#13554: Allow the user to provide a C function that is called on each thread the RTS creates before running any Haskell code -------------------------------------+------------------------------------- Reporter: dobenour | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: 8.4.1 Component: Runtime System | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): There is a bit of a tricky interface question here. It seems to me like allowing only one callback is insufficient. Afterall, what when you want to use both MySQL and libcurl? It seems that you really need the ability to register multiple callbacks for this to be robust. However, there is also the question of what the precise semantics of this callback are. Should it get called on threads which are pre-existing at time of callback registration? Does the callback get called in the context of each thread, or merely with its, e.g., `pid`? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13554#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler