The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.
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mbed 2
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platform/SingletonPtr.h@138:093f2bd7b9eb, 2017-03-14 (annotated)
- Committer:
- <>
- Date:
- Tue Mar 14 16:20:51 2017 +0000
- Revision:
- 138:093f2bd7b9eb
- Parent:
- 128:9bcdf88f62b0
- Child:
- 145:64910690c574
Release 138 of the mbed library
Ports for Upcoming Targets
Fixes and Changes
3716: fix for issue #3715: correction in startup files for ARM and IAR, alignment of system_stm32f429xx.c files https://github.com/ARMmbed/mbed-os/pull/3716
3741: STM32 remove warning in hal_tick_32b.c file https://github.com/ARMmbed/mbed-os/pull/3741
3780: STM32L4 : Fix GPIO G port compatibility https://github.com/ARMmbed/mbed-os/pull/3780
3831: NCS36510: SPISLAVE enabled (Conflict resolved) https://github.com/ARMmbed/mbed-os/pull/3831
3836: Allow to redefine nRF's PSTORAGE_NUM_OF_PAGES outside of the mbed-os https://github.com/ARMmbed/mbed-os/pull/3836
3840: STM32: gpio SPEED - always set High Speed by default https://github.com/ARMmbed/mbed-os/pull/3840
3844: STM32 GPIO: Typo correction. Update comment (GPIO_IP_WITHOUT_BRR) https://github.com/ARMmbed/mbed-os/pull/3844
3850: STM32: change spi error to debug warning https://github.com/ARMmbed/mbed-os/pull/3850
3860: Define GPIO_IP_WITHOUT_BRR for xDot platform https://github.com/ARMmbed/mbed-os/pull/3860
3880: DISCO_F469NI: allow the use of CAN2 instance when CAN1 is not activated https://github.com/ARMmbed/mbed-os/pull/3880
3795: Fix pwm period calc https://github.com/ARMmbed/mbed-os/pull/3795
3828: STM32 CAN API: correct format and type https://github.com/ARMmbed/mbed-os/pull/3828
3842: TARGET_NRF: corrected spi_init() to properly handle re-initialization https://github.com/ARMmbed/mbed-os/pull/3842
3843: STM32L476xG: set APB2 clock to 80MHz (instead of 40MHz) https://github.com/ARMmbed/mbed-os/pull/3843
3879: NUCLEO_F446ZE: Add missing AnalogIn pins on PF_3, PF_5 and PF_10. https://github.com/ARMmbed/mbed-os/pull/3879
3902: Fix heap and stack size for NUCLEO_F746ZG https://github.com/ARMmbed/mbed-os/pull/3902
3829: can_write(): return error code when no tx mailboxes are available https://github.com/ARMmbed/mbed-os/pull/3829
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
<> | 128:9bcdf88f62b0 | 1 | |
<> | 128:9bcdf88f62b0 | 2 | /** \addtogroup platform */ |
<> | 128:9bcdf88f62b0 | 3 | /** @{*/ |
<> | 128:9bcdf88f62b0 | 4 | /* mbed Microcontroller Library |
<> | 128:9bcdf88f62b0 | 5 | * Copyright (c) 2006-2013 ARM Limited |
<> | 128:9bcdf88f62b0 | 6 | * |
<> | 128:9bcdf88f62b0 | 7 | * Licensed under the Apache License, Version 2.0 (the "License"); |
<> | 128:9bcdf88f62b0 | 8 | * you may not use this file except in compliance with the License. |
<> | 128:9bcdf88f62b0 | 9 | * You may obtain a copy of the License at |
<> | 128:9bcdf88f62b0 | 10 | * |
<> | 128:9bcdf88f62b0 | 11 | * http://www.apache.org/licenses/LICENSE-2.0 |
<> | 128:9bcdf88f62b0 | 12 | * |
<> | 128:9bcdf88f62b0 | 13 | * Unless required by applicable law or agreed to in writing, software |
<> | 128:9bcdf88f62b0 | 14 | * distributed under the License is distributed on an "AS IS" BASIS, |
<> | 128:9bcdf88f62b0 | 15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
<> | 128:9bcdf88f62b0 | 16 | * See the License for the specific language governing permissions and |
<> | 128:9bcdf88f62b0 | 17 | * limitations under the License. |
<> | 128:9bcdf88f62b0 | 18 | */ |
<> | 128:9bcdf88f62b0 | 19 | #ifndef SINGLETONPTR_H |
<> | 128:9bcdf88f62b0 | 20 | #define SINGLETONPTR_H |
<> | 128:9bcdf88f62b0 | 21 | |
<> | 128:9bcdf88f62b0 | 22 | #include <stdint.h> |
<> | 128:9bcdf88f62b0 | 23 | #include <new> |
<> | 128:9bcdf88f62b0 | 24 | #include "platform/mbed_assert.h" |
<> | 128:9bcdf88f62b0 | 25 | #ifdef MBED_CONF_RTOS_PRESENT |
<> | 128:9bcdf88f62b0 | 26 | #include "cmsis_os.h" |
<> | 128:9bcdf88f62b0 | 27 | #endif |
<> | 128:9bcdf88f62b0 | 28 | |
<> | 128:9bcdf88f62b0 | 29 | #ifdef MBED_CONF_RTOS_PRESENT |
<> | 128:9bcdf88f62b0 | 30 | extern osMutexId singleton_mutex_id; |
<> | 128:9bcdf88f62b0 | 31 | #endif |
<> | 128:9bcdf88f62b0 | 32 | |
<> | 128:9bcdf88f62b0 | 33 | /** Lock the singleton mutex |
<> | 128:9bcdf88f62b0 | 34 | * |
<> | 128:9bcdf88f62b0 | 35 | * This function is typically used to provide |
<> | 128:9bcdf88f62b0 | 36 | * exclusive access when initializing a |
<> | 128:9bcdf88f62b0 | 37 | * global object. |
<> | 128:9bcdf88f62b0 | 38 | */ |
<> | 128:9bcdf88f62b0 | 39 | inline static void singleton_lock(void) |
<> | 128:9bcdf88f62b0 | 40 | { |
<> | 128:9bcdf88f62b0 | 41 | #ifdef MBED_CONF_RTOS_PRESENT |
<> | 128:9bcdf88f62b0 | 42 | osMutexWait(singleton_mutex_id, osWaitForever); |
<> | 128:9bcdf88f62b0 | 43 | #endif |
<> | 128:9bcdf88f62b0 | 44 | } |
<> | 128:9bcdf88f62b0 | 45 | |
<> | 128:9bcdf88f62b0 | 46 | /** Unlock the singleton mutex |
<> | 128:9bcdf88f62b0 | 47 | * |
<> | 128:9bcdf88f62b0 | 48 | * This function is typically used to provide |
<> | 128:9bcdf88f62b0 | 49 | * exclusive access when initializing a |
<> | 128:9bcdf88f62b0 | 50 | * global object. |
<> | 128:9bcdf88f62b0 | 51 | */ |
<> | 128:9bcdf88f62b0 | 52 | inline static void singleton_unlock(void) |
<> | 128:9bcdf88f62b0 | 53 | { |
<> | 128:9bcdf88f62b0 | 54 | #ifdef MBED_CONF_RTOS_PRESENT |
<> | 128:9bcdf88f62b0 | 55 | osMutexRelease (singleton_mutex_id); |
<> | 128:9bcdf88f62b0 | 56 | #endif |
<> | 128:9bcdf88f62b0 | 57 | } |
<> | 128:9bcdf88f62b0 | 58 | |
<> | 128:9bcdf88f62b0 | 59 | /** Utility class for creating an using a singleton |
<> | 128:9bcdf88f62b0 | 60 | * |
<> | 128:9bcdf88f62b0 | 61 | * @Note Synchronization level: Thread safe |
<> | 128:9bcdf88f62b0 | 62 | * |
<> | 128:9bcdf88f62b0 | 63 | * @Note: This class must only be used in a static context - |
<> | 128:9bcdf88f62b0 | 64 | * this class must never be allocated or created on the |
<> | 128:9bcdf88f62b0 | 65 | * stack. |
<> | 128:9bcdf88f62b0 | 66 | * |
<> | 128:9bcdf88f62b0 | 67 | * @Note: This class is lazily initialized on first use. |
<> | 128:9bcdf88f62b0 | 68 | * This class is a POD type so if it is not used it will |
<> | 128:9bcdf88f62b0 | 69 | * be garbage collected. |
<> | 128:9bcdf88f62b0 | 70 | */ |
<> | 128:9bcdf88f62b0 | 71 | template <class T> |
<> | 128:9bcdf88f62b0 | 72 | struct SingletonPtr { |
<> | 128:9bcdf88f62b0 | 73 | |
<> | 128:9bcdf88f62b0 | 74 | /** Get a pointer to the underlying singleton |
<> | 128:9bcdf88f62b0 | 75 | * |
<> | 128:9bcdf88f62b0 | 76 | * @returns |
<> | 128:9bcdf88f62b0 | 77 | * A pointer to the singleton |
<> | 128:9bcdf88f62b0 | 78 | */ |
<> | 128:9bcdf88f62b0 | 79 | T* get() { |
<> | 128:9bcdf88f62b0 | 80 | if (NULL == _ptr) { |
<> | 128:9bcdf88f62b0 | 81 | singleton_lock(); |
<> | 128:9bcdf88f62b0 | 82 | if (NULL == _ptr) { |
<> | 128:9bcdf88f62b0 | 83 | _ptr = new (_data) T(); |
<> | 128:9bcdf88f62b0 | 84 | } |
<> | 128:9bcdf88f62b0 | 85 | singleton_unlock(); |
<> | 128:9bcdf88f62b0 | 86 | } |
<> | 128:9bcdf88f62b0 | 87 | // _ptr was not zero initialized or was |
<> | 128:9bcdf88f62b0 | 88 | // corrupted if this assert is hit |
<> | 128:9bcdf88f62b0 | 89 | MBED_ASSERT(_ptr == (T *)&_data); |
<> | 128:9bcdf88f62b0 | 90 | return _ptr; |
<> | 128:9bcdf88f62b0 | 91 | } |
<> | 128:9bcdf88f62b0 | 92 | |
<> | 128:9bcdf88f62b0 | 93 | /** Get a pointer to the underlying singleton |
<> | 128:9bcdf88f62b0 | 94 | * |
<> | 128:9bcdf88f62b0 | 95 | * @returns |
<> | 128:9bcdf88f62b0 | 96 | * A pointer to the singleton |
<> | 128:9bcdf88f62b0 | 97 | */ |
<> | 128:9bcdf88f62b0 | 98 | T* operator->() { |
<> | 128:9bcdf88f62b0 | 99 | return get(); |
<> | 128:9bcdf88f62b0 | 100 | } |
<> | 128:9bcdf88f62b0 | 101 | |
<> | 128:9bcdf88f62b0 | 102 | // This is zero initialized when in global scope |
<> | 128:9bcdf88f62b0 | 103 | T *_ptr; |
<> | 128:9bcdf88f62b0 | 104 | // Force data to be 4 byte aligned |
<> | 128:9bcdf88f62b0 | 105 | uint32_t _data[(sizeof(T) + sizeof(uint32_t) - 1) / sizeof(uint32_t)]; |
<> | 128:9bcdf88f62b0 | 106 | }; |
<> | 128:9bcdf88f62b0 | 107 | |
<> | 128:9bcdf88f62b0 | 108 | #endif |
<> | 128:9bcdf88f62b0 | 109 | |
<> | 128:9bcdf88f62b0 | 110 | /** @}*/ |