Libc-763.13.tar.gz

[apple/libc.git] / sys / gettimeofday.c

diff --git a/sys/gettimeofday.c b/sys/gettimeofday.c
index 07ad5f0cea60c3874583938d00dbc1ca40da30c3..56d9312675909dce8811132af14d6405d55e19cd 100644 (file)
--- a/sys/gettimeofday.c
+++ b/sys/gettimeofday.c
@@ -1,21 +1,22 @@
 /*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2003-2005 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
@@ -29,41 +30,45 @@
 #include <tzfile.h>
 #include <sys/time.h>
 #include <errno.h>
-#include <sys/syscall.h>
 #include <unistd.h>
 
-int gettimeofday (struct timeval *tp, struct timezone *tzp)
+#define        __APPLE_API_PRIVATE
+#include <machine/cpu_capabilities.h>
+#undef __APPLE_API_PRIVATE
+
+extern int __gettimeofday(struct timeval *, struct timezone *);
+extern int __commpage_gettimeofday(struct timeval *);
+
+int gettimeofday (struct timeval *tp, void *vtzp)
 {
-        static int validtz = 0;
-        static struct timezone cached_tz = {0};
-        struct timeval localtv;
-#ifdef __ppc__
-       extern __ppc_gettimeofday(struct timeval *, struct timezone *);
-#endif
-  
-        if (tzp && (tp == NULL) && (validtz == 0)) {
-                tp = &localtv;
-        }
+       static int validtz = 0;
+       static struct timezone cached_tz = {0};
+       struct timezone *tzp = (struct timezone *)vtzp;
+       struct timeval atv;
 
-#ifdef __ppc__
-       if(__ppc_gettimeofday(tp, tzp))
-               return(-1);
-#else
-        if (syscall (SYS_gettimeofday, tp, tzp) < 0) {
-                return (-1);
-        }
-#endif
-        if (tzp) {
-               if (validtz == 0)  {
-                       struct tm *localtm = localtime ((time_t *)&tp->tv_sec);
-                       cached_tz.tz_dsttime = localtm->tm_isdst;
-                       cached_tz.tz_minuteswest =
-                               (-localtm->tm_gmtoff / SECSPERMIN) +
-                               (localtm->tm_isdst * MINSPERHOUR);
-                       validtz = 1;
+       if (tp == NULL) {
+           if (tzp == NULL)
+               return  (0);
+           tp = &atv;
+       }
+
+       if (__commpage_gettimeofday(tp)) {              /* first try commpage */
+               if (__gettimeofday(tp, NULL) < 0) {     /* if it fails, use syscall */
+                       return (-1);
                }
-               tzp->tz_dsttime = cached_tz.tz_dsttime;
-               tzp->tz_minuteswest = cached_tz.tz_minuteswest;
-        }
-        return (0);
+       }
+
+       if (tzp) {
+           if (validtz == 0)  {
+               struct tm *localtm = localtime ((time_t *)&tp->tv_sec);
+               cached_tz.tz_dsttime = localtm->tm_isdst;
+               cached_tz.tz_minuteswest =
+                   (-localtm->tm_gmtoff / SECSPERMIN) +
+                   (localtm->tm_isdst * MINSPERHOUR);
+               validtz = 1;
+           }
+           tzp->tz_dsttime = cached_tz.tz_dsttime;
+           tzp->tz_minuteswest = cached_tz.tz_minuteswest;
+       }
+       return (0);
 }