1 files changed, 189 insertions, 0 deletions
diff --git a/sal/osl/unx/mutex.cxx b/sal/osl/unx/mutex.cxx
new file mode 100644
index 000000000..8cdc2a071
--- /dev/null
+++ b/sal/osl/unx/mutex.cxx
@@ -0,0 +1,189 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#if defined LINUX
+// to define __USE_UNIX98, via _XOPEN_SOURCE, enabling pthread_mutexattr_settype
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE 1
+#endif
+#endif
+#include "system.hxx"
+#include "unixerrnostring.hxx"
+
+#include <sal/log.hxx>
+#include <osl/mutex.h>
+
+#include <pthread.h>
+#include <stdlib.h>
+
+
+typedef struct _oslMutexImpl
+{
+    pthread_mutex_t mutex;
+} oslMutexImpl;
+
+oslMutex SAL_CALL osl_createMutex()
+{
+    oslMutexImpl* pMutex = static_cast<oslMutexImpl*>(malloc(sizeof(oslMutexImpl)));
+    pthread_mutexattr_t aMutexAttr;
+    int nRet=0;
+
+    SAL_WARN_IF(!pMutex, "sal.osl.mutex", "null pMutex");
+
+    if ( pMutex == nullptr )
+    {
+        return nullptr;
+    }
+
+    pthread_mutexattr_init(&aMutexAttr);
+
+    nRet = pthread_mutexattr_settype(&aMutexAttr, PTHREAD_MUTEX_RECURSIVE);
+    if( nRet == 0 )
+        nRet = pthread_mutex_init(&(pMutex->mutex), &aMutexAttr);
+    if ( nRet != 0 )
+    {
+        SAL_WARN("sal.osl.mutex", "pthread_muxex_init failed: " << UnixErrnoString(nRet));
+
+        free(pMutex);
+        pMutex = nullptr;
+    }
+
+    pthread_mutexattr_destroy(&aMutexAttr);
+
+    return pMutex;
+}
+
+void SAL_CALL osl_destroyMutex(oslMutex pMutex)
+{
+    SAL_WARN_IF(!pMutex, "sal.osl.mutex", "null pMutex");
+
+    if ( pMutex != nullptr )
+    {
+        int nRet = pthread_mutex_destroy(&(pMutex->mutex));
+        if ( nRet != 0 )
+        {
+            SAL_WARN("sal.osl.mutex", "pthread_mutex_destroy failed: " << UnixErrnoString(nRet));
+        }
+
+        free(pMutex);
+    }
+}
+
+#ifdef __COVERITY__
+    extern void __coverity_recursive_lock_acquire__(void*);
+    extern void __coverity_recursive_lock_release__(void*);
+    extern void __coverity_assert_locked__(void*);
+#endif
+
+sal_Bool SAL_CALL osl_acquireMutex(oslMutex pMutex)
+{
+    SAL_WARN_IF(!pMutex, "sal.osl.mutex", "null pMutex");
+
+    if ( pMutex != nullptr )
+    {
+        int nRet = pthread_mutex_lock(&(pMutex->mutex));
+        if ( nRet != 0 )
+        {
+            SAL_WARN("sal.osl.mutex", "pthread_mutex_lock failed: " << UnixErrnoString(nRet));
+            return false;
+        }
+#ifdef __COVERITY__
+    __coverity_recursive_lock_acquire__(pMutex);
+#endif
+        return true;
+    }
+
+    /* not initialized */
+    return false;
+}
+
+sal_Bool SAL_CALL osl_tryToAcquireMutex(oslMutex pMutex)
+{
+    bool result = false;
+
+    SAL_WARN_IF(!pMutex, "sal.osl.mutex", "null pMutex");
+
+    if ( pMutex )
+    {
+        int nRet = pthread_mutex_trylock(&(pMutex->mutex));
+        if ( nRet == 0  )
+        {
+#ifdef __COVERITY__
+            __coverity_recursive_lock_acquire__(pMutex);
+#endif
+            result = true;
+        }
+    }
+
+    return result;
+}
+
+sal_Bool SAL_CALL osl_releaseMutex(oslMutex pMutex)
+{
+#ifdef __COVERITY__
+    __coverity_assert_locked__(pMutex);
+#endif
+    SAL_WARN_IF(!pMutex, "sal.osl.mutex", "null pMutex");
+
+    if ( pMutex )
+    {
+        int nRet = pthread_mutex_unlock(&(pMutex->mutex));
+        if ( nRet != 0 )
+        {
+            SAL_WARN("sal.osl.mutex", "pthread_mutex_unlock failed: " << UnixErrnoString(nRet));
+            return false;
+        }
+
+#ifdef __COVERITY__
+            __coverity_recursive_lock_release__(pMutex);
+#endif
+        return true;
+    }
+
+    /* not initialized */
+    return false;
+}
+
+static oslMutexImpl globalMutexImpl;
+
+static void globalMutexInitImpl() {
+    pthread_mutexattr_t attr;
+    if (pthread_mutexattr_init(&attr) != 0 ||
+        pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) ||
+        pthread_mutex_init(&globalMutexImpl.mutex, &attr) != 0 ||
+        pthread_mutexattr_destroy(&attr) != 0)
+    {
+        abort();
+    }
+}
+
+oslMutex * SAL_CALL osl_getGlobalMutex()
+{
+    /* necessary to get a "oslMutex *" */
+    static oslMutex globalMutex = &globalMutexImpl;
+
+    static pthread_once_t once = PTHREAD_ONCE_INIT;
+    if (pthread_once(&once, &globalMutexInitImpl) != 0) {
+        abort();
+    }
+
+    return &globalMutex;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */