| ??? 04/21/07 08:53 Read: times Msg Score: +2 +1 Good Answer/Helpful +1 Informative |
#137695 - Classic atomic problem Responding to: ???'s previous message |
For some reason people only associate atomic operations with multibyte variables. Andy presents a classic case of atomicity in regards to a semaphore, the other case is testing then writing or reading a variable be it a single byte or multibyte var. Anything shared between ISRs and/or tasks in a pre-emptive system need to be handled carefully. |
| Topic | Author | Date |
| lesson learned | 01/01/70 00:00 | |
| "atomic" | 01/01/70 00:00 | |
| atomicity | 01/01/70 00:00 | |
| if thatb is so | 01/01/70 00:00 | |
| Indeed | 01/01/70 00:00 | |
| Bit test and clear | 01/01/70 00:00 | |
| JBC | 01/01/70 00:00 | |
| favourite atomic test-and-set instructions | 01/01/70 00:00 | |
| SDCC also | 01/01/70 00:00 | |
| Classic atomic problem | 01/01/70 00:00 | |
| and/or ... | 01/01/70 00:00 | |
another example | 01/01/70 00:00 |