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authorUlrich Drepper <drepper@redhat.com>2003-05-17 20:53:32 +0000
committerUlrich Drepper <drepper@redhat.com>2003-05-17 20:53:32 +0000
commitfddfebbd1064dec313891ad91dd9ca6e92e622ec (patch)
treeed231a996e804653468ac2916a0d4b32628c0093 /nptl/semaphoreP.h
parent68a396e83a8e1e50d0dfde8ffb090a8df311453f (diff)
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Update.
2003-05-17 Ulrich Drepper <drepper@redhat.com> * sem_open.c: Fix one endless loop. Implement correct semantics wrt opening the same semaphore more then once. * sem_close.c: Adjust for sem_open change. * semaphoreP.h: Include <semaphore.h>. Define struct inuse_sem. Declare __sem_mappings, __sem_mappings_lock, __sem_search. * Makefile (tests): Add tst-sem7. * tst-sem7.c: New file.
Diffstat (limited to 'nptl/semaphoreP.h')
-rw-r--r--nptl/semaphoreP.h23
1 files changed, 22 insertions, 1 deletions
diff --git a/nptl/semaphoreP.h b/nptl/semaphoreP.h
index 0d3f6e53a0..d14ea92c74 100644
--- a/nptl/semaphoreP.h
+++ b/nptl/semaphoreP.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@@ -17,8 +17,10 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
+#include <semaphore.h>
#include "pthreadP.h"
+
/* Mount point of the shared memory filesystem. */
struct mountpoint_info
{
@@ -26,16 +28,35 @@ struct mountpoint_info
size_t dirlen;
};
+/* Keeping track of currently used mappings. */
+struct inuse_sem
+{
+ dev_t dev;
+ ino_t ino;
+ int refcnt;
+ sem_t *sem;
+ char name[0];
+};
+
/* Variables used in multiple interfaces. */
extern struct mountpoint_info mountpoint attribute_hidden;
extern pthread_once_t __namedsem_once attribute_hidden;
+/* The search tree for existing mappings. */
+extern void *__sem_mappings attribute_hidden;
+
+/* Lock to protect the search tree. */
+extern lll_lock_t __sem_mappings_lock;
+
/* Initializer for mountpoint. */
extern void __where_is_shmfs (void) attribute_hidden;
+/* Comparison function for search in tree with existing mappings. */
+extern int __sem_search (const void *a, const void *b) attribute_hidden;
+
/* Prototypes of functions with multiple interfaces. */
extern int __new_sem_init (sem_t *sem, int pshared, unsigned int value);