

typedef struct {
    int* array;
    int left;
    int right;
} thread_arg;

typedef struct {
    thread_arg* args;
    int count;
} sort_args;

void* sort_thread(void* arg) {
    thread_arg* t_arg = (thread_arg*) arg;
    int* array = t_arg->array;
    int left = t_arg->left;
    int right = t_arg->right;
    int pivot = array[right];
    int i = left - 1;

    for (int j = left; j < right; j++) {
        if (array[j] <= pivot) {
            i++;
            int temp = array[i];
            array[i] = array[j];
            array[j] = temp;
        }
    }

    int temp = array[i + 1];
    array[i + 1] = array[right];
    array[right] = temp;

    int new_left = left;
    int new_right = right;

    if (left < i) {
        new_left = left;
        new_right = i;
        thread_arg* new_arg = (thread_arg*) malloc(sizeof(thread_arg));
        new_arg->array = array;
        new_arg->left = new_left;
        new_arg->right = new_right;
        pthread_mutex_lock(&mutex);
        threads[thread_count++] = 0;
        pthread_mutex_unlock(&mutex);
        pthread_create(&threads[thread_count - 1], NULL, sort_thread, (void*)new_arg);
    }

    if (i + 2 < right) {
        new_left = i + 2;
        new_right = right;
        thread_arg* new_arg = (thread_arg*) malloc(sizeof(thread_arg));
        new_arg->array = array;
        new_arg->left = new_left;
        new_arg->right = new_right;
        pthread_mutex_lock(&mutex);
        threads[thread_count++] = 0;
        pthread_mutex_unlock(&mutex);
        pthread_create(&threads[thread_count - 1], NULL, sort_thread, (void*)new_arg);
    }

    pthread_exit(NULL);
}

void quicksort(int* array, int left, int right) {
    if (left < right) {
        int pivot = array[right];
        int i = left - 1;

        for (int j = left; j < right; j++) {
            if (array[j] <= pivot) {
                i++;
                int temp = array[i];
                array[i] = array[j];
                array[j] = temp;
            }
        }

        int temp = array[i + 1];
        array[i + 1] = array[right];
        array[right] = temp;

        if (thread_count < MAX_THREADS) {
            int new_left = left;
            int new_right = right;

            if (left < i) {
                new_left = left;
                new_right = i;
                thread_arg* new_arg = (thread_arg*) malloc(sizeof(thread_arg));
                new_arg->array = array;
                new_arg->left = new_left;
                new_arg->right = new_right;
                pthread_mutex_lock(&mutex);
                threads[thread_count++] = 0;
                pthread_mutex_unlock(&mutex);
                pthread_create(&threads[thread_count - 1], NULL, sort_thread, (void*)new_arg);
            }

            if (i + 2 < right) {
                new_left = i + 2;
                new_right = right;
                thread_arg* new_arg = (thread_arg*) malloc(sizeof(thread_arg));
                new_arg->array = array;
                new_arg->left = new_left;
                new_arg->right = new_right;
                pthread_mutex_lock(&mutex);
                threads[thread_count++] = 0;
                pthread_mutex_unlock(&mutex);
                pthread_create(&threads[thread_count - 1], NULL, sort_thread, (void*)new_arg);
            }
        } else {
            quicksort(array, left, i);
            quicksort(array, i + 2, right);
        }
    }
}

void parallel_quicksort(int* array, int left, int right) {
    thread_count = 0;
    pthread_mutex_init(&mutex, NULL);
    thread_arg* arg = (thread_arg*) malloc(sizeof(thread_arg));
    arg->array = array;
    arg->left = left;
    arg->right = right;
    threads[thread_count++] = 0;
    pthread_create(&threads[thread_count - 1], NULL, sort_thread, (void*)arg);

    for (int i = 0; i < thread_count; i++) {
        pthread_join(threads[i], NULL);
    }

    pthread_mutex_destroy(&mutex);
}

int main() {
    int array[MAX_SIZE];
    int n;

    printf("Enter the number of elements: ");
    scanf("%d", &n);

    for (int i = 0; i < n; i++) {
        printf("Enter element %d: ", i + 1);
        scanf("%d", &array[i]);
    }

    parallel_quicksort(array, 0, n - 1);

    printf("Sorted array: ");

    for (int i = 0; i < n; i++) {
        printf("%d ", array[i]);
    }

    printf("\n");

    return 0;
}

该示例代码使用了线程池来实现多线程快速排序。当线程池中的线程数量达到最大值时，程序将使用递归方式继续排序。在 `parallel_quicksort` 函数中，程序初始化了一个互斥锁（`mutex`），然后创建一个线程来执行快速排序。在 `sort_thread` 函数中，线程完成了数组的排序，并根据情况创建新的线程来继续排序。在整个程序执行期间，主线程会等待所有线程都执行完毕后再退出。