On 10 May 2012 15:03, K. Frank wrote: > > Neither of these shows --enable-threads of any flavor (in gcc -v), but both > show "Thread model: win32" in the gcc -v output.
Yep, if you don't explicitly configure with --enable-threads then the configure script picks a suitable default, which is "win32" on Windows. >> If you use GCC built with --enable-threads=posix then you shouldn't >> need to implement <thread>, it should be provided. > > No, this is not strictly true. Prior to Kai's winpthread implementation > and Ruben's <thread>-enabled build (or the tweaks I made to get > <thread> working), building a windows version of gcc with > --enable-threads=posix won't, in and of itself, give you a working > <thread>. One reason, among others, is that the posix version of > gcc's <thread> relies on the pthreads thread handle being a primitive > integral type. This is not required by the posix standard, but is how > unix / linux pthreads has historically been implemented. However, > pthreads-w32 uses (a pointer to) a struct as its thread handle, Yes, I don't think we have an open bugzilla report about that portability problem, but it's a known issue. > So you either need a little tweak to accommodate this handle > difference, or follow Kai's approach of providing a windows version > of pthreads that uses an integral thread handle (winpthreads). Have those changes come back upstream? It sounds as though they should do. >> The code is all open source, feel free to read it. > > Yes, of course, as a last resort. But it's generally not my first choice. > (By way of analogy, I find it more practical to read the c++11 standard > for <thread>, or ask questions in the c++ news group, rather than read > the gcc source code for <thread>.) That makes sense for <thread> because the standard is the authoritative source. For GCC's configuration the GCC sources are the authoritative source :-) Sorry if my last mail seemed impatient, I do appreciate your feedback based on your own experience of implementing <thread>. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Mingw-w64-public mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
