1 files changed, 160 insertions, 0 deletions
diff --git a/zbar/mutex.h b/zbar/mutex.h
new file mode 100644
index 0000000..4514b88
--- /dev/null
+++ b/zbar/mutex.h
@@ -0,0 +1,160 @@
+/*------------------------------------------------------------------------
+ *  Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+ *
+ *  This file is part of the ZBar Bar Code Reader.
+ *
+ *  The ZBar Bar Code Reader is free software; you can redistribute it
+ *  and/or modify it under the terms of the GNU Lesser Public License as
+ *  published by the Free Software Foundation; either version 2.1 of
+ *  the License, or (at your option) any later version.
+ *
+ *  The ZBar Bar Code Reader 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 Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser Public License
+ *  along with the ZBar Bar Code Reader; if not, write to the Free
+ *  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ *  Boston, MA  02110-1301  USA
+ *
+ *  http://sourceforge.net/projects/zbar
+ *------------------------------------------------------------------------*/
+#ifndef _ZBAR_MUTEX_H_
+#define _ZBAR_MUTEX_H_
+
+#include "config.h"
+
+#include <assert.h>
+
+/* simple platform mutex abstraction
+ */
+
+#if defined(_WIN32)
+
+#include <windows.h>
+
+#define DEBUG_LOCKS
+#ifdef DEBUG_LOCKS
+
+typedef struct zbar_mutex_s {
+    int count;
+    CRITICAL_SECTION mutex;
+} zbar_mutex_t;
+
+static inline int _zbar_mutex_init(zbar_mutex_t *lock)
+{
+    lock->count = 1;
+    InitializeCriticalSection(&lock->mutex);
+    return (0);
+}
+
+static inline void _zbar_mutex_destroy(zbar_mutex_t *lock)
+{
+    DeleteCriticalSection(&lock->mutex);
+}
+
+static inline int _zbar_mutex_lock(zbar_mutex_t *lock)
+{
+    EnterCriticalSection(&lock->mutex);
+    if (lock->count++ < 1)
+	assert(0);
+    return (0);
+}
+
+static inline int _zbar_mutex_unlock(zbar_mutex_t *lock)
+{
+    if (lock->count-- <= 1)
+	assert(0);
+    LeaveCriticalSection(&lock->mutex);
+    return (0);
+}
+
+#else
+
+typedef CRITICAL_SECTION zbar_mutex_t;
+
+static inline int _zbar_mutex_init(zbar_mutex_t *lock)
+{
+    InitializeCriticalSection(lock);
+    return (0);
+}
+
+static inline void _zbar_mutex_destroy(zbar_mutex_t *lock)
+{
+    DeleteCriticalSection(lock);
+}
+
+static inline int _zbar_mutex_lock(zbar_mutex_t *lock)
+{
+    EnterCriticalSection(lock);
+    return (0);
+}
+
+static inline int _zbar_mutex_unlock(zbar_mutex_t *lock)
+{
+    LeaveCriticalSection(lock);
+    return (0);
+}
+
+#endif
+
+#elif defined(HAVE_LIBPTHREAD)
+
+#include <pthread.h>
+
+typedef pthread_mutex_t zbar_mutex_t;
+
+static inline int _zbar_mutex_init(zbar_mutex_t *lock)
+{
+#ifdef DEBUG_LOCKS
+    pthread_mutexattr_t attr;
+    pthread_mutexattr_init(&attr);
+    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
+    int rc = pthread_mutex_init(lock, &attr);
+    pthread_mutexattr_destroy(&attr);
+    return (rc);
+#else
+    return (pthread_mutex_init(lock, NULL));
+#endif
+}
+
+static inline void _zbar_mutex_destroy(zbar_mutex_t *lock)
+{
+    pthread_mutex_destroy(lock);
+}
+
+static inline int _zbar_mutex_lock(zbar_mutex_t *lock)
+{
+    int rc = pthread_mutex_lock(lock);
+#ifdef DEBUG_LOCKS
+    assert(!rc);
+#endif
+    /* FIXME save system code */
+    /*rc = err_capture(proc, SEV_ERROR, ZBAR_ERR_LOCKING, __func__,
+                       "unable to lock processor");*/
+    return (rc);
+}
+
+static inline int _zbar_mutex_unlock(zbar_mutex_t *lock)
+{
+    int rc = pthread_mutex_unlock(lock);
+#ifdef DEBUG_LOCKS
+    assert(!rc);
+#endif
+    /* FIXME save system code */
+    return (rc);
+}
+
+#else
+
+typedef int zbar_mutex_t[0];
+
+#define _zbar_mutex_init(l) -1
+#define _zbar_mutex_destroy(l)
+#define _zbar_mutex_lock(l)   0
+#define _zbar_mutex_unlock(l) 0
+
+#endif
+
+#endif