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cmsis_rtthread.c
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cmsis_rtthread.c
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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-04-12 misonyo the first version
* 2019-04-04 misonyo fix some bugs
*/
#include <cmsis_os2.h>
#include "cmsis_rtthread.h"
#include <board.h>
#include <os_tick.h>
#include <rthw.h>
#define KERNEL_Id "RT-Thread" ///< Kernel identification string
#define DEFAULT_STACK_SIZE 512
#define DEFAULT_TICK 5
#define WAITING_THREAD_FLAGS 0x08
#define MALLOC_CB 0x10
#define MALLOC_STACK 0x04
#define MALLOC_MEM 0x02
static osKernelState_t kernel_state = osKernelInactive;
static void thread_cleanup(rt_thread_t thread)
{
thread_cb_t *thread_cb;
thread_cb = (thread_cb_t *)(thread->user_data);
/* clear cleanup function */
thread->cleanup = RT_NULL;
if (thread_cb->flags & osThreadJoinable)
{
rt_sem_release(thread_cb->joinable_sem);
}
else
{
if (thread_cb->flags & MALLOC_STACK)
rt_free(thread_cb->thread.stack_addr);
if (thread_cb->flags & MALLOC_CB)
rt_free(thread_cb);
}
}
// ==== Kernel Management Functions ====
// ==== Helper functions ====
/// Block Kernel (disable: thread switching, time tick, post ISR processing).
#ifdef SysTick
static volatile uint8_t blocked; ///< Blocked
static uint8_t pendSV; ///< Pending SV
/// Get Pending SV (Service Call) Flag
/// \return Pending SV Flag
__STATIC_INLINE uint8_t GetPendSV (void)
{
return ((uint8_t)((SCB->ICSR & (SCB_ICSR_PENDSVSET_Msk)) >> 24));
}
/// Clear Pending SV (Service Call) Flag
__STATIC_INLINE void ClrPendSV (void)
{
SCB->ICSR = SCB_ICSR_PENDSVCLR_Msk;
}
/// Set Pending SV (Service Call) Flag
__STATIC_INLINE void SetPendSV (void)
{
SCB->ICSR = SCB_ICSR_PENDSVSET_Msk;
}
/// Block Kernel (disable: thread switching, time tick, post ISR processing).
static void KernelBlock (void)
{
OS_Tick_Disable();
blocked = 1U;
__DSB();
if (GetPendSV() != 0U)
{
ClrPendSV();
pendSV = 1U;
}
}
/// Unblock Kernel
static void KernelUnblock (void)
{
blocked = 0U;
__DSB();
if (pendSV != 0U)
{
pendSV = 0U;
SetPendSV();
}
OS_Tick_Enable();
}
#endif
/// Initialize the RTOS Kernel.
/// \return status code that indicates the execution status of the function.
osStatus_t osKernelInitialize(void)
{
kernel_state = osKernelReady;
return osOK;
}
/// Get RTOS Kernel Information.
/// \param[out] version pointer to buffer for retrieving version information.
/// \param[out] id_buf pointer to buffer for retrieving kernel identification string.
/// \param[in] id_size size of buffer for kernel identification string.
/// \return status code that indicates the execution status of the function.
osStatus_t osKernelGetInfo(osVersion_t *version, char *id_buf, uint32_t id_size)
{
if ((RT_NULL == version) || (RT_NULL == id_buf) || id_size < sizeof(KERNEL_Id))
return osErrorParameter;
version->api = KERNEL_VERSION;
version->kernel = KERNEL_VERSION;
id_size = sizeof(KERNEL_Id);
rt_strncpy(id_buf, KERNEL_Id, id_size);
return osOK;
}
/// Get the current RTOS Kernel state.
/// \return current RTOS Kernel state.
osKernelState_t osKernelGetState(void)
{
return kernel_state;
}
/// Start the RTOS Kernel scheduler.
/// \return status code that indicates the execution status of the function.
osStatus_t osKernelStart(void)
{
osStatus_t state;
if (osKernelReady == kernel_state)
{
kernel_state = osKernelRunning;
state = osOK;
}
else
{
state = osError;
}
return state;
}
/// Lock the RTOS Kernel scheduler.
/// \return previous lock state (1 - locked, 0 - not locked, error code if negative).
int32_t osKernelLock(void)
{
rt_uint16_t level;
level = rt_critical_level();
rt_enter_critical();
kernel_state = osKernelLocked;
if (level)
{
return 1;
}
else
{
return 0;
}
}
/// Unlock the RTOS Kernel scheduler.
/// \return previous lock state (1 - locked, 0 - not locked, error code if negative).
int32_t osKernelUnlock(void)
{
rt_uint16_t level;
level = rt_critical_level();
if (0U == level)
{
return 0;
}
else
{
rt_exit_critical();
if (1u == level)
kernel_state = osKernelRunning;
return 1;
}
}
/// Restore the RTOS Kernel scheduler lock state.
/// \param[in] lock lock state obtained by \ref osKernelLock or \ref osKernelUnlock.
/// \return new lock state (1 - locked, 0 - not locked, error code if negative).
int32_t osKernelRestoreLock(int32_t lock)
{
if (1u == lock)
{
osKernelLock();
return 1;
}
else
{
osKernelUnlock();
return 0;
}
}
/// Get the RTOS kernel tick count.
/// \return RTOS kernel current tick count.
uint32_t osKernelGetTickCount(void)
{
return (uint32_t)rt_tick_get();
}
/// Get the RTOS kernel tick frequency.
/// \return frequency of the kernel tick.
uint32_t osKernelGetTickFreq(void)
{
return RT_TICK_PER_SECOND;
}
/// The function returns the current RTOS kernel system timer as a 32-bit value.
/// \return RTOS kernel current system timer count as 32-bit value
#ifdef SysTick
uint32_t osKernelGetSysTimerCount(void)
{
uint32_t irqmask ;
rt_tick_t ticks;
uint32_t val;
irqmask = rt_hw_interrupt_disable();
ticks = rt_tick_get();
val = OS_Tick_GetCount();
if (OS_Tick_GetOverflow() != 0U)
{
val = OS_Tick_GetCount();
ticks++;
}
val += ticks * OS_Tick_GetInterval();
rt_hw_interrupt_enable(irqmask);
return (val);
}
#endif /*SysTick*/
/// Get the RTOS kernel system timer frequency.
/// \return frequency of the system timer.
uint32_t osKernelGetSysTimerFreq(void)
{
return RT_TICK_PER_SECOND;
}
/// Suspend the RTOS Kernel scheduler.
/// \return time in ticks, for how long the system can sleep or power-down.
#ifdef SysTick
uint32_t osKernelSuspend (void)
{
rt_thread_t thread;
rt_timer_t timer;
struct rt_object_information *info_thread;
struct rt_object_information *info_timer;
struct rt_list_node *node;
rt_uint8_t timer_index = 0;
rt_tick_t min_tick = 0;
rt_tick_t cur_tick = 0;
rt_tick_t temp_tick = 0;
if (kernel_state != osKernelRunning)
{
return 0U;
}
info_thread = rt_object_get_information(RT_Object_Class_Thread);
info_timer = rt_object_get_information(RT_Object_Class_Timer);
KernelBlock();
min_tick = osWaitForever;
cur_tick = rt_tick_get();
/*check thread delay list*/
if (info_thread != NULL)
{
for (node = info_thread->object_list.next; node != &(info_thread->object_list); node = node->next)
{
thread = thread_rt_list_entry(node, rt_thread);
if (thread->thread_timer.parent.flag & RT_TIMER_FLAG_ACTIVATED)
{
temp_tick = thread->thread_timer.timeout_tick - cur_tick;
if (temp_tick < min_tick)
{
min_tick = temp_tick;
}
}
}
}
/*check active timer list*/
if (info_timer != NULL)
{
for (node = info_timer->object_list.next; node != &(info_timer->object_list); node = node->next)
{
timer = rt_list_entry(node, struct rt_timer, row[timer_index++]);
if (timer->parent.flag & RT_TIMER_FLAG_ACTIVATED)
{
temp_tick = timer->timeout_tick - cur_tick;
if (temp_tick < min_tick)
{
min_tick = temp_tick;
}
}
}
}
if (osWaitForever == min_tick)
min_tick = 0U;
kernel_state = osKernelSuspended;
return (min_tick);
}
#endif /* SysTick */
/// Resume the RTOS Kernel scheduler.
/// \param[in] sleep_ticks time in ticks for how long the system was in sleep or power-down mode.
#ifdef SysTick
void osKernelResume (uint32_t sleep_ticks)
{
rt_tick_t delay_tick = 0;
if (kernel_state != osKernelSuspended)
{
return;
}
delay_tick = (rt_tick_t)sleep_ticks;
rt_enter_critical();
while(delay_tick > 0)
{
rt_tick_increase(); /*Process Thread Delay list and Process Active Timer list*/
delay_tick --;
}
rt_exit_critical();
kernel_state = osKernelRunning;
KernelUnblock();
return;
}
#endif
// ==== Thread Management Functions ====
/// Create a thread and add it to Active Threads.
/// \param[in] func thread function.
/// \param[in] argument pointer that is passed to the thread function as start argument.
/// \param[in] attr thread attributes; NULL: default values.
/// \return thread ID for reference by other functions or NULL in case of error.
osThreadId_t osThreadNew(osThreadFunc_t func, void *argument, const osThreadAttr_t *attr)
{
void *stack;
rt_uint8_t rtt_prio;
rt_uint32_t stack_size;
thread_cb_t *thread_cb;
char name[RT_NAME_MAX];
static rt_uint16_t thread_number = 1U;
/* Check parameters */
if (RT_NULL == func)
{
return RT_NULL;
}
if ((RT_NULL == attr) || (RT_NULL == attr->cb_mem))
{
thread_cb = rt_malloc(sizeof(thread_cb_t));
if (RT_NULL == thread_cb)
return RT_NULL;
rt_memset(thread_cb, 0, sizeof(thread_cb_t));
thread_cb->flags |= MALLOC_CB;
}
else
{
if (attr->cb_size >= sizeof(thread_cb_t))
{
thread_cb = attr->cb_mem;
thread_cb->flags = 0;
}
else
return RT_NULL;
}
if ((RT_NULL == attr) || (RT_NULL == attr->name))
rt_snprintf(name, sizeof(name), "th%02d", thread_number ++);
else
rt_snprintf(name, sizeof(name), "%s", attr->name);
if ((RT_NULL == attr) || (osPriorityNone == attr->priority))
{
thread_cb->prio = osPriorityNormal;
}
else
{
if ((attr->priority < osPriorityIdle) || (attr->priority > osPriorityISR))
return RT_NULL;
thread_cb->prio = attr->priority;
}
if ((RT_NULL == attr) || (0U == attr->stack_size))
stack_size = DEFAULT_STACK_SIZE;
else
stack_size = attr->stack_size;
if ((RT_NULL == attr) || (RT_NULL == attr->stack_mem))
{
stack = rt_malloc(stack_size);
if (RT_NULL == stack)
{
if (thread_cb->flags & MALLOC_CB)
rt_free(thread_cb);
return RT_NULL;
}
thread_cb->flags |= MALLOC_STACK;
}
else
{
stack = (void *)(attr->stack_mem);
}
if ((RT_NULL != attr) && (0 != attr->attr_bits))
thread_cb->flags |= attr->attr_bits;
rtt_prio = (osPriorityISR - thread_cb->prio) * RT_THREAD_PRIORITY_MAX / osPriorityISR;
rt_thread_init(&(thread_cb->thread), name, func, argument, stack, stack_size, rtt_prio, DEFAULT_TICK);
if (thread_cb->flags & osThreadJoinable)
{
thread_cb->joinable_sem = rt_sem_create(name, 0, RT_IPC_FLAG_FIFO);
if (RT_NULL == thread_cb->joinable_sem)
{
if (thread_cb->flags & MALLOC_CB)
rt_free(thread_cb);
if (thread_cb->flags & MALLOC_STACK)
rt_free(stack);
return RT_NULL;
}
}
else
thread_cb->joinable_sem = RT_NULL;
thread_cb->thread.cleanup = thread_cleanup;
thread_cb->thread.user_data = (rt_uint32_t)thread_cb;
rt_thread_startup(&(thread_cb->thread));
return thread_cb;
}
/// Get name of a thread.
/// \param[in] thread_id thread ID obtained by \ref osThreadNew or \ref osThreadGetId.
/// \return name as NULL terminated string.
const char *osThreadGetName(osThreadId_t thread_id)
{
thread_cb_t *thread_cb = (thread_cb_t *)thread_id;
/* Check parameters */
if ((RT_NULL == thread_cb) || (rt_object_get_type((rt_object_t)(&thread_cb->thread)) != RT_Object_Class_Thread))
{
return RT_NULL;
}
return THREAD_NAME(thread_cb);
}
/// Return the thread ID of the current running thread.
/// \return thread ID for reference by other functions or NULL in case of error.
osThreadId_t osThreadGetId(void)
{
rt_thread_t thread;
thread = rt_thread_self();
return (osThreadId_t)(thread->user_data);
}
/// Get current thread state of a thread.
/// \param[in] thread_id thread ID obtained by \ref osThreadNew or \ref osThreadGetId.
/// \return current thread state of the specified thread.
osThreadState_t osThreadGetState(osThreadId_t thread_id)
{
osThreadState_t state;
thread_cb_t *thread_cb = (thread_cb_t *)thread_id;
/* Check parameters */
if ((RT_NULL == thread_cb) || (rt_object_get_type((rt_object_t)(&thread_cb->thread)) != RT_Object_Class_Thread))
{
return osThreadError;
}
switch (CMSIS_RT_SCHED_CTX(thread_cb->thread).stat)
{
case RT_THREAD_INIT:
state = osThreadInactive;
break;
case RT_THREAD_READY:
state = osThreadReady;
break;
case RT_THREAD_SUSPEND:
state = osThreadBlocked;
break;
case RT_THREAD_RUNNING:
state = osThreadRunning;
break;
case RT_THREAD_CLOSE:
state = osThreadTerminated;
break;
default:
state = osThreadError;
break;
}
return state;
}
/// Get stack size of a thread.
/// \param[in] thread_id thread ID obtained by \ref osThreadNew or \ref osThreadGetId.
/// \return stack size in bytes.
uint32_t osThreadGetStackSize(osThreadId_t thread_id)
{
thread_cb_t *thread_cb = (thread_cb_t *)thread_id;
/* Check parameters */
if ((RT_NULL == thread_cb) || (rt_object_get_type((rt_object_t)(&thread_cb->thread)) != RT_Object_Class_Thread))
{
return 0U;
}
return ((uint32_t)thread_cb->thread.stack_size);
}
/// Get available stack space of a thread based on stack watermark recording during execution.
/// \param[in] thread_id thread ID obtained by \ref osThreadNew or \ref osThreadGetId.
/// \return remaining stack space in bytes.
uint32_t osThreadGetStackSpace(osThreadId_t thread_id)
{
rt_uint8_t *ptr;
thread_cb_t *thread_cb = (thread_cb_t *)thread_id;
/* Check parameters */
if ((RT_NULL == thread_cb) || (rt_object_get_type((rt_object_t)(&thread_cb->thread)) != RT_Object_Class_Thread))
{
return 0U;
}
ptr = (rt_uint8_t *)thread_cb->thread.stack_addr;
while (*ptr == '#')ptr ++;
return (ptr - (rt_uint8_t *)thread_cb->thread.stack_addr);
}
/// Change priority of a thread.
/// \param[in] thread_id thread ID obtained by \ref osThreadNew or \ref osThreadGetId.
/// \param[in] priority new priority value for the thread function.
/// \return status code that indicates the execution status of the function.
osStatus_t osThreadSetPriority(osThreadId_t thread_id, osPriority_t priority)
{
rt_uint8_t rt_priority;
thread_cb_t *thread_cb = (thread_cb_t *)thread_id;
// Check parameters
if ((RT_NULL == thread_cb) || (priority < osPriorityIdle) || (priority > osPriorityISR))
{
return osErrorParameter;
}
thread_cb->prio = priority;
rt_priority = (osPriorityISR - thread_cb->prio) * RT_THREAD_PRIORITY_MAX / osPriorityISR;
rt_thread_control(&(thread_cb->thread), RT_THREAD_CTRL_CHANGE_PRIORITY, &rt_priority);
return osOK;
}
/// Get current priority of a thread.
/// \param[in] thread_id thread ID obtained by \ref osThreadNew or \ref osThreadGetId.
/// \return current priority value of the specified thread.
osPriority_t osThreadGetPriority(osThreadId_t thread_id)
{
thread_cb_t *thread_cb = (thread_cb_t *)thread_id;
/* Check parameters */
if ((RT_NULL == thread_cb) || (rt_object_get_type((rt_object_t)(&thread_cb->thread)) != RT_Object_Class_Thread))
{
return osPriorityError;
}
return (osPriority_t)thread_cb->prio;
}
/// Pass control to next thread that is in state \b READY.
/// \return status code that indicates the execution status of the function.
osStatus_t osThreadYield(void)
{
rt_thread_yield();
return osOK;
}
/// Suspend execution of a thread.
/// \param[in] thread_id thread ID obtained by \ref osThreadNew or \ref osThreadGetId.
/// \return status code that indicates the execution status of the function.
osStatus_t osThreadSuspend(osThreadId_t thread_id)
{
rt_err_t result;
thread_cb_t *thread_cb = (thread_cb_t *)thread_id;
/* Check parameters */
if (RT_NULL == thread_cb)
{
return osErrorParameter;
}
result = rt_thread_suspend(&(thread_cb->thread));
if (RT_EOK == result)
return osOK;
else
return osError;
}
/// Resume execution of a thread.
/// \param[in] thread_id thread ID obtained by \ref osThreadNew or \ref osThreadGetId.
/// \return status code that indicates the execution status of the function.
osStatus_t osThreadResume(osThreadId_t thread_id)
{
rt_err_t result;
thread_cb_t *thread_cb = (thread_cb_t *)thread_id;
/* Check parameters */
if (RT_NULL == thread_cb)
{
return osErrorParameter;
}
result = rt_thread_resume(&(thread_cb->thread));
if (RT_EOK == result)
return osOK;
else
return osError;
}
/// Detach a thread (thread storage can be reclaimed when thread terminates).
/// \param[in] thread_id thread ID obtained by \ref osThreadNew or \ref osThreadGetId.
/// \return status code that indicates the execution status of the function.
osStatus_t osThreadDetach(osThreadId_t thread_id)
{
thread_cb_t *thread_cb = (thread_cb_t *)thread_id;
/* Check parameters */
if ((RT_NULL == thread_cb) || (rt_object_get_type((rt_object_t)(&thread_cb->thread)) != RT_Object_Class_Thread))
{
return osErrorParameter;
}
/* Check object attributes */
/*
if ((thread_cb->flags & osThreadJoinable) == 0)
{
return osErrorResource;
}
*/
if ((CMSIS_RT_SCHED_CTX(thread_cb->thread).stat & RT_THREAD_STAT_MASK) == RT_THREAD_CLOSE)
{
rt_thread_detach(&(thread_cb->thread));
if (thread_cb->flags & osThreadJoinable)
rt_sem_delete(thread_cb->joinable_sem);
if (thread_cb->flags & MALLOC_STACK)
rt_free(thread_cb->thread.stack_addr);
if (thread_cb->flags & MALLOC_CB)
rt_free(thread_cb);
}
else
{
rt_enter_critical();
/* change to detach state */
thread_cb->flags &= ~osThreadJoinable;
/* delete joinable semaphore */
if (RT_NULL != thread_cb->joinable_sem)
{
rt_sem_delete(thread_cb->joinable_sem);
thread_cb->joinable_sem = RT_NULL;
}
/* detach thread object */
rt_thread_detach(&thread_cb->thread);
rt_exit_critical();
}
return osOK;
}
/// Wait for specified thread to terminate.
/// \param[in] thread_id thread ID obtained by \ref osThreadNew or \ref osThreadGetId.
/// \return status code that indicates the execution status of the function.
osStatus_t osThreadJoin(osThreadId_t thread_id)
{
rt_err_t result;
thread_cb_t *thread_cb = (thread_cb_t *)thread_id;
/* Check parameters */
if (RT_NULL == thread_cb)
{
return osErrorParameter;
}
if (((&thread_cb->thread) == rt_thread_self()) ||
(0 == (thread_cb->flags & osThreadJoinable)))
{
/* join self or join a detached thread*/
return osErrorResource;
}
result = rt_sem_take(thread_cb->joinable_sem, RT_WAITING_FOREVER);
if (RT_EOK == result)
{
/* release resource */
if (thread_cb->flags & osThreadJoinable)
rt_sem_delete(thread_cb->joinable_sem);
if (thread_cb->flags & MALLOC_STACK)
rt_free(thread_cb->thread.stack_addr);
if (thread_cb->flags & MALLOC_CB)
rt_free(thread_cb);
}
else
return osError;
return osOK;
}
/// Terminate execution of current running thread.
__NO_RETURN void osThreadExit(void)
{
rt_thread_t self = rt_thread_self();
rt_thread_control(self, RT_THREAD_CTRL_CLOSE, RT_NULL);
RT_ASSERT(0);
while(1);
}
/// Terminate execution of a thread.
/// \param[in] thread_id thread ID obtained by \ref osThreadNew or \ref osThreadGetId.
/// \return status code that indicates the execution status of the function.
osStatus_t osThreadTerminate(osThreadId_t thread_id)
{
thread_cb_t *thread_cb;
thread_cb = (thread_cb_t *)(rt_thread_self()->user_data);
/* Check parameters */
if (RT_NULL == thread_cb)
{
return osErrorParameter;
}
rt_thread_detach(&(thread_cb->thread));
rt_schedule();
return osOK;
}
/// Get number of active threads.
/// \return number of active threads.
uint32_t osThreadGetCount(void)
{
rt_uint32_t thread_count = 0U;
struct rt_object_information *info;
info = rt_object_get_information(RT_Object_Class_Thread);
rt_enter_critical();
thread_count = rt_list_len(&(info->object_list));
rt_exit_critical();
return thread_count;
}
/// Enumerate active threads.
/// \param[out] thread_array pointer to array for retrieving thread IDs.
/// \param[in] array_items maximum number of items in array for retrieving thread IDs.
/// \return number of enumerated threads.
uint32_t osThreadEnumerate(osThreadId_t *thread_array, uint32_t array_items)
{
rt_uint32_t thread_count = 0U;
rt_thread_t thread;
struct rt_object_information *info;
struct rt_list_node *node;
/* Check parameters */
if ((RT_NULL == thread_array) || (0U == array_items))
{
return 0U;
}
info = rt_object_get_information(RT_Object_Class_Thread);
rt_enter_critical();
for (node = info->object_list.next; node != &(info->object_list); node = node->next)
{
thread = thread_rt_list_entry(node, rt_thread);
thread_array[thread_count] = (osThreadId_t)thread;
thread_count++;
if (thread_count >= array_items)
break;
}
rt_exit_critical();
return thread_count;
}
// ==== Thread Flags Functions ====
/// Set the specified Thread Flags of a thread.
/// \param[in] thread_id thread ID obtained by \ref osThreadNew or \ref osThreadGetId.
/// \param[in] flags specifies the flags of the thread that shall be set.
/// \return thread flags after setting or error code if highest bit set.
uint32_t osThreadFlagsSet(osThreadId_t thread_id, uint32_t flags)
{
register rt_base_t status;
register rt_ubase_t level;
rt_bool_t need_schedule = RT_FALSE;
thread_cb_t *thread_cb;
rt_uint32_t return_value;
thread_cb = (thread_cb_t *)(thread_id);
/* Check parameters */
if ((RT_NULL == thread_cb) || (rt_object_get_type((rt_object_t)(&thread_cb->thread)) != RT_Object_Class_Thread))
{
return osFlagsErrorParameter;
}
level = rt_hw_interrupt_disable();
thread_cb->flag_set |= flags;
return_value = thread_cb->flag_set;
/* Check if Thread is waiting for Thread Flags */
if (thread_cb->thread.event_info & WAITING_THREAD_FLAGS)
{
status = -RT_ERROR;
if (thread_cb->thread.event_info & osFlagsWaitAll)
{
if ((thread_cb->thread.event_set & thread_cb->flag_set) == thread_cb->thread.event_set)
{
/* received an AND event */
status = RT_EOK;
}
}
else
{
if (thread_cb->thread.event_set & thread_cb->flag_set)
{
/* save recieved event set */
thread_cb->thread.event_set &= thread_cb->flag_set;
/* received an OR event */
status = RT_EOK;
}
}
/* condition is satisfied, resume thread */
if (RT_EOK == status)
{
thread_cb->thread.event_info &= ~WAITING_THREAD_FLAGS;
/* clear event */
if (!(thread_cb->thread.event_info & osFlagsNoClear))
thread_cb->flag_set &= ~thread_cb->thread.event_set;
/* resume thread, and thread list breaks out */
rt_thread_resume(rt_thread_self());
need_schedule = RT_TRUE;
}
}
rt_hw_interrupt_enable(level);
if (need_schedule == RT_TRUE)
rt_schedule();
return return_value;
}
/// Clear the specified Thread Flags of current running thread.
/// \param[in] flags specifies the flags of the thread that shall be cleared.
/// \return thread flags before clearing or error code if highest bit set.
uint32_t osThreadFlagsClear(uint32_t flags)
{
rt_thread_t thread = rt_thread_self();
thread_cb_t *thread_cb;
rt_uint32_t flag;
/* Check parameters */
if (RT_NULL == thread)
{
return osFlagsErrorParameter;
}
thread_cb = (thread_cb_t *)(thread->user_data);
rt_enter_critical();
flag = thread_cb->flag_set;
thread_cb->flag_set &= ~flags;
rt_exit_critical();
return flag;
}
/// Get the current Thread Flags of current running thread.
/// \return current thread flags.
uint32_t osThreadFlagsGet(void)
{
rt_thread_t thread = rt_thread_self();
thread_cb_t *thread_cb;
/* Check parameters */
if (RT_NULL == thread)
{
return osFlagsErrorParameter;
}
thread_cb = (thread_cb_t *)(thread->user_data);
return thread_cb->flag_set;
}
/// Wait for one or more Thread Flags of the current running thread to become signaled.
/// \param[in] flags specifies the flags to wait for.
/// \param[in] options specifies flags options (osFlagsXxxx).
/// \param[in] timeout \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out.
/// \return thread flags before clearing or error code if highest bit set.
uint32_t osThreadFlagsWait(uint32_t flags, uint32_t options, uint32_t timeout)
{
rt_uint32_t return_value;
register rt_ubase_t level;