ת»»Ϊgb2312±àÂë

Project/Src/rt-thread/libcpu/sim/posix/cpu_port.c

@@ -39,7 +39,7 @@ typedef struct _thread
 #define INTERRUPT_ENABLE   0
 #define INTERRUPT_DISABLE  1
 
-/* 线程挂起状态，共两种取值 */
+/* <EFBFBD>̹߳<EFBFBD><EFBFBD><EFBFBD>״̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡֵ */
 #define SUSPEND_LOCK      0
 #define SUSPEND_SIGWAIT   1
 #define THREAD_RUNNING    2
@@ -103,20 +103,20 @@ static void thread_suspend_signal_handler(int sig)
     thread_from = (thread_t *) rt_interrupt_from_thread;
     thread_to = (thread_t *) rt_interrupt_to_thread;
 
-    /* 注意！此时 rt_thread_self的值是to线程的值！ */
+    /* ע<EFBFBD>⣡<EFBFBD><EFBFBD>ʱ rt_thread_self<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD>to<EFBFBD>̵߳<EFBFBD>ֵ<EFBFBD><EFBFBD> */
     tid = rt_thread_self();
     /* FIXME RT_ASSERT(thread_from->pthread == pid); */
     RT_ASSERT((thread_t *)(tid->sp) == thread_to);
 
     TRACE("signal: SIGSUSPEND suspend <%s>\n", thread_from->rtthread->name);
 
-    /* 使用sigwait或者sigsuspend来挂起from线程  */
+    /* ʹ<EFBFBD><EFBFBD>sigwait<EFBFBD><EFBFBD><EFBFBD><EFBFBD>sigsuspend<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>from<EFBFBD>߳<EFBFBD>  */
     //sem_wait(&thread_from->sem);
     sigemptyset(&sigmask);
     sigaddset(&sigmask, MSG_RESUME);
 
-    /* Beginnig Linux Programming上说，当信号处理函数运行中，此信号就会被屏蔽，
-     * 以防止重复执行信号处理函数
+    /* Beginnig Linux Programming<EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>źŴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD>źžͻᱻ<EFBFBD><EFBFBD><EFBFBD>Σ<EFBFBD>
+     * <EFBFBD>Է<EFBFBD>ֹ<EFBFBD>ظ<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>źŴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
      */
     thread_from->status = SUSPEND_SIGWAIT;
     if (sigwait(&sigmask, &sig) != 0)
@@ -140,7 +140,7 @@ static void thread_resume_signal_handler(int sig)
     thread_from = (thread_t *) rt_interrupt_from_thread;
     thread_to = (thread_t *) rt_interrupt_to_thread;
 
-    /* 注意！此时 rt_thread_self的值是to线程的值！ */
+    /* ע<EFBFBD>⣡<EFBFBD><EFBFBD>ʱ rt_thread_self<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD>to<EFBFBD>̵߳<EFBFBD>ֵ<EFBFBD><EFBFBD> */
     tid = rt_thread_self();
     RT_ASSERT((thread_t *)(tid->sp) == thread_to);
 
@@ -171,9 +171,9 @@ static void *thread_run(void *parameter)
     thread->exit();
 
     /*TODO:
-     * 最后一行的pthread_exit永远没有机会执行，这是因为在threead->exit函数中
-     * 会发生线程切换，并永久将此pthread线程挂起，所以更完美的解决方案是在这
-	 * 里发送信号给主线程，主线程中再次唤醒此线程令其自动退出。
+     * <EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>е<EFBFBD>pthread_exit<EFBFBD><EFBFBD>Զû<EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>threead->exit<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+     * <EFBFBD>ᷢ<EFBFBD><EFBFBD><EFBFBD>߳<EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ý<EFBFBD><EFBFBD><EFBFBD>pthread<EFBFBD>̹߳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ը<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ľ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+	 * <EFBFBD>﷢<EFBFBD><EFBFBD><EFBFBD>źŸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>̣߳<EFBFBD><EFBFBD><EFBFBD><EFBFBD>߳<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٴλ<EFBFBD><EFBFBD>Ѵ<EFBFBD><EFBFBD>߳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Զ<EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD>
 	 */
     //sem_destroy(&thread->sem);
 
@@ -265,13 +265,13 @@ void rt_hw_interrupt_enable(rt_base_t level)
     interrupt_disable_flag = level;
 
     pthread_mutex_unlock(ptr_int_mutex);
-    /* 如果已经中断仍然关闭 */
+    /* <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD>ر<EFBFBD> */
     if (interrupt_disable_flag)
     {
         return;
     }
 
-    /* 表示当前中断打开, 检查是否有挂起的中断 */
+    /* <EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>ǰ<EFBFBD>жϴ<EFBFBD><EFBFBD><EFBFBD>, <20><><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><C7B7>й<EFBFBD><D0B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD> */
     pthread_mutex_lock(ptr_int_mutex);
     if (!cpu_pending_interrupts)
     {
@@ -287,9 +287,9 @@ void rt_hw_interrupt_enable(rt_base_t level)
     //pid != mainthread_pid &&
     if (thread_from->pthread == pid)
     {
-        /* 注意这段代码是在RTT普通线程函数总函数中执行的，
-         * from线程就是当前rtt线程 */
-        /* 需要检查是否有挂起的中断需要处理 */
+        /* ע<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>δ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>RTT<EFBFBD><EFBFBD>ͨ<EFBFBD>̺߳<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD>еģ<EFBFBD>
+         * from<EFBFBD>߳̾<EFBFBD><EFBFBD>ǵ<EFBFBD>ǰrtt<EFBFBD>߳<EFBFBD> */
+        /* <EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>й<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
         TRACE("conswitch: P in pid<%x> ,suspend <%s>, resume <%s>!\n",
               (unsigned int)pid,
               thread_from->rtthread->name,
@@ -298,7 +298,7 @@ void rt_hw_interrupt_enable(rt_base_t level)
         cpu_pending_interrupts --;
         thread_from->status = SUSPEND_LOCK;
         pthread_mutex_unlock(ptr_int_mutex);
-        /* 唤醒被挂起的线程 */
+        /* <EFBFBD><EFBFBD><EFBFBD>ѱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߳<EFBFBD> */
         if (thread_to->status == SUSPEND_SIGWAIT)
         {
             pthread_kill(thread_to->pthread, MSG_RESUME);
@@ -313,7 +313,7 @@ void rt_hw_interrupt_enable(rt_base_t level)
             exit(EXIT_FAILURE);
         }
 
-        /* 挂起当前的线程 */
+        /* <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>߳<EFBFBD> */
         sem_wait(& thread_from->sem);
         pthread_mutex_lock(ptr_int_mutex);
         thread_from->status = THREAD_RUNNING;
@@ -321,9 +321,9 @@ void rt_hw_interrupt_enable(rt_base_t level)
     }
     else
     {
-        /* 注意这段代码可能在多种情况下运行：
-         * 1. 在system tick中执行， 即主线程的SIGALRM信号处理函数中执行
-         * 2. 其他线程中调用，比如用于获取按键输入的线程中调用
+        /* ע<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>δ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD>
+         * 1. <EFBFBD><EFBFBD>system tick<EFBFBD><EFBFBD>ִ<EFBFBD>У<EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD>̵߳<DFB3>SIGALRM<52>źŴ<C5BA><C5B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><D6B4>
+         * 2. <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߳<EFBFBD><EFBFBD>е<EFBFBD><EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڻ<EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߳<EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>
          */
         TRACE("conswitch: S in pid<%x>  ,suspend <%s>, resume <%s>!\n",
               (unsigned int)pid,
@@ -332,19 +332,19 @@ void rt_hw_interrupt_enable(rt_base_t level)
 
         cpu_pending_interrupts --;
 
-        /* 需要把解锁函数放在前面,以防止死锁？？ */
+        /* <EFBFBD><EFBFBD>Ҫ<EFBFBD>ѽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD>,<2C>Է<EFBFBD>ֹ<EFBFBD><D6B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
         pthread_mutex_unlock(ptr_int_mutex);
 
-        /* 挂起from线程 */
+        /* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>from<EFBFBD>߳<EFBFBD> */
         pthread_kill(thread_from->pthread, MSG_SUSPEND);
-        /* 注意：这里需要确保线程被挂起了, 否则312行就很可能就会报错退出
-         * 因为这里挂起线程是通过信号实现的，所以一定要确保线程挂起才行 */
+        /* ע<EFBFBD>⣺<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫȷ<EFBFBD><EFBFBD><EFBFBD>̱߳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>, <20><><EFBFBD><EFBFBD>312<31>оͺܿ<CDBA><DCBF>ܾͻᱨ<CDBB><E1B1A8><EFBFBD>˳<EFBFBD>
+         * <EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߳<EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD>ź<EFBFBD>ʵ<EFBFBD>ֵģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ҫȷ<EFBFBD><EFBFBD><EFBFBD>̹߳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
         while (thread_from->status != SUSPEND_SIGWAIT)
         {
             sched_yield();
         }
 
-        /* 唤醒to线程 */
+        /* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>to<EFBFBD>߳<EFBFBD> */
         if (thread_to->status == SUSPEND_SIGWAIT)
         {
             pthread_kill(thread_to->pthread, MSG_RESUME);
@@ -374,7 +374,7 @@ void rt_hw_context_switch(rt_uint32_t from,
     RT_ASSERT(from != to);
 
 #if 0
-    //TODO: 可能还需要考虑嵌套切换的情况
+    //TODO: <EFBFBD><EFBFBD><EFBFBD>ܻ<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƕ<EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
     if (rt_thread_switch_interrupt_flag != 1)
     {
         rt_thread_switch_interrupt_flag = 1;
@@ -387,8 +387,8 @@ void rt_hw_context_switch(rt_uint32_t from,
     rt_interrupt_from_thread = *((rt_uint32_t *)from);
     rt_interrupt_to_thread = *((rt_uint32_t *)to);
 
-    /* 这个函数只是并不会真正执行中断处理函数，而只是简单的
-     * 设置一下中断挂起标志位
+    /* <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD>Dz<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>жϴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD>Ǽ򵥵<EFBFBD>
+     * <EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>жϹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־λ
      */
     cpu_pending_interrupts ++;
     pthread_mutex_unlock(ptr_int_mutex);
@@ -409,7 +409,7 @@ void rt_hw_context_switch_to(rt_uint32_t to)
     rt_interrupt_from_thread = 0;
 
     //set interrupt to 1
-    rt_thread_switch_interrupt_flag = 0; //TODO: 还需要考虑这个嵌套切换的情况
+    rt_thread_switch_interrupt_flag = 0; //TODO: <EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƕ<EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 
     /* enable interrupt
      * note: NOW, there are only one interrupt in simposix: system tick */
@@ -435,7 +435,7 @@ static int mainthread_scheduler(void)
     mainthread_pid = pthread_self();
     TRACE("pid <%08x> mainthread\n", (unsigned int)(mainthread_pid));
 
-    /* 屏蔽suspend信号和resume信号 */
+    /* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>suspend<EFBFBD>źź<EFBFBD>resume<EFBFBD>ź<EFBFBD> */
     sigemptyset(&sigmask);
     sigaddset(&sigmask, MSG_SUSPEND);
     sigaddset(&sigmask, MSG_RESUME);
@@ -472,7 +472,7 @@ static int mainthread_scheduler(void)
         pause();
 #endif
         TRACE("mthread:got sig %d\n", sig);
-        /* signal mask sigalrm  屏蔽SIGALRM信号 */
+        /* signal mask sigalrm  <EFBFBD><EFBFBD><EFBFBD><EFBFBD>SIGALRM<EFBFBD>ź<EFBFBD> */
         pthread_sigmask(SIG_BLOCK, &sigmask, &oldmask);
 
         // if (systick_signal_flag != 0)
@@ -487,7 +487,7 @@ static int mainthread_scheduler(void)
             TRACE("try lock failed.\n");
         }
 
-        /* 开启SIGALRM信号 */
+        /* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>SIGALRM<EFBFBD>ź<EFBFBD> */
         pthread_sigmask(SIG_UNBLOCK, &sigmask, &oldmask);
     }