VBox

Timestamp:

Jan 5, 2009 1:03:42 PM (16 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

41375

Message:

implemented RTThreadPreemptDisable() and RTThreadPreemptRestore for Linux hosts

Location:

trunk/src/VBox/Runtime

Files:

trunk/src/VBox/Runtime/Makefile.kmk

-              r15400
+              r15798
         generic/RTLogWriteStdOut-stub-generic.cpp \
         generic/mppresent-generic.cpp \
-        r0drv/generic/RTThreadPreemptDisable-r0drv-generic.cpp \
-        r0drv/generic/RTThreadPreemptRestore-r0drv-generic.cpp \
         r0drv/linux/alloc-r0drv-linux.c \
         r0drv/linux/assert-r0drv-linux.c \
 …
         r0drv/linux/process-r0drv-linux.c \
         r0drv/linux/RTLogWriteDebugger-r0drv-linux.c \
+        r0drv/linux/RTThreadPreemptDisable-r0drv-linux.c \
+        r0drv/linux/RTThreadPreemptRestore-r0drv-linux.c \
         r0drv/linux/semevent-r0drv-linux.c \
         r0drv/linux/semeventmulti-r0drv-linux.c \

-              r15797
+              r15798
 /*
  * Copyright (C) 2008 Sun Microsystems, Inc.
+ * Copyright (C) 2009 Sun Microsystems, Inc.
+ *
  * This file is part of VirtualBox Open Source Edition (OSE), as
 …
 *   Header Files                                                               *
 *******************************************************************************/
+#include "the-linux-kernel.h"
 #include <iprt/thread.h>
 #include <iprt/assert.h>
 …
 RTDECL(void) RTThreadPreemptDisable(PRTTHREADPREEMPTSTATE pState)
+{
+    AssertPtr(pState);
+    Assert(pState->uchDummy != 42);
+    pState->uchDummy = 42;
+    /*
+     * Note: This call is a NOP if CONFIG_PREEMPT is not enabled in the Linux kernel
+     * configuration. In that case, schedule() is only called need_resched() is set
+     * which is tested just before we return to R3 (not when returning from R0 to R0).
+     */
+    preempt_disable();
+}

-              r15797
+              r15798
 /*
  * Copyright (C) 2008 Sun Microsystems, Inc.
+ * Copyright (C) 2009 Sun Microsystems, Inc.
+ *
  * This file is part of VirtualBox Open Source Edition (OSE), as
 …
 *   Header Files                                                               *
 *******************************************************************************/
+#include "the-linux-kernel.h"
 #include <iprt/thread.h>
 #include <iprt/assert.h>
 …
 RTDECL(void) RTThreadPreemptRestore(PRTTHREADPREEMPTSTATE pState)
+{
+    AssertPtr(pState);
+    Assert(pState->uchDummy == 42);
+    pState->uchDummy = 0;
+    preempt_enable();
+}

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