331 lines
8.5 KiB
C++
331 lines
8.5 KiB
C++
/*******************************************************************************
|
|
* Copyright (c) 2015-2018 Skymind, Inc.
|
|
*
|
|
* This program and the accompanying materials are made available under the
|
|
* terms of the Apache License, Version 2.0 which is available at
|
|
* https://www.apache.org/licenses/LICENSE-2.0.
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
******************************************************************************/
|
|
|
|
// mmap for win32 platform using win32 api
|
|
//
|
|
// https://code.google.com/p/mman-win32/
|
|
//
|
|
|
|
#ifndef _SYS_MMAN_H_
|
|
#define _SYS_MMAN_H_
|
|
|
|
#include <windows.h>
|
|
#include <errno.h>
|
|
#include <io.h>
|
|
|
|
#ifndef FILE_MAP_EXECUTE
|
|
#define FILE_MAP_EXECUTE 0x0020
|
|
#endif /* FILE_MAP_EXECUTE */
|
|
|
|
#ifndef _WIN32_WINNT // Allow use of features specific to Windows XP or later.
|
|
#define _WIN32_WINNT 0x0501 // Change this to the appropriate value to target other versions of Windows.
|
|
#endif
|
|
|
|
/* All the headers include this file. */
|
|
#ifndef _MSC_VER
|
|
#include <_mingw.h>
|
|
#endif
|
|
|
|
/* Determine offset type */
|
|
#include <stdint.h>
|
|
#if defined(_WIN64)
|
|
typedef int64_t OffsetType;
|
|
#else
|
|
typedef uint32_t OffsetType;
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define PROT_NONE 0
|
|
#define PROT_READ 1
|
|
#define PROT_WRITE 2
|
|
#define PROT_EXEC 4
|
|
|
|
#define MAP_FILE 0
|
|
#define MAP_SHARED 1
|
|
#define MAP_PRIVATE 2
|
|
#define MAP_TYPE 0xf
|
|
#define MAP_FIXED 0x10
|
|
#define MAP_ANONYMOUS 0x20
|
|
#define MAP_ANON MAP_ANONYMOUS
|
|
|
|
#define MAP_FAILED ((void *)-1)
|
|
|
|
/* Flags for msync. */
|
|
#define MS_ASYNC 1
|
|
#define MS_SYNC 2
|
|
#define MS_INVALIDATE 4
|
|
|
|
void _mmap(Nd4jLong* result, size_t length, const char *fileName);
|
|
void* mmap(void *addr, size_t len, int prot, int flags, int fildes, OffsetType off);
|
|
int munmap(void *addr, size_t len);
|
|
int _mprotect(void *addr, size_t len, int prot);
|
|
int msync(void *addr, size_t len, int flags);
|
|
int mlock(const void *addr, size_t len);
|
|
int munlock(const void *addr, size_t len);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
static int __map_mman_error(const DWORD err, const int deferr)
|
|
{
|
|
if (err == 0)
|
|
return 0;
|
|
//TODO: implement
|
|
return err;
|
|
}
|
|
|
|
static DWORD __map_mmap_prot_page(const int prot)
|
|
{
|
|
DWORD protect = 0;
|
|
|
|
if (prot == PROT_NONE)
|
|
return protect;
|
|
|
|
if ((prot & PROT_EXEC) != 0)
|
|
{
|
|
protect = ((prot & PROT_WRITE) != 0) ?
|
|
PAGE_EXECUTE_READWRITE : PAGE_EXECUTE_READ;
|
|
}
|
|
else
|
|
{
|
|
protect = ((prot & PROT_WRITE) != 0) ?
|
|
PAGE_READWRITE : PAGE_READONLY;
|
|
}
|
|
|
|
return protect;
|
|
}
|
|
|
|
static DWORD __map_mmap_prot_file(const int prot)
|
|
{
|
|
DWORD desiredAccess = 0;
|
|
|
|
if (prot == PROT_NONE)
|
|
return desiredAccess;
|
|
|
|
if ((prot & PROT_READ) != 0)
|
|
desiredAccess |= FILE_MAP_READ;
|
|
if ((prot & PROT_WRITE) != 0)
|
|
desiredAccess |= FILE_MAP_WRITE;
|
|
if ((prot & PROT_EXEC) != 0)
|
|
desiredAccess |= FILE_MAP_EXECUTE;
|
|
|
|
return desiredAccess;
|
|
}
|
|
|
|
void _mmap(Nd4jLong* result, size_t length, const char *fileName) {
|
|
HANDLE fm, h;
|
|
|
|
void * map = MAP_FAILED;
|
|
OffsetType off = 0;
|
|
int prot = PROT_READ | PROT_WRITE;
|
|
|
|
// we need to convert long path (probably) to short pat (actually)
|
|
// it's Windows API, in the middle of 2018!
|
|
auto sz = GetShortPathName(fileName, nullptr, 0);
|
|
|
|
auto shortName = new TCHAR[sz];
|
|
GetShortPathName(fileName, shortName, sz);
|
|
|
|
delete[] shortName;
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma warning(push)
|
|
#pragma warning(disable: 4293)
|
|
#endif
|
|
|
|
const DWORD dwFileOffsetLow = (sizeof(OffsetType) <= sizeof(DWORD)) ?
|
|
(DWORD)off : (DWORD)(off & 0xFFFFFFFFL);
|
|
const DWORD dwFileOffsetHigh = (sizeof(OffsetType) <= sizeof(DWORD)) ?
|
|
(DWORD)0 : (DWORD)((off >> 32) & 0xFFFFFFFFL);
|
|
const DWORD protect = __map_mmap_prot_page(prot);
|
|
const DWORD desiredAccess = __map_mmap_prot_file(prot);
|
|
|
|
const OffsetType maxSize = off + (OffsetType) length;
|
|
|
|
const DWORD dwMaxSizeLow = (sizeof(OffsetType) <= sizeof(DWORD)) ?
|
|
(DWORD)maxSize : (DWORD)(maxSize & 0xFFFFFFFFL);
|
|
const DWORD dwMaxSizeHigh = (sizeof(OffsetType) <= sizeof(DWORD)) ?
|
|
(DWORD)0 : (DWORD)((maxSize >> 32) & 0xFFFFFFFFL);
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma warning(pop)
|
|
#endif
|
|
|
|
h = CreateFile(shortName, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_WRITE | FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr);
|
|
|
|
if (h == INVALID_HANDLE_VALUE) {
|
|
errno = __map_mman_error(GetLastError(), EPERM);
|
|
nd4j_printf("Error code: %i\n", (int) errno);
|
|
throw std::runtime_error("CreateFile failed");
|
|
}
|
|
|
|
fm = CreateFileMapping(h, NULL, protect, dwMaxSizeHigh, dwMaxSizeLow, NULL);
|
|
|
|
if (fm == NULL)
|
|
{
|
|
errno = __map_mman_error(GetLastError(), EPERM);
|
|
throw std::runtime_error("CreateFileMapping failed");
|
|
}
|
|
|
|
map = MapViewOfFile(fm, desiredAccess, dwFileOffsetHigh, dwFileOffsetLow, length);
|
|
|
|
CloseHandle(fm);
|
|
|
|
if (map == NULL)
|
|
{
|
|
errno = __map_mman_error(GetLastError(), EPERM);
|
|
throw std::runtime_error("MapViewOfFile failed");
|
|
}
|
|
|
|
result[0] = reinterpret_cast<Nd4jLong>(map);
|
|
result[1] = reinterpret_cast<Nd4jLong>(h);
|
|
}
|
|
|
|
void* mmap(void *addr, size_t len, int prot, int flags, int files, OffsetType off)
|
|
{
|
|
HANDLE fm, h;
|
|
|
|
void * map = MAP_FAILED;
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma warning(push)
|
|
#pragma warning(disable: 4293)
|
|
#endif
|
|
|
|
const DWORD dwFileOffsetLow = (sizeof(OffsetType) <= sizeof(DWORD)) ?
|
|
(DWORD)off : (DWORD)(off & 0xFFFFFFFFL);
|
|
const DWORD dwFileOffsetHigh = (sizeof(OffsetType) <= sizeof(DWORD)) ?
|
|
(DWORD)0 : (DWORD)((off >> 32) & 0xFFFFFFFFL);
|
|
const DWORD protect = __map_mmap_prot_page(prot);
|
|
const DWORD desiredAccess = __map_mmap_prot_file(prot);
|
|
|
|
const OffsetType maxSize = off + (OffsetType)len;
|
|
|
|
const DWORD dwMaxSizeLow = (sizeof(OffsetType) <= sizeof(DWORD)) ?
|
|
(DWORD)maxSize : (DWORD)(maxSize & 0xFFFFFFFFL);
|
|
const DWORD dwMaxSizeHigh = (sizeof(OffsetType) <= sizeof(DWORD)) ?
|
|
(DWORD)0 : (DWORD)((maxSize >> 32) & 0xFFFFFFFFL);
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma warning(pop)
|
|
#endif
|
|
|
|
errno = 0;
|
|
|
|
if (len == 0
|
|
/* Unsupported flag combinations */
|
|
|| (flags & MAP_FIXED) != 0
|
|
/* Usupported protection combinations */
|
|
|| prot == PROT_EXEC)
|
|
{
|
|
errno = EINVAL;
|
|
return MAP_FAILED;
|
|
}
|
|
|
|
h = ((flags & MAP_ANONYMOUS) == 0) ?
|
|
(HANDLE)_get_osfhandle(files) : INVALID_HANDLE_VALUE;
|
|
|
|
|
|
if ((flags & MAP_ANONYMOUS) == 0 && h == INVALID_HANDLE_VALUE)
|
|
{
|
|
errno = EBADF;
|
|
return MAP_FAILED;
|
|
}
|
|
|
|
fm = CreateFileMapping(h, NULL, protect, dwMaxSizeHigh, dwMaxSizeLow, NULL);
|
|
|
|
if (fm == NULL)
|
|
{
|
|
errno = __map_mman_error(GetLastError(), EPERM);
|
|
return MAP_FAILED;
|
|
}
|
|
|
|
map = MapViewOfFile(fm, desiredAccess, dwFileOffsetHigh, dwFileOffsetLow, len);
|
|
|
|
CloseHandle(fm);
|
|
|
|
if (map == NULL)
|
|
{
|
|
errno = __map_mman_error(GetLastError(), EPERM);
|
|
return MAP_FAILED;
|
|
}
|
|
|
|
return map;
|
|
}
|
|
|
|
int munmap(void *addr, size_t len)
|
|
{
|
|
if (UnmapViewOfFile(addr))
|
|
return 0;
|
|
|
|
errno = __map_mman_error(GetLastError(), EPERM);
|
|
|
|
return -1;
|
|
}
|
|
|
|
int _mprotect(void *addr, size_t len, int prot)
|
|
{
|
|
DWORD newProtect = __map_mmap_prot_page(prot);
|
|
DWORD oldProtect = 0;
|
|
|
|
if (VirtualProtect(addr, len, newProtect, &oldProtect))
|
|
return 0;
|
|
|
|
errno = __map_mman_error(GetLastError(), EPERM);
|
|
|
|
return -1;
|
|
}
|
|
|
|
int msync(void *addr, size_t len, int flags)
|
|
|
|
{
|
|
if (FlushViewOfFile(addr, len))
|
|
return 0;
|
|
|
|
errno = __map_mman_error(GetLastError(), EPERM);
|
|
|
|
return -1;
|
|
}
|
|
|
|
int mlock(const void *addr, size_t len)
|
|
{
|
|
if (VirtualLock((LPVOID)addr, len))
|
|
return 0;
|
|
|
|
errno = __map_mman_error(GetLastError(), EPERM);
|
|
|
|
return -1;
|
|
}
|
|
|
|
int munlock(const void *addr, size_t len)
|
|
{
|
|
if (VirtualUnlock((LPVOID)addr, len))
|
|
return 0;
|
|
|
|
errno = __map_mman_error(GetLastError(), EPERM);
|
|
|
|
return -1;
|
|
}
|
|
|
|
|
|
#endif //PROJECT_MMAN_H
|