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* sync.h (sync::init_lock): Declare new static member.

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(sync::init()): Declare new static function.
* sync.cc (sync::init): Define.
(sync::init): Lock attempt to initialize a muto to stop multiple threads from
colliding.
* dcrt0.cc (dll_crt0_0): Initialize muto environment.
This commit is contained in:
Christopher Faylor
2005-03-06 20:21:30 +00:00
parent a50b6b2dcd
commit 3f02a8d0f4
3 changed files with 25 additions and 7 deletions
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29
winsup/cygwin/sync.cc
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@@ -28,6 +28,13 @@ details. */
#undef WaitForSingleObject
DWORD NO_COPY muto::exiting_thread;
CRITICAL_SECTION NO_COPY muto::init_lock;
void
muto::init ()
{
InitializeCriticalSection (&init_lock);
}
void
muto::grab ()
@@ -39,15 +46,23 @@ muto::grab ()
muto *
muto::init (const char *s)
{
waiters = -1;
/* Create event which is used in the fallback case when blocking is necessary */
if (!(bruteforce = CreateEvent (&sec_none_nih, FALSE, FALSE, NULL)))
muto *res = this;
EnterCriticalSection (&init_lock);
if (!bruteforce)
{
DWORD oerr = GetLastError ();
SetLastError (oerr);
return NULL;
waiters = -1;
bruteforce = CreateEvent (&sec_none_nih, FALSE, FALSE, NULL);
/* Create event which is used in the fallback case when blocking is necessary */
if (bruteforce)
name = s;
else
{
DWORD oerr = GetLastError ();
SetLastError (oerr);
res = NULL;
}
}
name = s;
LeaveCriticalSection (&init_lock);
return this;
}