Ejemplos de cloop_read_block en C++ (Cpp)

Ejemplo n.º 1

Archivo: cloop.c Proyecto: Isaac-Lozano/qemu

static int coroutine_fn
cloop_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
                QEMUIOVector *qiov, int flags)
{
    BDRVCloopState *s = bs->opaque;
    uint64_t sector_num = offset >> BDRV_SECTOR_BITS;
    int nb_sectors = bytes >> BDRV_SECTOR_BITS;
    int ret, i;

    assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
    assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);

    qemu_co_mutex_lock(&s->lock);

    for (i = 0; i < nb_sectors; i++) {
        void *data;
        uint32_t sector_offset_in_block =
            ((sector_num + i) % s->sectors_per_block),
            block_num = (sector_num + i) / s->sectors_per_block;
        if (cloop_read_block(bs, block_num) != 0) {
            ret = -EIO;
            goto fail;
        }

        data = s->uncompressed_block + sector_offset_in_block * 512;
        qemu_iovec_from_buf(qiov, i * 512, data, 512);
    }

    ret = 0;
fail:
    qemu_co_mutex_unlock(&s->lock);

    return ret;
}

Ejemplo n.º 2

Archivo: block-cloop.c Proyecto: doniexun/MemCheck

static int cloop_read(BlockDriverState *bs, int64_t sector_num,
                    uint8_t *buf, int nb_sectors)
{
    BDRVCloopState *s = (BDRVCloopState *)bs->opaque;
    int i;

    for(i=0;i<nb_sectors;i++) {
	uint32_t sector_offset_in_block=((sector_num+i)%s->sectors_per_block),
	    block_num=(sector_num+i)/s->sectors_per_block;
	if(cloop_read_block(s, block_num) != 0)
	    return -1;
	memcpy(buf+i*512,s->uncompressed_block+sector_offset_in_block*512,512);
    }
    return 0;
}