diff options
Diffstat (limited to 'sysdeps/i386/nptl/pthread_spin_trylock.S')
| -rw-r--r-- | sysdeps/i386/nptl/pthread_spin_trylock.S | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/sysdeps/i386/nptl/pthread_spin_trylock.S b/sysdeps/i386/nptl/pthread_spin_trylock.S new file mode 100644 index 0000000000..528d03ddad --- /dev/null +++ b/sysdeps/i386/nptl/pthread_spin_trylock.S @@ -0,0 +1,44 @@ +/* Copyright (C) 2002-2025 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <errno.h> +#include <shlib-compat.h> + +ENTRY (__pthread_spin_trylock) + movl 4(%esp), %edx + movl $1, %eax + xorl %ecx, %ecx + lock + cmpxchgl %ecx, (%edx) + movl $EBUSY, %eax +#ifdef HAVE_CMOV + cmovel %ecx, %eax +#else + jne 0f + movl %ecx, %eax +0: +#endif + ret +END (__pthread_spin_trylock) +versioned_symbol (libc, __pthread_spin_trylock, pthread_spin_trylock, + GLIBC_2_34) + +#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34) +compat_symbol (libpthread, __pthread_spin_trylock, pthread_spin_trylock, + GLIBC_2_2) +#endif |