private void RenderProcessHandler_OnBrowserCreated(object sender, Chromium.Remote.Event.CfrOnBrowserCreatedEventArgs e)
{
var browserCore = BrowserCore.GetBrowserCore(e.Browser.Identifier);
if (browserCore != null)
{
var remoteProcess = browserCore.remoteProcess;
if (remoteProcess != null && remoteProcess != renderProcess)
{
CfxRemoteCallbackManager.SuspendCallbacks(renderProcess.RemoteProcessId);
}
browserCore.SetRemoteBrowser(e.Browser, renderProcess);
}
}
private void ExecutionThreadEntry(RemoteConnection connection)
{
if (returnImmediately)
{
// only happens in calls from the browser to the renderer
CfxDebug.Assert(connection == RemoteClient.connection);
ExecuteInTargetProcess(connection);
return;
}
if (RemoteClient.connection == null)
{
if (!CfxRemoteCallbackManager.IncrementCallbackCount(connection.remoteProcessId))
{
// The application has suspended remote callbacks.
// Write the response without ececuting event handlers, returning default values.
connection.EnqueueWrite(WriteResponse);
return;
}
}
var threadContext = new CfxRemoteCallContext(connection, remoteThreadId);
threadContext.Enter();
var threadStackCount = CfxRemoteCallContext.ContextStackCount;
try {
ExecuteInTargetProcess(connection);
} finally {
if (RemoteClient.connection == null)
{
CfxRemoteCallbackManager.DecrementCallbackCount(connection.remoteProcessId);
}
if (threadStackCount != CfxRemoteCallContext.ContextStackCount || CfxRemoteCallContext.CurrentContext != threadContext)
{
CfxRemoteCallContext.resetStack(threadStackCount - 1);
throw new CfxException("Unbalanced remote call context stack. Make sure to balance calls to CfxRemoteCallContext.Enter() and CfxRemoteCallContext.Exit() in all render process callback events.");
}
threadContext.Exit();
}
connection.EnqueueWrite(WriteResponse);
}
/// <summary>
/// Prepares and executes the remote procedure in the remote process
/// </summary>
internal void Execute(RemoteConnection connection)
{
if (returnImmediately)
{
RemoteProcedure();
return;
}
if (RemoteClient.connection == null)
{
if (!CfxRemoteCallbackManager.IncrementCallbackCount(connection.remoteProcessId))
{
// The application has suspended remote callbacks.
// Return without ececuting event handlers, connection will return default values.
return;
}
}
var threadContext = new CfxRemoteCallContext(connection, remoteThreadId);
threadContext.Enter();
var threadStackCount = CfxRemoteCallContext.ContextStackCount;
try {
RemoteProcedure();
} finally {
if (RemoteClient.connection == null)
{
CfxRemoteCallbackManager.DecrementCallbackCount(connection.remoteProcessId);
}
if (threadStackCount != CfxRemoteCallContext.ContextStackCount || CfxRemoteCallContext.CurrentContext != threadContext)
{
CfxRemoteCallContext.resetStack(threadStackCount - 1);
throw new CfxException("Unbalanced remote call context stack. Make sure to balance calls to CfxRemoteCallContext.Enter() and CfxRemoteCallContext.Exit() in all render process callback events.");
}
threadContext.Exit();
}
}
void RenderProcessHandler_OnBrowserCreated(object sender, CfrOnBrowserCreatedEventArgs e)
{
var id = e.Browser.Identifier;
var wb = HtmlUILauncher.GetBrowser(id);
if (wb != null)
{
var rp = wb.RemoteProcess;
if (rp != null && rp != this.remoteProcess)
{
// A new process has been created for the browser.
// The old process is still alive, but probably it gets
// killed soon after this callback returns.
// So we suspend all callbacks from the old process.
// If there are currently executing callbacks,
// this call will block until they are finished.
// When this call returns, it should be safe to
// continue execution and let the old process die.
CfxRemoteCallbackManager.SuspendCallbacks(rp.RemoteProcessId);
}
wb.SetRemoteBrowser(e.Browser, remoteProcess);
}
}
