зеркало из https://github.com/mozilla/gecko-dev.git
65 строки
1.5 KiB
C++
65 строки
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "mozilla/devtools/AutoMemMap.h"
|
|
|
|
#include "mozilla/Unused.h"
|
|
#include "nsDebug.h"
|
|
|
|
namespace mozilla {
|
|
namespace devtools {
|
|
|
|
AutoMemMap::~AutoMemMap()
|
|
{
|
|
if (addr) {
|
|
Unused << NS_WARN_IF(PR_MemUnmap(addr, size()) != PR_SUCCESS);
|
|
addr = nullptr;
|
|
}
|
|
|
|
if (fileMap) {
|
|
Unused << NS_WARN_IF(PR_CloseFileMap(fileMap) != PR_SUCCESS);
|
|
fileMap = nullptr;
|
|
}
|
|
|
|
if (fd) {
|
|
Unused << NS_WARN_IF(PR_Close(fd) != PR_SUCCESS);
|
|
fd = nullptr;
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
AutoMemMap::init(const char* filePath, int flags, int mode, PRFileMapProtect prot)
|
|
{
|
|
MOZ_ASSERT(!fd);
|
|
MOZ_ASSERT(!fileMap);
|
|
MOZ_ASSERT(!addr);
|
|
|
|
if (PR_GetFileInfo64(filePath, &fileInfo) != PR_SUCCESS)
|
|
return NS_ERROR_FILE_NOT_FOUND;
|
|
|
|
// Check if the file is too big to memmap.
|
|
if (fileInfo.size > int64_t(UINT32_MAX))
|
|
return NS_ERROR_INVALID_ARG;
|
|
auto length = uint32_t(fileInfo.size);
|
|
|
|
fd = PR_Open(filePath, flags, flags);
|
|
if (!fd)
|
|
return NS_ERROR_UNEXPECTED;
|
|
|
|
fileMap = PR_CreateFileMap(fd, fileInfo.size, prot);
|
|
if (!fileMap)
|
|
return NS_ERROR_UNEXPECTED;
|
|
|
|
addr = PR_MemMap(fileMap, 0, length);
|
|
if (!addr)
|
|
return NS_ERROR_UNEXPECTED;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
} // namespace devtools
|
|
} // namespace mozilla
|