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* dcrt0.cc (dll_crt0_0): Eliminate muto::init call.

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* sync.h (locker): New, currently unused class.
(muto::init): Eliminate.
* sync.cc (muto::init): Ditto.
(muto::init): Eliminate critical section lock and instead use name as a guard
to prevent against multiple attempts to initialize the same muto.
* pinfo.cc (pinfo::init): Set myself procinfo when not execing and pid matches
windows pid or cygwin pid.
This commit is contained in:
Christopher Faylor 2005-03-08 05:05:02 +00:00
parent 4534561877
commit 18edcecfbf
5 changed files with 30 additions and 23 deletions
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12
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,15 @@
2005-03-08 Christopher Faylor <cgf@timesys.com>
* dcrt0.cc (dll_crt0_0): Eliminate muto::init call.
* sync.h (locker): New, currently unused class.
(muto::init): Eliminate.
* sync.cc (muto::init): Ditto.
(muto::init): Eliminate critical section lock and instead use name as a
guard to prevent against multiple attempts to initialize the same muto.
* pinfo.cc (pinfo::init): Set myself procinfo when not execing and pid
matches windows pid or cygwin pid.
2005-03-06 Pavel Tsekov <ptsekov@gmx.net>
* path.cc (mount_info::read_cygdrive_info_from_registry): Use the user

1
winsup/cygwin/dcrt0.cc
View File

@ -574,7 +574,6 @@ void __stdcall
dll_crt0_0 ()
{
wincap.init ();
muto::init ();
initial_env ();
char zeros[sizeof (child_proc_info->zero)] = {0};

3
winsup/cygwin/pinfo.cc
View File

@ -173,7 +173,8 @@ void
pinfo::init (pid_t n, DWORD flag, HANDLE h0)
{
h = NULL;
if (myself && n == myself->pid)
if (myself && !(flag & PID_EXECED)
&& (n == myself->pid || (DWORD) n == myself->dwProcessId))
{
procinfo = myself;
destroy = 0;

28
winsup/cygwin/sync.cc
View File

@ -30,12 +30,6 @@ details. */
DWORD NO_COPY muto::exiting_thread;
CRITICAL_SECTION NO_COPY muto::init_lock;
void
muto::init ()
{
InitializeCriticalSection (&init_lock);
}
void
muto::grab ()
{
@ -46,23 +40,19 @@ muto::grab ()
muto *
muto::init (const char *s)
{
muto *res = this;
EnterCriticalSection (&init_lock);
if (!bruteforce)
char *already_exists = (char *) InterlockedExchangePointer (&name, s);
if (already_exists)
while (!bruteforce)
low_priority_sleep (0);
else
{
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;
}
bruteforce = CreateEvent (&sec_none_nih, FALSE, FALSE, NULL);
if (!bruteforce)
api_fatal ("couldn't allocate muto '%s', %E", s);
}
LeaveCriticalSection (&init_lock);
return this;
}

9
winsup/cygwin/sync.h
View File

@ -40,10 +40,15 @@ public:
void upforgrabs () {tls = this;} // just set to an invalid address
void grab () __attribute__ ((regparm (1)));
static void set_exiting_thread () {exiting_thread = GetCurrentThreadId ();}
static void init ();
};
extern muto muto_start;
class locker
{
muto *room;
public:
locker (muto *m) {room = m; room->acquire ();}
~locker () {room->release ();}
};
/* Use a statically allocated buffer as the storage for a muto */
#define new_muto(__name) \