Add per-thread cache to malloc

[thirdparty/glibc.git] / include / errno.h

diff --git a/include/errno.h b/include/errno.h
index 35f705100eef7e580f52979114d9a54293961a31..3c3d2288c8bb2a8dab9f1b49e36b7e06463a3ff1 100644 (file)
--- a/include/errno.h
+++ b/include/errno.h
@@ -1,13 +1,47 @@
+#ifndef _ERRNO_H
 #include <stdlib/errno.h>
+#if !defined _ISOMAC && !defined __ASSEMBLER__
 
-#ifdef _ERRNO_H
+# if IS_IN (rtld)
+#  include <dl-sysdep.h>
+#  ifndef RTLD_PRIVATE_ERRNO
+#   error "dl-sysdep.h must define RTLD_PRIVATE_ERRNO!"
+#  endif
+# else
+#  define RTLD_PRIVATE_ERRNO   0
+# endif
+
+# if RTLD_PRIVATE_ERRNO
+/* The dynamic linker uses its own private errno variable.
+   All access to errno inside the dynamic linker is serialized,
+   so a single (hidden) global variable is all it needs.  */
+
+#  undef  errno
+#  define errno rtld_errno
+extern int rtld_errno attribute_hidden;
+
+# elif IS_IN_LIB
+
+#  include <tls.h>
+
+#  undef  errno
+#  if IS_IN (libc)
+#   define errno __libc_errno
+#  else
+#   define errno errno         /* For #ifndef errno tests.  */
+#  endif
+extern __thread int errno attribute_tls_model_ie;
+
+# endif        /* IS_IN_LIB */
 
-#if USE_TLS && HAVE___THREAD
-# undef errno
-extern __thread int errno;
 # define __set_errno(val) (errno = (val))
-#else
-# define __set_errno(val) (*__errno_location ()) = (val)
-#endif
 
-#endif
+extern int *__errno_location (void) __THROW __attribute_const__
+#  if RTLD_PRIVATE_ERRNO
+     attribute_hidden
+#  endif
+;
+libc_hidden_proto (__errno_location)
+
+#endif /* !_ISOMAC && !__ASSEMBLER__ */
+#endif /* !_ERRNO_H */