Diff: rtos/Thread.h

Revision:

111:de54bc598ef1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtos/Thread.h	Fri Apr 29 14:04:02 2016 +0000
@@ -0,0 +1,149 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef THREAD_H
+#define THREAD_H
+
+#include <stdint.h>
+#include "cmsis_os.h"
+
+namespace rtos {
+
+/** The Thread class allow defining, creating, and controlling thread functions in the system. */
+class Thread {
+public:
+    /** Create a new thread, and start it executing the specified function.
+      @param   task           function to be executed by this thread.
+      @param   argument       pointer that is passed to the thread function as start argument. (default: NULL).
+      @param   priority       initial priority of the thread function. (default: osPriorityNormal).
+      @param   stack_size      stack size (in bytes) requirements for the thread function. (default: DEFAULT_STACK_SIZE).
+      @param   stack_pointer  pointer to the stack area to be used by this thread (default: NULL).
+    */
+    Thread(void (*task)(void const *argument), void *argument=NULL,
+           osPriority priority=osPriorityNormal,
+           uint32_t stack_size=DEFAULT_STACK_SIZE,
+           unsigned char *stack_pointer=NULL);
+
+    /** Terminate execution of a thread and remove it from Active Threads
+      @return  status code that indicates the execution status of the function.
+    */
+    osStatus terminate();
+
+    /** Set priority of an active thread
+      @param   priority  new priority value for the thread function.
+      @return  status code that indicates the execution status of the function.
+    */
+    osStatus set_priority(osPriority priority);
+
+    /** Get priority of an active thread
+      @return  current priority value of the thread function.
+    */
+    osPriority get_priority();
+
+    /** Set the specified Signal Flags of an active thread.
+      @param   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 signal_set(int32_t signals);
+
+    /** Clears the specified Signal Flags of an active thread.
+      @param   signals  specifies the signal flags of the thread that should be cleared.
+      @return  resultant signal flags of the specified thread or 0x80000000 in case of incorrect parameters.
+    */
+    int32_t signal_clr(int32_t signals);
+
+    /** State of the Thread */
+    enum State {
+        Inactive,           /**< Not created or terminated */
+        Ready,              /**< Ready to run */
+        Running,            /**< Running */
+        WaitingDelay,       /**< Waiting for a delay to occur */
+        WaitingInterval,    /**< Waiting for an interval to occur */
+        WaitingOr,          /**< Waiting for one event in a set to occur */
+        WaitingAnd,         /**< Waiting for multiple events in a set to occur */
+        WaitingSemaphore,   /**< Waiting for a semaphore event to occur */
+        WaitingMailbox,     /**< Waiting for a mailbox event to occur */
+        WaitingMutex,       /**< Waiting for a mutex event to occur */
+    };
+
+    /** State of this Thread
+      @return  the State of this Thread
+    */
+    State get_state();
+    
+    /** Get the total stack memory size for this Thread
+      @return  the total stack memory size in bytes
+    */
+    uint32_t stack_size();
+    
+    /** Get the currently unused stack memory for this Thread
+      @return  the currently unused stack memory in bytes
+    */
+    uint32_t free_stack();
+    
+    /** Get the currently used stack memory for this Thread
+      @return  the currently used stack memory in bytes
+    */
+    uint32_t used_stack();
+    
+    /** Get the maximum stack memory usage to date for this Thread
+      @return  the maximum stack memory usage to date in bytes
+    */
+    uint32_t max_stack();
+
+    /** Wait for one or more Signal Flags to become signaled for the current RUNNING thread.
+      @param   signals   wait until all specified signal flags set or 0 for any single signal flag.
+      @param   millisec  timeout value or 0 in case of no time-out. (default: osWaitForever).
+      @return  event flag information or error code.
+    */
+    static osEvent signal_wait(int32_t signals, uint32_t millisec=osWaitForever);
+
+    /** Wait for a specified time period in millisec:
+      @param   millisec  time delay value
+      @return  status code that indicates the execution status of the function.
+    */
+    static osStatus wait(uint32_t millisec);
+
+    /** Pass control to next thread that is in state READY.
+      @return  status code that indicates the execution status of the function.
+    */
+    static osStatus yield();
+
+    /** Get the thread id of the current running thread.
+      @return  thread ID for reference by other functions or NULL in case of error.
+    */
+    static osThreadId gettid();
+    
+    /** Attach a function to be called by the RTOS idle task
+      @param   fptr  pointer to the function to be called
+    */
+    static void attach_idle_hook(void (*fptr)(void));
+
+    virtual ~Thread();
+
+private:
+    osThreadId _tid;
+    osThreadDef_t _thread_def;
+    bool _dynamic_stack;
+};
+
+}
+#endif