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/* w32-sema.c
Copyright (C) 2001 Werner Koch (dd9jn)
Copyright (C) 2001, 2002, 2004 g10 Code GmbH
This file is part of GPGME.
GPGME is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
GPGME is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/types.h>
#include <windows.h>
#include <io.h>
#include "util.h"
#include "sema.h"
#include "debug.h"
static void
sema_fatal (const char *text)
{
fprintf (stderr, "sema.c: %s\n", text);
abort ();
}
static void
critsect_init (struct critsect_s *s)
{
CRITICAL_SECTION *mp;
static CRITICAL_SECTION init_lock;
static int initialized;
if (!initialized) {
/* The very first time we call this function, we assume that
only one thread is running, so that we can bootstrap the
semaphore code. */
InitializeCriticalSection (&init_lock);
initialized = 1;
}
if (!s)
return; /* we just want to initialize ourself */
/* first test whether it is really not initialized */
EnterCriticalSection (&init_lock);
if ( s->private ) {
LeaveCriticalSection (&init_lock);
return;
}
/* now init it */
mp = malloc ( sizeof *mp );
if (!mp) {
LeaveCriticalSection (&init_lock);
sema_fatal ("out of core while creating critical section lock");
}
InitializeCriticalSection (mp);
s->private = mp;
LeaveCriticalSection (&init_lock);
}
void
_gpgme_sema_subsystem_init ()
{
/* fixme: we should check that there is only one thread running */
critsect_init (NULL);
}
void
_gpgme_sema_cs_enter ( struct critsect_s *s )
{
if (!s->private)
critsect_init (s);
EnterCriticalSection ( (CRITICAL_SECTION*)s->private );
}
void
_gpgme_sema_cs_leave (struct critsect_s *s)
{
if (!s->private)
critsect_init (s);
LeaveCriticalSection ((CRITICAL_SECTION*)s->private);
}
void
_gpgme_sema_cs_destroy ( struct critsect_s *s )
{
if (s && s->private) {
DeleteCriticalSection ((CRITICAL_SECTION*)s->private);
free (s->private);
s->private = NULL;
}
}
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