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| author | Jason Merrill <jason@redhat.com> | 2004-08-27 22:33:54 -0400 |
|---|---|---|
| committer | Jason Merrill <jason@gcc.gnu.org> | 2004-08-27 22:33:54 -0400 |
| commit | 40aac94801f86355bd86cf5b340481ee2f501d3c (patch) | |
| tree | 1f0fd6ce16170d90ee5ebfcb5972ed7af5874607 /gcc/gthr.h | |
| parent | ed3479983db246f3126c12c441659ef6b8ed027e (diff) | |
| download | gcc-40aac94801f86355bd86cf5b340481ee2f501d3c.zip gcc-40aac94801f86355bd86cf5b340481ee2f501d3c.tar.gz gcc-40aac94801f86355bd86cf5b340481ee2f501d3c.tar.bz2 | |
re PR c++/13684 (local static object variable constructed once but ctors and dtors called multiple times on same memory when called in multiple threads)
PR c++/13684
* cp/decl.c (expand_static_init): Use thread-safety API.
(register_dtor_fn): Return the call, don't expand it.
* cp/tree.c (add_stmt_to_compound): New fn.
(stabilize_call): Use it.
* gimplify.c (gimplify_cleanup_point_expr): Handle CLEANUP_EH_ONLY.
(gimple_push_cleanup): Add eh_only parm.
(gimplify_target_expr): Pass it.
* c.opt (-fno-threadsafe-statics): New option.
* c-opts.c (c_common_handle_option): Handle it.
* c-common.h (flag_threadsafe_statics): Declare it.
* c-common.c (flag_threadsafe_statics): Record it.
* doc/invoke.texi: Document it.
* tsystem.h (_GNU_SOURCE): Define.
* gthr-posix.h (__gthread_recursive_mutex_t): New typedef.
(__GTHREAD_RECURSIVE_MUTEX_INIT): New macro.
(__GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION): New macro.
(__gthread_recursive_mutex_init_function): New fn.
(__gthread_recursive_mutex_lock): New fn.
(__gthread_recursive_mutex_trylock): New fn.
(__gthread_recursive_mutex_unlock): New fn.
* gthr-solaris.h, gthr-single.h, gthr-dce.h: Likewise.
* gthr-win32.h, gthr-vxworks.h: Likewise.
* gthr.h: Document.
* libsupc++/guard.cc (static_mutex): Internal class implementing a
recursive mutex which controls initialization of local statics.
(__gnu_cxx::recursive_init): New exception class.
(__cxa_guard_acquire): Deal with locking and recursion detection.
(acquire_1, __cxa_guard_abort, __cxa_guard_release): Likewise.
From-SVN: r86687
Diffstat (limited to 'gcc/gthr.h')
| -rw-r--r-- | gcc/gthr.h | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -42,6 +42,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA __gthread_key_t __gthread_once_t __gthread_mutex_t + __gthread_recursive_mutex_t The threads interface must define the following macros: @@ -56,6 +57,9 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA function which looks like this: void __GTHREAD_MUTEX_INIT_FUNCTION (__gthread_mutex_t *) Don't define __GTHREAD_MUTEX_INIT in this case + __GTHREAD_RECURSIVE_MUTEX_INIT + __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION + as above, but for a recursive mutex. The threads interface must define the following static functions: @@ -71,6 +75,10 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA int __gthread_mutex_trylock (__gthread_mutex_t *mutex); int __gthread_mutex_unlock (__gthread_mutex_t *mutex); + int __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex); + int __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex); + int __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex); + All functions returning int should return zero on success or the error number. If the operation is not supported, -1 is returned. |