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Improve locks and signals

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- Introduce fast spinlock API
- Double rand64() perf w/ spinlock
- Improve raise() on New Technology
- Support gettid() across platforms
- Implement SA_NODEFER on New Technology
- Move the lock intrinsics into LIBC_INTRIN
- Make SIGTRAP recoverable on New Technology
- Block SIGCHLD in wait4() on New Technology
- Add threading prototypes for XNU and FreeBSD
- Rewrite abort() fixing its minor bugs on XNU/NT
- Shave down a lot of the content in libc/bits/bits.h
- Let signal handlers modify CPU registers on New Technology
This commit is contained in:
Justine Tunney 2022-04-12 05:20:17 -07:00
parent f68f1789bd
commit 046c7ebd4a
110 changed files with 1514 additions and 876 deletions
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5
libc/bits/atomic.h
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@ -1,6 +1,7 @@
#ifndef COSMOPOLITAN_LIBC_BITS_ATOMIC_H_
#define COSMOPOLITAN_LIBC_BITS_ATOMIC_H_
#include "libc/bits/bits.h"
#include "libc/intrin/lockcmpxchg.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
@ -31,8 +32,8 @@ COSMOPOLITAN_C_START_
})
#define atomic_init(PTR, VAL) atomic_store(PTR, VAL)
#define atomic_exchange(PTR, VAL) lockxchg(PTR, &(VAL))
#define atomic_compare_exchange_strong(X, Y, Z) lockcmpxchg(X, Y, Z)
#define atomic_compare_exchange_weak(X, Y, Z) lockcmpxchg(X, Y, Z)
#define atomic_compare_exchange_strong(X, Y, Z) _lockcmpxchg(X, Y, Z)
#define atomic_compare_exchange_weak(X, Y, Z) _lockcmpxchg(X, Y, Z)
#define atomic_load_explicit(PTR, ORDER) atomic_load(PTR)
#define atomic_store_explicit(PTR, VAL, ORDER) atomic_store(PTR, VAL)
#define atomic_flag_clear_explicit(PTR, ORDER) atomic_store(PTR, 0)