diff options
| author | Thomas Preud'homme <thomas.preudhomme@arm.com> | 2017-01-30 11:23:00 +0000 |
|---|---|---|
| committer | Jeff Johnston <jjohnstn@redhat.com> | 2017-02-13 17:04:17 -0500 |
| commit | fa55c610facaae12e38d90d14e44fecd1259b3ab (patch) | |
| tree | ce19e155be44925f8bd7ed33b501cc414b47f3d2 /newlib/libc/stdlib/quick_exit.c | |
| parent | af272aca591fe1dc0f1be64ae5bda147ea98a047 (diff) | |
| download | newlib-fa55c610facaae12e38d90d14e44fecd1259b3ab.zip newlib-fa55c610facaae12e38d90d14e44fecd1259b3ab.tar.gz newlib-fa55c610facaae12e38d90d14e44fecd1259b3ab.tar.bz2 | |
Only define static locks in multithreaded mode
Newlib build system defines __SINGLE_THREAD__ to allow concurrency code
to be only compiled when newlib is configured for multithread. One such
example are locks which become useless in single thread mode. Although
most static locks are indeed guarded by !defined(__SINGLE_THREAD__),
some are not.
This commit adds these missing guards to __dd_hash_mutex,
__atexit_recursive_mutex, __at_quick_exit_mutex and __arc4random_mutex.
It also makes sure locking macros in lock.h are noop in single thread
mode.
Diffstat (limited to 'newlib/libc/stdlib/quick_exit.c')
| -rw-r--r-- | newlib/libc/stdlib/quick_exit.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/newlib/libc/stdlib/quick_exit.c b/newlib/libc/stdlib/quick_exit.c index aaa5f9f..5ab2609 100644 --- a/newlib/libc/stdlib/quick_exit.c +++ b/newlib/libc/stdlib/quick_exit.c @@ -44,7 +44,9 @@ struct quick_exit_handler { /** * Lock protecting the handlers list. */ +#ifndef __SINGLE_THREAD__ __LOCK_INIT(static, __at_quick_exit_mutex); +#endif /** * Stack of cleanup handlers. These will be invoked in reverse order when */ @@ -60,10 +62,14 @@ at_quick_exit(void (*func)(void)) if (NULL == h) return (1); h->cleanup = func; +#ifndef __SINGLE_THREAD__ __lock_acquire(__at_quick_exit_mutex); +#endif h->next = handlers; handlers = h; +#ifndef __SINGLE_THREAD__ __lock_release(__at_quick_exit_mutex); +#endif return (0); } |