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