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* thread.cc (pthread_mutex::_fixup_after_fork): Just reset lock to pristine 

state after fork.  Don't recreate a mutex since it may not actually be needed.
This commit is contained in:
Christopher Faylor 2008-09-30 02:22:39 +00:00
parent e7afe579f5
commit 18f43099f7
2 changed files with 12 additions and 22 deletions
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6
winsup/cygwin/ChangeLog
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@ -1,3 +1,9 @@
2008-09-29 Christopher Faylor <me+cygwin@cgf.cx>
* thread.cc (pthread_mutex::_fixup_after_fork): Just reset lock to
pristine state after fork. Don't recreate a mutex since it may not
actually be needed.
2008-09-29 Corinna Vinschen <corinna@vinschen.de>
* flock.cc (inode_t::get_all_locks_list): Fix typo.

28
winsup/cygwin/thread.cc
View File

@ -1673,30 +1673,14 @@ pthread_mutex::_fixup_after_fork ()
{
debug_printf ("mutex %x in _fixup_after_fork", this);
if (pshared != PTHREAD_PROCESS_PRIVATE)
api_fatal ("pthread_mutex::_fixup_after_fork () doesn'tunderstand PROCESS_SHARED mutex's");
if (owner == NULL)
{
/* mutex has no owner, reset to initial */
lock_counter = 0;
#ifdef DEBUGGING
tid = 0;
#endif
}
else if (lock_counter != 0)
{
/* All waiting threads are gone after a fork */
lock_counter = 1;
#ifdef DEBUGGING
tid = 0xffffffff; /* Don't know the tid after a fork */
#endif
}
win32_obj_id = ::CreateSemaphore (&sec_none_nih, 0, LONG_MAX, NULL);
if (!win32_obj_id)
api_fatal ("pthread_mutex::_fixup_after_fork () failed to recreate win32 semaphore for mutex");
api_fatal ("pthread_mutex::_fixup_after_fork () doesn't understand PROCESS_SHARED mutex's");
/* All waiting threads are gone after a fork */
lock_counter = 0;
owner = NULL;
win32_obj_id = NULL;
condwaits = 0;
tid = 0; /* Don't know the tid after a fork */
}
pthread_mutexattr::pthread_mutexattr ():verifyable_object (PTHREAD_MUTEXATTR_MAGIC),