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fix bug in cpu_port.c(can work very well)

This commit is contained in:
prife 2013-01-15 23:59:14 +08:00
parent 395178ebfa
commit b8bd5c8309
1 changed files with 16 additions and 6 deletions
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22
libcpu/sim/posix/cpu_port.c
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@ -157,7 +157,7 @@ static void *thread_run(void *parameter)
/* FIXME set signal mask, mask the timer! */
signal_mask();
thread->status = SUSPEND_SIGWAIT;
thread->status = SUSPEND_LOCK;
TRACE("pid <%08x> stop on sem...\n", (unsigned int)(thread->pthread));
sem_wait(&thread->sem);
@ -289,6 +289,9 @@ void rt_hw_interrupt_enable(rt_base_t level)
thread_from->rtthread->name,
thread_to->rtthread->name);
cpu_pending_interrupts --;
thread_from->status = SUSPEND_LOCK;
pthread_mutex_unlock(ptr_int_mutex);
/* 唤醒被挂起的线程 */
if (thread_to->status == SUSPEND_SIGWAIT)
{
@ -303,9 +306,6 @@ void rt_hw_interrupt_enable(rt_base_t level)
printf("conswitch: should not be here! %d\n", __LINE__);
exit(EXIT_FAILURE);
}
cpu_pending_interrupts --;
thread_from->status = SUSPEND_LOCK;
pthread_mutex_unlock(ptr_int_mutex);
/* 挂起当前的线程 */
sem_wait(& thread_from->sem);
@ -325,9 +325,20 @@ void rt_hw_interrupt_enable(rt_base_t level)
(unsigned int)pid,
thread_from->rtthread->name,
thread_to->rtthread->name);
cpu_pending_interrupts --;
/* 需要把解锁函数放在前面,以防止死锁？？ */
pthread_mutex_unlock(ptr_int_mutex);
/* 挂起from线程 */
pthread_kill(thread_from->pthread, MSG_SUSPEND);
cpu_pending_interrupts --;
/* TODO 这里需要确保线程被挂起了, 否则304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 */
while (thread_from->status != SUSPEND_SIGWAIT)
{
sched_yield();
}
/* 唤醒to线程 */
if (thread_to->status == SUSPEND_SIGWAIT)
@ -344,7 +355,6 @@ void rt_hw_interrupt_enable(rt_base_t level)
exit(EXIT_FAILURE);
}
pthread_mutex_unlock(ptr_int_mutex);
}
/*TODO: It may need to unmask the signal */
}