internal void MutexTryCode(object userData)
{
SafeWaitHandle mutexHandle = null;
// try block
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
if (m_initiallyOwned)
{
m_cleanupInfo.inCriticalRegion = true;
#if !FEATURE_CORECLR
Thread.BeginThreadAffinity();
Thread.BeginCriticalRegion();
#endif //!FEATURE_CORECLR
}
}
int errorCode = 0;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
errorCode = CreateMutexHandle(m_initiallyOwned, m_name, m_secAttrs, out mutexHandle);
}
if (mutexHandle.IsInvalid)
{
mutexHandle.SetHandleAsInvalid();
if (m_name != null)
{
switch (errorCode)
{
#if PLATFORM_UNIX
case Win32Native.ERROR_FILENAME_EXCED_RANGE:
// On Unix, length validation is done by CoreCLR's PAL after converting to utf-8
throw new ArgumentException(Environment.GetResourceString("Argument_WaitHandleNameTooLong", PathInternal.MaxComponentLength), "name");
#endif
case Win32Native.ERROR_INVALID_HANDLE:
throw new WaitHandleCannotBeOpenedException(Environment.GetResourceString("Threading.WaitHandleCannotBeOpenedException_InvalidHandle", m_name));
}
}
__Error.WinIOError(errorCode, m_name);
}
m_newMutex = errorCode != Win32Native.ERROR_ALREADY_EXISTS;
m_mutex.SetHandleInternal(mutexHandle);
m_mutex.hasThreadAffinity = true;
}
private static int CreateMutexHandle(bool initiallyOwned, string name, Win32Native.SECURITY_ATTRIBUTES securityAttribute, out SafeWaitHandle mutexHandle)
{
bool bHandleObtained = false;
bool flag2 = false;
Label_0004:
mutexHandle = Win32Native.CreateMutex(securityAttribute, initiallyOwned, name);
int num = Marshal.GetLastWin32Error();
if (mutexHandle.IsInvalid && (num == 5))
{
RuntimeHelpers.PrepareConstrainedRegions();
try
{
try
{
}
finally
{
Thread.BeginThreadAffinity();
flag2 = true;
}
AcquireReservedMutex(ref bHandleObtained);
mutexHandle = Win32Native.OpenMutex(0x100001, false, name);
if (!mutexHandle.IsInvalid)
{
num = 0xb7;
}
else
{
num = Marshal.GetLastWin32Error();
}
}
finally
{
if (bHandleObtained)
{
ReleaseReservedMutex();
}
if (flag2)
{
Thread.EndThreadAffinity();
}
}
switch (num)
{
case 2:
goto Label_0004;
case 0:
return(0xb7);
}
}
return(num);
}
public Mutex(bool initiallyOwned, String name, out bool createdNew)
{
if (null != name && System.IO.Path.MAX_PATH < name.Length)
{
throw new ArgumentException(Environment.GetResourceString("Argument_WaitHandleNameTooLong", name));
}
Win32Native.SECURITY_ATTRIBUTES secAttrs = null;
SafeWaitHandle mutexHandle = null;
bool newMutex = false;
RuntimeHelpers.CleanupCode cleanupCode = new RuntimeHelpers.CleanupCode(MutexCleanupCode);
MutexCleanupInfo cleanupInfo = new MutexCleanupInfo(mutexHandle, false);
RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(
delegate(object userData) { // try block
RuntimeHelpers.PrepareConstrainedRegions();
try {
}
finally {
if (initiallyOwned)
{
cleanupInfo.inCriticalRegion = true;
Thread.BeginThreadAffinity();
Thread.BeginCriticalRegion();
}
}
int errorCode = 0;
RuntimeHelpers.PrepareConstrainedRegions();
try {
}
finally {
errorCode = CreateMutexHandle(initiallyOwned, name, secAttrs, out mutexHandle);
}
if (mutexHandle.IsInvalid)
{
mutexHandle.SetHandleAsInvalid();
if (null != name && 0 != name.Length && Win32Native.ERROR_INVALID_HANDLE == errorCode)
{
throw new WaitHandleCannotBeOpenedException(Environment.GetResourceString("Threading.WaitHandleCannotBeOpenedException_InvalidHandle", name));
}
__Error.WinIOError(errorCode, name);
}
newMutex = errorCode != Win32Native.ERROR_ALREADY_EXISTS;
SetHandleInternal(mutexHandle);
mutexHandle.SetAsMutex();
hasThreadAffinity = true;
},
cleanupCode,
cleanupInfo);
createdNew = newMutex;
}
private static int CreateMutexHandle(bool initiallyOwned, string name, Win32Native.SECURITY_ATTRIBUTES securityAttribute, out SafeWaitHandle mutexHandle)
{
bool flag = false;
int num;
do
{
mutexHandle = Win32Native.CreateMutex(securityAttribute, initiallyOwned, name);
num = Marshal.GetLastWin32Error();
if (!mutexHandle.IsInvalid || num != 5)
{
return(num);
}
RuntimeHelpers.PrepareConstrainedRegions();
try
{
try
{
}
finally
{
Thread.BeginThreadAffinity();
flag = true;
}
mutexHandle = Win32Native.OpenMutex(1048577, false, name);
if (!mutexHandle.IsInvalid)
{
num = 183;
}
else
{
num = Marshal.GetLastWin32Error();
}
}
finally
{
if (flag)
{
Thread.EndThreadAffinity();
}
}
}while (num == 2);
if (num == 0)
{
num = 183;
}
return(num);
}
internal void MutexTryCode(object userData)
{
SafeWaitHandle mutexHandle = null;
// try block
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
if (m_initiallyOwned)
{
m_cleanupInfo.inCriticalRegion = true;
#if !FEATURE_CORECLR
Thread.BeginThreadAffinity();
Thread.BeginCriticalRegion();
#endif //!FEATURE_CORECLR
}
}
int errorCode = 0;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
errorCode = CreateMutexHandle(m_initiallyOwned, m_name, m_secAttrs, out mutexHandle);
}
if (mutexHandle.IsInvalid)
{
mutexHandle.SetHandleAsInvalid();
if (null != m_name && 0 != m_name.Length && Win32Native.ERROR_INVALID_HANDLE == errorCode)
{
throw new WaitHandleCannotBeOpenedException(Environment.GetResourceString("Threading.WaitHandleCannotBeOpenedException_InvalidHandle", m_name));
}
__Error.WinIOError(errorCode, m_name);
}
m_newMutex = errorCode != Win32Native.ERROR_ALREADY_EXISTS;
m_mutex.SetHandleInternal(mutexHandle);
mutexHandle.SetAsMutex();
m_mutex.hasThreadAffinity = true;
}
internal void MutexTryCode(object userData)
{
SafeWaitHandle safeWaitHandle = null;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
if (this.m_initiallyOwned)
{
this.m_cleanupInfo.inCriticalRegion = true;
Thread.BeginThreadAffinity();
Thread.BeginCriticalRegion();
}
}
int num = 0;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
num = Mutex.CreateMutexHandle(this.m_initiallyOwned, this.m_name, this.m_secAttrs, out safeWaitHandle);
}
if (safeWaitHandle.IsInvalid)
{
safeWaitHandle.SetHandleAsInvalid();
if (this.m_name != null && this.m_name.Length != 0 && 6 == num)
{
throw new WaitHandleCannotBeOpenedException(Environment.GetResourceString("Threading.WaitHandleCannotBeOpenedException_InvalidHandle", new object[]
{
this.m_name
}));
}
__Error.WinIOError(num, this.m_name);
}
this.m_newMutex = (num != 183);
this.m_mutex.SetHandleInternal(safeWaitHandle);
this.m_mutex.hasThreadAffinity = true;
}
public static CancellationRegion SetNonCancelable()
{
CancellationSignal signal = new CancellationSignal(false);
Thread t = Thread.CurrentThread;
signal.Thread = t;
List <CancellationSignal> signals = t.CancellationSignals;
CancellationRegion region = new CancellationRegion(signal);
lock (signals) {
signals.Add(signal);
// Note that all failures due to allocations will be above
// this point in this method. Also, note that it's fine to
// Add first then get thread affinity later - the Cancel
// method holds this same lock while cancelling.
// Ensure that another fiber cannot run on this thread.
Thread.BeginThreadAffinity();
}
return(region);
}
static int CreateMutexHandle(bool initiallyOwned, String name, Win32Native.SECURITY_ATTRIBUTES securityAttribute, out SafeWaitHandle mutexHandle)
{
int errorCode;
bool fAffinity = false;
while (true)
{
mutexHandle = Win32Native.CreateMutex(securityAttribute, initiallyOwned, name);
errorCode = Marshal.GetLastWin32Error();
if (!mutexHandle.IsInvalid)
{
break;
}
if (errorCode == Win32Native.ERROR_ACCESS_DENIED)
{
// If a mutex with the name already exists, OS will try to open it with FullAccess.
// It might fail if we don't have enough access. In that case, we try to open the mutex will modify and synchronize access.
//
RuntimeHelpers.PrepareConstrainedRegions();
try
{
try
{
}
finally
{
#if !FEATURE_CORECLR
Thread.BeginThreadAffinity();
#endif
fAffinity = true;
}
mutexHandle = Win32Native.OpenMutex(Win32Native.MUTEX_MODIFY_STATE | Win32Native.SYNCHRONIZE, false, name);
if (!mutexHandle.IsInvalid)
{
errorCode = Win32Native.ERROR_ALREADY_EXISTS;
}
else
{
errorCode = Marshal.GetLastWin32Error();
}
}
finally
{
if (fAffinity)
{
#if !FEATURE_CORECLR
Thread.EndThreadAffinity();
#endif
}
}
// There could be a ---- here, the other owner of the mutex can free the mutex,
// We need to retry creation in that case.
if (errorCode != Win32Native.ERROR_FILE_NOT_FOUND)
{
if (errorCode == Win32Native.ERROR_SUCCESS)
{
errorCode = Win32Native.ERROR_ALREADY_EXISTS;
}
break;
}
}
else
{
break;
}
}
return(errorCode);
}
public IoBackgroundModeToken()
{
Thread.BeginThreadAffinity();
NativeMethods.EnterBackgroundMode();
}
public unsafe Mutex(bool initiallyOwned, string name, out bool createdNew, MutexSecurity mutexSecurity)
{
if ((name != null) && (260 < name.Length))
{
throw new ArgumentException(Environment.GetResourceString("Argument_WaitHandleNameTooLong", new object[] { name }));
}
Win32Native.SECURITY_ATTRIBUTES secAttrs = null;
if (mutexSecurity != null)
{
secAttrs = new Win32Native.SECURITY_ATTRIBUTES {
nLength = Marshal.SizeOf(secAttrs)
};
byte[] securityDescriptorBinaryForm = mutexSecurity.GetSecurityDescriptorBinaryForm();
byte * pDest = stackalloc byte[1 * securityDescriptorBinaryForm.Length];
Buffer.memcpy(securityDescriptorBinaryForm, 0, pDest, 0, securityDescriptorBinaryForm.Length);
secAttrs.pSecurityDescriptor = pDest;
}
SafeWaitHandle mutexHandle = null;
bool newMutex = false;
RuntimeHelpers.CleanupCode backoutCode = new RuntimeHelpers.CleanupCode(this.MutexCleanupCode);
MutexCleanupInfo cleanupInfo = new MutexCleanupInfo(mutexHandle, false);
RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(delegate(object userData) {
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
if (initiallyOwned)
{
cleanupInfo.inCriticalRegion = true;
Thread.BeginThreadAffinity();
Thread.BeginCriticalRegion();
}
}
int errorCode = 0;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
errorCode = CreateMutexHandle(initiallyOwned, name, secAttrs, out mutexHandle);
}
if (mutexHandle.IsInvalid)
{
mutexHandle.SetHandleAsInvalid();
if (((name != null) && (name.Length != 0)) && (6 == errorCode))
{
throw new WaitHandleCannotBeOpenedException(Environment.GetResourceString("Threading.WaitHandleCannotBeOpenedException_InvalidHandle", new object[] { name }));
}
__Error.WinIOError(errorCode, name);
}
newMutex = errorCode != 0xb7;
this.SetHandleInternal(mutexHandle);
this.hasThreadAffinity = true;
}, backoutCode, cleanupInfo);
createdNew = newMutex;
}
private static int CreateMutexHandle(bool initiallyOwned, string name, Win32Native.SECURITY_ATTRIBUTES securityAttribute, out SafeWaitHandle mutexHandle)
{
bool flag = false;
bool flag2 = false;
bool flag3 = false;
Label_0006:
flag2 = false;
flag3 = false;
mutexHandle = Win32Native.CreateMutex(securityAttribute, initiallyOwned, name);
int num = Marshal.GetLastWin32Error();
if (!mutexHandle.IsInvalid || (num != 5))
{
return(num);
}
RuntimeHelpers.PrepareConstrainedRegions();
try
{
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
Thread.BeginThreadAffinity();
flag = true;
}
mutexHandle = Win32Native.OpenMutex(0x100001, false, name);
if (!mutexHandle.IsInvalid)
{
num = 0xb7;
if (Environment.IsW2k3)
{
SafeWaitHandle handle = Win32Native.OpenMutex(0x100001, false, name);
if (!handle.IsInvalid)
{
RuntimeHelpers.PrepareConstrainedRegions();
try
{
uint num2 = 0;
IntPtr ptr = mutexHandle.DangerousGetHandle();
IntPtr ptr2 = handle.DangerousGetHandle();
IntPtr[] handles = new IntPtr[] { ptr, ptr2 };
num2 = Win32Native.WaitForMultipleObjects(2, handles, true, 0);
GC.KeepAlive(handles);
if (num2 == uint.MaxValue)
{
if (Marshal.GetLastWin32Error() != 0x57)
{
mutexHandle.Dispose();
flag3 = true;
}
}
else
{
flag2 = true;
if ((num2 >= 0) && (num2 < 2))
{
Win32Native.ReleaseMutex(mutexHandle);
Win32Native.ReleaseMutex(handle);
}
else if ((num2 >= 0x80) && (num2 < 130))
{
Win32Native.ReleaseMutex(mutexHandle);
Win32Native.ReleaseMutex(handle);
}
mutexHandle.Dispose();
}
goto Label_0166;
}
finally
{
handle.Dispose();
}
}
mutexHandle.Dispose();
flag3 = true;
}
}
else
{
num = Marshal.GetLastWin32Error();
}
}
finally
{
if (flag)
{
Thread.EndThreadAffinity();
}
}
Label_0166:
if ((flag2 || flag3) || (num == 2))
{
goto Label_0006;
}
if (num == 0)
{
num = 0xb7;
}
return(num);
}
