diff options
Diffstat (limited to 'sysdeps/hppa/nptl/bits/struct_rwlock.h')
| -rw-r--r-- | sysdeps/hppa/nptl/bits/struct_rwlock.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/sysdeps/hppa/nptl/bits/struct_rwlock.h b/sysdeps/hppa/nptl/bits/struct_rwlock.h new file mode 100644 index 0000000000..5370c7c3bb --- /dev/null +++ b/sysdeps/hppa/nptl/bits/struct_rwlock.h @@ -0,0 +1,58 @@ +/* HPPA internal rwlock struct definitions. + Copyright (C) 2019 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 + <http://www.gnu.org/licenses/>. */ + +#ifndef _RWLOCK_INTERNAL_H +#define _RWLOCK_INTERNAL_H + +struct __pthread_rwlock_arch_t +{ + /* In the old Linuxthreads pthread_rwlock_t, this is the + start of the 4-word 16-byte aligned lock structure. The + next four words are all set to 1 by the Linuxthreads + PTHREAD_RWLOCK_INITIALIZER. We ignore them in NPTL. */ + int __compat_padding[4] __attribute__ ((__aligned__(16))); + unsigned int __readers; + unsigned int __writers; + unsigned int __wrphase_futex; + unsigned int __writers_futex; + unsigned int __pad3; + unsigned int __pad4; + int __cur_writer; + /* An unused word, reserved for future use. It was added + to maintain the location of the flags from the Linuxthreads + layout of this structure. */ + int __reserved1; + /* FLAGS must stay at this position in the structure to maintain + binary compatibility. */ + unsigned char __pad2; + unsigned char __pad1; + unsigned char __shared; + unsigned char __flags; + /* The NPTL pthread_rwlock_t is 4 words smaller than the + Linuxthreads version. One word is in the middle of the + structure, the other three are at the end. */ + int __reserved2; + int __reserved3; + int __reserved4; +}; + +#define __PTHREAD_RWLOCK_INITIALIZER(__flags) \ + { 0, 0, 0, 0 }, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, __flags, 0, 0, 0 + +#endif |