Update.

1998-03-13 00:46  Ulrich Drepper  <drepper@cygnus.com>

	* attr.c: Implement pthread_attr_[gs]etguardsize,
	pthread_attr_[gs]setstackaddr, pthread_attr_[gs]etstacksize.
	Change pthread_attr_init to have two interfaces.
	* internals.h (struct _pthread_descr_struct): Add new fields for
	above functions.
	* libpthread.map: Add names in GLIBC_2.1 section.
	* manager.c (pthread_handle_create): Implement guardsize and
	user stack.
	(pthread_free): Likewise.
	* pthread.c (pthread_create): Add new interface for changed
	pthread_attr_t.
	* sysdeps/pthread/pthread.h: Add prototypes for new functions.
	* sysdeps/unix/sysv/linux/bits/local_lim.h: Add definition of
	PTHREAD_STACK_MIN.

	* manager.c: Enable resetting of the thread scheduling policy
	to SCHED_OTHER when the parent thread has a different one.

1 files changed, 48 insertions, 2 deletions

diff --git a/linuxthreads/pthread.c b/linuxthreads/pthread.c
index 994233ebc7..729222e589 100644
--- a/linuxthreads/pthread.c
+++ b/linuxthreads/pthread.c
@@ -234,8 +234,8 @@ static int pthread_initialize_manager(void)
 
 /* Thread creation */
 
-int pthread_create(pthread_t *thread, const pthread_attr_t *attr,
-                   void * (*start_routine)(void *), void *arg)
+int __pthread_create_2_1(pthread_t *thread, const pthread_attr_t *attr,
+			 void * (*start_routine)(void *), void *arg)
 {
   pthread_descr self = thread_self();
   struct pthread_request request;
@@ -255,6 +255,35 @@ int pthread_create(pthread_t *thread, const pthread_attr_t *attr,
   return self->p_retcode;
 }
 
+#if defined HAVE_ELF && defined PIC && defined DO_VERSIONING
+default_symbol_version (__pthread_create_2_1, pthread_create, GLIBC_2.1);
+
+int __pthread_create_2_0(pthread_t *thread, const pthread_attr_t *attr,
+			 void * (*start_routine)(void *), void *arg)
+{
+  /* The ATTR attribute is not really of type `pthread_attr_t *'.  It has
+     the old size and access to the new members might crash the program.
+     We convert the struct now.  */
+  pthread_attr_t new_attr;
+
+  if (attr != NULL)
+    {
+      size_t ps = __getpagesize ();
+
+      memcpy (&new_attr, attr, (size_t) &(((pthread_attr_t*)NULL)->guardsize));
+      new_attr.guardsize = ps;
+      new_attr.stackaddr_set = 0;
+      new_attr.stackaddr = NULL;
+      new_attr.stacksize = STACK_SIZE - ps;
+      attr = &new_attr;
+    }
+  return __pthread_create_2_1 (thread, attr, start_routine, arg);
+}
+symbol_version (__pthread_create_2_0, pthread_create, GLIBC_2.0);
+#else
+strong_alias (__pthread_create_2_1, pthread_create)
+#endif
+
 /* Simple operations on thread identifiers */
 
 pthread_t pthread_self(void)
@@ -417,6 +446,23 @@ void __pthread_kill_other_threads_np(void)
 }
 weak_alias (__pthread_kill_other_threads_np, pthread_kill_other_threads_np)
 
+/* Concurrency symbol level.  */
+static int current_level;
+
+int __pthread_setconcurrency(int level)
+{
+  /* We don't do anything unless we have found a useful interpretation.  */
+  current_level = level;
+  return 0;
+}
+weak_alias (__pthread_setconcurrency, pthread_setconcurrency)
+
+int __pthread_getconcurrency(void)
+{
+  return current_level;
+}
+weak_alias (__pthread_getconcurrency, pthread_getconcurrency)
+
 /* Debugging aid */
 
 #ifdef DEBUG