1 files changed, 167 insertions, 0 deletions
diff --git a/sal/osl/os2/mutex.c b/sal/osl/os2/mutex.c
new file mode 100644
index 000000000000..e86b3f965608
--- /dev/null
+++ b/sal/osl/os2/mutex.c
@@ -0,0 +1,167 @@
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org 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 General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#include <sys/fmutex.h>
+
+#include "system.h"
+
+#include <osl/mutex.h>
+#include <osl/diagnose.h>
+
+/*
+    Implementation notes:
+    The void* hidden by oslMutex points to an OS/2 mutex semaphore.
+*/
+typedef struct _oslMutexImpl {
+    HMTX                m_Mutex;
+    int                 m_Locks;
+    ULONG               m_Owner;
+    ULONG               m_Requests;
+} oslMutexImpl;
+
+// static mutex to control access to private members of oslMutexImpl
+static HMTX MutexLock = 0;
+
+/*****************************************************************************/
+/* osl_createMutex */
+/*****************************************************************************/
+oslMutex SAL_CALL osl_createMutex()
+{
+    oslMutexImpl *pMutexImpl;
+    HMTX hMutex;
+    APIRET rc;
+
+    pMutexImpl= (oslMutexImpl*)calloc(sizeof(oslMutexImpl), 1);
+    OSL_ASSERT(pMutexImpl); /* alloc successful? */
+
+    /* create semaphore */
+    rc = DosCreateMutexSem( NULL, &pMutexImpl->m_Mutex, 0, FALSE );
+    if( rc != 0 )
+    {
+        free(pMutexImpl);
+        return NULL;
+    }
+
+    // create static mutex for private members
+    if (MutexLock == 0)
+        DosCreateMutexSem( NULL, &MutexLock, 0, FALSE );
+
+    return (oslMutex)pMutexImpl;
+}
+
+/*****************************************************************************/
+/* osl_destroyMutex */
+/*****************************************************************************/
+void SAL_CALL osl_destroyMutex(oslMutex Mutex)
+{
+    oslMutexImpl *pMutexImpl = (oslMutexImpl *)Mutex;
+    if (pMutexImpl)
+    {
+        DosCloseMutexSem( pMutexImpl->m_Mutex);
+        free(pMutexImpl);
+    }
+}
+
+/*****************************************************************************/
+/* osl_acquireMutex */
+/*****************************************************************************/
+sal_Bool SAL_CALL osl_acquireMutex(oslMutex Mutex)
+{
+    oslMutexImpl *pMutexImpl = (oslMutexImpl *)Mutex;
+    APIRET rc = 0;
+    OSL_ASSERT(Mutex);
+
+    DosRequestMutexSem( MutexLock, SEM_INDEFINITE_WAIT );
+    pMutexImpl->m_Requests++;
+    DosReleaseMutexSem( MutexLock);
+
+    rc = DosRequestMutexSem( pMutexImpl->m_Mutex, SEM_INDEFINITE_WAIT );
+
+    DosRequestMutexSem( MutexLock, SEM_INDEFINITE_WAIT );
+    pMutexImpl->m_Requests--;
+    if (pMutexImpl->m_Locks++ == 0)
+        pMutexImpl->m_Owner = _gettid();
+    DosReleaseMutexSem( MutexLock);
+
+    return( rc == 0 );
+}
+
+/*****************************************************************************/
+/* osl_tryToAcquireMutex */
+/*****************************************************************************/
+sal_Bool SAL_CALL osl_tryToAcquireMutex(oslMutex Mutex)
+{
+    sal_Bool     ret = sal_False;
+    oslMutexImpl *pMutexImpl = (oslMutexImpl *)Mutex;
+    OSL_ASSERT(Mutex);
+
+    DosRequestMutexSem( MutexLock, SEM_INDEFINITE_WAIT );
+
+    if ( ((pMutexImpl->m_Requests == 0) && (pMutexImpl->m_Locks == 0)) ||
+         (pMutexImpl->m_Owner == _gettid()) )
+        ret = osl_acquireMutex(Mutex);
+
+    DosReleaseMutexSem( MutexLock);
+
+    return ret;
+}
+
+/*****************************************************************************/
+/* osl_releaseMutex */
+/*****************************************************************************/
+sal_Bool SAL_CALL osl_releaseMutex(oslMutex Mutex)
+{
+    oslMutexImpl *pMutexImpl = (oslMutexImpl *)Mutex;
+    APIRET rc;
+    OSL_ASSERT(Mutex);
+
+    DosRequestMutexSem( MutexLock, SEM_INDEFINITE_WAIT );
+
+    if (--(pMutexImpl->m_Locks) == 0)
+        pMutexImpl->m_Owner = 0;
+
+    DosReleaseMutexSem( MutexLock);
+
+    rc = DosReleaseMutexSem( pMutexImpl->m_Mutex);
+
+    return sal_True;
+}
+
+
+
+/*****************************************************************************/
+/* osl_getGlobalMutex */
+/*****************************************************************************/
+
+oslMutex g_Mutex = NULL;
+
+oslMutex * SAL_CALL osl_getGlobalMutex(void)
+{
+    if (g_Mutex == NULL)
+        g_Mutex = osl_createMutex();
+    return &g_Mutex;
+}