Changeset 6961 in vbox

Timestamp:

Feb 14, 2008 5:39:02 PM (17 years ago)

Author:

vboxsync

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

28130

Message:

Generic implementation (in case it's needed).

Location:

trunk/src/VBox/Runtime

Files:

• common/misc/thread.cpp (modified) (2 diffs)
• generic/tls-generic.cpp (added)
• include/internal/thread.h (modified) (3 diffs)

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

@@ -547 +547 @@
 {
     Assert(pThread->cRefs >= 1);
+
+#ifdef IPRT_WITH_GENERIC_TLS
+    /*
+     * Destroy TLS entries.
+     */
+    rtThreadTlsDestruction(pThread);
+#endif /* IPRT_WITH_GENERIC_TLS */
 
     /*
@@ -1319 +1326 @@
 #endif /* IN_RING3 */
 
+
+#ifdef IPRT_WITH_GENERIC_TLS
+
+/**
+ * Thread enumerator - clears a TLS entry.
+ *
+ * @returns 0.
+ * @param   pNode   The thread node.
+ * @param   pvUser  The TLS index.
+ */
+static DECLCALLBACK(int) rtThreadClearTlsEntryCallback(PAVLPVNODECORE pNode, void *pvUser)
+{
+    PRTTHREADINT pThread = (PRTTHREADINT)pNode;
+    RTTLS iTls = (RTTLS)(uintptr_t)pvUser;
+    ASMAtomicWritePtr(&pThread->apvTlsEntries[iTls], NULL);
+    return 0;
+}
+
+
+/**
+ * Helper for the generic TLS implementation that clears a given TLS
+ * entry on all threads.
+ *
+ * @param   iTls        The TLS entry. (valid)
+ */
+void rtThreadClearTlsEntry(RTTLS iTls)
+{
+    RT_THREAD_LOCK_TMP(Tmp);
+    RT_THREAD_LOCK_RD(Tmp);
+    RTAvlPVDoWithAll(&g_ThreadTree, true /* fFromLeft*/, rtThreadClearTlsEntryCallback, (void *)(uintptr_t)iTls);
+    RT_THREAD_UNLOCK_RD(Tmp);
+}
+
+#endif /* IPRT_WITH_GENERIC_TLS */
+

trunk/src/VBox/Runtime/include/internal/thread.h

@@ -79 +79 @@
 /** Max thread name length. */
 #define RTTHREAD_NAME_LEN 16
+#ifdef IPRT_WITH_GENERIC_TLS
+/** The number of TLS entries for the generic implementation. */
+# define RTTHREAD_TLS_ENTRIES 64
+#endif
 
 /**
@@ -133 +137 @@
     RTUINTPTR volatile      uBlockId;
 #endif /* IN_RING3 */
+#ifdef IPRT_WITH_GENERIC_TLS
+    /** The TLS entries for this thread. */
+    void                   *apvTlsEntries[RTTHREAD_TLS_ENTRIES];
+#endif
     /** Thread name. */
     char                    szName[RTTHREAD_NAME_LEN];
@@ -222 +230 @@
 int rtThreadDoSetProcPriority(RTPROCPRIORITY enmPriority);
 #endif /* !IN_RING0 */
+#ifdef IPRT_WITH_GENERIC_TLS
+void rtThreadClearTlsEntry(RTTLS iTls);
+void rtThreadTlsDestruction(PRTTHREADINT pThread); /* in tls-generic.cpp */
+#endif
 
 __END_DECLS