Conditional_wait() 如何在内核和硬件汇编级别实现

的文章：

c
#include 
pthread_mutex_t mutex;
pthread_cond_t cond;
int condition = 0;
void* thread_func(void* arg) {
    pthread_mutex_lock(&mutex);
    while (condition == 0) {
        pthread_cond_wait(&cond, &mutex);
    }
    pthread_mutex_unlock(&mutex);
    // 执行条件满足后的操作
}
int main() {
    pthread_t thread;
    pthread_mutex_init(&mutex, NULL);
    pthread_cond_init(&cond, NULL);
    pthread_create(&thread, NULL, thread_func, NULL);
    // 设置条件为真
    pthread_mutex_lock(&mutex);
    condition = 1;
    pthread_cond_signal(&cond);
    pthread_mutex_unlock(&mutex);
    pthread_join(thread, NULL);
    pthread_mutex_destroy(&mutex);
    pthread_cond_destroy(&cond);
    return 0;
}

assembly
section .data
    condition equ 0
    waiting equ 0
section .text
global _start
_start:
    ; 线程调用 Conditional_wait()
    mov eax, 1
    mov ebx, condition
    mov ecx, waiting
    int 0x80
    ; 条件满足后的操作
    ...
    ; 线程调用 Conditional_signal()
    mov eax, 2
    mov ebx, waiting
    int 0x80
    ; 继续执行
    ...