【Linux】巧妙運(yùn)用＜信號(hào)量＞解決＜水果放取問題＞（思維導(dǎo)圖＆代碼演示＆思路解析）

https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15binclude <stdio.h> https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15binclude <stdlib.h> https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15binclude <pthread.h> https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15binclude <semaphore.h> https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15binclude <unistd.h>  https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15bdefine APPLE 1 https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15bdefine ORANGE 2  // 表示放入水果 int fruitOnPlate = 0; int fruitType = 0;  // 設(shè)置信號(hào)量 sem_t plate, appleReady, orangeReady;  void *father(void *arg) {     while (1) {         sem_wait(&plate);         fruitOnPlate = 1;         fruitType = APPLE;  // 放入蘋果         printf("Father put an apple.n");         sem_post(&appleReady);         sleep(rand() % 10); // 睡眠隨機(jī)時(shí)間     } }  void *mother(void *arg) {     while (1) {         sem_wait(&plate);         fruitOnPlate = 1;         fruitType = ORANGE;  // 放入橘子         printf("Mother put an orange.n");         sem_post(&orangeReady);         sleep(rand() % 10); // 睡眠隨機(jī)時(shí)間     } }  void *son(void *arg) {     while (1) {         sem_wait(&orangeReady); // 等待橘子         if (fruitType == ORANGE) {             printf("Son ate an orange.n");             sem_post(&plate);         }     } }  void *daughter(void *arg) {     while (1) {         sem_wait(&appleReady); // 等待蘋果         if (fruitType == APPLE) {             printf("Daughter ate an apple.n");             sem_post(&plate);         }     } }  int main() {     pthread_t f_thread, m_thread, son_thread, dau_thread;      sem_init(&plate, 0, 1);     sem_init(&appleReady, 0, 0);     sem_init(&orangeReady, 0, 0);      pthread_create(&f_thread, NULL, father, NULL);     pthread_create(&m_thread, NULL, mother, NULL);     pthread_create(&son_thread, NULL, son, NULL);     pthread_create(&dau_thread, NULL, daughter, NULL);      pthread_join(f_thread, NULL);     pthread_join(m_thread, NULL);     pthread_join(son_thread, NULL);     pthread_join(dau_thread, NULL);      sem_destroy(&plate);     sem_destroy(&appleReady);     sem_destroy(&orangeReady);      return 0; }