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rtos/ThisThread.cpp@2:7aab896b1a3b, 2019-03-13 (annotated)
- Committer:
- kevman
- Date:
- Wed Mar 13 11:03:24 2019 +0000
- Revision:
- 2:7aab896b1a3b
- Parent:
- 0:38ceb79fef03
2019-03-13
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
kevman | 0:38ceb79fef03 | 1 | /* mbed Microcontroller Library |
kevman | 0:38ceb79fef03 | 2 | * Copyright (c) 2006-2012 ARM Limited |
kevman | 0:38ceb79fef03 | 3 | * |
kevman | 0:38ceb79fef03 | 4 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
kevman | 0:38ceb79fef03 | 5 | * of this software and associated documentation files (the "Software"), to deal |
kevman | 0:38ceb79fef03 | 6 | * in the Software without restriction, including without limitation the rights |
kevman | 0:38ceb79fef03 | 7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
kevman | 0:38ceb79fef03 | 8 | * copies of the Software, and to permit persons to whom the Software is |
kevman | 0:38ceb79fef03 | 9 | * furnished to do so, subject to the following conditions: |
kevman | 0:38ceb79fef03 | 10 | * |
kevman | 0:38ceb79fef03 | 11 | * The above copyright notice and this permission notice shall be included in |
kevman | 0:38ceb79fef03 | 12 | * all copies or substantial portions of the Software. |
kevman | 0:38ceb79fef03 | 13 | * |
kevman | 0:38ceb79fef03 | 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
kevman | 0:38ceb79fef03 | 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
kevman | 0:38ceb79fef03 | 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
kevman | 0:38ceb79fef03 | 17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
kevman | 0:38ceb79fef03 | 18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
kevman | 0:38ceb79fef03 | 19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
kevman | 0:38ceb79fef03 | 20 | * SOFTWARE. |
kevman | 0:38ceb79fef03 | 21 | */ |
kevman | 0:38ceb79fef03 | 22 | |
kevman | 0:38ceb79fef03 | 23 | #define __STDC_LIMIT_MACROS |
kevman | 0:38ceb79fef03 | 24 | #include "rtos/ThisThread.h" |
kevman | 0:38ceb79fef03 | 25 | |
kevman | 0:38ceb79fef03 | 26 | #include "mbed.h" |
kevman | 0:38ceb79fef03 | 27 | #include "rtos/rtos_idle.h" |
kevman | 0:38ceb79fef03 | 28 | #include "mbed_assert.h" |
kevman | 0:38ceb79fef03 | 29 | |
kevman | 0:38ceb79fef03 | 30 | namespace rtos { |
kevman | 0:38ceb79fef03 | 31 | |
kevman | 0:38ceb79fef03 | 32 | uint32_t ThisThread::flags_clear(uint32_t flags) |
kevman | 0:38ceb79fef03 | 33 | { |
kevman | 0:38ceb79fef03 | 34 | flags = osThreadFlagsClear(flags); |
kevman | 0:38ceb79fef03 | 35 | MBED_ASSERT(!(flags & osFlagsError)); |
kevman | 0:38ceb79fef03 | 36 | return flags; |
kevman | 0:38ceb79fef03 | 37 | } |
kevman | 0:38ceb79fef03 | 38 | |
kevman | 0:38ceb79fef03 | 39 | uint32_t ThisThread::flags_get() |
kevman | 0:38ceb79fef03 | 40 | { |
kevman | 0:38ceb79fef03 | 41 | return osThreadFlagsGet(); |
kevman | 0:38ceb79fef03 | 42 | } |
kevman | 0:38ceb79fef03 | 43 | |
kevman | 0:38ceb79fef03 | 44 | static uint32_t flags_wait_for(uint32_t flags, uint32_t millisec, bool clear, uint32_t options) |
kevman | 0:38ceb79fef03 | 45 | { |
kevman | 0:38ceb79fef03 | 46 | if (!clear) { |
kevman | 0:38ceb79fef03 | 47 | options |= osFlagsNoClear; |
kevman | 0:38ceb79fef03 | 48 | } |
kevman | 0:38ceb79fef03 | 49 | flags = osThreadFlagsWait(flags, options, millisec); |
kevman | 0:38ceb79fef03 | 50 | if (flags & osFlagsError) { |
kevman | 0:38ceb79fef03 | 51 | MBED_ASSERT((flags == osFlagsErrorTimeout && millisec != osWaitForever) || |
kevman | 0:38ceb79fef03 | 52 | (flags == osFlagsErrorResource && millisec == 0)); |
kevman | 0:38ceb79fef03 | 53 | flags = ThisThread::flags_get(); |
kevman | 0:38ceb79fef03 | 54 | } |
kevman | 0:38ceb79fef03 | 55 | |
kevman | 0:38ceb79fef03 | 56 | return flags; |
kevman | 0:38ceb79fef03 | 57 | } |
kevman | 0:38ceb79fef03 | 58 | |
kevman | 0:38ceb79fef03 | 59 | static uint32_t flags_wait_until(uint32_t flags, uint64_t millisec, bool clear, uint32_t options) |
kevman | 0:38ceb79fef03 | 60 | { |
kevman | 0:38ceb79fef03 | 61 | uint64_t now = Kernel::get_ms_count(); |
kevman | 0:38ceb79fef03 | 62 | |
kevman | 0:38ceb79fef03 | 63 | uint32_t delay; |
kevman | 0:38ceb79fef03 | 64 | if (now >= millisec) { |
kevman | 0:38ceb79fef03 | 65 | delay = 0; |
kevman | 0:38ceb79fef03 | 66 | } else if (millisec - now >= osWaitForever) { |
kevman | 0:38ceb79fef03 | 67 | // Documentation permits early return for big offsets |
kevman | 0:38ceb79fef03 | 68 | delay = osWaitForever - 1; |
kevman | 0:38ceb79fef03 | 69 | } else { |
kevman | 0:38ceb79fef03 | 70 | delay = millisec - now; |
kevman | 0:38ceb79fef03 | 71 | } |
kevman | 0:38ceb79fef03 | 72 | return flags_wait_for(flags, delay, clear, options); |
kevman | 0:38ceb79fef03 | 73 | } |
kevman | 0:38ceb79fef03 | 74 | |
kevman | 0:38ceb79fef03 | 75 | uint32_t ThisThread::flags_wait_all(uint32_t flags, bool clear) |
kevman | 0:38ceb79fef03 | 76 | { |
kevman | 0:38ceb79fef03 | 77 | return flags_wait_for(flags, osWaitForever, clear, osFlagsWaitAll); |
kevman | 0:38ceb79fef03 | 78 | } |
kevman | 0:38ceb79fef03 | 79 | |
kevman | 0:38ceb79fef03 | 80 | uint32_t ThisThread::flags_wait_all_for(uint32_t flags, uint32_t millisec, bool clear) |
kevman | 0:38ceb79fef03 | 81 | { |
kevman | 0:38ceb79fef03 | 82 | return flags_wait_for(flags, millisec, clear, osFlagsWaitAll); |
kevman | 0:38ceb79fef03 | 83 | } |
kevman | 0:38ceb79fef03 | 84 | |
kevman | 0:38ceb79fef03 | 85 | uint32_t ThisThread::flags_wait_all_until(uint32_t flags, uint64_t millisec, bool clear) |
kevman | 0:38ceb79fef03 | 86 | { |
kevman | 0:38ceb79fef03 | 87 | return flags_wait_until(flags, millisec, clear, osFlagsWaitAll); |
kevman | 0:38ceb79fef03 | 88 | } |
kevman | 0:38ceb79fef03 | 89 | |
kevman | 0:38ceb79fef03 | 90 | uint32_t ThisThread::flags_wait_any(uint32_t flags, bool clear) |
kevman | 0:38ceb79fef03 | 91 | { |
kevman | 0:38ceb79fef03 | 92 | return flags_wait_for(flags, osWaitForever, clear, osFlagsWaitAny); |
kevman | 0:38ceb79fef03 | 93 | } |
kevman | 0:38ceb79fef03 | 94 | |
kevman | 0:38ceb79fef03 | 95 | uint32_t ThisThread::flags_wait_any_for(uint32_t flags, uint32_t millisec, bool clear) |
kevman | 0:38ceb79fef03 | 96 | { |
kevman | 0:38ceb79fef03 | 97 | return flags_wait_for(flags, millisec, clear, osFlagsWaitAny); |
kevman | 0:38ceb79fef03 | 98 | } |
kevman | 0:38ceb79fef03 | 99 | |
kevman | 0:38ceb79fef03 | 100 | uint32_t ThisThread::flags_wait_any_until(uint32_t flags, uint64_t millisec, bool clear) |
kevman | 0:38ceb79fef03 | 101 | { |
kevman | 0:38ceb79fef03 | 102 | return flags_wait_until(flags, millisec, clear, osFlagsWaitAny); |
kevman | 0:38ceb79fef03 | 103 | } |
kevman | 0:38ceb79fef03 | 104 | |
kevman | 0:38ceb79fef03 | 105 | void ThisThread::sleep_for(uint32_t millisec) |
kevman | 0:38ceb79fef03 | 106 | { |
kevman | 0:38ceb79fef03 | 107 | osStatus_t status = osDelay(millisec); |
kevman | 0:38ceb79fef03 | 108 | MBED_ASSERT(status == osOK); |
kevman | 0:38ceb79fef03 | 109 | } |
kevman | 0:38ceb79fef03 | 110 | |
kevman | 0:38ceb79fef03 | 111 | void ThisThread::sleep_until(uint64_t millisec) |
kevman | 0:38ceb79fef03 | 112 | { |
kevman | 0:38ceb79fef03 | 113 | // CMSIS-RTOS 2.1.0 had 64-bit time and osDelayUntil, but that's been revoked. |
kevman | 0:38ceb79fef03 | 114 | // Limit ourselves to manual implementation assuming a >=32-bit osDelay. |
kevman | 0:38ceb79fef03 | 115 | |
kevman | 0:38ceb79fef03 | 116 | // 64-bit time doesn't wrap (for half a billion years, at last) |
kevman | 0:38ceb79fef03 | 117 | // make the effort to loop for unlimited sleep, as it doesn't cost much |
kevman | 0:38ceb79fef03 | 118 | uint64_t now; |
kevman | 0:38ceb79fef03 | 119 | |
kevman | 0:38ceb79fef03 | 120 | while ((now = Kernel::get_ms_count()) < millisec) { |
kevman | 0:38ceb79fef03 | 121 | if (millisec - now > UINT32_MAX) { |
kevman | 0:38ceb79fef03 | 122 | sleep_for(UINT32_MAX); |
kevman | 0:38ceb79fef03 | 123 | continue; |
kevman | 0:38ceb79fef03 | 124 | } else { |
kevman | 0:38ceb79fef03 | 125 | sleep_for(millisec - now); |
kevman | 0:38ceb79fef03 | 126 | break; |
kevman | 0:38ceb79fef03 | 127 | } |
kevman | 0:38ceb79fef03 | 128 | } |
kevman | 0:38ceb79fef03 | 129 | } |
kevman | 0:38ceb79fef03 | 130 | |
kevman | 0:38ceb79fef03 | 131 | void ThisThread::yield() |
kevman | 0:38ceb79fef03 | 132 | { |
kevman | 0:38ceb79fef03 | 133 | osThreadYield(); |
kevman | 0:38ceb79fef03 | 134 | } |
kevman | 0:38ceb79fef03 | 135 | |
kevman | 0:38ceb79fef03 | 136 | osThreadId_t ThisThread::get_id() |
kevman | 0:38ceb79fef03 | 137 | { |
kevman | 0:38ceb79fef03 | 138 | return osThreadGetId(); |
kevman | 0:38ceb79fef03 | 139 | } |
kevman | 0:38ceb79fef03 | 140 | |
kevman | 0:38ceb79fef03 | 141 | } |