semweb and http compile now (but they don't work properly yet).

packages/semweb/lock.h

@@ -0,0 +1,87 @@
+/*  $Id$
+
+    Part of the SWI-Prolog Semweb package
+
+    Author:        Jan Wielemaker
+    E-mail:        wielemak@science.uva.nl
+    WWW:           http://www.swi-prolog.org
+    Copyright (C): 2006, University of Amsterdam
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; either version 2
+    of the License, or (at your option) any later version.
+
+    This program 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 General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#ifndef LOCK_H_INCLUDED
+#define LOCK_H_INCLUDED
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#ifdef __WINDOWS__
+#include <windows.h>
+#if defined(_REENTRANT) && defined(__WINDOWS__)
+enum
+{ SIGNAL     = 0,
+  MAX_EVENTS = 1
+} win32_event_t;
+
+typedef struct
+{ HANDLE events[MAX_EVENTS];		/* events to be signalled */
+  int    waiters;			/* # waiters */
+} win32_cond_t;
+#endif
+#else
+#include <pthread.h>
+#endif
+
+typedef struct rwlock
+{
+#ifdef _REENTRANT
+#ifdef __WINDOWS__
+  CRITICAL_SECTION	mutex;
+  CRITICAL_SECTION	misc_mutex;
+  win32_cond_t		rdcondvar;
+  win32_cond_t		wrcondvar;
+  win32_cond_t		upcondvar;
+#else
+  pthread_mutex_t	mutex;
+  pthread_mutex_t	misc_mutex;
+  pthread_cond_t	rdcondvar;
+  pthread_cond_t	wrcondvar;
+  pthread_cond_t	upcondvar;
+#endif
+  int			waiting_readers;
+  int			waiting_writers;
+  int			waiting_upgrade;
+  size_t		thread_max;
+  int		       *read_by_thread;
+  int			allow_readers;
+  int			lock_level;	/* recursive locks */
+#endif
+  int			writer;
+  int			readers;
+} rwlock;
+
+int	rdlock(rwlock *lock);
+int	wrlock(rwlock *lock, int allow_readers);
+int	lockout_readers(rwlock *lock);
+void	reallow_readers(rwlock *lock);
+int	unlock(rwlock *lock, int rd);
+int	lock_misc(rwlock *lock);
+int	unlock_misc(rwlock *lock);
+int	init_lock(rwlock *lock);
+int	destroy_lock(rwlock *lock);
+
+#endif /*LOCK_H_INCLUDED*/