Re: Mutexes

[John Darrington]

On Sun, Apr 19, 2009 at 09:05:07PM -0700, Ben Pfaff wrote:
     John Darrington <address@hidden> writes:
     
     > On Sun, Apr 19, 2009 at 08:26:57PM -0700, Ben Pfaff wrote:
     >      John Darrington <address@hidden> writes:
     >      
     >      > Any objections if I check in some thread safety changes to the 
lower
     >      > levels, such as the attached patch ?
     >      >
     >      > I don't think there's going to be a multi-threaded pspp for 
production
     >      > use any time soon, but I've been doing some experiments in order 
to
     >      > find out what some of the issues are.
     >      
     >      Could we put this into a separate branch?  I'm nervous about
     >      adding unneeded dependencies.
     >
     > It doesn't need any additional dependencies, unless you count an extra
     > gnulib module as a dependency.
     
     Won't the gnulib module will cause our binaries to link against
     new libraries, e.g. libpthread on Linux?
     
     At any rate, this will change some very cheap operations, such as
     incrementing a value, into relatively expensive ones.

I thought they were supposed to do nothing if a thread library wasn't 
specified.

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