takashi kadono / Mbed OS Nucleo_446

Color Oled(SSD1331) connect to STMicroelectronics Nucleo-F466

Dependencies:   ssd1331

mbed-os/rtos/Mutex.h@0:8fdf9a60065b, 2018-10-10 (annotated)

Committer:
kadonotakashi
Date:
Wed Oct 10 00:33:53 2018 +0000
Revision:
0:8fdf9a60065b
how to make mbed librry

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kadonotakashi 0:8fdf9a60065b 1 /* mbed Microcontroller Library
kadonotakashi 0:8fdf9a60065b 2 * Copyright (c) 2006-2012 ARM Limited
kadonotakashi 0:8fdf9a60065b 3 *
kadonotakashi 0:8fdf9a60065b 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
kadonotakashi 0:8fdf9a60065b 5 * of this software and associated documentation files (the "Software"), to deal
kadonotakashi 0:8fdf9a60065b 6 * in the Software without restriction, including without limitation the rights
kadonotakashi 0:8fdf9a60065b 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
kadonotakashi 0:8fdf9a60065b 8 * copies of the Software, and to permit persons to whom the Software is
kadonotakashi 0:8fdf9a60065b 9 * furnished to do so, subject to the following conditions:
kadonotakashi 0:8fdf9a60065b 10 *
kadonotakashi 0:8fdf9a60065b 11 * The above copyright notice and this permission notice shall be included in
kadonotakashi 0:8fdf9a60065b 12 * all copies or substantial portions of the Software.
kadonotakashi 0:8fdf9a60065b 13 *
kadonotakashi 0:8fdf9a60065b 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
kadonotakashi 0:8fdf9a60065b 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
kadonotakashi 0:8fdf9a60065b 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
kadonotakashi 0:8fdf9a60065b 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
kadonotakashi 0:8fdf9a60065b 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
kadonotakashi 0:8fdf9a60065b 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
kadonotakashi 0:8fdf9a60065b 20 * SOFTWARE.
kadonotakashi 0:8fdf9a60065b 21 */
kadonotakashi 0:8fdf9a60065b 22 #ifndef MUTEX_H
kadonotakashi 0:8fdf9a60065b 23 #define MUTEX_H
kadonotakashi 0:8fdf9a60065b 24
kadonotakashi 0:8fdf9a60065b 25 #include <stdint.h>
kadonotakashi 0:8fdf9a60065b 26 #include "cmsis_os2.h"
kadonotakashi 0:8fdf9a60065b 27 #include "mbed_rtos1_types.h"
kadonotakashi 0:8fdf9a60065b 28 #include "mbed_rtos_storage.h"
kadonotakashi 0:8fdf9a60065b 29
kadonotakashi 0:8fdf9a60065b 30 #include "platform/NonCopyable.h"
kadonotakashi 0:8fdf9a60065b 31 #include "platform/ScopedLock.h"
kadonotakashi 0:8fdf9a60065b 32 #include "platform/mbed_toolchain.h"
kadonotakashi 0:8fdf9a60065b 33
kadonotakashi 0:8fdf9a60065b 34 namespace rtos {
kadonotakashi 0:8fdf9a60065b 35 /** \addtogroup rtos */
kadonotakashi 0:8fdf9a60065b 36 /** @{*/
kadonotakashi 0:8fdf9a60065b 37
kadonotakashi 0:8fdf9a60065b 38 class Mutex;
kadonotakashi 0:8fdf9a60065b 39 /** Typedef for the mutex lock
kadonotakashi 0:8fdf9a60065b 40 *
kadonotakashi 0:8fdf9a60065b 41 * Usage:
kadonotakashi 0:8fdf9a60065b 42 * @code
kadonotakashi 0:8fdf9a60065b 43 * void foo(Mutex &m) {
kadonotakashi 0:8fdf9a60065b 44 * ScopedMutexLock lock(m);
kadonotakashi 0:8fdf9a60065b 45 * // Mutex lock protects code in this block
kadonotakashi 0:8fdf9a60065b 46 * }
kadonotakashi 0:8fdf9a60065b 47 * @endcode
kadonotakashi 0:8fdf9a60065b 48 */
kadonotakashi 0:8fdf9a60065b 49 typedef mbed::ScopedLock<Mutex> ScopedMutexLock;
kadonotakashi 0:8fdf9a60065b 50
kadonotakashi 0:8fdf9a60065b 51 /**
kadonotakashi 0:8fdf9a60065b 52 * \defgroup rtos_Mutex Mutex class
kadonotakashi 0:8fdf9a60065b 53 * @{
kadonotakashi 0:8fdf9a60065b 54 */
kadonotakashi 0:8fdf9a60065b 55
kadonotakashi 0:8fdf9a60065b 56 /** The Mutex class is used to synchronize the execution of threads.
kadonotakashi 0:8fdf9a60065b 57 This is for example used to protect access to a shared resource.
kadonotakashi 0:8fdf9a60065b 58
kadonotakashi 0:8fdf9a60065b 59 @note You cannot use member functions of this class in ISR context. If you require Mutex functionality within
kadonotakashi 0:8fdf9a60065b 60 ISR handler, consider using @a Semaphore.
kadonotakashi 0:8fdf9a60065b 61
kadonotakashi 0:8fdf9a60065b 62 @note
kadonotakashi 0:8fdf9a60065b 63 Memory considerations: The mutex control structures will be created on current thread's stack, both for the Mbed OS
kadonotakashi 0:8fdf9a60065b 64 and underlying RTOS objects (static or dynamic RTOS memory pools are not being used).
kadonotakashi 0:8fdf9a60065b 65 */
kadonotakashi 0:8fdf9a60065b 66 class Mutex : private mbed::NonCopyable<Mutex> {
kadonotakashi 0:8fdf9a60065b 67 public:
kadonotakashi 0:8fdf9a60065b 68 /** Create and Initialize a Mutex object
kadonotakashi 0:8fdf9a60065b 69 *
kadonotakashi 0:8fdf9a60065b 70 * @note You cannot call this function from ISR context.
kadonotakashi 0:8fdf9a60065b 71 */
kadonotakashi 0:8fdf9a60065b 72 Mutex();
kadonotakashi 0:8fdf9a60065b 73
kadonotakashi 0:8fdf9a60065b 74 /** Create and Initialize a Mutex object
kadonotakashi 0:8fdf9a60065b 75
kadonotakashi 0:8fdf9a60065b 76 @param name name to be used for this mutex. It has to stay allocated for the lifetime of the thread.
kadonotakashi 0:8fdf9a60065b 77 @note You cannot call this function from ISR context.
kadonotakashi 0:8fdf9a60065b 78 */
kadonotakashi 0:8fdf9a60065b 79 Mutex(const char *name);
kadonotakashi 0:8fdf9a60065b 80
kadonotakashi 0:8fdf9a60065b 81 /**
kadonotakashi 0:8fdf9a60065b 82 Wait until a Mutex becomes available.
kadonotakashi 0:8fdf9a60065b 83
kadonotakashi 0:8fdf9a60065b 84 @return status code that indicates the execution status of the function:
kadonotakashi 0:8fdf9a60065b 85 @a osOK the mutex has been obtained.
kadonotakashi 0:8fdf9a60065b 86
kadonotakashi 0:8fdf9a60065b 87 @note You cannot call this function from ISR context.
kadonotakashi 0:8fdf9a60065b 88 @note This function treats RTOS errors as fatal system errors, so can only return osOK.
kadonotakashi 0:8fdf9a60065b 89 Use of the return value is deprecated, as the return is expected to become void in the future.
kadonotakashi 0:8fdf9a60065b 90 */
kadonotakashi 0:8fdf9a60065b 91 osStatus lock(void);
kadonotakashi 0:8fdf9a60065b 92
kadonotakashi 0:8fdf9a60065b 93 /**
kadonotakashi 0:8fdf9a60065b 94 For backwards compatibility.
kadonotakashi 0:8fdf9a60065b 95 @deprecated Do not use this function. This function has been replaced with lock(), trylock() and trylock_for() functions.
kadonotakashi 0:8fdf9a60065b 96
kadonotakashi 0:8fdf9a60065b 97 Wait until a Mutex becomes available.
kadonotakashi 0:8fdf9a60065b 98 @param millisec timeout value or 0 in case of no time-out.
kadonotakashi 0:8fdf9a60065b 99 @return status code that indicates the execution status of the function:
kadonotakashi 0:8fdf9a60065b 100 @a osOK the mutex has been obtained.
kadonotakashi 0:8fdf9a60065b 101 @a osErrorTimeout the mutex could not be obtained in the given time.
kadonotakashi 0:8fdf9a60065b 102 @a osErrorResource the mutex could not be obtained when no timeout was specified.
kadonotakashi 0:8fdf9a60065b 103
kadonotakashi 0:8fdf9a60065b 104 @note You cannot call this function from ISR context.
kadonotakashi 0:8fdf9a60065b 105 @note This function treats RTOS errors as fatal system errors, so can only return osOK or
kadonotakashi 0:8fdf9a60065b 106 osErrorResource in case when millisec is 0 or osErrorTimeout if millisec is not osWaitForever.
kadonotakashi 0:8fdf9a60065b 107 */
kadonotakashi 0:8fdf9a60065b 108 MBED_DEPRECATED_SINCE("mbed-os-5.10.0", "Replaced with lock(), trylock() and trylock_for() functions")
kadonotakashi 0:8fdf9a60065b 109 osStatus lock(uint32_t millisec);
kadonotakashi 0:8fdf9a60065b 110
kadonotakashi 0:8fdf9a60065b 111 /** Try to lock the mutex, and return immediately
kadonotakashi 0:8fdf9a60065b 112 @return true if the mutex was acquired, false otherwise.
kadonotakashi 0:8fdf9a60065b 113 @note equivalent to trylock_for(0)
kadonotakashi 0:8fdf9a60065b 114
kadonotakashi 0:8fdf9a60065b 115 @note You cannot call this function from ISR context.
kadonotakashi 0:8fdf9a60065b 116 */
kadonotakashi 0:8fdf9a60065b 117 bool trylock();
kadonotakashi 0:8fdf9a60065b 118
kadonotakashi 0:8fdf9a60065b 119 /** Try to lock the mutex for a specified time
kadonotakashi 0:8fdf9a60065b 120 @param millisec timeout value or 0 in case of no time-out.
kadonotakashi 0:8fdf9a60065b 121 @return true if the mutex was acquired, false otherwise.
kadonotakashi 0:8fdf9a60065b 122 @note the underlying RTOS may have a limit to the maximum wait time
kadonotakashi 0:8fdf9a60065b 123 due to internal 32-bit computations, but this is guaranteed to work if the
kadonotakashi 0:8fdf9a60065b 124 wait is <= 0x7fffffff milliseconds (~24 days). If the limit is exceeded,
kadonotakashi 0:8fdf9a60065b 125 the lock attempt will time out earlier than specified.
kadonotakashi 0:8fdf9a60065b 126
kadonotakashi 0:8fdf9a60065b 127 @note You cannot call this function from ISR context.
kadonotakashi 0:8fdf9a60065b 128 */
kadonotakashi 0:8fdf9a60065b 129 bool trylock_for(uint32_t millisec);
kadonotakashi 0:8fdf9a60065b 130
kadonotakashi 0:8fdf9a60065b 131 /** Try to lock the mutex until specified time
kadonotakashi 0:8fdf9a60065b 132 @param millisec absolute timeout time, referenced to Kernel::get_ms_count()
kadonotakashi 0:8fdf9a60065b 133 @return true if the mutex was acquired, false otherwise.
kadonotakashi 0:8fdf9a60065b 134 @note the underlying RTOS may have a limit to the maximum wait time
kadonotakashi 0:8fdf9a60065b 135 due to internal 32-bit computations, but this is guaranteed to work if the
kadonotakashi 0:8fdf9a60065b 136 wait is <= 0x7fffffff milliseconds (~24 days). If the limit is exceeded,
kadonotakashi 0:8fdf9a60065b 137 the lock attempt will time out earlier than specified.
kadonotakashi 0:8fdf9a60065b 138
kadonotakashi 0:8fdf9a60065b 139 @note You cannot call this function from ISR context.
kadonotakashi 0:8fdf9a60065b 140 */
kadonotakashi 0:8fdf9a60065b 141 bool trylock_until(uint64_t millisec);
kadonotakashi 0:8fdf9a60065b 142
kadonotakashi 0:8fdf9a60065b 143 /**
kadonotakashi 0:8fdf9a60065b 144 Unlock the mutex that has previously been locked by the same thread
kadonotakashi 0:8fdf9a60065b 145
kadonotakashi 0:8fdf9a60065b 146 @return status code that indicates the execution status of the function:
kadonotakashi 0:8fdf9a60065b 147 @a osOK the mutex has been released.
kadonotakashi 0:8fdf9a60065b 148
kadonotakashi 0:8fdf9a60065b 149 @note You cannot call this function from ISR context.
kadonotakashi 0:8fdf9a60065b 150 @note This function treats RTOS errors as fatal system errors, so can only return osOK.
kadonotakashi 0:8fdf9a60065b 151 Use of the return value is deprecated, as the return is expected to become void in the future.
kadonotakashi 0:8fdf9a60065b 152 */
kadonotakashi 0:8fdf9a60065b 153 osStatus unlock();
kadonotakashi 0:8fdf9a60065b 154
kadonotakashi 0:8fdf9a60065b 155 /** Get the owner the this mutex
kadonotakashi 0:8fdf9a60065b 156 @return the current owner of this mutex.
kadonotakashi 0:8fdf9a60065b 157
kadonotakashi 0:8fdf9a60065b 158 @note You cannot call this function from ISR context.
kadonotakashi 0:8fdf9a60065b 159 */
kadonotakashi 0:8fdf9a60065b 160 osThreadId get_owner();
kadonotakashi 0:8fdf9a60065b 161
kadonotakashi 0:8fdf9a60065b 162 /** Mutex destructor
kadonotakashi 0:8fdf9a60065b 163 *
kadonotakashi 0:8fdf9a60065b 164 * @note You cannot call this function from ISR context.
kadonotakashi 0:8fdf9a60065b 165 */
kadonotakashi 0:8fdf9a60065b 166 ~Mutex();
kadonotakashi 0:8fdf9a60065b 167
kadonotakashi 0:8fdf9a60065b 168 private:
kadonotakashi 0:8fdf9a60065b 169 void constructor(const char *name = NULL);
kadonotakashi 0:8fdf9a60065b 170 friend class ConditionVariable;
kadonotakashi 0:8fdf9a60065b 171
kadonotakashi 0:8fdf9a60065b 172 osMutexId_t _id;
kadonotakashi 0:8fdf9a60065b 173 mbed_rtos_storage_mutex_t _obj_mem;
kadonotakashi 0:8fdf9a60065b 174 uint32_t _count;
kadonotakashi 0:8fdf9a60065b 175 };
kadonotakashi 0:8fdf9a60065b 176 /** @}*/
kadonotakashi 0:8fdf9a60065b 177 /** @}*/
kadonotakashi 0:8fdf9a60065b 178 }
kadonotakashi 0:8fdf9a60065b 179 #endif
kadonotakashi 0:8fdf9a60065b 180
kadonotakashi 0:8fdf9a60065b 181