Merge in the pthread library. This is the linuxthreads library taken from

glibc 2.1.3 and ported to work with uClibc by Stefan Soucek and Erik Andersen
(me).  Stefan has hacked things up such that linuxthreads runs on MMU-less
systems (tested only on arm-nommu).  Erik cleaned things up and made it work
properly as a shared library.
 -Erik

2 files changed, 81 insertions, 0 deletions

diff --git a/include/features.h b/include/features.h
index 033cf98d6..580ed3ee6 100644
--- a/include/features.h
+++ b/include/features.h
@@ -378,6 +378,7 @@
 /* This comes between the return type and function name in
  *    a function definition to make that definition weak.  */
 # define weak_function __attribute__ ((weak))
+# define weak_const_function __attribute__ ((weak, __const__))
 /* Tacking on "\n\t#" to the section name makes gcc put it's bogus
  * section attributes on what looks like a comment to the assembler. */
 #  define link_warning(symbol, msg)					      \
diff --git a/include/semaphore.h b/include/semaphore.h
new file mode 100644
index 000000000..84742233b
--- /dev/null
+++ b/include/semaphore.h
@@ -0,0 +1,80 @@
+/* Linuxthreads - a simple clone()-based implementation of Posix        */
+/* threads for Linux.                                                   */
+/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr)              */
+/*                                                                      */
+/* This program is free software; you can redistribute it and/or        */
+/* modify it under the terms of the GNU Library General Public License  */
+/* as published by the Free Software Foundation; either version 2       */
+/* of the License, or (at your option) any later version.               */
+/*                                                                      */
+/* This program is distributed in the hope that it will be useful,      */
+/* but WITHOUT ANY WARRANTY; without even the implied warranty of       */
+/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        */
+/* GNU Library General Public License for more details.                 */
+
+#ifndef _SEMAPHORE_H
+#define _SEMAPHORE_H    1
+
+#include <features.h>
+#include <sys/types.h>
+
+#ifndef _PTHREAD_DESCR_DEFINED
+/* Thread descriptors.  Needed for `sem_t' definition.  */
+typedef struct _pthread_descr_struct *_pthread_descr;
+# define _PTHREAD_DESCR_DEFINED
+#endif
+
+/* System specific semaphore definition.  */
+typedef struct
+{
+  struct
+  {
+    long int status;
+    int spinlock;
+  } __sem_lock;
+  int __sem_value;
+  _pthread_descr __sem_waiting;
+} sem_t;
+
+
+
+/* Value returned if `sem_open' failed.  */
+#define SEM_FAILED	((sem_t *) 0)
+
+/* Maximum value the semaphore can have.  */
+#define SEM_VALUE_MAX 	((int) ((~0u) >> 1))
+
+
+__BEGIN_DECLS
+
+/* Initialize semaphore object SEM to VALUE.  If PSHARED then share it
+   with other processes.  */
+extern int sem_init __P ((sem_t *__sem, int __pshared, unsigned int __value));
+
+/* Free resources associated with semaphore object SEM.  */
+extern int sem_destroy __P ((sem_t *__sem));
+
+/* Open a named semaphore NAME with open flaot OFLAG.  */
+extern sem_t *sem_open __P ((__const char *__name, int __oflag, ...));
+
+/* Close descriptor for named semaphore SEM.  */
+extern int sem_close __P ((sem_t *__sem));
+
+/* Remove named semaphore NAME.  */
+extern int sem_unlink __P ((__const char *__name));
+
+/* Wait for SEM being posted.  */
+extern int sem_wait __P ((sem_t *__sem));
+
+/* Test whether SEM is posted.  */
+extern int sem_trywait __P ((sem_t *__sem));
+
+/* Post SEM.  */
+extern int sem_post __P ((sem_t *__sem));
+
+/* Get current value of SEM and store it in *SVAL.  */
+extern int sem_getvalue __P ((sem_t *__sem, int *__sval));
+
+__END_DECLS
+
+#endif  /* semaphore.h */