mirror of https://gitee.com/bigwinds/arangodb
87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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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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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Dr. Frank Celler
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////////////////////////////////////////////////////////////////////////////////
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#ifdef ARANGODB_ENABLE_MAINTAINER_MODE
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#include <cstring>
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#endif
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#include <cstdlib>
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#include "Basics/Common.h"
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#include "Basics/error.h"
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#include "Basics/voc-errors.h"
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#ifdef _WIN32
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#include <windows.h>
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#endif
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/// @brief basic memory management for allocate
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void* TRI_Allocate(size_t n) {
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void* m = ::malloc(n);
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if (m == nullptr) {
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TRI_set_errno(TRI_ERROR_OUT_OF_MEMORY);
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return nullptr;
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}
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#ifdef ARANGODB_ENABLE_MAINTAINER_MODE
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// prefill with 0xA5 (magic value, same as Valgrind will use)
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memset(m, 0xA5, n);
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#endif
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return m;
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}
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/// @brief basic memory management for reallocate
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void* TRI_Reallocate(void* m, size_t n) {
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if (m == nullptr) {
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return TRI_Allocate(n);
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}
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void* p = ::realloc(m, n);
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if (p == nullptr) {
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TRI_set_errno(TRI_ERROR_OUT_OF_MEMORY);
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return nullptr;
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}
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return p;
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}
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/// @brief basic memory management for deallocate
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void TRI_Free(void* m) { ::free(m); }
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/// @brief securely zero memory
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void TRI_ZeroMemory(void* m, size_t size) {
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#ifdef _WIN32
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SecureZeroMemory(m, size);
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#else
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// use volatile in order to not optimize away the zeroing
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volatile char* ptr = reinterpret_cast<volatile char*>(m);
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volatile char* end = ptr + size;
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while (ptr < end) {
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*ptr++ = '\0';
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}
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#endif
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}
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