unsafe int PeekLockCore(MsmqQueueHandle handle, MsmqInputMessage message, TimeSpan timeout)
{
int retCode = 0;
ITransaction internalTrans;
TimeoutHelper timeoutHelper = new TimeoutHelper(timeout);
IntPtr nativePropertiesPointer = message.Pin();
try
{
bool receivedMessage = false;
while (!receivedMessage)
{
retCode = UnsafeNativeMethods.MQBeginTransaction(out internalTrans);
if (retCode != 0)
{
return(retCode);
}
int timeoutInMilliseconds = TimeoutHelper.ToMilliseconds(timeoutHelper.RemainingTime());
// no timeout interval if timeout has been set to 0 otherwise a minimum of 100
int timeoutIntervalInMilliseconds = (timeoutInMilliseconds == 0) ? 0 : 100;
// receive until timeout but let go of receive lock for other contenders periodically
while (true)
{
lock (this.receiveLock)
{
retCode = UnsafeNativeMethods.MQReceiveMessage(handle.DangerousGetHandle(), timeoutIntervalInMilliseconds,
UnsafeNativeMethods.MQ_ACTION_RECEIVE, nativePropertiesPointer, null, IntPtr.Zero, IntPtr.Zero, internalTrans);
if (retCode == UnsafeNativeMethods.MQ_ERROR_IO_TIMEOUT)
{
// keep trying until we timeout
timeoutInMilliseconds = TimeoutHelper.ToMilliseconds(timeoutHelper.RemainingTime());
if (timeoutInMilliseconds == 0)
{
return(retCode);
}
}
else if (retCode != 0)
{
BOID boid = new BOID();
internalTrans.Abort(
ref boid, // pboidReason
0, // fRetaining
0 // fAsync
);
return(retCode);
// we don't need to release the ITransaction as MSMQ does not increment the ref counter
// in MQBeginTransaction
}
else
{
// we got a message within the specified time out
break;
}
}
}
TransactionLookupEntry entry;
lock (this.internalStateLock)
{
if (!this.lockMap.TryGetValue(message.LookupId.Value, out entry))
{
this.lockMap.Add(message.LookupId.Value, new TransactionLookupEntry(message.LookupId.Value, internalTrans));
receivedMessage = true;
}
else
{
// this was a message that was in the process of being handed off
// from some app trans to some internal MSMQ transaction
// and we grabbed it before the Abort() could finish
// need to be a good citizen and finish that Abort() job for it
entry.MsmqInternalTransaction = internalTrans;
}
}
}
}
finally
{
message.Unpin();
}
return(retCode);
}
unsafe int PeekLockCore(MsmqQueueHandle handle, MsmqInputMessage message, TimeSpan timeout)
{
int retCode = 0;
ITransaction internalTrans;
TimeoutHelper timeoutHelper = new TimeoutHelper(timeout);
IntPtr nativePropertiesPointer = message.Pin();
try
{
bool receivedMessage = false;
while (!receivedMessage)
{
retCode = UnsafeNativeMethods.MQBeginTransaction(out internalTrans);
if (retCode != 0)
{
return retCode;
}
int timeoutInMilliseconds = TimeoutHelper.ToMilliseconds(timeoutHelper.RemainingTime());
// no timeout interval if timeout has been set to 0 otherwise a minimum of 100
int timeoutIntervalInMilliseconds = (timeoutInMilliseconds == 0) ? 0 : 100;
// receive until timeout but let go of receive lock for other contenders periodically
while (true)
{
lock (this.receiveLock)
{
retCode = UnsafeNativeMethods.MQReceiveMessage(handle.DangerousGetHandle(), timeoutIntervalInMilliseconds,
UnsafeNativeMethods.MQ_ACTION_RECEIVE, nativePropertiesPointer, null, IntPtr.Zero, IntPtr.Zero, internalTrans);
if (retCode == UnsafeNativeMethods.MQ_ERROR_IO_TIMEOUT)
{
// keep trying until we timeout
timeoutInMilliseconds = TimeoutHelper.ToMilliseconds(timeoutHelper.RemainingTime());
if (timeoutInMilliseconds == 0)
{
return retCode;
}
}
else if (retCode != 0)
{
BOID boid = new BOID();
internalTrans.Abort(
ref boid, // pboidReason
0, // fRetaining
0 // fAsync
);
return retCode;
// we don't need to release the ITransaction as MSMQ does not increment the ref counter
// in MQBeginTransaction
}
else
{
// we got a message within the specified time out
break;
}
}
}
TransactionLookupEntry entry;
lock (this.internalStateLock)
{
if (!this.lockMap.TryGetValue(message.LookupId.Value, out entry))
{
this.lockMap.Add(message.LookupId.Value, new TransactionLookupEntry(message.LookupId.Value, internalTrans));
receivedMessage = true;
}
else
{
// this was a message that was in the process of being handed off
// from some app trans to some internal MSMQ transaction
// and we grabbed it before the Abort() could finish
// need to be a good citizen and finish that Abort() job for it
entry.MsmqInternalTransaction = internalTrans;
}
}
}
}
finally
{
message.Unpin();
}
return retCode;
}
private int PeekLockCore(MsmqQueueHandle handle, MsmqInputMessage message, TimeSpan timeout)
{
int num = 0;
TimeoutHelper helper = new TimeoutHelper(timeout);
IntPtr properties = message.Pin();
try
{
bool flag = false;
while (!flag)
{
ITransaction transaction;
bool flag2;
object obj2;
num = UnsafeNativeMethods.MQBeginTransaction(out transaction);
if (num != 0)
{
return(num);
}
int num3 = (TimeoutHelper.ToMilliseconds(helper.RemainingTime()) == 0) ? 0 : 100;
Label_0045:
flag2 = false;
try
{
Monitor.Enter(obj2 = this.receiveLock, ref flag2);
num = UnsafeNativeMethods.MQReceiveMessage(handle.DangerousGetHandle(), num3, 0, properties, null, IntPtr.Zero, IntPtr.Zero, transaction);
if (num == -1072824293)
{
if (TimeoutHelper.ToMilliseconds(helper.RemainingTime()) == 0)
{
return(num);
}
goto Label_0045;
}
if (num != 0)
{
BOID pboidReason = new BOID();
transaction.Abort(ref pboidReason, 0, 0);
return(num);
}
}
finally
{
if (flag2)
{
Monitor.Exit(obj2);
}
}
lock (this.internalStateLock)
{
TransactionLookupEntry entry;
if (!this.lockMap.TryGetValue(message.LookupId.Value, out entry))
{
this.lockMap.Add(message.LookupId.Value, new TransactionLookupEntry(message.LookupId.Value, transaction));
flag = true;
}
else
{
entry.MsmqInternalTransaction = transaction;
}
continue;
}
}
}
finally
{
message.Unpin();
}
return(num);
}
private int PeekLockCore(MsmqQueueHandle handle, MsmqInputMessage message, TimeSpan timeout)
{
int num = 0;
TimeoutHelper helper = new TimeoutHelper(timeout);
IntPtr properties = message.Pin();
try
{
bool flag = false;
while (!flag)
{
ITransaction transaction;
bool flag2;
object obj2;
num = UnsafeNativeMethods.MQBeginTransaction(out transaction);
if (num != 0)
{
return num;
}
int num3 = (TimeoutHelper.ToMilliseconds(helper.RemainingTime()) == 0) ? 0 : 100;
Label_0045:
flag2 = false;
try
{
Monitor.Enter(obj2 = this.receiveLock, ref flag2);
num = UnsafeNativeMethods.MQReceiveMessage(handle.DangerousGetHandle(), num3, 0, properties, null, IntPtr.Zero, IntPtr.Zero, transaction);
if (num == -1072824293)
{
if (TimeoutHelper.ToMilliseconds(helper.RemainingTime()) == 0)
{
return num;
}
goto Label_0045;
}
if (num != 0)
{
BOID pboidReason = new BOID();
transaction.Abort(ref pboidReason, 0, 0);
return num;
}
}
finally
{
if (flag2)
{
Monitor.Exit(obj2);
}
}
lock (this.internalStateLock)
{
TransactionLookupEntry entry;
if (!this.lockMap.TryGetValue(message.LookupId.Value, out entry))
{
this.lockMap.Add(message.LookupId.Value, new TransactionLookupEntry(message.LookupId.Value, transaction));
flag = true;
}
else
{
entry.MsmqInternalTransaction = transaction;
}
continue;
}
}
}
finally
{
message.Unpin();
}
return num;
}