ringbuffer还原到最初状态

library/ringbuffer/ringbuffer.c

@@ -78,7 +78,6 @@ void rd_RingbufferInit(rd_ringbuf_t *rb, char *pool, int size)
 int rd_RingbufferSpaceLen(rd_ringbuf_t *rb)
 {
     if (!rb) return -1;
-    int iRet = 0;
 
     unsigned short wi = ATOMIC_LOAD(&rb->m_sWriteIndex, unsigned short, ATOMIC_ORDER_ACQUIRE);
     unsigned short ri = ATOMIC_LOAD(&rb->m_sReadIndex, unsigned short, ATOMIC_ORDER_RELAXED);
@@ -86,19 +85,9 @@ int rd_RingbufferSpaceLen(rd_ringbuf_t *rb)
     unsigned char rb_m = ATOMIC_LOAD(&rb->m_bReadMirror, unsigned char, ATOMIC_ORDER_RELAXED);
 
     if (wb == rb_m) {
-    	iRet = rb->m_iBufsize - (wi - ri);
+    	return rb->m_iBufsize - (wi - ri);
     } else {
-    	iRet =  ri - wi;
-    }
-
-    if (iRet >= 0)
-    {
-    	return iRet;
-    }
-    else
-    {
-    	log_e("wb = %d, rb_m = %d, wi = %d, ri = %d", wb, rb_m, wi, ri);
-    	return 0;
+    	return ri - wi;
     }
 }