![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260815091732-6a802eac88cbc.png\")
<\/p>\n<\/p>\n
\u8981\u5728 C++ \u4e2d\u4f7f\u7528\u8bfb\u5199\u9501（read-write lock）\u6765\u6a21\u62df\u94f6\u884c\u8d26\u6237\u7ba1\u7406\u7cfb\u7edf，\u6211\u4eec\u9700\u8981\u4f7f\u7528\u9002\u5f53\u7684\u540c\u6b65\u673a\u5236\u6765\u786e\u4fdd\u591a\u7ebf\u7a0b\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u65f6\u7684\u5b89\u5168\u6027\u3002C++ \u6807\u51c6\u5e93\u63d0\u4f9b\u4e86 std::shared_mutex \u6765\u5b9e\u73b0\u8bfb\u5199\u9501，\u5b83\u5141\u8bb8\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8bfb\u53d6\u5171\u4eab\u8d44\u6e90，\u4f46\u5728\u5199\u5165\u65f6，\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u8bbf\u95ee\u8d44\u6e90\u3002<\/p>\n
\u6211\u4eec\u5c06\u901a\u8fc7 std::shared_mutex \u6765\u7ba1\u7406\u5bf9\u94f6\u884c\u8d26\u6237\u4f59\u989d（balance）\u7684\u8bfb\u5199\u8bbf\u95ee\u3002\u6a21\u62df\u7684\u6b65\u9aa4\u5982\u4e0b：<\/p>\n
#include <iostream>
\n#include <thread>
\n#include <shared_mutex>
\n#include <cstdlib>
\n#include <ctime>
\n#include <unistd.h> \/\/ For sleep()<\/p>\n
using namespace std;<\/p>\n
\/\/ \u5b9a\u4e49\u5171\u4eab\u8d44\u6e90：\u8d26\u6237\u4f59\u989d\u548c\u8bfb\u5199\u9501
\nint balance = 1000;
\nstd::shared_mutex balance_mutex; \/\/ \u8bfb\u5199\u9501<\/p>\n
\/\/ \u8bfb\u64cd\u4f5c：\u67e5\u770b\u4f59\u989d
\nvoid check_balance() {
\n std::shared_lock<std::shared_mutex> lock(balance_mutex); \/\/ \u5171\u4eab\u8bfb\u9501
\n cout << "Current balance: " << balance << endl;
\n}<\/p>\n
\/\/ \u5199\u64cd\u4f5c：\u5b58\u6b3e
\nvoid deposit(int amount) {
\n std::unique_lock<std::shared_mutex> lock(balance_mutex); \/\/ \u72ec\u5360\u5199\u9501
\n balance += amount;
\n cout << "Deposited " << amount << ". New balance: " << balance << endl;
\n}<\/p>\n
\/\/ \u5199\u64cd\u4f5c：\u53d6\u6b3e
\nvoid withdraw(int amount) {
\n std::unique_lock<std::shared_mutex> lock(balance_mutex); \/\/ \u72ec\u5360\u5199\u9501
\n if (balance >= amount) {
\n balance -= amount;
\n cout << "Withdrew " << amount << ". New balance: " << balance << endl;
\n } else {
\n cout << "Insufficient funds for withdrawal of " << amount << endl;
\n }
\n}<\/p>\n
\/\/ \u6a21\u62df\u4fee\u6539\u4f59\u989d\u7684\u7ebf\u7a0b
\nvoid modify_balance(int iteration) {
\n srand(time(0) + iteration); \/\/ \u4e3a\u6bcf\u4e2a\u7ebf\u7a0b\u8bbe\u5b9a\u4e0d\u540c\u7684\u968f\u673a\u79cd\u5b50<\/p>\n
\/\/ \u6a21\u62df\u5b58\u6b3e
\n int deposit_amount = rand() % 201 – 100; \/\/ \u968f\u673a\u5b58\u6b3e\u6216\u53d6\u6b3e（-100 \u5230 100）
\n if (deposit_amount >= 0) {
\n deposit(deposit_amount);
\n } else {
\n withdraw(-deposit_amount); \/\/ \u8d1f\u6570\u8868\u793a\u53d6\u6b3e
\n }<\/p>\n
\/\/ \u4f11\u77201\u79d2，\u6a21\u62df\u5176\u4ed6\u64cd\u4f5c
\n sleep(1);
\n}<\/p>\n
int main() {
\n \/\/ \u521b\u5efa\u591a\u4e2a\u7ebf\u7a0b\u6a21\u62df\u94f6\u884c\u8d26\u6237\u7684\u64cd\u4f5c
\n thread t1(modify_balance, 1);
\n thread t2(modify_balance, 2);
\n thread t3(modify_balance, 3);
\n thread t4(modify_balance, 4);
\n thread t5(modify_balance, 5);<\/p>\n
\/\/ \u540c\u65f6\u67e5\u770b\u4f59\u989d（\u6a21\u62df\u591a\u4e2a\u8bfb\u7ebf\u7a0b）
\n thread reader1(check_balance);
\n thread reader2(check_balance);
\n thread reader3(check_balance);<\/p>\n
\/\/ \u7b49\u5f85\u6240\u6709\u7ebf\u7a0b\u6267\u884c\u5b8c\u6210
\n t1.join();
\n t2.join();
\n t3.join();
\n t4.join();
\n t5.join();
\n reader1.join();
\n reader2.join();
\n reader3.join();<\/p>\n
cout << "Final balance: " << balance << endl;
\n return 0;
\n}<\/p>\n
1\u3001\u5171\u4eab\u8d44\u6e90<\/p>\n
2\u3001\u64cd\u4f5c<\/p>\n
3\u3001\u591a\u7ebf\u7a0b<\/p>\n
4\u3001\u9501\u7684\u4f7f\u7528<\/p>\n
5\u3001\u6a21\u62df\u5e76\u53d1\u64cd\u4f5c<\/p>\n
\u6bcf\u6b21\u8fd0\u884c\u7a0b\u5e8f\u65f6，\u7a0b\u5e8f\u4f1a\u5e76\u53d1\u6267\u884c\u5b58\u6b3e\u548c\u53d6\u6b3e\u64cd\u4f5c，\u5e76\u4e14\u6709\u591a\u4e2a\u7ebf\u7a0b\u5728\u540c\u65f6\u8bfb\u53d6\u8d26\u6237\u4f59\u989d\u3002\u901a\u8fc7\u8bfb\u5199\u9501，\u786e\u4fdd\u4e86\u6570\u636e\u7684\u6b63\u786e\u6027\u548c\u7ebf\u7a0b\u5b89\u5168\u3002<\/p>\n
```cpp
\n#include<stdio.h>
\n#include<stdlib.h>
\n#include<string.h>
\n#include<unistd.h>
\n#include<pthread.h>
\n#include<fcntl.h>
\n#include<sys\/stat.h>
\n#include<errno.h>
\n#include<sys\/wait.h>
\n#include<mqueue.h>
\n#include<time.h><\/p>\n
int balance = 1000;
\npthread_rwlock_t rwlock;<\/p>\n
void *select_balance(void *arg) {
\n pthread_rwlock_rdlock(&rwlock);
\n sleep(rand() % 3 + 1);
\n printf("balance: %d\\\\n", balance);
\n pthread_rwlock_unlock(&rwlock);
\n return NULL;
\n}<\/p>\n
void *modify_balance(void *arg) {
\n pthread_rwlock_wrlock(&rwlock);
\n sleep(1);
\n balance += atoi((char *)arg);
\n printf("modify: %d, balance: %d\\\\n", atoi((char *)arg), balance);
\n pthread_rwlock_unlock(&rwlock);
\n return NULL;
\n}<\/p>\n
int main(int argc, char *argv[])
\n{
\n if (argc != 6) {
\n printf("\u53c2\u6570\u6570\u91cf\u9519\u8bef，\u6b63\u786e\u53c2\u6570\u6570\u91cf\u5e94\u4e3a5\u4e2a！\\\\n");
\n return -1;
\n }
\n pthread_rwlock_init(&rwlock, NULL);
\n srand(time(NULL));
\n pthread_t tid[15];
\n for (int i = 0; i < 5; i++) {
\n pthread_create(&tid[i], NULL, modify_balance, argv[i + 1]);
\n }
\n for (int i = 5; i < 15; i++) {
\n pthread_create(&tid[i], NULL, select_balance, NULL);
\n }
\n for (int i = 0; i < 15; i++) {
\n pthread_join(tid[i], NULL);
\n }
\n pthread_rwlock_destroy(&rwlock);<\/p>\n
return 0;
\n}<\/p>\n","protected":false},"excerpt":{"rendered":"
\u8981\u5728 C \u4e2d\u4f7f\u7528\u8bfb\u5199\u9501（read-write lock）\u6765\u6a21\u62df\u94f6\u884c\u8d26\u6237\u7ba1\u7406\u7cfb\u7edf，\u6211\u4eec\u9700\u8981\u4f7f\u7528\u9002\u5f53\u7684\u540c\u6b65\u673a\u5236\u6765\u786e\u4fdd\u591a\u7ebf\u7a0b\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u65f6\u7684\u5b89\u5168\u6027\u3002C \u6807\u51c6\u5e93\u63d0\u4f9b\u4e86 std::shared_mutex \u6765\u5b9e\u73b0\u8bfb\u5199\u9501，\u5b83\u5141\u8bb8\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8bfb\u53d6\u5171\u4eab\u8d44\u6e90，\u4f46\u5728\u5199\u5165\u65f6，\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u8bbf\u95ee\u8d44\u6e90\u3002\u8bfb\u5199\u9501\u7684\u5de5\u4f5c\u539f\u7406\u8bfb\u9501：\u591a\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u540c\u65f6\u6301\u6709\u8bfb\u9501\u5e76\u8bbf\u95ee\u8d44\u6e90，\u524d\u63d0\u662f\u6ca1\u6709\u7ebf\u7a0b\u6301\u6709\u5199\u9501\u3002\u5199\u9501&<\/p>\n","protected":false},"author":2,"featured_media":94895,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[10187,10876,426,16],"topic":[],"class_list":["post-94896","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-codingplan","tag-10876","tag-jvm","tag-16"],"yoast_head":"\n