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| author | Jason Merrill <jason@redhat.com> | 2004-12-27 23:36:54 -0500 |
|---|---|---|
| committer | Jason Merrill <jason@gcc.gnu.org> | 2004-12-27 23:36:54 -0500 |
| commit | 445cf5eb0d91d2aa401ff3907fcf993a44e4c8b4 (patch) | |
| tree | d723d1a31c0c3358f41a176191bde7ef4add806e /libstdc++-v3/ChangeLog | |
| parent | 1f7edb8b3d65da166df57999ae6053bfdbf939de (diff) | |
| download | gcc-445cf5eb0d91d2aa401ff3907fcf993a44e4c8b4.zip gcc-445cf5eb0d91d2aa401ff3907fcf993a44e4c8b4.tar.gz gcc-445cf5eb0d91d2aa401ff3907fcf993a44e4c8b4.tar.bz2 | |
Add memory barriers to the double-checked locking used for static initialization.
libstdc++:
Add memory barriers to the double-checked locking used for static
initialization.
* libsupc++/guard.cc (__test_and_acquire): Define default.
(_GLIBCXX_GUARD_TEST_AND_ACQUIRE, __set_and_release)
(_GLIBCXX_GUARD_SET_AND_RELEASE): Likewise.
(recursion_push, recursion_pop): New abstraction functions.
(__cxa_guard_acquire): Use _GLIBCXX_GUARD_TEST_AND_ACQUIRE.
(__cxa_guard_release): Use _GLIBCXX_GUARD_SET_AND_RELEASE.
* config/cpu/generic/cxxabi_tweaks.h (_GLIBCXX_GUARD_TEST): Rename
from _GLIBCXX_GUARD_ACQUIRE and reverse sense.
(_GLIBCXX_GUARD_SET): Rename from _GLIBCXX_GUARD_RELEASE.
* config/cpu/arm/cxxabi_tweaks.h: Likewise.
* config/cpu/alpha/atomic_word.h (_GLIBCXX_READ_MEM_BARRIER)
(_GLIBCXX_WRITE_MEM_BARRIER): Define.
* config/cpu/powerpc/atomic_word.h: Likewise.
* config/cpu/sparc/atomic_word.h: Likewise.
* config/cpu/generic/atomic_word.h: Define them, commented out.
* include/bits/atomicity.h: Define defaults.
* config/cpu/ia64/atomic_word.h (__test_and_acquire)
(__set_and_release): New inlines.
(_GLIBCXX_GUARD_TEST_AND_ACQUIRE): Define.
(_GLIBCXX_GUARD_SET_AND_RELEASE): Define.
* libsupc++/guard.cc (acquire_1): Use __builtin_trap instead of
abort();
gcc:
* doc/tm.texi (TARGET_RELAXED_ORDERING): Document.
* target.h (struct gcc_target): Add relaxed_ordering field.
* target-def.h (TARGET_RELAXED_ORDERING): Define default.
(TARGET_INITIALIZER): Add it.
* config/alpha/alpha.c (TARGET_RELAXED_ORDERING): Define.
* config/ia64/ia64.c (TARGET_RELAXED_ORDERING): Define.
* config/rs6000/rs6000.c (TARGET_RELAXED_ORDERING): Define.
* config/sparc/sparc.c (TARGET_RELAXED_ORDERING): Define.
* cp/decl.c (expand_static_init): Don't use shortcut if
targetm.relaxed_ordering.
From-SVN: r92659
Diffstat (limited to 'libstdc++-v3/ChangeLog')
| -rw-r--r-- | libstdc++-v3/ChangeLog | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index ba4b65e..da33b5d 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,3 +1,31 @@ +2004-12-27 Jason Merrill <jason@redhat.com> + + Add memory barriers to the double-checked locking used for static + initialization. + * libsupc++/guard.cc (__test_and_acquire): Define default. + (_GLIBCXX_GUARD_TEST_AND_ACQUIRE, __set_and_release) + (_GLIBCXX_GUARD_SET_AND_RELEASE): Likewise. + (recursion_push, recursion_pop): New abstraction functions. + (__cxa_guard_acquire): Use _GLIBCXX_GUARD_TEST_AND_ACQUIRE. + (__cxa_guard_release): Use _GLIBCXX_GUARD_SET_AND_RELEASE. + * config/cpu/generic/cxxabi_tweaks.h (_GLIBCXX_GUARD_TEST): Rename + from _GLIBCXX_GUARD_ACQUIRE and reverse sense. + (_GLIBCXX_GUARD_SET): Rename from _GLIBCXX_GUARD_RELEASE. + * config/cpu/arm/cxxabi_tweaks.h: Likewise. + * config/cpu/alpha/atomic_word.h (_GLIBCXX_READ_MEM_BARRIER) + (_GLIBCXX_WRITE_MEM_BARRIER): Define. + * config/cpu/powerpc/atomic_word.h: Likewise. + * config/cpu/sparc/atomic_word.h: Likewise. + * config/cpu/generic/atomic_word.h: Define them, commented out. + * include/bits/atomicity.h: Define defaults. + * config/cpu/ia64/atomic_word.h (__test_and_acquire) + (__set_and_release): New inlines. + (_GLIBCXX_GUARD_TEST_AND_ACQUIRE): Define. + (_GLIBCXX_GUARD_SET_AND_RELEASE): Define. + + * libsupc++/guard.cc (acquire_1): Use __builtin_trap instead of + abort(); + 2004-12-27 Paolo Carlini <pcarlini@suse.de> * include/tr1/type_traits: Rework the _DEFINE_SPEC* macros. |