* Added pthread_setconcurrency(), and pthread_getconcurrency() functions.

* Since we use a 1:1 mapping, they don't do anything besides remembering the
  level set, though.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24855 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/posix/pthread.h

@@ -163,6 +163,8 @@ extern void pthread_exit(void *value_ptr);
 extern int pthread_join(pthread_t thread, void **_value);
 extern pthread_t pthread_self(void);
 extern int pthread_kill(pthread_t thread, int sig);
+extern int pthread_getconcurrency(void);
+extern int pthread_setconcurrency(int newLevel);
 
 extern int pthread_cancel(pthread_t thread);
 extern int pthread_setcancelstate(int state, int *_oldState);

src/system/libroot/posix/pthread/pthread.c

@@ -19,6 +19,7 @@ static const pthread_attr pthread_attr_default = {
 
 
 static int32 sPthreadSlot = -1;
+static int sConcurrencyLevel;
 
 
 struct pthread_thread *
@@ -157,3 +158,20 @@ pthread_detach(pthread_t thread)
 	return 0;
 }
 
+
+int
+pthread_getconcurrency(void)
+{
+	return sConcurrencyLevel;
+}
+
+
+int
+pthread_setconcurrency(int newLevel)
+{
+	if (newLevel < 0)
+		return EINVAL;
+
+	sConcurrencyLevel = newLevel;
+	return 0;
+}