UBUNTU: ubuntu: vbox -- update to 5.2.0-dfsg-2

[mirror_ubuntu-bionic-kernel.git] / ubuntu / vbox / vboxguest / r0drv / linux / thread2-r0drv-linux.c

diff --git a/ubuntu/vbox/vboxguest/r0drv/linux/thread2-r0drv-linux.c b/ubuntu/vbox/vboxguest/r0drv/linux/thread2-r0drv-linux.c
new file mode 100644 (file)
index 0000000..aff68f4
--- /dev/null
+++ b/ubuntu/vbox/vboxguest/r0drv/linux/thread2-r0drv-linux.c
@@ -0,0 +1,162 @@
+/* $Id: thread2-r0drv-linux.c $ */
+/** @file
+ * IPRT - Threads (Part 2), Ring-0 Driver, Linux.
+ */
+
+/*
+ * Copyright (C) 2006-2017 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "the-linux-kernel.h"
+#include "internal/iprt.h"
+
+#include <iprt/assert.h>
+#include <iprt/thread.h>
+#include <iprt/err.h>
+#include "internal/thread.h"
+
+
+RTDECL(RTTHREAD) RTThreadSelf(void)
+{
+    return rtThreadGetByNative((RTNATIVETHREAD)current);
+}
+
+
+DECLHIDDEN(int) rtThreadNativeInit(void)
+{
+    return VINF_SUCCESS;
+}
+
+
+DECLHIDDEN(int) rtThreadNativeSetPriority(PRTTHREADINT pThread, RTTHREADTYPE enmType)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 11)
+    /* See comment near MAX_RT_PRIO in linux/sched.h for details on
+       sched_priority. */
+    int                 iSchedClass = SCHED_NORMAL;
+    struct sched_param  Param       = { .sched_priority = MAX_PRIO - 1 };
+    switch (enmType)
+    {
+        case RTTHREADTYPE_INFREQUENT_POLLER:
+            Param.sched_priority = MAX_RT_PRIO + 5;
+            break;
+
+        case RTTHREADTYPE_EMULATION:
+            Param.sched_priority = MAX_RT_PRIO + 4;
+            break;
+
+        case RTTHREADTYPE_DEFAULT:
+            Param.sched_priority = MAX_RT_PRIO + 3;
+            break;
+
+        case RTTHREADTYPE_MSG_PUMP:
+            Param.sched_priority = MAX_RT_PRIO + 2;
+            break;
+
+        case RTTHREADTYPE_IO:
+            iSchedClass = SCHED_FIFO;
+            Param.sched_priority = MAX_RT_PRIO - 1;
+            break;
+
+        case RTTHREADTYPE_TIMER:
+            iSchedClass = SCHED_FIFO;
+            Param.sched_priority = 1; /* not 0 just in case */
+            break;
+
+        default:
+            AssertMsgFailed(("enmType=%d\n", enmType));
+            return VERR_INVALID_PARAMETER;
+    }
+
+    sched_setscheduler(current, iSchedClass, &Param);
+#else
+    RT_NOREF_PV(enmType);
+#endif
+    RT_NOREF_PV(pThread);
+
+    return VINF_SUCCESS;
+}
+
+
+DECLHIDDEN(int) rtThreadNativeAdopt(PRTTHREADINT pThread)
+{
+    RT_NOREF_PV(pThread);
+    return VERR_NOT_IMPLEMENTED;
+}
+
+
+DECLHIDDEN(void) rtThreadNativeWaitKludge(PRTTHREADINT pThread)
+{
+    /** @todo fix RTThreadWait/RTR0Term race on linux. */
+    RTThreadSleep(1); NOREF(pThread);
+}
+
+
+DECLHIDDEN(void) rtThreadNativeDestroy(PRTTHREADINT pThread)
+{
+    NOREF(pThread);
+}
+
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 4)
+/**
+ * Native kernel thread wrapper function.
+ *
+ * This will forward to rtThreadMain and do termination upon return.
+ *
+ * @param pvArg         Pointer to the argument package.
+ */
+static int rtThreadNativeMain(void *pvArg)
+{
+    PRTTHREADINT pThread = (PRTTHREADINT)pvArg;
+
+    rtThreadMain(pThread, (RTNATIVETHREAD)current, &pThread->szName[0]);
+    return 0;
+}
+#endif
+
+
+DECLHIDDEN(int) rtThreadNativeCreate(PRTTHREADINT pThreadInt, PRTNATIVETHREAD pNativeThread)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 4)
+    struct task_struct *NativeThread;
+    IPRT_LINUX_SAVE_EFL_AC();
+
+    RT_ASSERT_PREEMPTIBLE();
+
+    NativeThread = kthread_run(rtThreadNativeMain, pThreadInt, "iprt-%s", pThreadInt->szName);
+
+    if (!IS_ERR(NativeThread))
+    {
+        *pNativeThread = (RTNATIVETHREAD)NativeThread;
+        IPRT_LINUX_RESTORE_EFL_AC();
+        return VINF_SUCCESS;
+    }
+    IPRT_LINUX_RESTORE_EFL_AC();
+    return VERR_GENERAL_FAILURE;
+#else
+    return VERR_NOT_IMPLEMENTED;
+#endif
+}
+