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by rcxdude
2362 days ago
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It allows the compiler to reorder it with any non-volatile read or write. Of course it still doesn't indicate anything to the CPU. In single-core embedded systems where the CPU doesn't reorder anything and you know the compiler is going to emit a single instruction for a read or write it can be sufficient (for example, this is how FreeRTOS implements all of its threading primitives) |
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