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/* ----------------------------------------------------------------------
* $Date: 5. February 2013
* $Revision: V1.02
*
* Project: CMSIS-RTOS API
* Title: cmsis_os.h RTX header file
*
* Version 0.02
* Initial Proposal Phase
* Version 0.03
* osKernelStart added, optional feature: main started as thread
* osSemaphores have standard behavior
* osTimerCreate does not start the timer, added osTimerStart
* osThreadPass is renamed to osThreadYield
* Version 1.01
* Support for C++ interface
* - const attribute removed from the osXxxxDef_t typedef's
* - const attribute added to the osXxxxDef macros
* Added: osTimerDelete, osMutexDelete, osSemaphoreDelete
* Added: osKernelInitialize
* Version 1.02
* Control functions for short timeouts in microsecond resolution:
* Added: osKernelSysTick, osKernelSysTickFrequency, osKernelSysTickMicroSec
* Removed: osSignalGet
*----------------------------------------------------------------------------
*
* Copyright (c) 2013 ARM LIMITED
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*---------------------------------------------------------------------------*/
#ifndef _CMSIS_OS_H
#define _CMSIS_OS_H
#define osCMSIS 0x10002U ///< CMSIS-RTOS API version (main [31:16] .sub [15:0])
#define osCMSIS_RTX ((4<<16)|82) ///< RTOS identification and version (main [31:16] .sub [15:0])
#define osKernelSystemId "RTX V4.82" ///< RTOS identification string
#define osFeature_MainThread 1 ///< main can be thread
#define osFeature_Pool 1 ///< Memory Pools available
#define osFeature_MailQ 1 ///< Mail Queues available
#define osFeature_MessageQ 1 ///< Message Queues available
#define osFeature_Signals 16 ///< 16 Signal Flags available per thread
#define osFeature_Semaphore 65535 ///< Maximum count for \ref osSemaphoreCreate function
#define osFeature_Wait 0 ///< osWait not available
#define osFeature_SysTick 1 ///< osKernelSysTick functions available
#if defined(__CC_ARM)
#define os_InRegs __value_in_regs // Compiler specific: force struct in registers
#else
#define os_InRegs
#endif
#if defined(__CC_ARM)
#define __NO_RETURN __declspec(noreturn)
#elif defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050)
#define __NO_RETURN __attribute__((noreturn))
#elif defined(__GNUC__)
#define __NO_RETURN __attribute__((noreturn))
#elif defined(__ICCARM__)
#define __NO_RETURN __noreturn
#else
#define __NO_RETURN
#endif
#include <stdint.h>
#include <stddef.h>
#ifdef __cplusplus
extern "C"
{
#endif
// ==== Enumeration, structures, defines ====
/// Priority used for thread control.
typedef enum {
osPriorityIdle = -3, ///< priority: idle (lowest)
osPriorityLow = -2, ///< priority: low
osPriorityBelowNormal = -1, ///< priority: below normal
osPriorityNormal = 0, ///< priority: normal (default)
osPriorityAboveNormal = +1, ///< priority: above normal
osPriorityHigh = +2, ///< priority: high
osPriorityRealtime = +3, ///< priority: realtime (highest)
osPriorityError = 0x84, ///< system cannot determine priority or thread has illegal priority
os_priority_reserved = 0x7FFFFFFF ///< prevent from enum down-size compiler optimization.
} osPriority;
/// Timeout value.
#define osWaitForever 0xFFFFFFFFU ///< wait forever timeout value
/// Status code values returned by CMSIS-RTOS functions.
typedef enum {
osOK = 0, ///< function completed; no error or event occurred.
osEventSignal = 0x08, ///< function completed; signal event occurred.
osEventMessage = 0x10, ///< function completed; message event occurred.
osEventMail = 0x20, ///< function completed; mail event occurred.
osEventTimeout = 0x40, ///< function completed; timeout occurred.
osErrorParameter = 0x80, ///< parameter error: a mandatory parameter was missing or specified an incorrect object.
osErrorResource = 0x81, ///< resource not available: a specified resource was not available.
osErrorTimeoutResource = 0xC1, ///< resource not available within given time: a specified resource was not available within the timeout period.
osErrorISR = 0x82, ///< not allowed in ISR context: the function cannot be called from interrupt service routines.
osErrorISRRecursive = 0x83, ///< function called multiple times from ISR with same object.
osErrorPriority = 0x84, ///< system cannot determine priority or thread has illegal priority.
osErrorNoMemory = 0x85, ///< system is out of memory: it was impossible to allocate or reserve memory for the operation.
osErrorValue = 0x86, ///< value of a parameter is out of range.
osErrorOS = 0xFF, ///< unspecified RTOS error: run-time error but no other error message fits.
os_status_reserved = 0x7FFFFFFF ///< prevent from enum down-size compiler optimization.
} osStatus;
/// Timer type value for the timer definition.
typedef enum {
osTimerOnce = 0, ///< one-shot timer
osTimerPeriodic = 1 ///< repeating timer
} os_timer_type;
/// Entry point of a thread.
typedef void (*os_pthread) (void const *argument);
/// Entry point of a timer call back function.
typedef void (*os_ptimer) (void const *argument);
// >>> the following data type definitions may shall adapted towards a specific RTOS
/// Thread ID identifies the thread (pointer to a thread control block).
typedef struct os_thread_cb *osThreadId;
/// Timer ID identifies the timer (pointer to a timer control block).
typedef struct os_timer_cb *osTimerId;
/// Mutex ID identifies the mutex (pointer to a mutex control block).
typedef struct os_mutex_cb *osMutexId;
/// Semaphore ID identifies the semaphore (pointer to a semaphore control block).
typedef struct os_semaphore_cb *osSemaphoreId;
/// Pool ID identifies the memory pool (pointer to a memory pool control block).
typedef struct os_pool_cb *osPoolId;
/// Message ID identifies the message queue (pointer to a message queue control block).
typedef struct os_messageQ_cb *osMessageQId;
/// Mail ID identifies the mail queue (pointer to a mail queue control block).
typedef struct os_mailQ_cb *osMailQId;
/// Thread Definition structure contains startup information of a thread.
typedef struct os_thread_def {
os_pthread pthread; ///< start address of thread function
osPriority tpriority; ///< initial thread priority
uint32_t instances; ///< maximum number of instances of that thread function
uint32_t stacksize; ///< stack size requirements in bytes; 0 is default stack size
} osThreadDef_t;
/// Timer Definition structure contains timer parameters.
typedef struct os_timer_def {
os_ptimer ptimer; ///< start address of a timer function
void *timer; ///< pointer to internal data
} osTimerDef_t;
/// Mutex Definition structure contains setup information for a mutex.
typedef struct os_mutex_def {
void *mutex; ///< pointer to internal data
} osMutexDef_t;
/// Semaphore Definition structure contains setup information for a semaphore.
typedef struct os_semaphore_def {
void *semaphore; ///< pointer to internal data
} osSemaphoreDef_t;
/// Definition structure for memory block allocation.
typedef struct os_pool_def {
uint32_t pool_sz; ///< number of items (elements) in the pool
uint32_t item_sz; ///< size of an item
void *pool; ///< pointer to memory for pool
} osPoolDef_t;
/// Definition structure for message queue.
typedef struct os_messageQ_def {
uint32_t queue_sz; ///< number of elements in the queue
void *pool; ///< memory array for messages
} osMessageQDef_t;
/// Definition structure for mail queue.
typedef struct os_mailQ_def {
uint32_t queue_sz; ///< number of elements in the queue
uint32_t item_sz; ///< size of an item
void *pool; ///< memory array for mail
} osMailQDef_t;
/// Event structure contains detailed information about an event.
typedef struct {
osStatus status; ///< status code: event or error information
union {
uint32_t v; ///< message as 32-bit value
void *p; ///< message or mail as void pointer
int32_t signals; ///< signal flags
} value; ///< event value
union {
osMailQId mail_id; ///< mail id obtained by \ref osMailCreate
osMessageQId message_id; ///< message id obtained by \ref osMessageCreate
} def; ///< event definition
} osEvent;
// ==== Kernel Control Functions ====
/// Initialize the RTOS Kernel for creating objects.
/// \return status code that indicates the execution status of the function.
osStatus osKernelInitialize (void);
/// Start the RTOS Kernel.
/// \return status code that indicates the execution status of the function.
osStatus osKernelStart (void);
/// Check if the RTOS kernel is already started.
/// \return 0 RTOS is not started, 1 RTOS is started.
int32_t osKernelRunning(void);
#if (defined (osFeature_SysTick) && (osFeature_SysTick != 0)) // System Timer available
/// \cond INTERNAL_VARIABLES
extern uint32_t const os_tickfreq;
extern uint16_t const os_tickus_i;
extern uint16_t const os_tickus_f;
/// \endcond
/// Get the RTOS kernel system timer counter.
/// \return RTOS kernel system timer as 32-bit value
uint32_t osKernelSysTick (void);
/// The RTOS kernel system timer frequency in Hz.
/// \note Reflects the system timer setting and is typically defined in a configuration file.
#define osKernelSysTickFrequency os_tickfreq
/// Convert a microseconds value to a RTOS kernel system timer value.
/// \param microsec time value in microseconds.
/// \return time value normalized to the \ref osKernelSysTickFrequency
/*
#define osKernelSysTickMicroSec(microsec) (((uint64_t)microsec * (osKernelSysTickFrequency)) / 1000000)
*/
#define osKernelSysTickMicroSec(microsec) ((microsec * os_tickus_i) + ((microsec * os_tickus_f) >> 16))
#endif // System Timer available
// ==== Thread Management ====
/// Create a Thread Definition with function, priority, and stack requirements.
/// \param name name of the thread function.
/// \param priority initial priority of the thread function.
/// \param instances number of possible thread instances.
/// \param stacksz stack size (in bytes) requirements for the thread function.
/// macro body is implementation specific in every CMSIS-RTOS.
#if defined (osObjectsExternal) // object is external
#define osThreadDef(name, priority, instances, stacksz) \
extern const osThreadDef_t os_thread_def_##name
#else // define the object
#define osThreadDef(name, priority, instances, stacksz) \
const osThreadDef_t os_thread_def_##name = \
{ (name), (priority), (instances), (stacksz) }
#endif
/// Access a Thread definition.
/// \param name name of the thread definition object.
/// macro body is implementation specific in every CMSIS-RTOS.
#define osThread(name) \
&os_thread_def_##name
/// Create a thread and add it to Active Threads and set it to state READY.
/// \param[in] thread_def thread definition referenced with \ref osThread.
/// \param[in] argument pointer that is passed to the thread function as start argument.
/// \return thread ID for reference by other functions or NULL in case of error.
osThreadId osThreadCreate (const osThreadDef_t *thread_def, void *argument);
/// Return the thread ID of the current running thread.
/// \return thread ID for reference by other functions or NULL in case of error.
osThreadId osThreadGetId (void);
/// Terminate execution of a thread and remove it from Active Threads.
/// \param[in] thread_id thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
/// \return status code that indicates the execution status of the function.
osStatus osThreadTerminate (osThreadId thread_id);
/// Pass control to next thread that is in state \b READY.
/// \return status code that indicates the execution status of the function.
osStatus osThreadYield (void);
/// Change priority of an active thread.
/// \param[in] thread_id thread ID obtained by \ref osThreadCreate 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 osThreadSetPriority (osThreadId thread_id, osPriority priority);
/// Get current priority of an active thread.
/// \param[in] thread_id thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
/// \return current priority value of the thread function.
osPriority osThreadGetPriority (osThreadId thread_id);
// ==== Generic Wait Functions ====
/// Wait for Timeout (Time Delay).
/// \param[in] millisec \ref CMSIS_RTOS_TimeOutValue "Time delay" value
/// \return status code that indicates the execution status of the function.
osStatus osDelay (uint32_t millisec);
#if (defined (osFeature_Wait) && (osFeature_Wait != 0)) // Generic Wait available
/// Wait for Signal, Message, Mail, or Timeout.
/// \param[in] millisec \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out
/// \return event that contains signal, message, or mail information or error code.
os_InRegs osEvent osWait (uint32_t millisec);
#endif // Generic Wait available
// ==== Timer Management Functions ====
/// Define a Timer object.
/// \param name name of the timer object.
/// \param function name of the timer call back function.
#if defined (osObjectsExternal) // object is external
#define osTimerDef(name, function) \
extern const osTimerDef_t os_timer_def_##name
#else // define the object
#define osTimerDef(name, function) \
uint32_t os_timer_cb_##name[6]; \
const osTimerDef_t os_timer_def_##name = \
{ (function), (os_timer_cb_##name) }
#endif
/// Access a Timer definition.
/// \param name name of the timer object.
#define osTimer(name) \
&os_timer_def_##name
/// Create a timer.
/// \param[in] timer_def timer object referenced with \ref osTimer.
/// \param[in] type osTimerOnce for one-shot or osTimerPeriodic for periodic behavior.
/// \param[in] argument argument to the timer call back function.
/// \return timer ID for reference by other functions or NULL in case of error.
osTimerId osTimerCreate (const osTimerDef_t *timer_def, os_timer_type type, void *argument);
/// Start or restart a timer.
/// \param[in] timer_id timer ID obtained by \ref osTimerCreate.
/// \param[in] millisec \ref CMSIS_RTOS_TimeOutValue "Time delay" value of the timer.
/// \return status code that indicates the execution status of the function.
osStatus osTimerStart (osTimerId timer_id, uint32_t millisec);
/// Stop the timer.
/// \param[in] timer_id timer ID obtained by \ref osTimerCreate.
/// \return status code that indicates the execution status of the function.
osStatus osTimerStop (osTimerId timer_id);
/// Delete a timer that was created by \ref osTimerCreate.
/// \param[in] timer_id timer ID obtained by \ref osTimerCreate.
/// \return status code that indicates the execution status of the function.
osStatus osTimerDelete (osTimerId timer_id);
// ==== Signal Management ====
/// Set the specified Signal Flags of an active thread.
/// \param[in] thread_id thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
/// \param[in] signals specifies the signal flags of the thread that should be set.
/// \return previous signal flags of the specified thread or 0x80000000 in case of incorrect parameters.
int32_t osSignalSet (osThreadId thread_id, int32_t signals);
/// Clear the specified Signal Flags of an active thread.
/// \param[in] thread_id thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
/// \param[in] signals specifies the signal flags of the thread that shall be cleared.
/// \return previous signal flags of the specified thread or 0x80000000 in case of incorrect parameters or call from ISR.
int32_t osSignalClear (osThreadId thread_id, int32_t signals);
/// Wait for one or more Signal Flags to become signaled for the current \b RUNNING thread.
/// \param[in] signals wait until all specified signal flags set or 0 for any single signal flag.
/// \param[in] millisec \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out.
/// \return event flag information or error code.
#if defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050)
#define osSignalWait __osSignalWait
osEvent __osSignalWait (int32_t signals, uint32_t millisec);
#else
os_InRegs osEvent osSignalWait (int32_t signals, uint32_t millisec);
#endif
// ==== Mutex Management ====
/// Define a Mutex.
/// \param name name of the mutex object.
#if defined (osObjectsExternal) // object is external
#define osMutexDef(name) \
extern const osMutexDef_t os_mutex_def_##name
#else // define the object
#define osMutexDef(name) \
uint32_t os_mutex_cb_##name[4] = { 0 }; \
const osMutexDef_t os_mutex_def_##name = { (os_mutex_cb_##name) }
#endif
/// Access a Mutex definition.
/// \param name name of the mutex object.
#define osMutex(name) \
&os_mutex_def_##name
/// Create and Initialize a Mutex object.
/// \param[in] mutex_def mutex definition referenced with \ref osMutex.
/// \return mutex ID for reference by other functions or NULL in case of error.
osMutexId osMutexCreate (const osMutexDef_t *mutex_def);
/// Wait until a Mutex becomes available.
/// \param[in] mutex_id mutex ID obtained by \ref osMutexCreate.
/// \param[in] millisec \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out.
/// \return status code that indicates the execution status of the function.
osStatus osMutexWait (osMutexId mutex_id, uint32_t millisec);
/// Release a Mutex that was obtained by \ref osMutexWait.
/// \param[in] mutex_id mutex ID obtained by \ref osMutexCreate.
/// \return status code that indicates the execution status of the function.
osStatus osMutexRelease (osMutexId mutex_id);
/// Delete a Mutex that was created by \ref osMutexCreate.
/// \param[in] mutex_id mutex ID obtained by \ref osMutexCreate.
/// \return status code that indicates the execution status of the function.
osStatus osMutexDelete (osMutexId mutex_id);
// ==== Semaphore Management Functions ====
#if (defined (osFeature_Semaphore) && (osFeature_Semaphore != 0)) // Semaphore available
/// Define a Semaphore object.
/// \param name name of the semaphore object.
#if defined (osObjectsExternal) // object is external
#define osSemaphoreDef(name) \
extern const osSemaphoreDef_t os_semaphore_def_##name
#else // define the object
#define osSemaphoreDef(name) \
uint32_t os_semaphore_cb_##name[2] = { 0 }; \
const osSemaphoreDef_t os_semaphore_def_##name = { (os_semaphore_cb_##name) }
#endif
/// Access a Semaphore definition.
/// \param name name of the semaphore object.
#define osSemaphore(name) \
&os_semaphore_def_##name
/// Create and Initialize a Semaphore object used for managing resources.
/// \param[in] semaphore_def semaphore definition referenced with \ref osSemaphore.
/// \param[in] count number of available resources.
/// \return semaphore ID for reference by other functions or NULL in case of error.
osSemaphoreId osSemaphoreCreate (const osSemaphoreDef_t *semaphore_def, int32_t count);
/// Wait until a Semaphore token becomes available.
/// \param[in] semaphore_id semaphore object referenced with \ref osSemaphoreCreate.
/// \param[in] millisec \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out.
/// \return number of available tokens, or -1 in case of incorrect parameters.
int32_t osSemaphoreWait (osSemaphoreId semaphore_id, uint32_t millisec);
/// Release a Semaphore token.
/// \param[in] semaphore_id semaphore object referenced with \ref osSemaphoreCreate.
/// \return status code that indicates the execution status of the function.
osStatus osSemaphoreRelease (osSemaphoreId semaphore_id);
/// Delete a Semaphore that was created by \ref osSemaphoreCreate.
/// \param[in] semaphore_id semaphore object referenced with \ref osSemaphoreCreate.
/// \return status code that indicates the execution status of the function.
osStatus osSemaphoreDelete (osSemaphoreId semaphore_id);
#endif // Semaphore available
// ==== Memory Pool Management Functions ====
#if (defined (osFeature_Pool) && (osFeature_Pool != 0)) // Memory Pool Management available
/// \brief Define a Memory Pool.
/// \param name name of the memory pool.
/// \param no maximum number of blocks (objects) in the memory pool.
/// \param type data type of a single block (object).
#if defined (osObjectsExternal) // object is external
#define osPoolDef(name, no, type) \
extern const osPoolDef_t os_pool_def_##name
#else // define the object
#define osPoolDef(name, no, type) \
uint32_t os_pool_m_##name[3+((sizeof(type)+3)/4)*(no)]; \
const osPoolDef_t os_pool_def_##name = \
{ (no), sizeof(type), (os_pool_m_##name) }
#endif
/// \brief Access a Memory Pool definition.
/// \param name name of the memory pool
#define osPool(name) \
&os_pool_def_##name
/// Create and Initialize a memory pool.
/// \param[in] pool_def memory pool definition referenced with \ref osPool.
/// \return memory pool ID for reference by other functions or NULL in case of error.
osPoolId osPoolCreate (const osPoolDef_t *pool_def);
/// Allocate a memory block from a memory pool.
/// \param[in] pool_id memory pool ID obtain referenced with \ref osPoolCreate.
/// \return address of the allocated memory block or NULL in case of no memory available.
void *osPoolAlloc (osPoolId pool_id);
/// Allocate a memory block from a memory pool and set memory block to zero.
/// \param[in] pool_id memory pool ID obtain referenced with \ref osPoolCreate.
/// \return address of the allocated memory block or NULL in case of no memory available.
void *osPoolCAlloc (osPoolId pool_id);
/// Return an allocated memory block back to a specific memory pool.
/// \param[in] pool_id memory pool ID obtain referenced with \ref osPoolCreate.
/// \param[in] block address of the allocated memory block that is returned to the memory pool.
/// \return status code that indicates the execution status of the function.
osStatus osPoolFree (osPoolId pool_id, void *block);
#endif // Memory Pool Management available
// ==== Message Queue Management Functions ====
#if (defined (osFeature_MessageQ) && (osFeature_MessageQ != 0)) // Message Queues available
/// \brief Create a Message Queue Definition.
/// \param name name of the queue.
/// \param queue_sz maximum number of messages in the queue.
/// \param type data type of a single message element (for debugger).
#if defined (osObjectsExternal) // object is external
#define osMessageQDef(name, queue_sz, type) \
extern const osMessageQDef_t os_messageQ_def_##name
#else // define the object
#define osMessageQDef(name, queue_sz, type) \
uint32_t os_messageQ_q_##name[4+(queue_sz)] = { 0 }; \
const osMessageQDef_t os_messageQ_def_##name = \
{ (queue_sz), (os_messageQ_q_##name) }
#endif
/// \brief Access a Message Queue Definition.
/// \param name name of the queue
#define osMessageQ(name) \
&os_messageQ_def_##name
/// Create and Initialize a Message Queue.
/// \param[in] queue_def queue definition referenced with \ref osMessageQ.
/// \param[in] thread_id thread ID (obtained by \ref osThreadCreate or \ref osThreadGetId) or NULL.
/// \return message queue ID for reference by other functions or NULL in case of error.
osMessageQId osMessageCreate (const osMessageQDef_t *queue_def, osThreadId thread_id);
/// Put a Message to a Queue.
/// \param[in] queue_id message queue ID obtained with \ref osMessageCreate.
/// \param[in] info message information.
/// \param[in] millisec \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out.
/// \return status code that indicates the execution status of the function.
osStatus osMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec);
/// Get a Message or Wait for a Message from a Queue.
/// \param[in] queue_id message queue ID obtained with \ref osMessageCreate.
/// \param[in] millisec \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out.
/// \return event information that includes status code.
#if defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050)
#define osMessageGet __osMessageGet
osEvent __osMessageGet (osMessageQId queue_id, uint32_t millisec);
#else
os_InRegs osEvent osMessageGet (osMessageQId queue_id, uint32_t millisec);
#endif
#endif // Message Queues available
// ==== Mail Queue Management Functions ====
#if (defined (osFeature_MailQ) && (osFeature_MailQ != 0)) // Mail Queues available
/// \brief Create a Mail Queue Definition.
/// \param name name of the queue
/// \param queue_sz maximum number of messages in queue
/// \param type data type of a single message element
#if defined (osObjectsExternal) // object is external
#define osMailQDef(name, queue_sz, type) \
extern const osMailQDef_t os_mailQ_def_##name
#else // define the object
#define osMailQDef(name, queue_sz, type) \
uint32_t os_mailQ_q_##name[4+(queue_sz)] = { 0 }; \
uint32_t os_mailQ_m_##name[3+((sizeof(type)+3)/4)*(queue_sz)]; \
void * os_mailQ_p_##name[2] = { (os_mailQ_q_##name), os_mailQ_m_##name }; \
const osMailQDef_t os_mailQ_def_##name = \
{ (queue_sz), sizeof(type), (os_mailQ_p_##name) }
#endif
/// \brief Access a Mail Queue Definition.
/// \param name name of the queue
#define osMailQ(name) \
&os_mailQ_def_##name
/// Create and Initialize mail queue.
/// \param[in] queue_def reference to the mail queue definition obtain with \ref osMailQ
/// \param[in] thread_id thread ID (obtained by \ref osThreadCreate or \ref osThreadGetId) or NULL.
/// \return mail queue ID for reference by other functions or NULL in case of error.
osMailQId osMailCreate (const osMailQDef_t *queue_def, osThreadId thread_id);
/// Allocate a memory block from a mail.
/// \param[in] queue_id mail queue ID obtained with \ref osMailCreate.
/// \param[in] millisec \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out
/// \return pointer to memory block that can be filled with mail or NULL in case of error.
void *osMailAlloc (osMailQId queue_id, uint32_t millisec);
/// Allocate a memory block from a mail and set memory block to zero.
/// \param[in] queue_id mail queue ID obtained with \ref osMailCreate.
/// \param[in] millisec \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out
/// \return pointer to memory block that can be filled with mail or NULL in case of error.
void *osMailCAlloc (osMailQId queue_id, uint32_t millisec);
/// Put a mail to a queue.
/// \param[in] queue_id mail queue ID obtained with \ref osMailCreate.
/// \param[in] mail memory block previously allocated with \ref osMailAlloc or \ref osMailCAlloc.
/// \return status code that indicates the execution status of the function.
osStatus osMailPut (osMailQId queue_id, void *mail);
/// Get a mail from a queue.
/// \param[in] queue_id mail queue ID obtained with \ref osMailCreate.
/// \param[in] millisec \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out
/// \return event that contains mail information or error code.
#if defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050)
#define osMailGet __osMailGet
osEvent __osMailGet (osMailQId queue_id, uint32_t millisec);
#else
os_InRegs osEvent osMailGet (osMailQId queue_id, uint32_t millisec);
#endif
/// Free a memory block from a mail.
/// \param[in] queue_id mail queue ID obtained with \ref osMailCreate.
/// \param[in] mail pointer to the memory block that was obtained with \ref osMailGet.
/// \return status code that indicates the execution status of the function.
osStatus osMailFree (osMailQId queue_id, void *mail);
#endif // Mail Queues available
// ==== RTX Extensions ====
/// Suspend the RTX task scheduler.
/// \return number of ticks, for how long the system can sleep or power-down.
uint32_t os_suspend (void);
/// Resume the RTX task scheduler.
/// \param[in] sleep_time specifies how long the system was in sleep or power-down mode.
void os_resume (uint32_t sleep_time);
/// OS idle demon (running when no other thread is ready to run).
__NO_RETURN void os_idle_demon (void);
/// OS error callback (called when a runtime error is detected).
/// \param[in] error_code actual error code that has been detected.
__NO_RETURN void os_error (uint32_t error_code);
#ifdef __cplusplus
}
#endif
#endif // _CMSIS_OS_H
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