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rt-thread
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89cf5886
编写于
1月 03, 2021
作者:
mysterywolf
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电子邮件补丁
差异文件
add rt_mb_urgent() and rt_mb_urgent_wait()
上级
b315c36a
变更
1
隐藏空白更改
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1 changed file
with
164 addition
and
0 deletion
+164
-0
src/ipc.c
src/ipc.c
+164
-0
未找到文件。
src/ipc.c
浏览文件 @
89cf5886
...
...
@@ -37,6 +37,7 @@
* 2020-07-29 Meco Man fix thread->event_set/event_info when received an
* event without pending
* 2020-10-11 Meco Man add value overflow-check code
* 2021-01-03 Meco Man add rt_mb_urgent() and rt_mb_urgent_wait()
*/
#include <rtthread.h>
...
...
@@ -1654,6 +1655,169 @@ rt_err_t rt_mb_send(rt_mailbox_t mb, rt_ubase_t value)
}
RTM_EXPORT
(
rt_mb_send
);
/**
* This function will send an urgent mail to mailbox object. If the mailbox is full,
* current thread will be suspended until timeout.
*
* @param mb the mailbox object
* @param value the mail
* @param timeout the waiting time
*
* @return the error code
*/
rt_err_t
rt_mb_urgent_wait
(
rt_mailbox_t
mb
,
rt_ubase_t
value
,
rt_int32_t
timeout
)
{
struct
rt_thread
*
thread
;
register
rt_ubase_t
temp
;
rt_uint32_t
tick_delta
;
/* parameter check */
RT_ASSERT
(
mb
!=
RT_NULL
);
RT_ASSERT
(
rt_object_get_type
(
&
mb
->
parent
.
parent
)
==
RT_Object_Class_MailBox
);
/* initialize delta tick */
tick_delta
=
0
;
/* get current thread */
thread
=
rt_thread_self
();
RT_OBJECT_HOOK_CALL
(
rt_object_put_hook
,
(
&
(
mb
->
parent
.
parent
)));
/* disable interrupt */
temp
=
rt_hw_interrupt_disable
();
/* for non-blocking call */
if
(
mb
->
entry
==
mb
->
size
&&
timeout
==
0
)
{
rt_hw_interrupt_enable
(
temp
);
return
-
RT_EFULL
;
}
/* mailbox is full */
while
(
mb
->
entry
==
mb
->
size
)
{
/* reset error number in thread */
thread
->
error
=
RT_EOK
;
/* no waiting, return timeout */
if
(
timeout
==
0
)
{
/* enable interrupt */
rt_hw_interrupt_enable
(
temp
);
return
-
RT_EFULL
;
}
RT_DEBUG_IN_THREAD_CONTEXT
;
/* suspend current thread */
rt_ipc_list_suspend
(
&
(
mb
->
suspend_sender_thread
),
thread
,
mb
->
parent
.
parent
.
flag
);
/* has waiting time, start thread timer */
if
(
timeout
>
0
)
{
/* get the start tick of timer */
tick_delta
=
rt_tick_get
();
RT_DEBUG_LOG
(
RT_DEBUG_IPC
,
(
"mb_send_wait: start timer of thread:%s
\n
"
,
thread
->
name
));
/* reset the timeout of thread timer and start it */
rt_timer_control
(
&
(
thread
->
thread_timer
),
RT_TIMER_CTRL_SET_TIME
,
&
timeout
);
rt_timer_start
(
&
(
thread
->
thread_timer
));
}
/* enable interrupt */
rt_hw_interrupt_enable
(
temp
);
/* re-schedule */
rt_schedule
();
/* resume from suspend state */
if
(
thread
->
error
!=
RT_EOK
)
{
/* return error */
return
thread
->
error
;
}
/* disable interrupt */
temp
=
rt_hw_interrupt_disable
();
/* if it's not waiting forever and then re-calculate timeout tick */
if
(
timeout
>
0
)
{
tick_delta
=
rt_tick_get
()
-
tick_delta
;
timeout
-=
tick_delta
;
if
(
timeout
<
0
)
timeout
=
0
;
}
}
/* rewind to the previous position */
if
(
mb
->
out_offset
>
0
)
{
mb
->
out_offset
--
;
}
else
{
mb
->
out_offset
=
mb
->
size
-
1
;
}
/* set ptr */
mb
->
msg_pool
[
mb
->
out_offset
]
=
value
;
if
(
mb
->
entry
<
RT_MB_ENTRY_MAX
)
{
/* increase message entry */
mb
->
entry
++
;
}
else
{
rt_hw_interrupt_enable
(
temp
);
/* enable interrupt */
return
-
RT_EFULL
;
/* value overflowed */
}
/* resume suspended thread */
if
(
!
rt_list_isempty
(
&
mb
->
parent
.
suspend_thread
))
{
rt_ipc_list_resume
(
&
(
mb
->
parent
.
suspend_thread
));
/* enable interrupt */
rt_hw_interrupt_enable
(
temp
);
rt_schedule
();
return
RT_EOK
;
}
/* enable interrupt */
rt_hw_interrupt_enable
(
temp
);
return
RT_EOK
;
}
RTM_EXPORT
(
rt_mb_urgent_wait
);
/**
* This function will send an urgent mail to mailbox object, if there are threads
* suspended on mailbox object, it will be waked up. This function will return
* immediately, if you want blocking send, use rt_mb_urgent_wait instead.
*
* @param mb the mailbox object
* @param value the mail
*
* @return the error code
*/
rt_err_t
rt_mb_urgent
(
rt_mailbox_t
mb
,
rt_ubase_t
value
)
{
return
rt_mb_urgent_wait
(
mb
,
value
,
0
);
}
RTM_EXPORT
(
rt_mb_urgent
);
/**
* This function will receive a mail from mailbox object, if there is no mail
* in mailbox object, the thread shall wait for a specified time.
...
...
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