zhangyuan29 b74a50775f sem: change sem wait to atomic operation ...

Add sem_wait fast operations, use atomic to ensure
atomicity of semcount operations, and do not depend
on critical section.

Test with robot:
before modify:
nxmutex_lock cost: 78 ns
nxmutex_unlock cost: 82 ns

after modify:
nxmutex_lock cost: 28 ns
nxmutex_unlock cost: 14 ns

Signed-off-by: zhangyuan29 <zhangyuan29@xiaomi.com>

2024-12-10 22:00:42 +08:00

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android

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arpa

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crypto

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cxx

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net

add a flag of lin internal sleep/wakeup state

2024-10-16 14:33:59 +08:00

netinet

netinet/in.h: add IN6_IS_ADDR_GLOBAL macro

2024-11-20 20:42:21 +08:00

netpacket

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nuttx

atomic: Unify the compare_exchange functions of nx and stdatomic

2024-12-10 22:00:42 +08:00

ssp

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sys

Revert "system: pthread_barrierwait should be moved to kernel space"

2024-11-15 22:07:25 +08:00

.gitignore

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aio.h

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alloca.h

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assert.h

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byteswap.h

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ctype.h

libcxx: fix compile error

2024-10-23 09:42:57 +08:00

debug.h

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dirent.h

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dlfcn.h

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dsp.h

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dspb16.h

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elf32.h

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elf64.h

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elf.h

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endian.h

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err.h

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errno.h

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execinfo.h

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fcntl.h

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fixedmath.h

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fnmatch.h

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ftw.h

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gcov.h

Fix compilation errors

2024-11-26 19:25:24 +08:00

getopt.h

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glob.h

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grp.h

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hex2bin.h

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iconv.h

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ifaddrs.h

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inttypes.h

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iso646.h

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langinfo.h

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libgen.h

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libintl.h

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limits.h

sem: change sem wait to atomic operation

2024-12-10 22:00:42 +08:00

locale.h

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lzf.h

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malloc.h

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mqueue.h

[POSIX][Bug] mqueue.h: Include file does not conform the standard

2024-12-09 21:21:09 +08:00

netdb.h

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nl_types.h

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nxflat.h

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obstack.h

libs/libc/obstack: fix allocated chunk overrun due to invalid limit

2024-10-30 11:53:18 -03:00

poll.h

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pthread.h

add spinlock_type.h

2024-11-30 03:25:17 +08:00

pty.h

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pwd.h

libs/libc/pwd: add new member to passwd struct

2024-10-16 11:15:25 +08:00

regex.h

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resolv.h

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sched.h

nuttx/include:Modify the CPU_SET series macro definition in sched.h

2024-10-15 21:05:36 +08:00

search.h

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semaphore.h

sem: change sem wait to atomic operation

2024-12-10 22:00:42 +08:00

shadow.h

libs/libc/unistd: add getspnam function

2024-10-16 11:15:25 +08:00

signal.h

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spawn.h

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stdbool.h

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stddef.h

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stdint.h

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stdio.h

libc: add nx_strdup() & nx_strndup() support

2024-10-15 01:16:48 +08:00

stdlib.h

libc: Refine the arc4random_buf implementation

2024-10-26 18:04:21 -03:00

stdnoreturn.h

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string.h

libc: add nx_strdup() & nx_strndup() support

2024-10-15 01:16:48 +08:00

strings.h

Revert "libc/lib_bzero:Add bzero prototype."

2024-10-23 10:08:23 +08:00

syscall.h

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syslog.h

userspace: Exclude nuttx/arch.h

2024-11-01 16:59:37 +08:00

termios.h

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threads.h

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time.h

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unistd.h

libs/libc/unistd: add crypt function

2024-10-16 11:15:25 +08:00

utime.h

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uuid.h

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wchar.h

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wctype.h

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