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-rw-r--r--src/shared/qtlockedfile/qtlockedfile_win.cpp170
1 files changed, 0 insertions, 170 deletions
diff --git a/src/shared/qtlockedfile/qtlockedfile_win.cpp b/src/shared/qtlockedfile/qtlockedfile_win.cpp
deleted file mode 100644
index 2f35635b55..0000000000
--- a/src/shared/qtlockedfile/qtlockedfile_win.cpp
+++ /dev/null
@@ -1,170 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
-
-#include "qtlockedfile.h"
-
-#include <qt_windows.h>
-#include <QFileInfo>
-
-namespace SharedTools {
-
-#define SEMAPHORE_PREFIX "QtLockedFile semaphore "
-#define MUTEX_PREFIX "QtLockedFile mutex "
-#define SEMAPHORE_MAX 100
-
-static QString errorCodeToString(DWORD errorCode)
-{
- QString result;
- char *data = 0;
- FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
- 0, errorCode, 0,
- (char*)&data, 0, 0);
- result = QString::fromLocal8Bit(data);
- if (data != 0)
- LocalFree(data);
-
- if (result.endsWith(QLatin1Char('\n')))
- result.truncate(result.length() - 1);
-
- return result;
-}
-
-bool QtLockedFile::lock(LockMode mode, bool block)
-{
- if (!isOpen()) {
- qWarning("QtLockedFile::lock(): file is not opened");
- return false;
- }
-
- if (mode == m_lock_mode)
- return true;
-
- if (m_lock_mode != 0)
- unlock();
-
- if (m_semaphore_hnd == 0) {
- QFileInfo fi(*this);
- QString sem_name = QString::fromLatin1(SEMAPHORE_PREFIX)
- + fi.absoluteFilePath().toLower();
-
- m_semaphore_hnd = CreateSemaphoreW(0, SEMAPHORE_MAX, SEMAPHORE_MAX,
- (TCHAR*)sem_name.utf16());
-
- if (m_semaphore_hnd == 0) {
- qWarning("QtLockedFile::lock(): CreateSemaphore: %s",
- errorCodeToString(GetLastError()).toLatin1().constData());
- return false;
- }
- }
-
- bool gotMutex = false;
- int decrement;
- if (mode == ReadLock) {
- decrement = 1;
- } else {
- decrement = SEMAPHORE_MAX;
- if (m_mutex_hnd == 0) {
- QFileInfo fi(*this);
- QString mut_name = QString::fromLatin1(MUTEX_PREFIX)
- + fi.absoluteFilePath().toLower();
-
- m_mutex_hnd = CreateMutexW(NULL, FALSE, (TCHAR*)mut_name.utf16());
-
- if (m_mutex_hnd == 0) {
- qWarning("QtLockedFile::lock(): CreateMutex: %s",
- errorCodeToString(GetLastError()).toLatin1().constData());
- return false;
- }
- }
- DWORD res = WaitForSingleObject(m_mutex_hnd, block ? INFINITE : 0);
- if (res == WAIT_TIMEOUT)
- return false;
- if (res == WAIT_FAILED) {
- qWarning("QtLockedFile::lock(): WaitForSingleObject (mutex): %s",
- errorCodeToString(GetLastError()).toLatin1().constData());
- return false;
- }
- gotMutex = true;
- }
-
- for (int i = 0; i < decrement; ++i) {
- DWORD res = WaitForSingleObject(m_semaphore_hnd, block ? INFINITE : 0);
- if (res == WAIT_TIMEOUT) {
- if (i) {
- // A failed nonblocking rw locking. Undo changes to semaphore.
- if (ReleaseSemaphore(m_semaphore_hnd, i, NULL) == 0) {
- qWarning("QtLockedFile::unlock(): ReleaseSemaphore: %s",
- errorCodeToString(GetLastError()).toLatin1().constData());
- // Fall through
- }
- }
- if (gotMutex)
- ReleaseMutex(m_mutex_hnd);
- return false;
- }
- if (res != WAIT_OBJECT_0) {
- if (gotMutex)
- ReleaseMutex(m_mutex_hnd);
- qWarning("QtLockedFile::lock(): WaitForSingleObject (semaphore): %s",
- errorCodeToString(GetLastError()).toLatin1().constData());
- return false;
- }
- }
-
- m_lock_mode = mode;
- if (gotMutex)
- ReleaseMutex(m_mutex_hnd);
- return true;
-}
-
-bool QtLockedFile::unlock()
-{
- if (!isOpen()) {
- qWarning("QtLockedFile::unlock(): file is not opened");
- return false;
- }
-
- if (!isLocked())
- return true;
-
- int increment;
- if (m_lock_mode == ReadLock)
- increment = 1;
- else
- increment = SEMAPHORE_MAX;
-
- DWORD ret = ReleaseSemaphore(m_semaphore_hnd, increment, 0);
- if (ret == 0) {
- qWarning("QtLockedFile::unlock(): ReleaseSemaphore: %s",
- errorCodeToString(GetLastError()).toLatin1().constData());
- return false;
- }
-
- m_lock_mode = QtLockedFile::NoLock;
- remove();
- return true;
-}
-
-QtLockedFile::~QtLockedFile()
-{
- if (isOpen())
- unlock();
- if (m_mutex_hnd != 0) {
- DWORD ret = CloseHandle(m_mutex_hnd);
- if (ret == 0) {
- qWarning("QtLockedFile::~QtLockedFile(): CloseHandle (mutex): %s",
- errorCodeToString(GetLastError()).toLatin1().constData());
- }
- m_mutex_hnd = 0;
- }
- if (m_semaphore_hnd != 0) {
- DWORD ret = CloseHandle(m_semaphore_hnd);
- if (ret == 0) {
- qWarning("QtLockedFile::~QtLockedFile(): CloseHandle (semaphore): %s",
- errorCodeToString(GetLastError()).toLatin1().constData());
- }
- m_semaphore_hnd = 0;
- }
-}
-
-} // namespace SharedTools