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WinRT: Shared memory support 

WinRT supports in-memory file mapping via CreateFileMappingFromApp. This
is unimplemented on Windows Phone.

Change-Id: Ic5692e501cd2fe9e1337829bdeb933fccc804abe
Done-with: Andrew Knight
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@digia.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
bb10
Andrew Knight 2013-09-13 12:01:16 +03:00 committed by The Qt Project
parent 95e0da216f
commit 89f299201d
1 changed files with 27 additions and 3 deletions
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30
src/corelib/kernel/qsharedmemory_win.cpp
View File

@ -105,12 +105,17 @@ HANDLE QSharedMemoryPrivate::handle()
errorString = QSharedMemory::tr("%1: unable to make key").arg(function);
return 0;
}
#ifndef Q_OS_WINCE
hand = OpenFileMapping(FILE_MAP_ALL_ACCESS, false, (wchar_t*)nativeKey.utf16());
#else
#if defined(Q_OS_WINPHONE)
Q_UNIMPLEMENTED();
hand = 0;
#elif defined(Q_OS_WINRT)
hand = CreateFileMappingFromApp(INVALID_HANDLE_VALUE, 0, PAGE_READWRITE, 0, (PCWSTR)nativeKey.utf16());
#elif defined(Q_OS_WINCE)
// This works for opening a mapping too, but always opens it with read/write access in
// attach as it seems.
hand = CreateFileMapping(INVALID_HANDLE_VALUE, 0, PAGE_READWRITE, 0, 0, (wchar_t*)nativeKey.utf16());
#else
hand = OpenFileMapping(FILE_MAP_ALL_ACCESS, false, (wchar_t*)nativeKey.utf16());
#endif
if (!hand) {
setErrorString(function);
@ -141,7 +146,14 @@ bool QSharedMemoryPrivate::create(int size)
}
// Create the file mapping.
#if defined(Q_OS_WINPHONE)
Q_UNIMPLEMENTED();
hand = 0;
#elif defined(Q_OS_WINRT)
hand = CreateFileMappingFromApp(INVALID_HANDLE_VALUE, 0, PAGE_READWRITE, size, (PCWSTR)nativeKey.utf16());
#else
hand = CreateFileMapping(INVALID_HANDLE_VALUE, 0, PAGE_READWRITE, 0, size, (wchar_t*)nativeKey.utf16());
#endif
setErrorString(function);
// hand is valid when it already exists unlike unix so explicitly check
@ -155,7 +167,14 @@ bool QSharedMemoryPrivate::attach(QSharedMemory::AccessMode mode)
{
// Grab a pointer to the memory block
int permissions = (mode == QSharedMemory::ReadOnly ? FILE_MAP_READ : FILE_MAP_ALL_ACCESS);
#if defined(Q_OS_WINPHONE)
Q_UNIMPLEMENTED();
memory = 0;
#elif defined(Q_OS_WINRT)
memory = (void *)MapViewOfFileFromApp(handle(), permissions, 0, 0);
#else
memory = (void *)MapViewOfFile(handle(), permissions, 0, 0, 0);
#endif
if (0 == memory) {
setErrorString(QLatin1String("QSharedMemory::attach"));
cleanHandle();
@ -179,10 +198,15 @@ bool QSharedMemoryPrivate::attach(QSharedMemory::AccessMode mode)
bool QSharedMemoryPrivate::detach()
{
// umap memory
#if defined(Q_OS_WINPHONE)
Q_UNIMPLEMENTED();
return false;
#else
if (!UnmapViewOfFile(memory)) {
setErrorString(QLatin1String("QSharedMemory::detach"));
return false;
}
#endif
memory = 0;
size = 0;