Function rte_bitmap_clear

dpdk/lib/eal/include/rte_bitmap.h:457–488

* Bitmap bit clear * * @param bmp * Handle to bitmap instance * @param pos * Bit position */

 *   Bit position
 */
static inline void
rte_bitmap_clear(struct rte_bitmap *bmp, uint32_t pos)
{
	uint64_t *slab1, *slab2;
	uint32_t index1, index2, offset1, offset2;

	/* Clear bit in array2 slab */
	index2 = pos >> RTE_BITMAP_SLAB_BIT_SIZE_LOG2;
	offset2 = pos & RTE_BITMAP_SLAB_BIT_MASK;
	slab2 = bmp->array2 + index2;

	/* Return if array2 slab is not all-zeros */
	*slab2 &= ~(1llu << offset2);
	if (*slab2){
		return;
	}

	/* Check the entire cache line of array2 for all-zeros */
	index2 &= ~ RTE_BITMAP_CL_SLAB_MASK;
	slab2 = bmp->array2 + index2;
	if (__rte_bitmap_line_not_empty(slab2)) {
		return;
	}

	/* The array2 cache line is all-zeros, so clear bit in array1 slab */
	index1 = pos >> (RTE_BITMAP_SLAB_BIT_SIZE_LOG2 + RTE_BITMAP_CL_BIT_SIZE_LOG2);
	offset1 = (pos >> RTE_BITMAP_CL_BIT_SIZE_LOG2) & RTE_BITMAP_SLAB_BIT_MASK;
	slab1 = bmp->array1 + index1;
	*slab1 &= ~(1llu << offset1);

	return;
}

static inline int
__rte_bitmap_scan_search(struct rte_bitmap *bmp)