cd8c36f2fe
spdk_ioviter_next will walk through two iovecs and yield pointers to common length segments. For example, given a source iovec (siov) with 4 1KiB elements and a destination iovec (diov) with 1 4KiB element, the following will happen: first spdk_ioviter_next: src = siov[0].iov_base dst = diov[0].iov_base len = 1KiB second spdk_ioviter_next: src = siov[1].iov_base dst = diov[0].iov_base + 1KiB len = 1KiB third spdk_ioviter_next: src = siov[2].iov_base dst = diov[0].iov_base + 2KiB len = 1KiB fourth spdk_ioviter_next: src = siov[3].iov_base dst = diov[0].iov_base + 3KiB len = 1KiB fifth spdk_ioviter_next: len = 0 This is a useful utility for performing operations where both the source and destination are scattered memory. As an example and a test vehicle, spdk_iovcpy has been updated to use this internally. Change-Id: I7e35e76d38e78d07ea1caf6282d0dfc02182aa83 Signed-off-by: Ben Walker <benjamin.walker@intel.com> Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/10284 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Community-CI: Mellanox Build Bot Reviewed-by: Changpeng Liu <changpeng.liu@intel.com> Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com> Reviewed-by: Paul Luse <paul.e.luse@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com>
49 lines
2.0 KiB
Makefile
49 lines
2.0 KiB
Makefile
#
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# BSD LICENSE
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#
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# Copyright (c) Intel Corporation.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of Intel Corporation nor the names of its
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# contributors may be used to endorse or promote products derived
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# from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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SPDK_ROOT_DIR := $(abspath $(CURDIR)/../..)
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include $(SPDK_ROOT_DIR)/mk/spdk.common.mk
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SO_VER := 4
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SO_MINOR := 1
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C_SRCS = base64.c bit_array.c cpuset.c crc16.c crc32.c crc32c.c crc32_ieee.c \
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dif.c fd.c file.c iov.c math.c pipe.c strerror_tls.c string.c uuid.c \
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fd_group.c zipf.c
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LIBNAME = util
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LOCAL_SYS_LIBS = -luuid
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SPDK_MAP_FILE = $(abspath $(CURDIR)/spdk_util.map)
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include $(SPDK_ROOT_DIR)/mk/spdk.lib.mk
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