* semaphoreP.h: Declare __old_sem_init and __old_sem_wait.

	* sem_init.c (__new_sem_init): Rewrite to initialize all three
	fields in the structure.
	(__old_sem_init): New function.
	* sem_open.c: Initialize all fields of the structure.
	* sem_getvalue.c: Adjust for renamed element.
	* sysdeps/unix/sysv/linux/Makefile [subdir=nptl]
	(gen-as-const-headers): Add structsem.sym.
	* sysdeps/unix/sysv/linux/structsem.sym: New file.
	* sysdeps/unix/sysv/linux/internaltypes.h: Rename struct sem to
	struct new_sem.  Add struct old_sem.
	* sysdeps/unix/sysv/linux/sem_post.c: Wake only when there are waiters.
	* sysdeps/unix/sysv/linux/i386/i486/sem_post.S: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sem_post.S: Likewise.
	* sysdeps/unix/sysv/linux/sem_wait.c: Indicate that there are waiters.
	* sysdeps/unix/sysv/linux/i386/i486/sem_wait.S: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sem_wait.S: Likewise.
	* sysdeps/unix/sysv/linux/sem_timedwait.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/i486/sem_timedwait.S: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S: Likewise.
	* Makefile (tests): Add tst-sem10, tst-sem11, tst-sem12.
	* tst-sem10.c: New file.
	* tst-sem11.c: New file.
	* tst-sem12.c: New file.
	* tst-typesizes.c: Test struct new_sem and struct old_sem instead
	of struct sem.

2007-05-25  Ulrich Drepper  <drepper@redhat.com>

1 files changed, 40 insertions, 7 deletions

diff --git a/nptl/sem_init.c b/nptl/sem_init.c
index 8709911ac3..e29d900588 100644
--- a/nptl/sem_init.c
+++ b/nptl/sem_init.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -22,6 +22,7 @@
 #include <lowlevellock.h>
 #include <shlib-compat.h>
 #include "semaphoreP.h"
+#include <kernel-features.h>
 
 
 int
@@ -38,18 +39,50 @@ __new_sem_init (sem, pshared, value)
     }
 
   /* Map to the internal type.  */
-  struct sem *isem = (struct sem *) sem;
+  struct new_sem *isem = (struct new_sem *) sem;
 
-  /* Use the value the user provided.  */
-  isem->count = value;
+  /* Use the values the user provided.  */
+  isem->value = value;
+#ifdef __ASSUME_PRIVATE_FUTEX
+  isem->private = pshared ? 0 : FUTEX_PRIVATE_FLAG;
+#else
+  isem->private = pshared ? 0 : THREAD_GETMEM (THREAD_SELF,
+					       header.private_futex);
+#endif
 
-  /* We can completely ignore the PSHARED parameter since inter-process
-     use needs no special preparation.  */
+  isem->nwaiters = 0;
 
   return 0;
 }
 versioned_symbol (libpthread, __new_sem_init, sem_init, GLIBC_2_1);
+
+
+
 #if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
-strong_alias (__new_sem_init, __old_sem_init)
+int
+attribute_compat_text_section
+__old_sem_init (sem, pshared, value)
+     sem_t *sem;
+     int pshared;
+     unsigned int value;
+{
+  /* Parameter sanity check.  */
+  if (__builtin_expect (value > SEM_VALUE_MAX, 0))
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  /* Map to the internal type.  */
+  struct old_sem *isem = (struct old_sem *) sem;
+
+  /* Use the value the user provided.  */
+  isem->value = value;
+
+  /* We cannot store the PSHARED attribute.  So we always use the
+     operations needed for shared semaphores.  */
+
+  return 0;
+}
 compat_symbol (libpthread, __old_sem_init, sem_init, GLIBC_2_0);
 #endif