/*!
\internal
Setup the semaphore
*/
HANDLE QSystemLockPrivate::handle()
{
// don't allow making handles on empty keys
if (key.isEmpty())
return 0;
// Create it if it doesn't already exists.
if (semaphore == 0) {
QString safeName = makeKeyFileName();
semaphore = CreateSemaphore(0, MAX_LOCKS, MAX_LOCKS, (wchar_t*)safeName.utf16());
if (semaphore == 0) {
setErrorString(QLatin1String("QSystemLockPrivate::handle"));
return 0;
}
}
if (semaphoreLock == 0) {
QString safeLockName = QSharedMemoryPrivate::makePlatformSafeKey(key + QLatin1String("lock"), QLatin1String("qipc_systemlock_"));
semaphoreLock = CreateSemaphore(0, 1, 1, (wchar_t*)safeLockName.utf16());
if (semaphoreLock == 0) {
setErrorString(QLatin1String("QSystemLockPrivate::handle"));
return 0;
}
}
return semaphore;
}
int QSystemSemaphorePrivate::handle(QSystemSemaphore::AccessMode)
{
if (semaphore.Handle()) {
return semaphore.Handle();
}
// don't allow making handles on empty keys
if (key.isEmpty())
return 0;
QString safeName = makeKeyFileName();
TPtrC name(qt_QString2TPtrC(safeName));
int err = KErrAlreadyExists;
int tryCount = 10;
// Sort out race conditions by retrying several times until existing handle is acquired.
// Sometimes opening can fail inexplicably with KErrPermissionDenied many times in a row.
while (err != KErrNoMemory && err != KErrNone && tryCount-- >= 0) {
err = semaphore.CreateGlobal(name, initialValue, EOwnerProcess);
if (err != KErrNoMemory && err != KErrNone)
err = semaphore.OpenGlobal(name,EOwnerProcess);
}
if (err){
setErrorString(QLatin1String("QSystemSemaphore::handle"),err);
return 0;
}
return semaphore.Handle();
}
/*!
\internal
Setup the semaphore
*/
HANDLE QSystemLockPrivate::handle()
{
// don't allow making handles on empty keys
if (key.isEmpty())
return 0;
// Create it if it doesn't already exists.
if (semaphore == 0) {
QString safeName = makeKeyFileName();
QT_WA({
semaphore = CreateSemaphoreW(0, MAX_LOCKS, MAX_LOCKS, (TCHAR*)safeName.utf16());
}, {
HANDLE QSystemSemaphorePrivate::handle(QSystemSemaphore::AccessMode)
{
// don't allow making handles on empty keys
if (key.isEmpty())
return 0;
// Create it if it doesn't already exists.
if (semaphore == 0) {
QString safeName = makeKeyFileName();
QT_WA({
semaphore = CreateSemaphoreW(0, initialValue, MAXLONG, (TCHAR*)safeName.utf16());
}, {
HANDLE QSystemSemaphorePrivate::handle(QSystemSemaphore::AccessMode)
{
// don't allow making handles on empty keys
if (key.isEmpty())
return 0;
// Create it if it doesn't already exists.
if (semaphore == 0) {
QString safeName = makeKeyFileName();
semaphore = CreateSemaphore(0, initialValue, MAXLONG, (wchar_t*)safeName.utf16());
if (semaphore == NULL)
setErrorString(QLatin1String("QSystemSemaphore::handle"));
}
return semaphore;
}