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-rw-r--r--sal/osl/unx/mutex.cxx189
1 files changed, 189 insertions, 0 deletions
diff --git a/sal/osl/unx/mutex.cxx b/sal/osl/unx/mutex.cxx
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+++ b/sal/osl/unx/mutex.cxx
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+/* -*- 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: */