internal void SendRequestAndWait(RemoteCall rc)
{
Debug.Assert(!rc.returnImmediately);
lock (rc) {
if (ShuttingDown || connectionLostException != null)
{
return;
}
newCalls.Add(rc);
Write(rc.WriteRequest);
Monitor.Wait(rc);
}
while (rc.nextCall != null)
{
var nextCall = rc.nextCall;
rc.nextCall = null;
nextCall.Execute(this);
lock (rc) {
if (!nextCall.returnImmediately)
{
Write(nextCall.WriteResponse);
}
Monitor.Wait(rc);
}
}
}
internal void Push(RemoteCall call)
{
lock(stacks) {
Stack<RemoteCall> stack;
if(!stacks.TryGetValue(call.localThreadId, out stack)) {
stack = new Stack<RemoteCall>();
stacks.Add(call.localThreadId, stack);
}
stack.Push(call);
}
}
internal void Push(RemoteCall call)
{
lock (stacks) {
Stack <RemoteCall> stack;
if (!stacks.TryGetValue(call.localThreadId, out stack))
{
stack = new Stack <RemoteCall>();
stacks.Add(call.localThreadId, stack);
}
stack.Push(call);
}
}
internal void RequestExecution(RemoteConnection connection)
{
if (CfxRemoteCallContext.IsInContext && CfxRemoteCallContext.CurrentContext.connection != connection)
{
// The thread is in a remote call context, but the requestor wants to call
// on another connection. This can happen if a CfrObject method from one connection
// is used within the scope of a callback from another connection.
// In this case, the call has to be made in a temporary context with remote thread id zero.
var ctx = new CfxRemoteCallContext(connection, 0);
ctx.Enter();
try {
RequestExecution(connection);
} finally {
ctx.Exit();
}
return;
}
if (returnImmediately)
{
if (connection.ShuttingDown)
{
return;
}
else if (connection.connectionLostException != null)
{
throw new CfxRemotingException("Remote connection lost.", connection.connectionLostException);
}
connection.Write(WriteRequest);
return;
}
lock (waitLock) {
// The lock must begin here. Otherwise,
// there is a race between Wait and PulseAll
// causing this thread to wait forever
// under some circumstances.
localThreadId = System.Threading.Thread.CurrentThread.ManagedThreadId;
connection.callStack.Push(this);
remoteThreadId = CfxRemoteCallContext.currentThreadId;
connection.Write(WriteRequest);
for (; ;)
{
if (responseReceived)
{
Debug.Assert(reentryCall == null);
return;
}
if (this.reentryCall != null)
{
reentryCall.ExecutionThreadEntry(connection);
reentryCall = null;
}
if (!connection.ShuttingDown && connection.connectionLostException == null)
{
System.Threading.Monitor.Wait(waitLock);
}
if (connection.ShuttingDown)
{
return;
}
else if (connection.connectionLostException != null)
{
if (RemoteClient.connection != null)
{
// this is the render process calling back into the browser process
// reaching this point usually means the browser process crashed or was killed
// don't throw, just return so the process can exit gracefully
return;
}
throw new CfxRemotingException("Remote connection lost.", connection.connectionLostException);
}
}
}
}
internal void RequestExecution(RemoteConnection connection)
{
if(CfxRemoteCallContext.IsInContext && CfxRemoteCallContext.CurrentContext.connection != connection) {
// The thread is in a remote call context, but the requestor wants to call
// on another connection. This can happen if a CfrObject method from one connection
// is used within the scope of a callback from another connection.
// In this case, the call has to be made in a temporary context with remote thread id zero.
var ctx = new CfxRemoteCallContext(connection, 0);
ctx.Enter();
try {
RequestExecution(connection);
} finally {
ctx.Exit();
}
return;
}
if(returnImmediately) {
if(connection.ShuttingDown)
return;
else if(connection.connectionLostException != null)
throw new CfxRemotingException("Remote connection lost.", connection.connectionLostException);
connection.EnqueueWrite(WriteRequest);
return;
}
lock(waitLock) {
// The lock must begin here. Otherwise,
// there is a race between Wait and PulseAll
// causing this thread to wait forever
// under some circumstances.
localThreadId = System.Threading.Thread.CurrentThread.ManagedThreadId;
connection.callStack.Push(this);
remoteThreadId = CfxRemoteCallContext.currentThreadId;
connection.EnqueueWrite(WriteRequest);
for(; ; ) {
if(responseReceived) {
Debug.Assert(reentryCall == null);
return;
}
if(this.reentryCall != null) {
reentryCall.ExecutionThreadEntry(connection);
reentryCall = null;
}
if(!connection.ShuttingDown && connection.connectionLostException == null)
System.Threading.Monitor.Wait(waitLock);
if(connection.ShuttingDown)
return;
else if(connection.connectionLostException != null) {
if(RemoteClient.connection != null) {
// this is the render process calling back into the browser process
// reaching this point usually means the browser process crashed or was killed
// don't throw, just return so the process can exit gracefully
return;
}
throw new CfxRemotingException("Remote connection lost.", connection.connectionLostException);
}
}
}
}