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* cygthread.cc (cygthread::stub): Accept flag to pass info structure to thread

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function.
(cygthread::operator new): Add defense debugging output.
(cygthread::cygthread): Add debugging output.  Set name after thread has been
awakened to avoid a race.
(cygthread::exit_thread): Use handle operator rather than using ev directly.
(cygthread::exit_thread): Reorganize to provide debugging.  Set __name to NULL.
* cygthread.h (cygself): Define.
* fhandler_tty.cc (fhandler_tty_master::init): Use cygself as argument so that
invoked thread can access its own info.
(process_output): Derive cygthread info of thread from thread argument.
* sigproc.cc (sigproc_init): Use cygself as argument so that invoked thread can
access its own info.
(wait_sig): Derive cygthread info of thread from thread argument.
This commit is contained in:
Christopher Faylor
2002-08-06 05:08:55 +00:00
parent ffebb4fe0c
commit 1524ae42cf
5 changed files with 53 additions and 14 deletions
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34
winsup/cygwin/cygthread.cc
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@@ -41,10 +41,13 @@ cygthread::stub (VOID *arg)
if (!info->func)
ExitThread (0);
/* Cygwin threads should not call ExitThread */
info->func (info->arg);
/* Cygwin threads should not call ExitThread directly */
info->func (info->arg == cygself ? info : info->arg);
/* ...so the above should always return */
debug_printf ("returned from function %p", info->func);
#ifdef DEBUGGING
info->func = NULL; // catch erroneous activation
#endif
SetEvent (info->ev);
info->__name = NULL;
SuspendThread (info->h);
@@ -100,6 +103,10 @@ new (size_t)
if ((id = (DWORD) InterlockedExchange ((LPLONG) &info->avail, 0)))
{
info->id = id;
#ifdef DEBUGGING
if (info->__name)
api_fatal ("name not NULL? id %p, i %d", id, info - threads);
#endif
return info;
}
@@ -109,10 +116,18 @@ new (size_t)
}
cygthread::cygthread (LPTHREAD_START_ROUTINE start, LPVOID param,
const char *name): __name (name), func (start), arg (param)
const char *name): func (start), arg (param)
{
#ifdef DEBUGGGING
if (!__name)
api_fatal ("name should never be NULL");
#endif
thread_printf ("name %s, id %p", name, id);
while (ResumeThread (h) == 0)
Sleep (0);
__name = name; /* Need to set after thread has woken up to
ensure that it won't be cleared by exiting
thread. */
}
/* Return the symbolic name of the current thread for debugging.
@@ -157,7 +172,7 @@ HANDLE ()
void
cygthread::exit_thread ()
{
SetEvent (ev);
SetEvent (*this);
ExitThread (0);
}
@@ -168,20 +183,23 @@ cygthread::exit_thread ()
void
cygthread::detach ()
{
if (!avail)
if (avail)
system_printf ("called detach on available thread %d?", avail);
else
{
DWORD avail = id;
/* Checking for __name here is just a minor optimization to avoid
an OS call. */
if (!__name)
debug_printf ("thread routine returned. No need to wait.");
thread_printf ("thread id %p returned. No need to wait.", id);
else
{
DWORD res = WaitForSingleObject (*this, INFINITE);
debug_printf ("WFSO returns %d", res);
thread_printf ("WFSO returns %d, id %p", res, id);
}
ResetEvent (*this);
id = 0;
__name = NULL;
/* Mark the thread as available by setting avail to non-zero */
(void) InterlockedExchange ((LPLONG) &this->avail, avail);
}