ShuriZma
/
xenia
mirror of https://github.com/xenia-project/xenia.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

[Base] mapped_memory_win: more explicit invalid handle values

This commit is contained in:
Triang3l 2020-11-24 22:49:56 +03:00
parent a73592c2ef
commit d353cade76
1 changed files with 21 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
src/xenia/base/mapped_memory_win.cc
View File

@ -22,6 +22,11 @@ namespace xe {
class Win32MappedMemory : public MappedMemory {
public:
// CreateFile returns INVALID_HANDLE_VALUE in case of failure.
static constexpr HANDLE kFileHandleInvalid = INVALID_HANDLE_VALUE;
// CreateFileMapping returns nullptr in case of failure.
static constexpr HANDLE kMappingHandleInvalid = nullptr;
Win32MappedMemory(const std::filesystem::path& path, Mode mode)
: MappedMemory(path, mode) {}
@ -29,10 +34,10 @@ class Win32MappedMemory : public MappedMemory {
if (data_) {
UnmapViewOfFile(data_);
}
if (mapping_handle) {
if (mapping_handle != kMappingHandleInvalid) {
CloseHandle(mapping_handle);
}
if (file_handle != INVALID_HANDLE_VALUE) {
if (file_handle != kFileHandleInvalid) {
CloseHandle(file_handle);
}
}
@ -42,11 +47,11 @@ class Win32MappedMemory : public MappedMemory {
UnmapViewOfFile(data_);
data_ = nullptr;
}
if (mapping_handle) {
if (mapping_handle != kMappingHandleInvalid) {
CloseHandle(mapping_handle);
mapping_handle = nullptr;
mapping_handle = kMappingHandleInvalid;
}
if (file_handle != INVALID_HANDLE_VALUE) {
if (file_handle != kFileHandleInvalid) {
if (truncate_size) {
LONG distance_high = truncate_size >> 32;
SetFilePointer(file_handle, truncate_size & 0xFFFFFFFF, &distance_high,
@ -55,7 +60,7 @@ class Win32MappedMemory : public MappedMemory {
}
CloseHandle(file_handle);
file_handle = INVALID_HANDLE_VALUE;
file_handle = kFileHandleInvalid;
}
}
@ -88,8 +93,8 @@ class Win32MappedMemory : public MappedMemory {
return true;
}
HANDLE file_handle = INVALID_HANDLE_VALUE;
HANDLE mapping_handle = nullptr;
HANDLE file_handle = kFileHandleInvalid;
HANDLE mapping_handle = kMappingHandleInvalid;
DWORD view_access_ = 0;
};
@ -130,7 +135,7 @@ std::unique_ptr<MappedMemory> MappedMemory::Open(
mm->file_handle = CreateFile(path.c_str(), file_access, file_share, nullptr,
create_mode, FILE_ATTRIBUTE_NORMAL, nullptr);
if (mm->file_handle == INVALID_HANDLE_VALUE) {
if (mm->file_handle == Win32MappedMemory::kFileHandleInvalid) {
return nullptr;
}
@ -143,7 +148,7 @@ std::unique_ptr<MappedMemory> MappedMemory::Open(
CreateFileMappingFromApp(mm->file_handle, nullptr, ULONG(mapping_protect),
ULONG64(aligned_length), nullptr);
#endif
if (!mm->mapping_handle) {
if (mm->mapping_handle == Win32MappedMemory::kMappingHandleInvalid) {
return nullptr;
}
@ -220,8 +225,8 @@ class Win32ChunkedMappedMemoryWriter : public ChunkedMappedMemoryWriter {
class Chunk {
public:
explicit Chunk(size_t capacity)
: file_handle_(INVALID_HANDLE_VALUE),
mapping_handle_(nullptr),
: file_handle_(Win32MappedMemory::kFileHandleInvalid),
mapping_handle_(Win32MappedMemory::kMappingHandleInvalid),
data_(nullptr),
offset_(0),
capacity_(capacity),
@ -231,10 +236,10 @@ class Win32ChunkedMappedMemoryWriter : public ChunkedMappedMemoryWriter {
if (data_) {
UnmapViewOfFile(data_);
}
if (mapping_handle_) {
if (mapping_handle_ != Win32MappedMemory::kMappingHandleInvalid) {
CloseHandle(mapping_handle_);
}
if (file_handle_ != INVALID_HANDLE_VALUE) {
if (file_handle_ != Win32MappedMemory::kFileHandleInvalid) {
CloseHandle(file_handle_);
}
}
@ -248,7 +253,7 @@ class Win32ChunkedMappedMemoryWriter : public ChunkedMappedMemoryWriter {
file_handle_ = CreateFile(path.c_str(), file_access, file_share, nullptr,
create_mode, FILE_ATTRIBUTE_NORMAL, nullptr);
if (file_handle_ == INVALID_HANDLE_VALUE) {
if (file_handle_ == Win32MappedMemory::kFileHandleInvalid) {
return false;
}
@ -261,7 +266,7 @@ class Win32ChunkedMappedMemoryWriter : public ChunkedMappedMemoryWriter {
ULONG(mapping_protect),
ULONG64(capacity_), nullptr);
#endif
if (!mapping_handle_) {
if (mapping_handle_ == Win32MappedMemory::kMappingHandleInvalid) {
return false;
}