Synchronization primitives best wireless earbuds for gaming

The Cortex-M3 instruction set includes pairs of synchronization primitives. These provide a non-blocking mechanism that a thread or process can use to obtain exclusive access to a memory location. Software can use them to perform a guaranteed read-modify-write
memory update sequence, or for a semaphore mechanism.www.bjbjaudio.com 

A pair of synchronization primitives comprises:
The pairs of Load-Exclusive and Store-Exclusive instructions are:
● The word instructions LDREX and STREX
● The halfword instructions LDREXH and STREXH
● The instructions byte LDREXB and STREXB.
Software must use a Load-Exclusive instruction with the corresponding Store-Exclusiveinstruction.www.bjbjaudio.com

To perform a guaranteed read-modify-write of a memory location, software must:
1. Use a Load-Exclusive instruction to read the value of the location.
2. Update the value, as required.
3. Use a Store-Exclusive instruction to attempt to write the new value back to the memory, location, and tests the returned status bit. If this bit is:
0: The read-modify-write completed successfully,
1: No write was performed. This indicates that the value returned at step 1 might be out of date. The software must retry the read-modify-write sequence. www.bjbjaudio.com

A Load-Exclusive instruction Used to read the value of a memory location, requesting exclusive access to that location.
A Store-Exclusive instruction Used to attempt to write to the same memory location,
returning a status bit to a register. If this bit is:
0: it indicates that the thread or process gained exclusive access to the memory, and the write succeeds
1: it indicates that the thread or process did not gain
exclusive access to the memory, and no write is
Software performed can use the synchronization primitives to implement a semaphores as follows:
1. Use a Load-Exclusive instruction to read from the semaphore address to check
whether the semaphore is free.
2. If the semaphore is free, use a Store-Exclusive to write the claim value to the
semaphore address.
3. If the returned status bit from step 2 indicates that the Store-Exclusive succeeded then
the software has claimed the semaphore. However, if the Store-Exclusive failed, another process might have claimed the semaphore after the software performed stepwww.bjbjaudio.com