fix compile error under mingw/windows.

Signed-off-by: Ji Bin <[email protected]>

CMakeLists.txt

@@ -64,6 +64,9 @@ include(cmake/libs/libeasylogging.cmake)
 include_directories(thirdparty/faiss)
 include_directories(thirdparty/bitset)
 include_directories(thirdparty)
+if(WIN32)
+  include_directories(thirdparty/mman-win32)
+endif()
 
 find_package(OpenMP REQUIRED)
 

src/simd/distances_sse.cc

@@ -15,6 +15,7 @@
 #include <immintrin.h>
 
 #include <cassert>
+#include <cstdint>
 
 #include "distances_ref.h"
 

thirdparty/mman-win32/sys/mman.h

@@ -0,0 +1,242 @@
+
+// This is from https://code.google.com/p/mman-win32/
+//
+// Licensed under MIT
+
+#ifndef _MMAN_WIN32_H
+#define _MMAN_WIN32_H
+
+#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
+
+#include <sys/types.h>
+#include <windows.h>
+#include <errno.h>
+#include <io.h>
+
+#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
+
+#ifndef FILE_MAP_EXECUTE
+#define FILE_MAP_EXECUTE    0x0020
+#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;
+}
+
+inline void* mmap(void *addr, size_t len, int prot, int flags, int fildes, off_t off)
+{
+    HANDLE fm, h;
+
+    void * map = MAP_FAILED;
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable: 4293)
+#endif
+
+    const DWORD dwFileOffsetLow = (sizeof(off_t) <= sizeof(DWORD)) ?
+                    (DWORD)off : (DWORD)(off & 0xFFFFFFFFL);
+    const DWORD dwFileOffsetHigh = (sizeof(off_t) <= 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 off_t maxSize = off + (off_t)len;
+
+    const DWORD dwMaxSizeLow = (sizeof(off_t) <= sizeof(DWORD)) ?
+                    (DWORD)maxSize : (DWORD)(maxSize & 0xFFFFFFFFL);
+    const DWORD dwMaxSizeHigh = (sizeof(off_t) <= 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(fildes) : 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;
+}
+
+inline int munmap(void *addr, size_t len)
+{
+    if (UnmapViewOfFile(addr))
+        return 0;
+
+    errno =  __map_mman_error(GetLastError(), EPERM);
+
+    return -1;
+}
+
+inline 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;
+}
+
+inline int msync(void *addr, size_t len, int flags)
+{
+    if (FlushViewOfFile(addr, len))
+        return 0;
+
+    errno =  __map_mman_error(GetLastError(), EPERM);
+
+    return -1;
+}
+
+inline int mlock(const void *addr, size_t len)
+{
+    if (VirtualLock((LPVOID)addr, len))
+        return 0;
+
+    errno =  __map_mman_error(GetLastError(), EPERM);
+
+    return -1;
+}
+
+inline int munlock(const void *addr, size_t len)
+{
+    if (VirtualUnlock((LPVOID)addr, len))
+        return 0;
+
+    errno =  __map_mman_error(GetLastError(), EPERM);
+
+    return -1;
+}
+
+#if !defined(__MINGW32__)
+inline int ftruncate(const int fd, const int64_t size) {
+    if (fd < 0) {
+        errno = EBADF;
+        return -1;
+    }
+
+    HANDLE h = reinterpret_cast<HANDLE>(_get_osfhandle(fd));
+    LARGE_INTEGER li_start, li_size;
+    li_start.QuadPart = static_cast<int64_t>(0);
+    li_size.QuadPart = size;
+    if (SetFilePointerEx(h, li_start, NULL, FILE_CURRENT) == ~0 ||
+        SetFilePointerEx(h, li_size, NULL, FILE_BEGIN) == ~0 ||
+        !SetEndOfFile(h)) {
+        unsigned long error = GetLastError();
+        fprintf(stderr, "I/O error while truncating: %lu\n", error);
+        switch (error) {
+            case ERROR_INVALID_HANDLE:
+                errno = EBADF;
+                break;
+            default:
+                errno = EIO;
+                break;
+        }
+        return -1;
+    }
+    return 0;
+}
+#endif
+
+#endif