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authorPetr Mrázek <peterix@gmail.com>2018-07-15 14:51:05 +0200
committerPetr Mrázek <peterix@gmail.com>2018-07-15 14:51:05 +0200
commitbbb3b3e6f6e3c0f95873f22e6d0a4aaf350f49d9 (patch)
treee6497e304b7b9368367565fbc7c06efab1124b1c /libraries/LocalPeer/src/LockedFile_win.cpp
parent03280cc62e75f8073f8d3d9e9e3952acf21fa77d (diff)
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Diffstat (limited to 'libraries/LocalPeer/src/LockedFile_win.cpp')
-rw-r--r--libraries/LocalPeer/src/LockedFile_win.cpp272
1 files changed, 136 insertions, 136 deletions
diff --git a/libraries/LocalPeer/src/LockedFile_win.cpp b/libraries/LocalPeer/src/LockedFile_win.cpp
index 31238190..93d2c73b 100644
--- a/libraries/LocalPeer/src/LockedFile_win.cpp
+++ b/libraries/LocalPeer/src/LockedFile_win.cpp
@@ -48,158 +48,158 @@
Qt::HANDLE LockedFile::getMutexHandle(int idx, bool doCreate)
{
- if (mutexname.isEmpty()) {
- QFileInfo fi(*this);
- mutexname = QString::fromLatin1(MUTEX_PREFIX)
- + fi.absoluteFilePath().toLower();
- }
- QString mname(mutexname);
- if (idx >= 0)
- mname += QString::number(idx);
-
- Qt::HANDLE mutex;
- if (doCreate) {
- mutex = CreateMutexW(NULL, FALSE, (LPCWSTR)mname.utf16());
- if (!mutex) {
- qErrnoWarning("QtLockedFile::lock(): CreateMutex failed");
- return 0;
- }
- }
- else {
- mutex = OpenMutexW(SYNCHRONIZE | MUTEX_MODIFY_STATE, FALSE, (LPCWSTR)mname.utf16());
- if (!mutex) {
- if (GetLastError() != ERROR_FILE_NOT_FOUND)
- qErrnoWarning("QtLockedFile::lock(): OpenMutex failed");
- return 0;
- }
- }
- return mutex;
+ if (mutexname.isEmpty()) {
+ QFileInfo fi(*this);
+ mutexname = QString::fromLatin1(MUTEX_PREFIX)
+ + fi.absoluteFilePath().toLower();
+ }
+ QString mname(mutexname);
+ if (idx >= 0)
+ mname += QString::number(idx);
+
+ Qt::HANDLE mutex;
+ if (doCreate) {
+ mutex = CreateMutexW(NULL, FALSE, (LPCWSTR)mname.utf16());
+ if (!mutex) {
+ qErrnoWarning("QtLockedFile::lock(): CreateMutex failed");
+ return 0;
+ }
+ }
+ else {
+ mutex = OpenMutexW(SYNCHRONIZE | MUTEX_MODIFY_STATE, FALSE, (LPCWSTR)mname.utf16());
+ if (!mutex) {
+ if (GetLastError() != ERROR_FILE_NOT_FOUND)
+ qErrnoWarning("QtLockedFile::lock(): OpenMutex failed");
+ return 0;
+ }
+ }
+ return mutex;
}
bool LockedFile::waitMutex(Qt::HANDLE mutex, bool doBlock)
{
- Q_ASSERT(mutex);
- DWORD res = WaitForSingleObject(mutex, doBlock ? INFINITE : 0);
- switch (res) {
- case WAIT_OBJECT_0:
- case WAIT_ABANDONED:
- return true;
- break;
- case WAIT_TIMEOUT:
- break;
- default:
- qErrnoWarning("QtLockedFile::lock(): WaitForSingleObject failed");
- }
- return false;
+ Q_ASSERT(mutex);
+ DWORD res = WaitForSingleObject(mutex, doBlock ? INFINITE : 0);
+ switch (res) {
+ case WAIT_OBJECT_0:
+ case WAIT_ABANDONED:
+ return true;
+ break;
+ case WAIT_TIMEOUT:
+ break;
+ default:
+ qErrnoWarning("QtLockedFile::lock(): WaitForSingleObject failed");
+ }
+ return false;
}
bool LockedFile::lock(LockMode mode, bool block)
{
- if (!isOpen()) {
- qWarning("QtLockedFile::lock(): file is not opened");
- return false;
- }
-
- if (mode == NoLock)
- return unlock();
-
- if (mode == m_lock_mode)
- return true;
-
- if (m_lock_mode != NoLock)
- unlock();
-
- if (!wmutex && !(wmutex = getMutexHandle(-1, true)))
- return false;
-
- if (!waitMutex(wmutex, block))
- return false;
-
- if (mode == ReadLock) {
- int idx = 0;
- for (; idx < MAX_READERS; idx++) {
- rmutex = getMutexHandle(idx, false);
- if (!rmutex || waitMutex(rmutex, false))
- break;
- CloseHandle(rmutex);
- }
- bool ok = true;
- if (idx >= MAX_READERS) {
- qWarning("QtLockedFile::lock(): too many readers");
- rmutex = 0;
- ok = false;
- }
- else if (!rmutex) {
- rmutex = getMutexHandle(idx, true);
- if (!rmutex || !waitMutex(rmutex, false))
- ok = false;
- }
- if (!ok && rmutex) {
- CloseHandle(rmutex);
- rmutex = 0;
- }
- ReleaseMutex(wmutex);
- if (!ok)
- return false;
- }
- else {
- Q_ASSERT(rmutexes.isEmpty());
- for (int i = 0; i < MAX_READERS; i++) {
- Qt::HANDLE mutex = getMutexHandle(i, false);
- if (mutex)
- rmutexes.append(mutex);
- }
- if (rmutexes.size()) {
- DWORD res = WaitForMultipleObjects(rmutexes.size(), rmutexes.constData(),
- TRUE, block ? INFINITE : 0);
- if (res != WAIT_OBJECT_0 && res != WAIT_ABANDONED) {
- if (res != WAIT_TIMEOUT)
- qErrnoWarning("QtLockedFile::lock(): WaitForMultipleObjects failed");
- m_lock_mode = WriteLock; // trick unlock() to clean up - semiyucky
- unlock();
- return false;
- }
- }
- }
-
- m_lock_mode = mode;
- return true;
+ if (!isOpen()) {
+ qWarning("QtLockedFile::lock(): file is not opened");
+ return false;
+ }
+
+ if (mode == NoLock)
+ return unlock();
+
+ if (mode == m_lock_mode)
+ return true;
+
+ if (m_lock_mode != NoLock)
+ unlock();
+
+ if (!wmutex && !(wmutex = getMutexHandle(-1, true)))
+ return false;
+
+ if (!waitMutex(wmutex, block))
+ return false;
+
+ if (mode == ReadLock) {
+ int idx = 0;
+ for (; idx < MAX_READERS; idx++) {
+ rmutex = getMutexHandle(idx, false);
+ if (!rmutex || waitMutex(rmutex, false))
+ break;
+ CloseHandle(rmutex);
+ }
+ bool ok = true;
+ if (idx >= MAX_READERS) {
+ qWarning("QtLockedFile::lock(): too many readers");
+ rmutex = 0;
+ ok = false;
+ }
+ else if (!rmutex) {
+ rmutex = getMutexHandle(idx, true);
+ if (!rmutex || !waitMutex(rmutex, false))
+ ok = false;
+ }
+ if (!ok && rmutex) {
+ CloseHandle(rmutex);
+ rmutex = 0;
+ }
+ ReleaseMutex(wmutex);
+ if (!ok)
+ return false;
+ }
+ else {
+ Q_ASSERT(rmutexes.isEmpty());
+ for (int i = 0; i < MAX_READERS; i++) {
+ Qt::HANDLE mutex = getMutexHandle(i, false);
+ if (mutex)
+ rmutexes.append(mutex);
+ }
+ if (rmutexes.size()) {
+ DWORD res = WaitForMultipleObjects(rmutexes.size(), rmutexes.constData(),
+ TRUE, block ? INFINITE : 0);
+ if (res != WAIT_OBJECT_0 && res != WAIT_ABANDONED) {
+ if (res != WAIT_TIMEOUT)
+ qErrnoWarning("QtLockedFile::lock(): WaitForMultipleObjects failed");
+ m_lock_mode = WriteLock; // trick unlock() to clean up - semiyucky
+ unlock();
+ return false;
+ }
+ }
+ }
+
+ m_lock_mode = mode;
+ return true;
}
bool LockedFile::unlock()
{
- if (!isOpen()) {
- qWarning("QtLockedFile::unlock(): file is not opened");
- return false;
- }
-
- if (!isLocked())
- return true;
-
- if (m_lock_mode == ReadLock) {
- ReleaseMutex(rmutex);
- CloseHandle(rmutex);
- rmutex = 0;
- }
- else {
- foreach(Qt::HANDLE mutex, rmutexes) {
- ReleaseMutex(mutex);
- CloseHandle(mutex);
- }
- rmutexes.clear();
- ReleaseMutex(wmutex);
- }
-
- m_lock_mode = LockedFile::NoLock;
- return true;
+ if (!isOpen()) {
+ qWarning("QtLockedFile::unlock(): file is not opened");
+ return false;
+ }
+
+ if (!isLocked())
+ return true;
+
+ if (m_lock_mode == ReadLock) {
+ ReleaseMutex(rmutex);
+ CloseHandle(rmutex);
+ rmutex = 0;
+ }
+ else {
+ foreach(Qt::HANDLE mutex, rmutexes) {
+ ReleaseMutex(mutex);
+ CloseHandle(mutex);
+ }
+ rmutexes.clear();
+ ReleaseMutex(wmutex);
+ }
+
+ m_lock_mode = LockedFile::NoLock;
+ return true;
}
LockedFile::~LockedFile()
{
- if (isOpen())
- unlock();
- if (wmutex)
- CloseHandle(wmutex);
+ if (isOpen())
+ unlock();
+ if (wmutex)
+ CloseHandle(wmutex);
}