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Also support atomic windows readAt

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This commit is contained in:
Simonas Kazlauskas 2017-06-23 18:40:00 +03:00
parent 3c3596dbf2
commit 3f63c29736
2 changed files with 19 additions and 1 deletions
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2
Common/CommonFuncs.h
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@ -60,6 +60,7 @@ inline u64 __rotr64(u64 x, unsigned int shift){
}
#else // WIN32
#include <io.h>
// Function Cross-Compatibility
#define strcasecmp _stricmp
@ -75,6 +76,7 @@ inline u64 __rotr64(u64 x, unsigned int shift){
#define ftello _ftelli64
#define atoll _atoi64
#define fileno _fileno
#define fileno_to_handle _get_osfhandle
#if _M_IX86
#define Crash() {__asm int 3}
#else

18
Core/FileLoaders/LocalFileLoader.cpp
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@ -18,6 +18,9 @@
#include "file/file_util.h"
#include "Common/FileUtil.h"
#include "Core/FileLoaders/LocalFileLoader.h"
#ifdef _WIN32
#include "Common/CommonWindows.h"
#endif
LocalFileLoader::LocalFileLoader(const std::string &filename)
: fd_(0), f_(nullptr), filesize_(0), filename_(filename) {
@ -73,5 +76,18 @@ std::string LocalFileLoader::Path() const {
}
size_t LocalFileLoader::ReadAt(s64 absolutePos, size_t bytes, size_t count, void *data, Flags flags) {
return pread(fd_, data, bytes * count, absolutePos) / bytes;
#ifndef _WIN32
return pread(fd_, data, bytes * count, absolutePos) / bytes;
#else
DWORD read = -1;
intptr_t handle = fileno_to_handle(fd_);
if (handle == 0) {
return -1;
}
OVERLAPPED offset = { 0 };
offset.Offset = (DWORD)(absolutePos & 0xffffffff);
offset.OffsetHigh = (DWORD)((absolutePos & 0xffffffff00000000) >> 32);
auto result = ReadFile((HANDLE)handle, data, bytes * count, &read, &offset);
return result == TRUE ? (size_t)read / bytes : -1;
#endif
}