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@@ -21,6 +21,7 @@ extern "C"
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* Due to the design only <tt> RING_BUFFER_SIZE-1 </tt> items
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* Due to the design only <tt> RING_BUFFER_SIZE-1 </tt> items
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* can be contained in the buffer.
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* can be contained in the buffer.
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* buffer_size must be a power of two.
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* buffer_size must be a power of two.
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+ * 限制2^N 预计总耗时1.5 ms(位运算和内存对齐优势)， 可修改不限制但是预计总耗时12 ms
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*/
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*/
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#define RING_BUFFER_IS_POWER_OF_TWO(buffer_size) ((buffer_size & (buffer_size - 1)) == 0)
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#define RING_BUFFER_IS_POWER_OF_TWO(buffer_size) ((buffer_size & (buffer_size - 1)) == 0)
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