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* shared.cc (user_shared_initialize): Rework locking so that nothing is checked

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until cb is non-zero.
This commit is contained in:
Christopher Faylor 2005-05-04 01:20:05 +00:00
parent 782e53ca69
commit 530d0e0191
1 changed files with 8 additions and 11 deletions
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19
winsup/cygwin/shared.cc
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@ -189,23 +189,20 @@ user_shared_initialize (bool reinit)
/* Initialize the Cygwin per-user shared, if necessary */ /* Initialize the Cygwin per-user shared, if necessary */
if (!sversion) if (!sversion)
{ {
user_shared->version = USER_VERSION_MAGIC;
debug_printf ("initializing user shared"); debug_printf ("initializing user shared");
user_shared->cb = sizeof (*user_shared);
if (user_shared->cb != sizeof (*user_shared))
system_printf ("size of user shared region changed from %u to %u",
sizeof (*user_shared), user_shared->cb);
user_shared->mountinfo.init (); /* Initialize the mount table. */ user_shared->mountinfo.init (); /* Initialize the mount table. */
/* Initialize the queue of deleted files. */ user_shared->delqueue.init (); /* Initialize the queue of deleted files. */
user_shared->delqueue.init (); user_shared->cb = sizeof (*user_shared);
} }
else if (user_shared->version != USER_VERSION_MAGIC)
multiple_cygwin_problem ("user shared memory version", user_shared->version, USER_VERSION_MAGIC);
else if (user_shared->cb != sizeof (*user_shared))
multiple_cygwin_problem ("user shared memory size", user_shared->cb, sizeof (*user_shared));
else else
{
while (!user_shared->cb) while (!user_shared->cb)
low_priority_sleep (0); // Should be hit only very very rarely low_priority_sleep (0); // Should be hit only very very rarely
if (user_shared->version != sversion)
multiple_cygwin_problem ("user shared memory version", user_shared->version, sversion);
else if (user_shared->cb != sizeof (*user_shared))
multiple_cygwin_problem ("user shared memory size", user_shared->cb, sizeof (*user_shared));
}
} }
void void