update pthread weak handling to the style glibc uses

1 files changed, 7 insertions, 95 deletions

diff --git a/libc/misc/pthread/weaks.c b/libc/misc/pthread/weaks.c
index 4b9e02672..20a98a3fe 100644
--- a/libc/misc/pthread/weaks.c
+++ b/libc/misc/pthread/weaks.c
@@ -18,109 +18,21 @@
    Boston, MA 02111-1307, USA.  */
 
 #define _GNU_SOURCE
-#include <errno.h>
-#include <limits.h>
-#include <stdlib.h>
+#include <libc-internal.h>
 
-/**********************************************************************/
-/* Weaks for application/library use.
+/* Weaks for internal library use only.
  *
  * We need to define weaks here to cover all the pthread functions that
- * libc itself will use so that we aren't forced to link libc.so to
- * libpthread.so.  When an application doesn't use pthreads support,
- * the locking functions used by libc itself basically become no-ops.
- * However, if the application uses pthreads, then it will pull in
- * libpthread.so whose symbols will override these weaks magically
- * turning the internal libc mutex calls from no-ops to real locking
- * calls.
+ * libc itself will use so that we aren't forced to link libc against
+ * libpthread.  This file is only used in libc.a and since we have
+ * weaks here, they will be automatically overridden by libpthread.a
+ * if it gets linked in.
  */
 
-/* glibc itself defines all these, but we don't need them in uClibc
- *
- * Verified by comparing to glibc's linuxthreads/forward.c and defined
- * only those that are in the glibc abi.
- * The commented aliases are ones that were previously defined in uClibc
- * and which I left in for documentation.
- */
-
-static int __pthread_return_0 __P ((void));
+static int __pthread_return_0 (void);
 static int __pthread_return_0 (void) { return 0; }
 
-/*
-weak_alias (__pthread_return_0, pthread_attr_destroy)
-weak_alias (__pthread_return_0, pthread_attr_getdetachstate)
-weak_alias (__pthread_return_0, pthread_attr_getinheritsched)
-weak_alias (__pthread_return_0, pthread_attr_getschedparam)
-weak_alias (__pthread_return_0, pthread_attr_getschedpolicy)
-weak_alias (__pthread_return_0, pthread_attr_getscope)
-weak_alias (__pthread_return_0, pthread_attr_getstackaddr)
-weak_alias (__pthread_return_0, pthread_attr_getstacksize)
-weak_alias (__pthread_return_0, pthread_attr_init)
-weak_alias (__pthread_return_0, pthread_attr_setdetachstate)
-weak_alias (__pthread_return_0, pthread_attr_setinheritsched)
-weak_alias (__pthread_return_0, pthread_attr_setschedparam)
-weak_alias (__pthread_return_0, pthread_attr_setschedpolicy)
-weak_alias (__pthread_return_0, pthread_attr_setscope)
-weak_alias (__pthread_return_0, pthread_attr_setstackaddr)
-weak_alias (__pthread_return_0, pthread_attr_setstacksize)
-weak_alias (__pthread_return_0, pthread_cond_broadcast)
-weak_alias (__pthread_return_0, pthread_cond_destroy)
-weak_alias (__pthread_return_0, pthread_cond_init)
-weak_alias (__pthread_return_0, pthread_cond_signal)
-weak_alias (__pthread_return_0, pthread_cond_timedwait)
-weak_alias (__pthread_return_0, pthread_cond_wait)
-weak_alias (__pthread_return_0, pthread_condattr_destroy)
-weak_alias (__pthread_return_0, pthread_condattr_init)
-weak_alias (__pthread_return_0, pthread_getschedparam)
-weak_alias (__pthread_return_0, pthread_getcancelstate)
-weak_alias (__pthread_return_0, pthread_getconcurrency)
-weak_alias (__pthread_return_0, pthread_mutex_destroy)
-weak_alias (__pthread_return_0, pthread_mutex_init)
-weak_alias (__pthread_return_0, pthread_mutex_lock)
-weak_alias (__pthread_return_0, pthread_mutex_trylock)
-weak_alias (__pthread_return_0, pthread_mutex_unlock)
-weak_alias (__pthread_return_0, pthread_mutexattr_destroy)
-weak_alias (__pthread_return_0, pthread_mutexattr_gettype)
-weak_alias (__pthread_return_0, pthread_mutexattr_init)
-weak_alias (__pthread_return_0, pthread_mutexattr_settype)
-weak_alias (__pthread_return_0, pthread_rwlock_destroy)
-weak_alias (__pthread_return_0, pthread_rwlock_init)
-weak_alias (__pthread_return_0, pthread_rwlock_rdlock)
-weak_alias (__pthread_return_0, pthread_rwlock_tryrdlock)
-weak_alias (__pthread_return_0, pthread_rwlock_trywrlock)
-weak_alias (__pthread_return_0, pthread_rwlock_unlock)
-weak_alias (__pthread_return_0, pthread_rwlock_wrlock)
-weak_alias (__pthread_return_0, pthread_rwlockattr_destroy)
-weak_alias (__pthread_return_0, pthread_rwlockattr_getpshared)
-weak_alias (__pthread_return_0, pthread_rwlockattr_init)
-weak_alias (__pthread_return_0, pthread_rwlockattr_setpshared)
-weak_alias (__pthread_return_0, pthread_self)
-weak_alias (__pthread_return_0, pthread_setcancelstate)
-weak_alias (__pthread_return_0, pthread_setcanceltype)
-weak_alias (__pthread_return_0, pthread_setconcurrency)
-weak_alias (__pthread_return_0, pthread_setschedparam)
-
-static int __pthread_return_1 __P ((void));
-static int __pthread_return_1 (void) { return 1; }
-
-weak_alias (__pthread_return_1, pthread_equal)
-
-void weak_function pthread_exit (void *retval)
-{
-  __exit (EXIT_SUCCESS);
-}
-*/
-
-/**********************************************************************/
-/* Weaks used internally by the C library. */
 weak_alias (__pthread_return_0, __pthread_mutex_init)
 weak_alias (__pthread_return_0, __pthread_mutex_lock)
 weak_alias (__pthread_return_0, __pthread_mutex_trylock)
 weak_alias (__pthread_return_0, __pthread_mutex_unlock)
-#ifdef __UCLIBC_HAS_THREADS_NATIVE__
-weak_alias (__pthread_return_0, pthread_mutexattr_init)
-weak_alias (__pthread_return_0, pthread_mutexattr_settype)
-weak_alias (__pthread_return_0, pthread_mutexattr_destroy)
-#endif
-
-/**********************************************************************/