e412dd12e8
Currently, there are some useless includes in the codebase. We can use a tool named include-what-you-use to optimize these includes. By using a strict include-what-you-use policy, we can get lots of benefits from it.
48 lines
1.7 KiB
C++
48 lines
1.7 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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// This file is copied from
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// https://github.com/ClickHouse/ClickHouse/blob/master/base/base/mremap.cpp
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// and modified by Doris
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#include "vec/common/mremap.h"
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// IWYU pragma: no_include <bthread/errno.h>
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#include <errno.h> // IWYU pragma: keep
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#include <cstdlib>
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#include <cstring>
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void* mremap_fallback(void* old_address, size_t old_size, size_t new_size, int flags, int mmap_prot,
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int mmap_flags, int mmap_fd, off_t mmap_offset) {
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/// No actual shrink
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if (new_size < old_size) return old_address;
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if (!(flags & MREMAP_MAYMOVE)) {
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errno = ENOMEM;
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return MAP_FAILED;
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}
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void* new_address = mmap(nullptr, new_size, mmap_prot, mmap_flags, mmap_fd, mmap_offset);
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if (MAP_FAILED == new_address) return MAP_FAILED;
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memcpy(new_address, old_address, old_size);
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if (munmap(old_address, old_size)) abort();
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return new_address;
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}
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