From: Anthony Williams (anthony_w.geo_at_[hidden])
Date: 2007-05-22 07:06:23
"Johan Nilsson" <r.johan.nilsson_at_[hidden]> writes:
> Anthony Williams wrote:
>> Thomas Witt <witt_at_[hidden]> writes:
>>> Any input on this one. Seems like too complicated a fix for 1.34.1
>> I believe the patch below will fix Johan's immediate problems; I
>> would be grateful if he could try it.
> There was a typo at (patched) line 82: "#if define(BOOST_HAS_WINTHREADS)"
> instead of "#if defined(BOOST_HAS_WINTHREADS)".
Oops. Thanks for spotting it.
> IIRC we earlier discussed checking for a valid TSS index before calling
> TlsSetValue when in the cleanup_slots context.
That was when you suggested calling TlsSetValue *after* cleanup slots --- at
which point the TSS index may not be valid. In cleanup_slots (where it is now)
it is always valid, so we don't need the check.
> Further, I'd suggest statically initializing tss_data_native_key to
> 0xFFFFFFFF instead of having it zero initialized.
> The attached patch file (against RC_1_34_0) has these things
> fixed/added. Please review. I've applied the patch and successfully run all
> tests under libs/thread/test for current RC_1_34_0 under WinXP SP2 (SMP +
> HT). My own tests also keep running successfully with the patch applied.
> Even though the patch "couldn't possibly" have any effects under non-windows
> platforms I also applied the patch and ran the tests under OpenSUSE 10.2
> using gcc 4.1.2.
Thanks for doing this.
> Adding a named constant instead of hardcoding 0xFFFFFFFF all over the place
> would also be great. However, as I believe this is the last Boost release
> containing the "original" thread code I guess the point is moot?
Actually, this is TLS_OUT_OF_INDEXES (the return value from TlsAlloc if
there's not a free slot), so I've replaced it with that constant.
> [A bit off-topic] Is it intentional to have the 1.34.1 updates go under the
> RC_1_34_0 branch?
Attached is a revised patch.
-- Anthony Williams Just Software Solutions Ltd - http://www.justsoftwaresolutions.co.uk Registered in England, Company Number 5478976. Registered Office: 15 Carrallack Mews, St Just, Cornwall, TR19 7UL Index: tss.cpp =================================================================== RCS file: /cvsroot/boost/boost/libs/thread/src/tss.cpp,v retrieving revision 126.96.36.199 diff -u -r188.8.131.52 tss.cpp --- tss.cpp 1 Oct 2006 12:57:18 -0000 184.108.40.206 +++ tss.cpp 22 May 2007 10:55:06 -0000 @@ -31,7 +31,7 @@ boost::mutex* tss_data_mutex = 0; tss_data_cleanup_handlers_type* tss_data_cleanup_handlers = 0; #if defined(BOOST_HAS_WINTHREADS) - DWORD tss_data_native_key; + DWORD tss_data_native_key=TLS_OUT_OF_INDEXES; #elif defined(BOOST_HAS_PTHREADS) pthread_key_t tss_data_native_key; #elif defined(BOOST_HAS_MPTASKS) @@ -60,6 +60,7 @@ tss_data_mutex = 0; #if defined(BOOST_HAS_WINTHREADS) TlsFree(tss_data_native_key); + tss_data_native_key=TLS_OUT_OF_INDEXES; #elif defined(BOOST_HAS_PTHREADS) pthread_key_delete(tss_data_native_key); #elif defined(BOOST_HAS_MPTASKS) @@ -78,6 +79,9 @@ (*(*tss_data_cleanup_handlers)[i])((*slots)[i]); (*slots)[i] = 0; } +#if defined(BOOST_HAS_WINTHREADS) + TlsSetValue(tss_data_native_key,0); +#endif tss_data_dec_use(lock); delete slots; } @@ -97,7 +101,7 @@ //Allocate tls slot tss_data_native_key = TlsAlloc(); - if (tss_data_native_key == 0xFFFFFFFF) + if (tss_data_native_key == TLS_OUT_OF_INDEXES) return; #elif defined(BOOST_HAS_PTHREADS) int res = pthread_key_create(&tss_data_native_key, &cleanup_slots);
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