multithreading_support(3) on Linux
The text 4ff87c52315d, as Debian 6.0 (Squeeze) shipped it.
Multithreading Support in Coin The support in Coin for using multiple threads in application programs and the Coin library itself, consists of two main features: The classes in question are SbThread, SbMutex, SbStorage, SbBarrier, SbCondVar, SbFifo, SbThreadAutoLock, SbRWMutex, and SbTypedStorage. See their respective documentation for the detailed information. The classes fully hides the system-specific implementation, which is either done on top of native Win32 (if on Microsoft Windows), or over POSIX threads (on UNIX and UNIX-like systems). Thread-safe render traversals are off by default, because there is a small overhead involved which would make rendering (very) slightly slower on single-threaded invocations. To get a Coin library built with thread-safe rendering, one must actively re-configure Coin and build a special, local version. For configure-based builds (UNIX and UNIX-like systems, or with Cygwin on Microsoft Windows) this is done with the option '--enable-threadsafe' to Autoconf configure. For how to change the configuration and re-build with Visual Studio, get in touch with us at '[email protected]'. There are some restrictions and other issues which it is important to be aware of: We are aware of at least issues with Qt (and thereby SoQt), where you should not modify the scene graph in any way in a thread separate from the main Qt thread. This because it will trigger operations where Qt is not thread-safe. Since: