45 lines
1.4 KiB
C++
45 lines
1.4 KiB
C++
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/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <unistd.h>
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#include "jemalloc.h"
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void* je_pvalloc(size_t bytes) {
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size_t pagesize = sysconf(_SC_PAGESIZE);
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return je_memalign(pagesize, (bytes + pagesize - 1) & ~(pagesize - 1));
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}
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#ifdef je_memalign
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#undef je_memalign
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#endif
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// The man page for memalign says it fails if boundary is not a power of 2,
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// but this is not true. Both glibc and dlmalloc round up to the next power
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// of 2, so we'll do the same.
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void* je_memalign_round_up_boundary(size_t boundary, size_t size) {
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unsigned int power_of_2 = static_cast<unsigned int>(boundary);
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if (power_of_2 != 0) {
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power_of_2 = 1UL << (sizeof(unsigned int)*8 - 1 - __builtin_clz(power_of_2));
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if (power_of_2 != boundary) {
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boundary = power_of_2 << 1;
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}
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} else {
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boundary = 1;
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}
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return je_memalign(boundary, size);
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}
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