Alan Song / mbed-rtos

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Fork of mbed-rtos by mbed official

rtos/Thread.h@8:88a1a9c26ae3, 2012-11-27 (annotated)

Committer:
emilmont
Date:
Tue Nov 27 16:55:38 2012 +0000
Revision:
8:88a1a9c26ae3
Parent:
6:350b53afb889
Child:
31:015df9e602b6
Add "Thread::get_state" method.; Update license.; Update documentation.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 8:88a1a9c26ae3 1 /* mbed Microcontroller Library
emilmont 8:88a1a9c26ae3 2 * Copyright (c) 2006-2012 ARM Limited
emilmont 8:88a1a9c26ae3 3 *
emilmont 8:88a1a9c26ae3 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
emilmont 8:88a1a9c26ae3 5 * of this software and associated documentation files (the "Software"), to deal
emilmont 8:88a1a9c26ae3 6 * in the Software without restriction, including without limitation the rights
emilmont 8:88a1a9c26ae3 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
emilmont 8:88a1a9c26ae3 8 * copies of the Software, and to permit persons to whom the Software is
emilmont 8:88a1a9c26ae3 9 * furnished to do so, subject to the following conditions:
emilmont 8:88a1a9c26ae3 10 *
emilmont 8:88a1a9c26ae3 11 * The above copyright notice and this permission notice shall be included in
emilmont 8:88a1a9c26ae3 12 * all copies or substantial portions of the Software.
emilmont 8:88a1a9c26ae3 13 *
emilmont 8:88a1a9c26ae3 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
emilmont 8:88a1a9c26ae3 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
emilmont 8:88a1a9c26ae3 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
emilmont 8:88a1a9c26ae3 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
emilmont 8:88a1a9c26ae3 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
emilmont 8:88a1a9c26ae3 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
emilmont 8:88a1a9c26ae3 20 * SOFTWARE.
emilmont 8:88a1a9c26ae3 21 */
emilmont 6:350b53afb889 22 #ifndef THREAD_H
emilmont 8:88a1a9c26ae3 23 #define THREAD_H
emilmont 6:350b53afb889 24
emilmont 6:350b53afb889 25 #include <stdint.h>
emilmont 6:350b53afb889 26 #include "cmsis_os.h"
emilmont 6:350b53afb889 27
emilmont 6:350b53afb889 28 namespace rtos {
emilmont 6:350b53afb889 29
emilmont 8:88a1a9c26ae3 30 /** The Thread class allow defining, creating, and controlling thread functions in the system. */
emilmont 6:350b53afb889 31 class Thread {
emilmont 6:350b53afb889 32 public:
emilmont 8:88a1a9c26ae3 33 /** Create a new thread, and start it executing the specified function.
emilmont 8:88a1a9c26ae3 34 @param task function to be executed by this thread.
emilmont 8:88a1a9c26ae3 35 @param argument pointer that is passed to the thread function as start argument. (default: NULL).
emilmont 8:88a1a9c26ae3 36 @param priority initial priority of the thread function. (default: osPriorityNormal).
emilmont 8:88a1a9c26ae3 37 @param stack_size stack size (in bytes) requirements for the thread function. (default: DEFAULT_STACK_SIZE).
emilmont 8:88a1a9c26ae3 38 @param stack_pointer pointer to the stack area to be used by this thread (default: NULL).
emilmont 6:350b53afb889 39 */
emilmont 6:350b53afb889 40 Thread(void (*task)(void const *argument), void *argument=NULL,
emilmont 6:350b53afb889 41 osPriority priority=osPriorityNormal,
emilmont 6:350b53afb889 42 uint32_t stack_size=DEFAULT_STACK_SIZE,
emilmont 6:350b53afb889 43 unsigned char *stack_pointer=NULL);
emilmont 6:350b53afb889 44
emilmont 8:88a1a9c26ae3 45 /** Terminate execution of a thread and remove it from Active Threads
emilmont 8:88a1a9c26ae3 46 @return status code that indicates the execution status of the function.
emilmont 6:350b53afb889 47 */
emilmont 6:350b53afb889 48 osStatus terminate();
emilmont 6:350b53afb889 49
emilmont 8:88a1a9c26ae3 50 /** Set priority of an active thread
emilmont 8:88a1a9c26ae3 51 @param priority new priority value for the thread function.
emilmont 8:88a1a9c26ae3 52 @return status code that indicates the execution status of the function.
emilmont 6:350b53afb889 53 */
emilmont 6:350b53afb889 54 osStatus set_priority(osPriority priority);
emilmont 6:350b53afb889 55
emilmont 8:88a1a9c26ae3 56 /** Get priority of an active thread
emilmont 8:88a1a9c26ae3 57 @return current priority value of the thread function.
emilmont 6:350b53afb889 58 */
emilmont 6:350b53afb889 59 osPriority get_priority();
emilmont 6:350b53afb889 60
emilmont 8:88a1a9c26ae3 61 /** Set the specified Signal Flags of an active thread.
emilmont 8:88a1a9c26ae3 62 @param signals specifies the signal flags of the thread that should be set.
emilmont 8:88a1a9c26ae3 63 @return previous signal flags of the specified thread or 0x80000000 in case of incorrect parameters.
emilmont 6:350b53afb889 64 */
emilmont 6:350b53afb889 65 int32_t signal_set(int32_t signals);
emilmont 6:350b53afb889 66
emilmont 8:88a1a9c26ae3 67 /** State of the Thread */
emilmont 8:88a1a9c26ae3 68 enum State {
emilmont 8:88a1a9c26ae3 69 Inactive, /**< Not created or terminated */
emilmont 8:88a1a9c26ae3 70 Ready, /**< Ready to run */
emilmont 8:88a1a9c26ae3 71 Running, /**< Running */
emilmont 8:88a1a9c26ae3 72 WaitingDelay, /**< Waiting for a delay to occur */
emilmont 8:88a1a9c26ae3 73 WaitingInterval, /**< Waiting for an interval to occur */
emilmont 8:88a1a9c26ae3 74 WaitingOr, /**< Waiting for one event in a set to occur */
emilmont 8:88a1a9c26ae3 75 WaitingAnd, /**< Waiting for multiple events in a set to occur */
emilmont 8:88a1a9c26ae3 76 WaitingSemaphore, /**< Waiting for a semaphore event to occur */
emilmont 8:88a1a9c26ae3 77 WaitingMailbox, /**< Waiting for a mailbox event to occur */
emilmont 8:88a1a9c26ae3 78 WaitingMutex, /**< Waiting for a mutex event to occur */
emilmont 8:88a1a9c26ae3 79 };
emilmont 8:88a1a9c26ae3 80
emilmont 8:88a1a9c26ae3 81 /** State of this Thread
emilmont 8:88a1a9c26ae3 82 @return the State of this Thread
emilmont 8:88a1a9c26ae3 83 */
emilmont 8:88a1a9c26ae3 84 State get_state();
emilmont 8:88a1a9c26ae3 85
emilmont 8:88a1a9c26ae3 86 /** Wait for one or more Signal Flags to become signaled for the current RUNNING thread.
emilmont 8:88a1a9c26ae3 87 @param signals wait until all specified signal flags set or 0 for any single signal flag.
emilmont 8:88a1a9c26ae3 88 @param millisec timeout value or 0 in case of no time-out. (default: osWaitForever).
emilmont 8:88a1a9c26ae3 89 @return event flag information or error code.
emilmont 6:350b53afb889 90 */
emilmont 6:350b53afb889 91 static osEvent signal_wait(int32_t signals, uint32_t millisec=osWaitForever);
emilmont 6:350b53afb889 92
emilmont 8:88a1a9c26ae3 93 /** Wait for a specified time period in millisec:
emilmont 8:88a1a9c26ae3 94 @param millisec time delay value
emilmont 8:88a1a9c26ae3 95 @return status code that indicates the execution status of the function.
emilmont 6:350b53afb889 96 */
emilmont 6:350b53afb889 97 static osStatus wait(uint32_t millisec);
emilmont 6:350b53afb889 98
emilmont 8:88a1a9c26ae3 99 /** Pass control to next thread that is in state READY.
emilmont 8:88a1a9c26ae3 100 @return status code that indicates the execution status of the function.
emilmont 6:350b53afb889 101 */
emilmont 6:350b53afb889 102 static osStatus yield();
emilmont 6:350b53afb889 103
emilmont 8:88a1a9c26ae3 104 /** Get the thread id of the current running thread.
emilmont 8:88a1a9c26ae3 105 @return thread ID for reference by other functions or NULL in case of error.
emilmont 6:350b53afb889 106 */
emilmont 6:350b53afb889 107 static osThreadId gettid();
emilmont 6:350b53afb889 108
emilmont 6:350b53afb889 109 virtual ~Thread();
emilmont 6:350b53afb889 110
emilmont 6:350b53afb889 111 private:
emilmont 6:350b53afb889 112 osThreadId _tid;
emilmont 6:350b53afb889 113 osThreadDef_t _thread_def;
emilmont 6:350b53afb889 114 bool _dynamic_stack;
emilmont 6:350b53afb889 115 };
emilmont 6:350b53afb889 116
emilmont 6:350b53afb889 117 }
emilmont 6:350b53afb889 118 #endif