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| author | Florian Weimer <fweimer@redhat.com> | 2021-02-23 14:59:34 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2021-02-23 14:59:34 +0100 |
| commit | 5a664d7ae8e42d641a7b4b436987ff67ab483b08 (patch) | |
| tree | d2530831e3613ab86b5f536341304ac8cc98f452 /nptl/lowlevellock.c | |
| parent | 597d0267b5c4a925f0175837ec09df9f77e0a250 (diff) | |
| download | glibc-5a664d7ae8e42d641a7b4b436987ff67ab483b08.zip glibc-5a664d7ae8e42d641a7b4b436987ff67ab483b08.tar.gz glibc-5a664d7ae8e42d641a7b4b436987ff67ab483b08.tar.bz2 | |
nptl: Move elision implementations into libc
The elision interfaces are closely aligned between the targets that
implement them, so declare them in the generic <lowlevellock.h>
file.
Empty .c stubs are provided, so that fewer makefile updates
under sysdeps are needed. Also simplify initialization via
__libc_early_init.
The symbols __lll_clocklock_elision, __lll_lock_elision,
__lll_trylock_elision, __lll_unlock_elision, __pthread_force_elision
move into libc. For the time being, non-hidden references are used
from libpthread to access them, but once that part of libpthread
is moved into libc, hidden symbols will be used again. (Hidden
references seem desirable to reduce the likelihood of transactions
aborts.)
Diffstat (limited to 'nptl/lowlevellock.c')
| -rw-r--r-- | nptl/lowlevellock.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/nptl/lowlevellock.c b/nptl/lowlevellock.c index 7976c6d..2d077d8 100644 --- a/nptl/lowlevellock.c +++ b/nptl/lowlevellock.c @@ -51,3 +51,8 @@ __lll_lock_wait (int *futex, int private) } } libc_hidden_def (__lll_lock_wait) + +#if ENABLE_ELISION_SUPPORT +int __pthread_force_elision __attribute__ ((nocommon)); +libc_hidden_data_def (__pthread_force_elision) +#endif |