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Make improvements to locking

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This change makes pthread_mutex_lock() as fast as _spinlock() by
default. Thread instability issues on NetBSD have been resolved.
Improvements made to gdtoa thread code. Crash reporting will now
synchronize between threads in a slightly better way.
This commit is contained in:
Justine Tunney 2022-06-19 01:13:03 -07:00
parent 25041b8026
commit d5312b60f7
60 changed files with 890 additions and 629 deletions
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8
libc/intrin/spinlock.h
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@ -1,5 +1,7 @@
#ifndef COSMOPOLITAN_LIBC_INTRIN_SPINLOCK_H_
#define COSMOPOLITAN_LIBC_INTRIN_SPINLOCK_H_
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
/*───────────────────────────────────────────────────────────────────────────│─╗
│ cosmopolitan § spinlocks ─╬─│┼
╚────────────────────────────────────────────────────────────────────────────│─╝
@ -11,7 +13,7 @@
#define _spinlock(lock) _spinlock_cooperative(lock)
#endif
#define _spunlock(lock) __atomic_store_n(lock, 0, __ATOMIC_RELAXED)
#define _spunlock(lock) (__atomic_store_n(lock, 0, __ATOMIC_RELAXED), 0)
#define _seizelock(lock, value) \
({ \
@ -69,6 +71,8 @@
#define _trylock(lock) __atomic_test_and_set(lock, __ATOMIC_SEQ_CST)
void _spinlock_yield(void);
int _spinlock_yield(void);
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_INTRIN_SPINLOCK_H_ */