From 7946e043840cfab27940a93f7647d136eda8b6d4 Mon Sep 17 00:00:00 2001
From: hobbs <hobbs>
Date: Fri, 8 Feb 2002 09:33:03 +0000
Subject: 	* unix/tclUnixPort.h: 	* unix/tclUnixThrd.c: added
 thread-safe versions of readdir, 	localtime, gmtime and inet_ntoa for
 threaded build. (jgdavidson)

---
 unix/tclUnixPort.h | 10 +++++++-
 unix/tclUnixThrd.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 79 insertions(+), 2 deletions(-)

diff --git a/unix/tclUnixPort.h b/unix/tclUnixPort.h
index 4ca092a..0fafe9f 100644
--- a/unix/tclUnixPort.h
+++ b/unix/tclUnixPort.h
@@ -19,7 +19,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclUnixPort.h,v 1.18 2001/08/30 08:53:15 vincentdarley Exp $
+ * RCS: @(#) $Id: tclUnixPort.h,v 1.19 2002/02/08 09:33:03 hobbs Exp $
  */
 
 #ifndef _TCLUNIXPORT
@@ -497,6 +497,14 @@ typedef pthread_mutex_t TclpMutex;
 EXTERN void	TclpMutexInit _ANSI_ARGS_((TclpMutex *mPtr));
 EXTERN void	TclpMutexLock _ANSI_ARGS_((TclpMutex *mPtr));
 EXTERN void	TclpMutexUnlock _ANSI_ARGS_((TclpMutex *mPtr));
+EXTERN struct dirent * 	TclpReaddir(DIR *);
+EXTERN struct tm *     	TclpLocaltime(time_t *);
+EXTERN struct tm *     	TclpGmtime(time_t *);
+EXTERN char *          	TclpInetNtoa(struct in_addr);
+#define readdir(x)	TclpReaddir(x)
+#define localtime(x)	TclpLocaltime(x)
+#define gmtime(x)	TclpGmtime(x)
+#define inet_ntoa(x)	TclpInetNtoa(x)
 #else
 typedef int TclpMutex;
 #define	TclpMutexInit(a)
diff --git a/unix/tclUnixThrd.c b/unix/tclUnixThrd.c
index ccffe3a..5086b2d 100644
--- a/unix/tclUnixThrd.c
+++ b/unix/tclUnixThrd.c
@@ -19,6 +19,18 @@
 #include "tclPort.h"
 #include "pthread.h"
 
+typedef struct ThreadSpecificData {
+    char	    	nabuf[16];
+    struct tm   	gtbuf;
+    struct tm   	ltbuf;
+    struct {
+	struct dirent ent;
+	char name[PATH_MAX+1];
+    } rdbuf;
+} ThreadSpecificData;
+
+static Tcl_ThreadDataKey dataKey;
+
 /*
  * masterLock is used to serialize creation of mutexes, condition
  * variables, and thread local storage.
@@ -760,8 +772,65 @@ TclpFinalizeCondition(condPtr)
 	*condPtr = NULL;
     }
 }
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclpReaddir, TclpLocaltime, TclpGmtime, TclpInetNtoa --
+ *
+ *	These procedures replace core C versions to be used in a
+ *	threaded environment.
+ *
+ * Results:
+ *	See documentation of C functions.
+ *
+ * Side effects:
+ *	See documentation of C functions.
+ *
+ *----------------------------------------------------------------------
+ */
 
+struct dirent *
+TclpReaddir(DIR * dir)
+{
+    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
+    struct dirent *ent;
 
+    ent = &tsdPtr->rdbuf.ent; 
+    if (readdir_r(dir, ent, &ent) != 0) {
+	ent = NULL;
+    }
+    return ent;
+}
 
-#endif /* TCL_THREADS */
+struct tm *
+TclpLocaltime(time_t * clock)
+{
+    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
+
+    return localtime_r(clock, &tsdPtr->ltbuf);
+}
+
+struct tm *
+TclpGmtime(time_t * clock)
+{
+    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
 
+    return gmtime_r(clock, &tsdPtr->gtbuf);
+}
+
+char *
+TclpInetNtoa(struct in_addr addr)
+{
+    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
+    union {
+    	unsigned long l;
+    	unsigned char b[4];
+    } u;
+    
+    u.l = (unsigned long) addr.s_addr;
+    sprintf(tsdPtr->nabuf, "%u.%u.%u.%u", u.b[0], u.b[1], u.b[2], u.b[3]);
+    return tsdPtr->nabuf;
+}
+
+#endif /* TCL_THREADS */
-- 
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