mbed official / mbed-rtos

Official mbed Real Time Operating System based on the RTX implementation of the CMSIS-RTOS API open standard.

Dependents:   denki-yohou_b TestY201 Network-RTOS NTPClient_HelloWorld ... more

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Thread Class Reference
Public Types | Public Member Functions | Static Public Member Functions

Thread Class Reference
[Rtos]

The Thread class allow defining, creating, and controlling thread functions in the system. More...

#include <Thread.h>

Public Types

enum  State {
  Inactive, Ready, Running, WaitingDelay,
  WaitingInterval, WaitingOr, WaitingAnd, WaitingSemaphore,
  WaitingMailbox, WaitingMutex, Deleted
}
 

State of the Thread.

More...

Public Member Functions

 Thread (osPriority priority=osPriorityNormal, uint32_t stack_size=DEFAULT_STACK_SIZE, unsigned char *stack_pointer=NULL)
 Allocate a new thread without starting execution.
 MBED_DEPRECATED_SINCE ("mbed-os-5.1","Thread-spawning constructors hide errors. ""Replaced by thread.start(task).") Thread(mbed
 Create a new thread, and start it executing the specified function.
template<typename T >
 MBED_DEPRECATED_SINCE ("mbed-os-5.1","Thread-spawning constructors hide errors. ""Replaced by thread.start(callback(task, argument)).") Thread(T *argument
 Create a new thread, and start it executing the specified function.
template<typename T , typename M >
 MBED_DEPRECATED_SINCE ("mbed-os-5.1","The start function does not support cv-qualifiers. ""Replaced by thread.start(callback(obj, method)).") osStatus start(T *obj
 Starts a thread executing the specified function.
osStatus join ()
 Wait for thread to terminate.
osStatus terminate ()
 Terminate execution of a thread and remove it from Active Threads.
osStatus set_priority (osPriority priority)
 Set priority of an active thread.
osPriority get_priority ()
 Get priority of an active thread.
int32_t signal_set (int32_t signals)
 Set the specified Signal Flags of an active thread.
int32_t signal_clr (int32_t signals)
 Clears the specified Signal Flags of an active thread.
State get_state ()
 State of this Thread.
uint32_t stack_size ()
 Get the total stack memory size for this Thread.
uint32_t free_stack ()
 Get the currently unused stack memory for this Thread.
uint32_t used_stack ()
 Get the currently used stack memory for this Thread.
uint32_t max_stack ()
 Get the maximum stack memory usage to date for this Thread.

Static Public Member Functions

static osEvent signal_wait (int32_t signals, uint32_t millisec=osWaitForever)
 Wait for one or more Signal Flags to become signaled for the current RUNNING thread.
static osStatus wait (uint32_t millisec)
 Wait for a specified time period in millisec:
static osStatus yield ()
 Pass control to next thread that is in state READY.
static osThreadId gettid ()
 Get the thread id of the current running thread.
static void attach_idle_hook (void(*fptr)(void))
 Attach a function to be called by the RTOS idle task.
static void attach_terminate_hook (void(*fptr)(osThreadId id))
 Attach a function to be called when a task is killed.

Detailed Description

The Thread class allow defining, creating, and controlling thread functions in the system.

Example: 

  #include "mbed.h"
  #include "rtos.h"

  Thread thread;
  DigitalOut led1(LED1);
  volatile bool running = true;

  // Blink function toggles the led in a long running loop
  void blink(DigitalOut *led) {
      while (running) {
          *led = !*led;
          Thread::wait(1000);
      }
  }

  // Spawns a thread to run blink for 5 seconds
  int main() {
      thread.start(led1, blink);
      Thread::wait(5000);
      running = false;
      thread.join();
  }

Definition at line 64 of file Thread.h.

Constructor & Destructor Documentation

Thread ( osPriority  priority = osPriorityNormal,
uint32_t  stack_size = DEFAULT_STACK_SIZE,
unsigned char *  stack_pointer = NULL 
)

Allocate a new thread without starting execution.

Parameters:
priorityinitial priority of the thread function. (default: osPriorityNormal).
stack_sizestack size (in bytes) requirements for the thread function. (default: DEFAULT_STACK_SIZE).
stack_pointerpointer to the stack area to be used by this thread (default: NULL).

Definition at line 71 of file Thread.h.

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