Changeset 19896 in vbox

Timestamp:

May 21, 2009 9:35:42 PM (16 years ago)

Author:

vboxsync

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

47591

Message:

IPRT: Added a RTOnceReset method (needed it for a testcase).

Location:

trunk

Files:

• include/iprt/once.h (modified) (1 diff)
• src/VBox/Runtime/common/misc/once.cpp (modified) (1 diff)

trunk/include/iprt/once.h

@@ -92 +92 @@
 RTDECL(int) RTOnce(PRTONCE pOnce, PFNRTONCE pfnOnce, void *pvUser1, void *pvUser2);
 
+/**
+ * Resets an execute once variable.
+ *
+ * The caller is responsible for making sure there are no concurrent accesses to
+ * the execute once variable.
+ *
+ * @param   pOnce           Pointer to the execute once variable.
+ */
+RTDECL(void) RTOnceReset(PRTONCE pOnce);
+
 /** @} */
 

trunk/src/VBox/Runtime/common/misc/once.cpp

@@ -160 +160 @@
 }
 
+
+RTDECL(void) RTOnceReset(PRTONCE pOnce)
+{
+    /* Cannot be done while busy! */
+    AssertPtr(pOnce);
+    Assert(pOnce->hEventMulti == NIL_RTSEMEVENTMULTI);
+    Assert(pOnce->iState != 1);
+
+    /* Do the same as RTONCE_INITIALIZER does. */
+    ASMAtomicWriteS32(&pOnce->rc, VERR_INTERNAL_ERROR);
+    ASMAtomicWriteS32(&pOnce->iState, -1);
+}
+