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authorUlrich Drepper <drepper@redhat.com>2007-05-23 20:51:45 +0000
committerUlrich Drepper <drepper@redhat.com>2007-05-23 20:51:45 +0000
commit5a8075b116280d0c1ece277e4be75250efca45b2 (patch)
tree7c63a4ba94c14bc46ececab97c299aff01078fb7 /nptl/sysdeps/i386
parent6d59823c29df228415836f289e62064f95849e71 (diff)
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* init.c (__pthread_initialize_minimal_internal): Check whether
private futexes are available. * allocatestack.c (allocate_stack): Copy private_futex field from current thread into the new stack. * sysdeps/unix/sysv/linux/x86_64/libc-lowlevellock.S: Use private futexes if they are available. * sysdeps/unix/sysv/linux/i386/i486/libc-lowlevellock.S: Likewise * sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: Adjust so that change in libc-lowlevellock.S allow using private futexes. * sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S: Likewise. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.h: Define FUTEX_PRIVATE_FLAG. * sysdeps/unix/sysv/linux/i386/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/pthread_once.S: Use private futexes if they are available. * sysdeps/unix/sysv/linux/i386/pthread_once.S: Likewise. * sysdeps/x86_64/tcb-offsets.sym: Add PRIVATE_FUTEX. * sysdeps/i386/tcb-offsets.sym: Likewise. * sysdeps/x86_64/tls.h (tcbhead_t): Add private_futex field. * sysdeps/i386/tls.h (tcbhead_t): Likewise.
Diffstat (limited to 'nptl/sysdeps/i386')
-rw-r--r--nptl/sysdeps/i386/tcb-offsets.sym3
-rw-r--r--nptl/sysdeps/i386/tls.h4
2 files changed, 7 insertions, 0 deletions
diff --git a/nptl/sysdeps/i386/tcb-offsets.sym b/nptl/sysdeps/i386/tcb-offsets.sym
index 7c8d9a5ca5..69f9deb368 100644
--- a/nptl/sysdeps/i386/tcb-offsets.sym
+++ b/nptl/sysdeps/i386/tcb-offsets.sym
@@ -12,3 +12,6 @@ CLEANUP offsetof (struct pthread, cleanup)
CLEANUP_PREV offsetof (struct _pthread_cleanup_buffer, __prev)
MUTEX_FUTEX offsetof (pthread_mutex_t, __data.__lock)
POINTER_GUARD offsetof (tcbhead_t, pointer_guard)
+#ifndef __ASSUME_PRIVATE_FUTEX
+PRIVATE_FUTEX offsetof (tcbhead_t, private_futex)
+#endif
diff --git a/nptl/sysdeps/i386/tls.h b/nptl/sysdeps/i386/tls.h
index d9044f3fde..3bdf0f2b04 100644
--- a/nptl/sysdeps/i386/tls.h
+++ b/nptl/sysdeps/i386/tls.h
@@ -28,6 +28,7 @@
# include <stdlib.h>
# include <list.h>
# include <sysdep.h>
+# include <kernel-features.h>
/* Type for the dtv. */
@@ -53,6 +54,9 @@ typedef struct
uintptr_t stack_guard;
uintptr_t pointer_guard;
int gscope_flag;
+#ifndef __ASSUME_PRIVATE_FUTEX
+ int private_futex;
+#endif
} tcbhead_t;
# define TLS_MULTIPLE_THREADS_IN_TCB 1