Version of [Patch 746578] that works with Linux and is likely to work elsewhere

1 files changed, 49 insertions, 0 deletions

diff --git a/unix/tclUnixThrd.c b/unix/tclUnixThrd.c
index 297fc3b..ef06dee 100644
--- a/unix/tclUnixThrd.c
+++ b/unix/tclUnixThrd.c
@@ -199,6 +199,55 @@ TclpThreadExit(status)
 }
 #endif /* TCL_THREADS */
 
+#ifdef TCL_THREADS
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclpThreadGetStackSize --
+ *
+ *	This procedure returns the size of the current thread's stack.
+ *
+ * Results:
+ *	Stack size (in bytes?) or -1 for error or 0 for undeterminable.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclpThreadGetStackSize()
+{
+#if defined(HAVE_PTHREAD_SETSTACKSIZE) && defined(TclpPthreadGetAttrs)
+    pthread_attr_t threadAttr;	/* This will hold the thread attributes for
+				 * the current thread. */
+    size_t stackSize;
+
+    if (pthread_attr_init(&threadAttr) != 0) {
+	return -1;
+    }
+    if (TclpPthreadGetAttrs(pthread_self(), &threadAttr) != 0) {
+	pthread_attr_destroy(&threadAttr);
+	return -1;
+    }
+    if (pthread_attr_getstacksize(&threadAttr, &stackSize) != 0) {
+	pthread_attr_destroy(&threadAttr);
+	return -1;
+    }
+    pthread_attr_destroy(&threadAttr);
+    return (int) stackSize;
+#else
+    /*
+     * Cannot determine the real stack size of this thread.  The
+     * caller might want to try looking at the process accounting
+     * limits instead.
+     */
+    return 0;
+#endif
+}
+#endif /* TCL_THREADS */
+
 /*
  *----------------------------------------------------------------------
  *