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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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GPG key ID: 4AEE18F83AFDEB23
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() void init_newlib_locks()
{ {
_lock_init(&__arc4random_mutex);
#if 0 #if 0
/* Separate mutex for each lock. /* Used a separate mutex for each lock.
* Each mutex uses about 96 bytes which adds up. */ * Each mutex uses about 96 bytes which adds up. */
_lock_init(&__arc4random_mutex);
_lock_init(&__at_quick_exit_mutex); _lock_init(&__at_quick_exit_mutex);
//_lock_init(&__dd_hash_mutex); //_lock_init(&__dd_hash_mutex);
_lock_init(&__tz_mutex); _lock_init(&__tz_mutex);
@ -261,19 +260,20 @@ void init_newlib_locks()
_lock_init_recursive(&__sfp_recursive_mutex); _lock_init_recursive(&__sfp_recursive_mutex);
_lock_init_recursive(&__sinit_recursive_mutex); _lock_init_recursive(&__sinit_recursive_mutex);
#else #else
/* Reuse the same mutex for all these, reducing memory usage. Newlib /* Reuse one mutex and one recursive mutex for this set, reducing memory
* will still allocate other locks dynamically and some of those need * usage. Newlib will still allocate other locks dynamically and some of
* to be separate such as the file lock where a thread might block with * those need to be separate such as the file lock where a thread might
* them held. */ * block with them held. */
_lock_init(&__arc4random_mutex);
__at_quick_exit_mutex = __arc4random_mutex; __at_quick_exit_mutex = __arc4random_mutex;
//__dd_hash_mutex = __arc4random_mutex; //__dd_hash_mutex = __arc4random_mutex;
__tz_mutex = __arc4random_mutex; __tz_mutex = __arc4random_mutex;
__atexit_recursive_mutex = __arc4random_mutex; _lock_init_recursive(&__atexit_recursive_mutex);
__env_recursive_mutex = __arc4random_mutex; __env_recursive_mutex = __atexit_recursive_mutex;
__malloc_recursive_mutex = __arc4random_mutex; __malloc_recursive_mutex = __atexit_recursive_mutex;
__sfp_recursive_mutex = __arc4random_mutex; __sfp_recursive_mutex = __atexit_recursive_mutex;
__sinit_recursive_mutex = __arc4random_mutex; __sinit_recursive_mutex = __atexit_recursive_mutex;
#endif #endif
locks_initialized = 1; locks_initialized = 1;