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Now that the infrastructure of the Graphics subsystem is quite stable, it is time to try to fix a long-standing problem, which is the lack of locking on display connector devices. Reading and writing from multiple processes to a framebuffer controlled by the display connector is not a huge problem - it could be solved with POSIX locking. The real problem is some program that will try to do ioctl operations on a display connector without the WindowServer being aware of that which can lead to very bad situations, for example - assuming a framebuffer is encoded at a known resolution and certain display timings, but another process changed the ModeSetting of the display connector, leading to inconsistency on the properties of the current ModeSetting. To solve this, there's a new "master" ioctl to take "ownership" and another one to release that ownership of a display connector device. To ensure we will not hold a Process object forever just because it has an ownership over a display connector, we hold it with a weak reference, and if the process is gone, someone else can take an ownership. |
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| .. | ||
| AudioServer | ||
| ChessEngine | ||
| Clipboard | ||
| ConfigServer | ||
| CrashDaemon | ||
| DHCPClient | ||
| EchoServer | ||
| FileOperation | ||
| FileSystemAccessServer | ||
| ImageDecoder | ||
| InspectorServer | ||
| KeyboardPreferenceLoader | ||
| LaunchServer | ||
| LoginServer | ||
| LookupServer | ||
| NetworkServer | ||
| NotificationServer | ||
| RequestServer | ||
| SpiceAgent | ||
| SQLServer | ||
| SystemServer | ||
| Taskbar | ||
| TelnetServer | ||
| WebContent | ||
| WebServer | ||
| WebSocket | ||
| WindowServer | ||
| CMakeLists.txt | ||