Actually I just found this article: http://stackoverflow.com/questions/12166268/wheres-the-gil-in-pypy and it seems that the GIL is a feature specific to each interpreter. The link on that code lead me to module/thread/gil.py and that looks like it contains most of what I need.
Thanks! Timothy On Mon, Feb 24, 2014 at 1:41 PM, Timothy Baldridge <tbaldri...@gmail.com>wrote: > What's the best way to tell rpython not to release the GIL during a given > block of code? I haven't been able to find any code that describes when the > GIL is acquired or when control could switch over to another thread. I'd > prefer to have my interpreter bytecodes be atomic from the point of view > from the program. If I had that, then I could easily build a psudo > compare_and_swap by doing this: > > dont_release_gil() > if foo.bar == oldval: > foo.bar = newval > enable_gil_releasing() > > Thanks, > > Timothy > > > > > On Sat, Feb 22, 2014 at 12:13 AM, Armin Rigo <ar...@tunes.org> wrote: > >> Hi Timothy, >> >> On 22 February 2014 01:39, Timothy Baldridge <tbaldri...@gmail.com> >> wrote: >> > compare_and_swap(foo.bar, oldval, newval) >> >> At some point we added a way to do it (basically you can do it >> yourself, by writing a one-line function in C and calling it). We no >> longer do that: it's too much of a mess if you start having >> non-GIL-protected code written in RPython. Either you are extremely, >> extremely careful, or random things will explode. What we do instead, >> e.g. in the stm branches, is to write more C code. For the complete >> parts that really need to run without any GIL protection, C is better >> than RPython after all. >> >> >> A bientôt, >> >> Armin. >> > > > > -- > "One of the main causes of the fall of the Roman Empire was that-lacking > zero-they had no way to indicate successful termination of their C > programs." > (Robert Firth) > -- "One of the main causes of the fall of the Roman Empire was that-lacking zero-they had no way to indicate successful termination of their C programs." (Robert Firth)
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