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Merge pull request #580 from ourairquality/newlib-lock-fix

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newlib lock support: use a separate mutex and recursive mutex.
This commit is contained in:
Ruslan V. Uss 2018-02-23 22:30:20 +05:00 committed by GitHub
commit ed1a6cc6f3
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1 changed files with 12 additions and 12 deletions
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24
core/newlib_syscalls.c
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@ -246,11 +246,10 @@ extern _lock_t __sinit_recursive_mutex;
void init_newlib_locks()
{
_lock_init(&__arc4random_mutex);
#if 0
/* Separate mutex for each lock.
/* Used a separate mutex for each lock.
* Each mutex uses about 96 bytes which adds up. */
_lock_init(&__arc4random_mutex);
_lock_init(&__at_quick_exit_mutex);
//_lock_init(&__dd_hash_mutex);
_lock_init(&__tz_mutex);
@ -261,19 +260,20 @@ void init_newlib_locks()
_lock_init_recursive(&__sfp_recursive_mutex);
_lock_init_recursive(&__sinit_recursive_mutex);
#else
/* Reuse the same mutex for all these, reducing memory usage. Newlib
* will still allocate other locks dynamically and some of those need
* to be separate such as the file lock where a thread might block with
* them held. */
/* Reuse one mutex and one recursive mutex for this set, reducing memory
* usage. Newlib will still allocate other locks dynamically and some of
* those need to be separate such as the file lock where a thread might
* block with them held. */
_lock_init(&__arc4random_mutex);
__at_quick_exit_mutex = __arc4random_mutex;
//__dd_hash_mutex = __arc4random_mutex;
__tz_mutex = __arc4random_mutex;
__atexit_recursive_mutex = __arc4random_mutex;
__env_recursive_mutex = __arc4random_mutex;
__malloc_recursive_mutex = __arc4random_mutex;
__sfp_recursive_mutex = __arc4random_mutex;
__sinit_recursive_mutex = __arc4random_mutex;
_lock_init_recursive(&__atexit_recursive_mutex);
__env_recursive_mutex = __atexit_recursive_mutex;
__malloc_recursive_mutex = __atexit_recursive_mutex;
__sfp_recursive_mutex = __atexit_recursive_mutex;
__sinit_recursive_mutex = __atexit_recursive_mutex;
#endif
locks_initialized = 1;