From 1fa40663d322a95532f64be8bf03d74bd73b8a51 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Thu, 8 Sep 2005 03:19:01 +0000
Subject: import pthread_attr_{get,set}stack functions from glibc along with a
 few attr fixes

---
 libpthread/linuxthreads/attr.c | 87 ++++++++++++++++++++++++++++++++++++------
 1 file changed, 76 insertions(+), 11 deletions(-)

(limited to 'libpthread')

diff --git a/libpthread/linuxthreads/attr.c b/libpthread/linuxthreads/attr.c
index 4432a04d1..b1e2d5745 100644
--- a/libpthread/linuxthreads/attr.c
+++ b/libpthread/linuxthreads/attr.c
@@ -12,26 +12,32 @@
 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        */
 /* GNU Library General Public License for more details.                 */
 
-/* changed for uClibc */
+/* Handling of thread attributes */
+
+/* mods for uClibc */
+#define __getpagesize getpagesize
 #define __sched_get_priority_min sched_get_priority_min
 #define __sched_get_priority_max sched_get_priority_max
 
-/* Handling of thread attributes */
-
+#include <features.h>
+#define __USE_GNU
 #include <errno.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdio_ext.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <sys/param.h>
+#include <sys/resource.h>
 #include "pthread.h"
 #include "internals.h"
 
-extern int __getpagesize(void);
-
 /* NOTE: With uClibc I don't think we need this versioning stuff.
  * Therefore, define the function pthread_attr_init() here using
  * a strong symbol. */
 
-//int __pthread_attr_init_2_1(pthread_attr_t *attr)
+/*int __pthread_attr_init_2_1(pthread_attr_t *attr)*/
 int pthread_attr_init(pthread_attr_t *attr)
 {
   size_t ps = __getpagesize ();
@@ -41,7 +47,11 @@ int pthread_attr_init(pthread_attr_t *attr)
   attr->__schedparam.sched_priority = 0;
   attr->__inheritsched = PTHREAD_EXPLICIT_SCHED;
   attr->__scope = PTHREAD_SCOPE_SYSTEM;
+#ifdef NEED_SEPARATE_REGISTER_STACK
+  attr->__guardsize = ps + ps;
+#else
   attr->__guardsize = ps;
+#endif
   attr->__stackaddr = NULL;
   attr->__stackaddr_set = 0;
   attr->__stacksize = STACK_SIZE - ps;
@@ -156,11 +166,6 @@ int pthread_attr_getscope(const pthread_attr_t *attr, int *scope)
 
 int __pthread_attr_setguardsize(pthread_attr_t *attr, size_t guardsize)
 {
-  size_t ps = __getpagesize ();
-
-  /* First round up the guard size.  */
-  guardsize = roundup (guardsize, ps);
-
   /* The guard size must not be larger than the stack itself */
   if (guardsize >= attr->__stacksize) return EINVAL;
 
@@ -185,6 +190,9 @@ int __pthread_attr_setstackaddr(pthread_attr_t *attr, void *stackaddr)
 }
 weak_alias (__pthread_attr_setstackaddr, pthread_attr_setstackaddr)
 
+link_warning (pthread_attr_setstackaddr,
+	      "the use of `pthread_attr_setstackaddr' is deprecated, use `pthread_attr_setstack'")
+
 int __pthread_attr_getstackaddr(const pthread_attr_t *attr, void **stackaddr)
 {
   /* XXX This function has a stupid definition.  The standard specifies
@@ -195,8 +203,26 @@ int __pthread_attr_getstackaddr(const pthread_attr_t *attr, void **stackaddr)
 }
 weak_alias (__pthread_attr_getstackaddr, pthread_attr_getstackaddr)
 
+link_warning (pthread_attr_getstackaddr,
+	      "the use of `pthread_attr_getstackaddr' is deprecated, use `pthread_attr_getstack'")
+
 int __pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize)
 {
+#ifdef FLOATING_STACKS
+  /* We have to check against the maximum allowed stack size.  This is no
+     problem if the manager is already started and we determined it.  If
+     this hasn't happened, we have to find the limit outself.  */
+  if (__pthread_max_stacksize == 0)
+    __pthread_init_max_stacksize ();
+
+  if (stacksize > __pthread_max_stacksize)
+    return EINVAL;
+#else
+  /* We have a fixed size limit.  */
+  if (stacksize > STACK_SIZE)
+    return EINVAL;
+#endif
+
   /* We don't accept value smaller than PTHREAD_STACK_MIN.  */
   if (stacksize < PTHREAD_STACK_MIN)
     return EINVAL;
@@ -212,3 +238,42 @@ int __pthread_attr_getstacksize(const pthread_attr_t *attr, size_t *stacksize)
   return 0;
 }
 weak_alias (__pthread_attr_getstacksize, pthread_attr_getstacksize)
+
+int __pthread_attr_setstack (pthread_attr_t *attr, void *stackaddr,
+			     size_t stacksize)
+{
+  int err;
+
+  if ((((uintptr_t) stackaddr)
+       & (__alignof__ (struct _pthread_descr_struct) - 1)) != 0)
+    err = EINVAL;
+  else
+    err = __pthread_attr_setstacksize (attr, stacksize);
+  if (err == 0)
+    {
+#ifndef _STACK_GROWS_UP
+      attr->__stackaddr = (char *) stackaddr + stacksize;
+#else
+      attr->__stackaddr = stackaddr;
+#endif
+      attr->__stackaddr_set = 1;
+    }
+
+  return err;
+}
+
+int __pthread_attr_getstack (const pthread_attr_t *attr, void **stackaddr,
+			     size_t *stacksize)
+{
+  /* XXX This function has a stupid definition.  The standard specifies
+     no error value but what is if no stack address was set?  We simply
+     return the value we have in the member.  */
+#ifndef _STACK_GROWS_UP
+  *stackaddr = (char *) attr->__stackaddr - attr->__stacksize;
+#else
+  *stackaddr = attr->__stackaddr;
+#endif
+  *stacksize = attr->__stacksize;
+  return 0;
+}
+weak_alias (__pthread_attr_getstack, pthread_attr_getstack)
-- 
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