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author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2018-04-02 01:43:22 +0200 |
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committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2018-04-02 01:44:14 +0200 |
commit | 33574c17eefcf326c1cd30eb9f915ad26d3d9ef2 (patch) | |
tree | 2c1b143f2b7a0ceba9fba000b70dd2889d56e60f /sysdeps/mach/hurd/htl/pt-mutex.h | |
parent | 03e2aa50fd512449025bba8c244d16338d8526a4 (diff) | |
download | glibc-33574c17eefcf326c1cd30eb9f915ad26d3d9ef2.tar.gz glibc-33574c17eefcf326c1cd30eb9f915ad26d3d9ef2.tar.xz glibc-33574c17eefcf326c1cd30eb9f915ad26d3d9ef2.zip |
hurd: Add hurd thread library
Contributed by Agustina Arzille <avarzille@riseup.net> Amos Jeffries <squid3@treenet.co.nz> David Michael <fedora.dm0@gmail.com> Marco Gerards <marco@gnu.org> Marcus Brinkmann <marcus@gnu.org> Neal H. Walfield <neal@gnu.org> Pino Toscano <toscano.pino@tiscali.it> Richard Braun <rbraun@sceen.net> Roland McGrath <roland@gnu.org> Samuel Thibault <samuel.thibault@ens-lyon.org> Thomas DiModica <ricinwich@yahoo.com> Thomas Schwinge <tschwinge@gnu.org> * htl: New directory. * sysdeps/htl: New directory. * sysdeps/hurd/htl: New directory. * sysdeps/i386/htl: New directory. * sysdeps/mach/htl: New directory. * sysdeps/mach/hurd/htl: New directory. * sysdeps/mach/hurd/i386/htl: New directory. * nscd/Depend, resolv/Depend, rt/Depend: Add htl dependency. * sysdeps/mach/hurd/i386/Implies: Add mach/hurd/i386/htl imply. * sysdeps/mach/hurd/i386/libpthread.abilist: New file.
Diffstat (limited to 'sysdeps/mach/hurd/htl/pt-mutex.h')
-rw-r--r-- | sysdeps/mach/hurd/htl/pt-mutex.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/htl/pt-mutex.h b/sysdeps/mach/hurd/htl/pt-mutex.h new file mode 100644 index 0000000000..2daf63e986 --- /dev/null +++ b/sysdeps/mach/hurd/htl/pt-mutex.h @@ -0,0 +1,90 @@ +/* Internal definitions for pthreads library. + Copyright (C) 2016-2018 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If + not, see <http://www.gnu.org/licenses/>. */ + +#ifndef _PT_MUTEX_H +#define _PT_MUTEX_H 1 + +/* Special ID used to signal an unrecoverable robust mutex. */ +#define NOTRECOVERABLE_ID (1U << 31) + +/* Common path for robust mutexes. Assumes the variable 'ret' + * is bound in the function this is called from. */ +#define ROBUST_LOCK(self, mtxp, cb, ...) \ + if (mtxp->__owner_id == NOTRECOVERABLE_ID) \ + return ENOTRECOVERABLE; \ + else if (mtxp->__owner_id == self->thread && \ + __getpid () == (int)(mtxp->__lock & LLL_OWNER_MASK)) \ + { \ + if (mtxp->__type == PT_MTX_RECURSIVE) \ + { \ + if (__glibc_unlikely (mtxp->__cnt + 1 == 0)) \ + return EAGAIN; \ + \ + ++mtxp->__cnt; \ + return 0; \ + } \ + else if (mtxp->__type == PT_MTX_ERRORCHECK) \ + return EDEADLK; \ + } \ + \ + ret = cb (&mtxp->__lock, ##__VA_ARGS__); \ + if (ret == 0 || ret == EOWNERDEAD) \ + { \ + if (mtxp->__owner_id == ENOTRECOVERABLE) \ + ret = ENOTRECOVERABLE; \ + else \ + { \ + mtxp->__owner_id = self->thread; \ + mtxp->__cnt = 1; \ + if (ret == EOWNERDEAD) \ + { \ + mtxp->__lock = mtxp->__lock | LLL_DEAD_OWNER; \ + atomic_write_barrier (); \ + } \ + } \ + } \ + (void)0 + +/* Check that a thread owns the mutex. For non-robust, task-shared + * objects, we have to check the thread *and* process-id. */ +#define mtx_owned_p(mtx, pt, flags) \ + ((mtx)->__owner_id == (pt)->thread && \ + (((flags) & GSYNC_SHARED) == 0 || \ + (mtx)->__shpid == __getpid ())) + +/* Record a thread as the owner of the mutex. */ +#define mtx_set_owner(mtx, pt, flags) \ + (void) \ + ({ \ + (mtx)->__owner_id = (pt)->thread; \ + if ((flags) & GSYNC_SHARED) \ + (mtx)->__shpid = __getpid (); \ + }) + +/* Redefined mutex types. The +1 is for binary compatibility. */ +#define PT_MTX_NORMAL __PTHREAD_MUTEX_TIMED +#define PT_MTX_RECURSIVE (__PTHREAD_MUTEX_RECURSIVE + 1) +#define PT_MTX_ERRORCHECK (__PTHREAD_MUTEX_ERRORCHECK + 1) + +/* Mutex type, including robustness. */ +#define MTX_TYPE(mtxp) \ + ((mtxp)->__type | ((mtxp)->__flags & PTHREAD_MUTEX_ROBUST)) + +extern int __getpid (void) __attribute__ ((const)); + +#endif /* pt-mutex.h */ |