diff options
| author | Carlos O'Donell <carlos@systemhalted.org> | 2015-01-21 00:46:16 -0500 |
|---|---|---|
| committer | Carlos O'Donell <carlos@systemhalted.org> | 2015-01-21 00:46:16 -0500 |
| commit | 042e1521c794a945edc43b5bfa7e69ad70420524 (patch) | |
| tree | 74f44d4b065d801cfe6ace654827ca8ef351bff8 /nptl/structsem.sym | |
| parent | a8db092ec0c6742a9d41e1715946e90d4edfeec1 (diff) | |
| download | glibc-042e1521c794a945edc43b5bfa7e69ad70420524.tar.gz glibc-042e1521c794a945edc43b5bfa7e69ad70420524.tar.xz glibc-042e1521c794a945edc43b5bfa7e69ad70420524.zip | |
Fix semaphore destruction (bug 12674).
This commit fixes semaphore destruction by either using 64b atomic operations (where available), or by using two separate fields when only 32b atomic operations are available. In the latter case, we keep a conservative estimate of whether there are any waiting threads in one bit of the field that counts the number of available tokens, thus allowing sem_post to atomically both add a token and determine whether it needs to call futex_wake. See: https://sourceware.org/ml/libc-alpha/2014-12/msg00155.html
Diffstat (limited to 'nptl/structsem.sym')
| -rw-r--r-- | nptl/structsem.sym | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/nptl/structsem.sym b/nptl/structsem.sym deleted file mode 100644 index 0e2a15f2b5..0000000000 --- a/nptl/structsem.sym +++ /dev/null @@ -1,12 +0,0 @@ -#include <limits.h> -#include <stddef.h> -#include <sched.h> -#include <bits/pthreadtypes.h> -#include "internaltypes.h" - --- - -VALUE offsetof (struct new_sem, value) -PRIVATE offsetof (struct new_sem, private) -NWAITERS offsetof (struct new_sem, nwaiters) -SEM_VALUE_MAX SEM_VALUE_MAX |