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Message-ID:	<05ec01c0ae25$41f98b30$0200a8c0@lifelesswks>
From:	"Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>
To:	<cygwin-apps AT cygwin DOT com>
Cc:	"Corinna Vinschen" <cygwin-apps AT cygwin DOT com>
References:	<044501c0adda$0e19c6e0$0200a8c0 AT lifelesswks> <20010316094740 DOT F19468 AT cygbert DOT vinschen DOT de> <04ae01c0adfa$1101be10$0200a8c0 AT lifelesswks> <3AB218BC DOT 90356B48 AT yahoo DOT com>
Subject:	Re: pthread_cond*
Date:	Sat, 17 Mar 2001 01:27:35 +1100
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----- Original Message -----
From: "Earnie Boyd" <earnie_boyd AT yahoo DOT com>


> Robert Collins wrote:
> >
> > its /usr, and they are going into /usr/i686-pc-cygwin/include. How
do
> > you cygwin maintainers get the snapshots to install into
/usr/include ?
> > Or is it safest to just copy pthreads.h (the only one I've changed
to
> > date) to /usr/include?
> >
>
> Chris has a script.  I never install directly into /usr.  I ``make
> install prefix=`pwd`/nstl'' and then move the contents, and create a
> tarball to install.  Remember, you can't replace the cygwin1.dll when
> you're executing a Cygwin application.

Thanks.

>
> Earnie.
>
> P.S.:  This thread is on the wrong list.  You should move it to
> cygwin-developers AT cygwin DOT com.  The cygwin-apps list is to discuss
> changes to applications that use the Cygwin runtime.  The
> cygwin-developers is to be used for discussing the development of the
> cygwin runtime itself.
>

Yes, But.
A) The list is approval-only, and
B) I've finished the work (Patch send to cygwin-patches just now.)

So I'm happy to move this thread to cygwin-developers, but please don't
subscribe me - just CC me (unless I become a regular cygwin contributor,
I simply don't need any additional mail in my mailbox).

I thought this list would be a little more receptive and tolerant of
slightly off-topic posts than the main cygwin list (where this would be
100% noise).

For those who are interested the patch has this ChangeLog

Changelog:

Saturday Mar 17 01:19 2001 Robert Collins rbtcollins AT hotmail DOT com

    * cygwin/cygwin.din: Export the new functions
    * cygwin/pthread.cc: Wrapper functions that call __pthread_cond*
functions
    * cygwin/thread.cc: Implement the pthread_cond* functions
    * cygwin/thread.h: Add new class entries and prototypes for
__pthread_cond* functions
    * cygwin/include/pthread.h: user land header prototypes for
pthread_cond* functions and related defines

The attached c file is the core test rig I used. It doesn't test
_everything.

Also, I'm not fluent with shared memory implications, so I'm not sure
what, if any effect the condattr pshared stuff will have. Likewise for
forking of applications - do all the threads get forked too? And their
cond variables? Is that automagically taken care of, or should I code
something in?


Rob

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#include <pthread.h>=0A=
=0A=
#if 0=0A=
#ifndef PTHREAD_CANCEL_ASYNCHRONOUS=0A=
#error undefined PTHREAD_CANCEL_ASYNCHRONOUS=0A=
#endif=0A=
#ifndef PTHREAD_CANCEL_ENABLE=0A=
#error undefined PTHREAD_CANCEL_ENABLE=0A=
#endif=0A=
#ifndef PTHREAD_CANCEL_DEFERRED=0A=
#error undefined PTHREAD_CANCEL_DEFERRED=0A=
#endif=0A=
#ifndef PTHREAD_CANCEL_DISABLE=0A=
#error undefined PTHREAD_CANCEL_DISABLE=0A=
#endif=0A=
#ifndef PTHREAD_CANCELED=0A=
#error undefined PTHREAD_CANCELED=0A=
#endif=0A=
#endif=0A=
#if HARD_CODE=0A=
#ifndef PTHREAD_COND_INITIALIZER=0A=
#error undefined PTHREAD_COND_INITIALIZER=0A=
#endif=0A=
#endif=0A=
#if 0=0A=
#ifndef PTHREAD_CREATE_DETACHED=0A=
#error undefined PTHREAD_CREATE_DETACHED=0A=
#endif=0A=
#ifndef PTHREAD_CREATE_JOINABLE=0A=
#error undefined PTHREAD_CREATE_JOINABLE=0A=
#endif=0A=
#ifndef PTHREAD_EXPLICIT_SCHED=0A=
#error undefined PTHREAD_EXPLICIT_SCHED=0A=
#endif=0A=
#ifndef PTHREAD_INHERIT_SCHED=0A=
#error undefined PTHREAD_INHERIT_SCHED=0A=
#endif=0A=
#ifndef PTHREAD_MUTEX_DEFAULT=0A=
#error undefined PTHREAD_MUTEX_DEFAULT=0A=
#endif=0A=
#ifndef PTHREAD_MUTEX_ERRORCHECK=0A=
#error undefined PTHREAD_MUTEX_ERRORCHECK=0A=
#endif=0A=
#ifndef PTHREAD_MUTEX_NORMAL=0A=
#error undefined PTHREAD_MUTEX_NORMAL=0A=
#endif=0A=
#ifndef PTHREAD_MUTEX_INITIALIZER=0A=
#error undefined PTHREAD_MUTEX_INITIALIZER=0A=
#endif=0A=
#ifndef PTHREAD_MUTEX_RECURSIVE=0A=
#error undefined PTHREAD_MUTEX_RECURSIVE=0A=
#endif=0A=
#ifndef PTHREAD_ONCE_INIT=0A=
#error undefined PTHREAD_ONCE_INIT=0A=
#endif=0A=
#ifndef PTHREAD_PRIO_INHERIT=0A=
#error undefined PTHREAD_PRIO_INHERIT=0A=
#endif=0A=
#ifndef PTHREAD_PRIO_NONE=0A=
#error undefined PTHREAD_PRIO_NONE=0A=
#endif=0A=
#ifndef PTHREAD_PRIO_PROTECT=0A=
#error undefined PTHREAD_PRIO_PROTECT=0A=
#endif=0A=
#endif=0A=
#ifndef PTHREAD_PROCESS_SHARED=0A=
#error undefined PTHREAD_PROCESS_SHARED=0A=
#endif=0A=
#ifndef PTHREAD_PROCESS_PRIVATE=0A=
#error undefined PTHREAD_PROCESS_PRIVATE=0A=
#endif=0A=
#if 0=0A=
#ifndef PTHREAD_RWLOCK_INITIALIZER=0A=
#error undefined PTHREAD_RWLOCK_INITIALIZER=0A=
#endif=0A=
#ifndef PTHREAD_SCOPE_PROCESS=0A=
#error undefined PTHREAD_SCOPE_PROCESS=0A=
#endif=0A=
#ifndef PTHREAD_SCOPE_SYSTEM=0A=
#error undefined PTHREAD_SCOPE_SYSTEM=0A=
#endif=0A=
=0A=
#endif=0A=
=0A=
typedef struct datastruct {=0A=
  pthread_cond_t cond;=0A=
  pthread_mutex_t mutex;=0A=
  int testvalue;=0A=
} datastruct_t;=0A=
=0A=
static int trv=3D1;=0A=
=0A=
void *threadfunc(void *argument) {=0A=
  datastruct_t *mydata=3Dargument;=0A=
  /* get the mutex */=0A=
  if (pthread_mutex_lock(&mydata->mutex))=0A=
    return &trv;=0A=
  /* loop on the value */=0A=
  while (mydata->testvalue>0) {=0A=
    /* set the variable value */=0A=
    if (mydata->testvalue>0)=0A=
      mydata->testvalue--;=0A=
    /* tell any waiting threads */=0A=
    if (pthread_cond_signal(&mydata->cond))=0A=
      return &trv;=0A=
    /* release the mutex so the waiting (and now signaled thread) can =
get the lock */=0A=
    if (pthread_mutex_unlock(&mydata->mutex))=0A=
      return &trv;=0A=
    sleep(1);=0A=
    /* get the mutex again so we can update the value */=0A=
    if (pthread_mutex_lock(&mydata->mutex))=0A=
      return &trv;=0A=
  }=0A=
  /* we have the mutex here */=0A=
  if (pthread_mutex_unlock(&mydata->mutex))=0A=
    return &trv;=0A=
=0A=
  trv=3D0;=0A=
  return &trv;=0A=
}=0A=
=0A=
main(void) {=0A=
datastruct_t data;=0A=
pthread_condattr_t condattr;=0A=
pthread_t thread;=0A=
int rv,pshared;=0A=
=0A=
rv =3D pthread_condattr_init(&condattr);=0A=
printf("condattr init %d\n",rv);=0A=
rv =3D pthread_condattr_getpshared(&condattr, &pshared);=0A=
printf("condattr getpshared %d, pshared %d\n",rv,pshared);=0A=
rv =3D pthread_condattr_setpshared(&condattr, PTHREAD_PROCESS_SHARED);=0A=
printf("condattr setpshared %d\n");=0A=
rv =3D pthread_condattr_getpshared(&condattr, &pshared);=0A=
printf("condattr getpshared %d, pshared %d\n",rv,pshared);=0A=
=0A=
rv =3D pthread_cond_init(&data.cond, &condattr);=0A=
printf("cond init %d\n",rv);=0A=
=0A=
rv =3D pthread_mutex_init(&data.mutex, NULL);=0A=
printf("mutex init %d\n",rv);=0A=
=0A=
data.testvalue=3D50;=0A=
=0A=
rv =3D pthread_create(&thread, NULL, threadfunc, &data);=0A=
printf("create thread %d\n",rv);=0A=
=0A=
=0A=
/* get the mutex */=0A=
printf("locking mutex\n");=0A=
rv =3D pthread_mutex_lock(&data.mutex);=0A=
printf("lock mutex %d\n",rv);=0A=
=0A=
while (data.testvalue > 0) {=0A=
  printf("waiting on the condition\n");=0A=
  rv =3D pthread_cond_wait(&data.cond, &data.mutex);=0A=
  printf("cond wait %d\n",rv);=0A=
  printf("testvalue %d--\n",data.testvalue--);=0A=
}=0A=
=0A=
rv =3D pthread_mutex_unlock(&data.mutex);=0A=
printf("mutex unlock %d\n",rv);=0A=
=0A=
//rv =3D 0;=0A=
//while (!rv) {=0A=
///* this is bad programming! busy loop until the thread cannot be found =
*/=0A=
//rv =3D pthread_cancel(&thread);=0A=
//}=0A=
//printf("thread has exited\n");=0A=
=0A=
rv =3D pthread_mutex_destroy(&data.mutex);=0A=
printf("mutex destroy %d\n",rv);=0A=
=0A=
rv =3D pthread_cond_destroy(&data.cond);=0A=
printf("cond destroy %d\n",rv);=0A=
#if HARD_CODE=0A=
rv =3D pthread_cond_destroy(&cond2);=0A=
printf("cond2(default init) destroy %d\n",rv);=0A=
#endif=0A=
=0A=
rv =3D pthread_condattr_destroy(&condattr);=0A=
printf("condattr destroy %d\n",rv);=0A=
=0A=
=0A=
=0A=
return 0;=0A=
}=0A=

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