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rtos/Thread.h@109:f37e70028583, 2016-05-13 (annotated)

Committer:
Reynier
Date:
Fri May 13 21:42:20 2016 +0000
Revision:
109:f37e70028583
Parent:
107:bdd541595fc5 
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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);
mbed_official 31:015df9e602b6 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();
mbed_official 31:015df9e602b6 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);
mbed_official 31:015df9e602b6 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();
mbed_official 31:015df9e602b6 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);
mbed_official 31:015df9e602b6 66
mbed_official 76:85a52b7ef44b 67 /** Clears the specified Signal Flags of an active thread.
mbed_official 76:85a52b7ef44b 68 @param signals specifies the signal flags of the thread that should be cleared.
mbed_official 76:85a52b7ef44b 69 @return resultant signal flags of the specified thread or 0x80000000 in case of incorrect parameters.
mbed_official 76:85a52b7ef44b 70 */
mbed_official 76:85a52b7ef44b 71 int32_t signal_clr(int32_t signals);
mbed_official 76:85a52b7ef44b 72
emilmont 8:88a1a9c26ae3 73 /** State of the Thread */
emilmont 8:88a1a9c26ae3 74 enum State {
emilmont 8:88a1a9c26ae3 75 Inactive, /**< Not created or terminated */
emilmont 8:88a1a9c26ae3 76 Ready, /**< Ready to run */
emilmont 8:88a1a9c26ae3 77 Running, /**< Running */
emilmont 8:88a1a9c26ae3 78 WaitingDelay, /**< Waiting for a delay to occur */
emilmont 8:88a1a9c26ae3 79 WaitingInterval, /**< Waiting for an interval to occur */
emilmont 8:88a1a9c26ae3 80 WaitingOr, /**< Waiting for one event in a set to occur */
emilmont 8:88a1a9c26ae3 81 WaitingAnd, /**< Waiting for multiple events in a set to occur */
emilmont 8:88a1a9c26ae3 82 WaitingSemaphore, /**< Waiting for a semaphore event to occur */
emilmont 8:88a1a9c26ae3 83 WaitingMailbox, /**< Waiting for a mailbox event to occur */
emilmont 8:88a1a9c26ae3 84 WaitingMutex, /**< Waiting for a mutex event to occur */
emilmont 8:88a1a9c26ae3 85 };
mbed_official 31:015df9e602b6 86
emilmont 8:88a1a9c26ae3 87 /** State of this Thread
emilmont 8:88a1a9c26ae3 88 @return the State of this Thread
emilmont 8:88a1a9c26ae3 89 */
emilmont 8:88a1a9c26ae3 90 State get_state();
mbed_official 84:143955ffb790 91
mbed_official 84:143955ffb790 92 /** Get the total stack memory size for this Thread
mbed_official 84:143955ffb790 93 @return the total stack memory size in bytes
mbed_official 84:143955ffb790 94 */
mbed_official 84:143955ffb790 95 uint32_t stack_size();
mbed_official 84:143955ffb790 96
mbed_official 84:143955ffb790 97 /** Get the currently unused stack memory for this Thread
mbed_official 84:143955ffb790 98 @return the currently unused stack memory in bytes
mbed_official 84:143955ffb790 99 */
mbed_official 84:143955ffb790 100 uint32_t free_stack();
mbed_official 84:143955ffb790 101
mbed_official 84:143955ffb790 102 /** Get the currently used stack memory for this Thread
mbed_official 84:143955ffb790 103 @return the currently used stack memory in bytes
mbed_official 84:143955ffb790 104 */
mbed_official 84:143955ffb790 105 uint32_t used_stack();
mbed_official 84:143955ffb790 106
mbed_official 84:143955ffb790 107 /** Get the maximum stack memory usage to date for this Thread
mbed_official 84:143955ffb790 108 @return the maximum stack memory usage to date in bytes
mbed_official 84:143955ffb790 109 */
mbed_official 84:143955ffb790 110 uint32_t max_stack();
mbed_official 31:015df9e602b6 111
mbed_official 31:015df9e602b6 112 /** Wait for one or more Signal Flags to become signaled for the current RUNNING thread.
emilmont 8:88a1a9c26ae3 113 @param signals wait until all specified signal flags set or 0 for any single signal flag.
emilmont 8:88a1a9c26ae3 114 @param millisec timeout value or 0 in case of no time-out. (default: osWaitForever).
emilmont 8:88a1a9c26ae3 115 @return event flag information or error code.
emilmont 6:350b53afb889 116 */
emilmont 6:350b53afb889 117 static osEvent signal_wait(int32_t signals, uint32_t millisec=osWaitForever);
mbed_official 31:015df9e602b6 118
emilmont 8:88a1a9c26ae3 119 /** Wait for a specified time period in millisec:
emilmont 8:88a1a9c26ae3 120 @param millisec time delay value
mbed_official 31:015df9e602b6 121 @return status code that indicates the execution status of the function.
emilmont 6:350b53afb889 122 */
emilmont 6:350b53afb889 123 static osStatus wait(uint32_t millisec);
mbed_official 31:015df9e602b6 124
emilmont 8:88a1a9c26ae3 125 /** Pass control to next thread that is in state READY.
emilmont 8:88a1a9c26ae3 126 @return status code that indicates the execution status of the function.
emilmont 6:350b53afb889 127 */
emilmont 6:350b53afb889 128 static osStatus yield();
mbed_official 31:015df9e602b6 129
emilmont 8:88a1a9c26ae3 130 /** Get the thread id of the current running thread.
emilmont 8:88a1a9c26ae3 131 @return thread ID for reference by other functions or NULL in case of error.
emilmont 6:350b53afb889 132 */
emilmont 6:350b53afb889 133 static osThreadId gettid();
mbed_official 107:bdd541595fc5 134
mbed_official 107:bdd541595fc5 135 /** Attach a function to be called by the RTOS idle task
mbed_official 107:bdd541595fc5 136 @param fptr pointer to the function to be called
mbed_official 107:bdd541595fc5 137 */
mbed_official 107:bdd541595fc5 138 static void attach_idle_hook(void (*fptr)(void));
mbed_official 31:015df9e602b6 139
emilmont 6:350b53afb889 140 virtual ~Thread();
emilmont 6:350b53afb889 141
emilmont 6:350b53afb889 142 private:
emilmont 6:350b53afb889 143 osThreadId _tid;
emilmont 6:350b53afb889 144 osThreadDef_t _thread_def;
emilmont 6:350b53afb889 145 bool _dynamic_stack;
emilmont 6:350b53afb889 146 };
emilmont 6:350b53afb889 147
emilmont 6:350b53afb889 148 }
emilmont 6:350b53afb889 149 #endif