Clone of mbed rtos 2 for easy accessibility.
Fork of mbed-rtos by
rtos/Semaphore.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?
User | Revision | Line number | New contents of line |
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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 | 8:88a1a9c26ae3 | 22 | #ifndef SEMAPHORE_H |
emilmont | 8:88a1a9c26ae3 | 23 | #define SEMAPHORE_H |
emilmont | 8:88a1a9c26ae3 | 24 | |
emilmont | 8:88a1a9c26ae3 | 25 | #include <stdint.h> |
emilmont | 8:88a1a9c26ae3 | 26 | #include "cmsis_os.h" |
emilmont | 8:88a1a9c26ae3 | 27 | |
emilmont | 8:88a1a9c26ae3 | 28 | namespace rtos { |
emilmont | 8:88a1a9c26ae3 | 29 | |
emilmont | 8:88a1a9c26ae3 | 30 | /** The Semaphore class is used to manage and protect access to a set of shared resources. */ |
emilmont | 8:88a1a9c26ae3 | 31 | class Semaphore { |
emilmont | 8:88a1a9c26ae3 | 32 | public: |
emilmont | 8:88a1a9c26ae3 | 33 | /** Create and Initialize a Semaphore object used for managing resources. |
emilmont | 8:88a1a9c26ae3 | 34 | @param number of available resources; maximum index value is (count-1). |
emilmont | 8:88a1a9c26ae3 | 35 | */ |
emilmont | 8:88a1a9c26ae3 | 36 | Semaphore(int32_t count); |
emilmont | 8:88a1a9c26ae3 | 37 | |
emilmont | 8:88a1a9c26ae3 | 38 | /** Wait until a Semaphore resource becomes available. |
emilmont | 8:88a1a9c26ae3 | 39 | @param millisec timeout value or 0 in case of no time-out. (default: osWaitForever). |
emilmont | 8:88a1a9c26ae3 | 40 | @return number of available tokens, or -1 in case of incorrect parameters |
emilmont | 8:88a1a9c26ae3 | 41 | */ |
emilmont | 8:88a1a9c26ae3 | 42 | int32_t wait(uint32_t millisec=osWaitForever); |
emilmont | 8:88a1a9c26ae3 | 43 | |
emilmont | 8:88a1a9c26ae3 | 44 | /** Release a Semaphore resource that was obtain with Semaphore::wait. |
emilmont | 8:88a1a9c26ae3 | 45 | @return status code that indicates the execution status of the function. |
emilmont | 8:88a1a9c26ae3 | 46 | */ |
emilmont | 8:88a1a9c26ae3 | 47 | osStatus release(void); |
emilmont | 8:88a1a9c26ae3 | 48 | |
emilmont | 8:88a1a9c26ae3 | 49 | ~Semaphore(); |
emilmont | 8:88a1a9c26ae3 | 50 | |
emilmont | 8:88a1a9c26ae3 | 51 | private: |
emilmont | 8:88a1a9c26ae3 | 52 | osSemaphoreId _osSemaphoreId; |
emilmont | 8:88a1a9c26ae3 | 53 | osSemaphoreDef_t _osSemaphoreDef; |
emilmont | 8:88a1a9c26ae3 | 54 | #ifdef CMSIS_OS_RTX |
emilmont | 8:88a1a9c26ae3 | 55 | uint32_t _semaphore_data[2]; |
emilmont | 8:88a1a9c26ae3 | 56 | #endif |
emilmont | 8:88a1a9c26ae3 | 57 | }; |
emilmont | 8:88a1a9c26ae3 | 58 | |
emilmont | 8:88a1a9c26ae3 | 59 | } |
emilmont | 8:88a1a9c26ae3 | 60 | #endif |