re-write the rt_hw_interrupt_enable/disable

This commit is contained in:
prife 2013-01-14 14:14:40 +08:00
parent 5685a395be
commit 7b42f926a0
1 changed files with 89 additions and 76 deletions

View File

@ -1,6 +1,6 @@
/* /*
* author : prife (goprife@gmail.com) * author : prife (goprife@gmail.com)
* date : 2013/01/14 01:18:50 * date : 2013/01/14 01:18:50
* version: v 0.1.0 * version: v 0.1.0
*/ */
#include <rtthread.h> #include <rtthread.h>
@ -186,28 +186,96 @@ rt_uint8_t *rt_hw_stack_init(
return (rt_uint8_t *) thread; return (rt_uint8_t *) thread;
} }
static int dis_count;
static int en_count;
/* TODO: 此函数还没有真正实现 */
rt_base_t rt_hw_interrupt_disable(void) rt_base_t rt_hw_interrupt_disable(void)
{ {
long back; long back;
if (ptr_int_mutex == NULL)
{
return 0;
}
pthread_mutex_lock(ptr_int_mutex);
back = interrupt_disable_flag; back = interrupt_disable_flag;
interrupt_disable_flag = INTERRUPT_DISABLE; interrupt_disable_flag = INTERRUPT_DISABLE;
/*TODO: It may need to unmask the signal */ /*TODO: It may need to unmask the signal */
dis_count++;
return back; return back;
} }
/* TODO: 此函数还没有真正实现 */
void rt_hw_interrupt_enable(rt_base_t level) void rt_hw_interrupt_enable(rt_base_t level)
{ {
struct rt_thread * tid;
pthread_t pid;
thread_t *thread_from;
thread_t *thread_to;
if (ptr_int_mutex == NULL)
return;
interrupt_disable_flag = level; interrupt_disable_flag = level;
en_count++; pthread_mutex_unlock(ptr_int_mutex);
/* 如果已经中断仍然关闭 */
if (interrupt_disable_flag)
{
return;
}
/* 表示当前中断打开, 检查是否有挂起的中断 */
pthread_mutex_lock(ptr_int_mutex);
if (!cpu_pending_interrupts)
{
pthread_mutex_unlock(ptr_int_mutex);
return;
}
thread_from = (thread_t *) rt_interrupt_from_thread;
thread_to = (thread_t *) rt_interrupt_to_thread;
tid = rt_thread_self();
pid = pthread_self();
if (pid != mainthread_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 */
TRACE("conswitch: P in pid<%x> ,suspend <%s>, resume <%s>!\n",
(unsigned int)pid,
thread_from->rtthread->name,
thread_to->rtthread->name);
/* 确定一下,这两个值一定是相等的! */
RT_ASSERT(thread_from->pthread == pid);
/* 唤醒被挂起的线程 */
sem_post(& thread_to ->sem);
cpu_pending_interrupts --;
pthread_mutex_unlock(ptr_int_mutex);
/* 挂起当前的线程 */
sem_wait(& thread_from->sem);
}
else
{
/* 注意这段代码是在system tick 函数中执行的,
* 线SIGALRM信号处理函数中
*/
TRACE("conswitch: S in pid<%x> ,suspend <%s>, resume <%s>!\n",
(unsigned int)pid,
thread_from->rtthread->name,
thread_to->rtthread->name);
/* 挂起from线程 */
pthread_kill(thread_from->pthread, MSG_SUSPEND);
cpu_pending_interrupts --;
pthread_mutex_unlock(ptr_int_mutex);
/* 唤醒to线程 */
sem_post(& thread_to->sem);
}
/*TODO: It may need to unmask the signal */ /*TODO: It may need to unmask the signal */
} }
@ -240,66 +308,12 @@ void rt_hw_context_switch(rt_uint32_t from,
rt_interrupt_from_thread = *((rt_uint32_t *)from); rt_interrupt_from_thread = *((rt_uint32_t *)from);
rt_interrupt_to_thread = *((rt_uint32_t *)to); rt_interrupt_to_thread = *((rt_uint32_t *)to);
thread_from = (thread_t *) rt_interrupt_from_thread; /* 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
thread_to = (thread_t *) rt_interrupt_to_thread; *
*/
/* FIXME note: now, rt_current_thread is the thread_to! scheduler.c:272 */ pthread_mutex_lock(ptr_int_mutex);
tid = rt_thread_self(); cpu_pending_interrupts ++;
pid = pthread_self(); pthread_mutex_unlock(ptr_int_mutex);
/*
* FIXME: rt_schedule函数中是先关闭中断
* PendSVstm32为例cpu_port.c的win32版本可以模拟这种
* 线
* 1) rtt线程调用rt_thread_delay/rt_sem_take等主动挂起时
* 2) rt_thread_delay定时到期时线SIGALRM信号处理函数中实现线程切换
*
* if中语句为真退
*
if (interrupt_disable_flag != 0)
{
printf("dis_count=%d, en_count=%d\n", dis_count, en_count);
printf("interrupt_disable_flag = %d\n", interrupt_disable_flag);
printf("bug! interrupt is disabled! You may forget enable interrupt\n");
exit(EXIT_FAILURE);
}
*/
if (pid != mainthread_pid)
{
/* FIXME: 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 */
TRACE("conswitch: P in pid<%x> ,suspend <%s>, resume <%s>!\n",
(unsigned int)pid,
thread_from->rtthread->name,
thread_to->rtthread->name);
/* 确定一下,这两个值一定是相等的! */
RT_ASSERT(thread_from->pthread == pid);
/* 唤醒to线程 */
sem_post(& thread_to->sem);
/* 挂起from线程, 既然from线程就是当前线程所以应该直接
* */
sem_wait(& thread_from->sem);
}
else
{
/* FIXME: 注意这段代码是在system tick 函数中执行的,
* 线SIGALRM信号处理函数中
*/
TRACE("conswitch: S in pid<%x> ,suspend <%s>, resume <%s>!\n",
(unsigned int)pid,
thread_from->rtthread->name,
thread_to->rtthread->name);
/* 挂起from线程 */
pthread_kill(thread_from->pthread, MSG_SUSPEND);
/* 唤醒to线程 */
sem_post(& thread_to->sem);
}
} }
void rt_hw_context_switch_to(rt_uint32_t to) void rt_hw_context_switch_to(rt_uint32_t to)
@ -331,7 +345,6 @@ static int mainthread_scheduler(void)
thread_t *thread_to; thread_t *thread_to;
pthread_mutex_t mutex; pthread_mutex_t mutex;
pthread_mutexattr_t mutexattr; pthread_mutexattr_t mutexattr;
unsigned int contex_switch_mask;
/* save the main thread id */ /* save the main thread id */
mainthread_pid = pthread_self(); mainthread_pid = pthread_self();
@ -342,14 +355,11 @@ static int mainthread_scheduler(void)
/* install signal handler used to suspend itself */ /* install signal handler used to suspend itself */
signal_install(MSG_SUSPEND, thread_switch_handler); signal_install(MSG_SUSPEND, thread_switch_handler);
#if 0
/* create a mutex and condition val, used to indicate interrupts occrue */ /* create a mutex and condition val, used to indicate interrupts occrue */
ptr_int_mutex = &mutex; ptr_int_mutex = &mutex;
pthread_mutexattr_init(&mutexattr); pthread_mutexattr_init(&mutexattr);
pthread_mutexattr_settype(&mutexattr, PTHREAD_MUTEX_RECURSIVE); pthread_mutexattr_settype(&mutexattr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(ptr_int_mutex, &mutexattr); pthread_mutex_init(ptr_int_mutex, &mutexattr);
pthread_cond_init(&cond_int_hit, NULL);
#endif
/* start timer */ /* start timer */
start_sys_timer(); start_sys_timer();
@ -405,17 +415,20 @@ static void start_sys_timer(void)
static void mthread_signal_tick(int sig) static void mthread_signal_tick(int sig)
{ {
int res;
pthread_t pid = pthread_self(); pthread_t pid = pthread_self();
if (sig == SIGALRM) if (sig == SIGALRM)
{ {
TRACE("pid <%x> signal: SIGALRM enter!\n", (unsigned int)pid); TRACE("pid <%x> signal: SIGALRM enter!\n", (unsigned int)pid);
/* FIXME: 下面这条语句不能打开打开就会导致失败tick_interrupt_isry if (pthread_mutex_trylock(ptr_int_mutex) != 0)
* {
*/ TRACE("try lock failed.\n");
/* if (! interrupt_disable_flag) */ return;
}
tick_interrupt_isr(); tick_interrupt_isr();
pthread_mutex_unlock(ptr_int_mutex);
TRACE("pid <%x> signal: SIGALRM leave!\n", (unsigned int)pid); TRACE("pid <%x> signal: SIGALRM leave!\n", (unsigned int)pid);
} }