73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
// Copyright (c) 2012-2014, The CryptoNote developers, The Bytecoin developers
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//
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// This file is part of Bytecoin.
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//
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// Bytecoin is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Bytecoin is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with Bytecoin. If not, see <http://www.gnu.org/licenses/>.
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#include <new>
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#include "hash.h"
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#if defined(WIN32)
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#include <Windows.h>
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#else
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#include <sys/mman.h>
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#endif
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using std::bad_alloc;
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namespace crypto {
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enum {
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MAP_SIZE = SLOW_HASH_CONTEXT_SIZE + ((-SLOW_HASH_CONTEXT_SIZE) & 0xfff)
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};
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#if defined(WIN32)
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cn_context::cn_context() {
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data = VirtualAlloc(nullptr, MAP_SIZE, MEM_COMMIT, PAGE_READWRITE);
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if (data == nullptr) {
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throw bad_alloc();
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}
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}
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cn_context::~cn_context() {
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if (!VirtualFree(data, 0, MEM_RELEASE)) {
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throw bad_alloc();
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}
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}
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#else
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cn_context::cn_context() {
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#if !defined(__APPLE__)
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data = mmap(nullptr, MAP_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, -1, 0);
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#else
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data = mmap(nullptr, MAP_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
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#endif
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if (data == MAP_FAILED) {
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throw bad_alloc();
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}
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mlock(data, MAP_SIZE);
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}
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cn_context::~cn_context() {
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if (munmap(data, MAP_SIZE) != 0) {
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throw bad_alloc();
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}
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}
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#endif
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}
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