Owen Anderson resistor at mac.com
Mon Jun 15 18:16:49 PDT 2009

Hey folks,

As you may be aware if you've been watching llvm-commits, I've been  
working recently on improving the ability to use LLVM across multiple  
threads.  While the goal for now is to be able to hack on multiple  
Module's in parallel, this has necessitated a larger review of how  
LLVM interacts with threads.

In a recent(-ish) patch, I added a new API: llvm_start_multithreaded 
().  This API is used to initialize the thread-safety constructs that  
are going into LLVM.  I will be committing a detail update to the LLVM  
programmer's manual on how to use it.

The major CHANGE is:  the JIT will no longer be safe for executing  
threaded applications without first invoking llvm_start_multithreaded 
().  Please begin to update your client applications now if this  
affects you, as I will be throwing the switch in SVN sooner rather  
than later.



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