diff options
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | nptl/default-sched.h | 35 | ||||
| -rw-r--r-- | nptl/pthread_create.c | 21 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/default-sched.h | 42 |
4 files changed, 91 insertions, 15 deletions
@@ -1,3 +1,11 @@ +2014-11-20 Roland McGrath <roland@hack.frob.com> + + * nptl/default-sched.h: New file. + * sysdeps/unix/sysv/linux/default-sched.h: New file. + * nptl/pthread_create.c: Include it. + (__pthread_create_2_1): Use collect_default_sched instead of making + Linux syscalls here directly. + 2014-11-20 Torvald Riegel <triegel@redhat.com> * nptl/pthread_once.c (clear_once_control, __pthread_once_slow, diff --git a/nptl/default-sched.h b/nptl/default-sched.h new file mode 100644 index 0000000000..fb33e7ccb2 --- /dev/null +++ b/nptl/default-sched.h @@ -0,0 +1,35 @@ +/* Determine calling thread's scheduling parameters. Stub version. + Copyright (C) 2014 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/>. */ + +#include <assert.h> + +/* This should fill in PD->schedpolicy if PD->flags does not contain + ATTR_FLAG_POLICY_SET, and set it; and PD->schedparam if PD->flags does + not contain ATTR_FLAG_SCHED_SET, and set it. It won't be called at all + if both bits are already set. */ + +static void +collect_default_sched (struct pthread *pd) +{ + assert ((pd->flags & (ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET)) != 0); + + /* The generic/stub version is a no-op rather than just using the + __sched_getscheduler and __sched_getparam functions so that there + won't be stub warnings for those functions just because pthread_create + was called without actually calling those. */ +} diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c index 1dd1b951c0..3d4b8cd94e 100644 --- a/nptl/pthread_create.c +++ b/nptl/pthread_create.c @@ -30,6 +30,7 @@ #include <resolv.h> #include <kernel-features.h> #include <exit-thread.h> +#include <default-sched.h> #include <shlib-compat.h> @@ -593,26 +594,16 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg) if (__builtin_expect ((iattr->flags & ATTR_FLAG_NOTINHERITSCHED) != 0, 0) && (iattr->flags & (ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET)) != 0) { - INTERNAL_SYSCALL_DECL (scerr); - /* Use the scheduling parameters the user provided. */ if (iattr->flags & ATTR_FLAG_POLICY_SET) pd->schedpolicy = iattr->schedpolicy; - else if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0) - { - pd->schedpolicy = INTERNAL_SYSCALL (sched_getscheduler, scerr, 1, 0); - pd->flags |= ATTR_FLAG_POLICY_SET; - } - if (iattr->flags & ATTR_FLAG_SCHED_SET) /* The values were validated in pthread_attr_setschedparam. */ - memcpy (&pd->schedparam, &iattr->schedparam, - sizeof (struct sched_param)); - else if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0) - { - INTERNAL_SYSCALL (sched_getparam, scerr, 2, 0, &pd->schedparam); - pd->flags |= ATTR_FLAG_SCHED_SET; - } + pd->schedparam = iattr->schedparam; + + if ((pd->flags & (ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET)) + != (ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET)) + collect_default_sched (pd); } /* Pass the descriptor to the caller. */ diff --git a/sysdeps/unix/sysv/linux/default-sched.h b/sysdeps/unix/sysv/linux/default-sched.h new file mode 100644 index 0000000000..c25778fde8 --- /dev/null +++ b/sysdeps/unix/sysv/linux/default-sched.h @@ -0,0 +1,42 @@ +/* Determine calling thread's scheduling parameters. Linux version. + Copyright (C) 2014 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/>. */ + +#include <sysdep.h> + +/* This should fill in PD->schedpolicy if PD->flags does not contain + ATTR_FLAG_POLICY_SET, and set it; and PD->schedparam if PD->flags does + not contain ATTR_FLAG_SCHED_SET, and set it. It won't be called at all + if both bits are already set. */ + +static void +collect_default_sched (struct pthread *pd) +{ + INTERNAL_SYSCALL_DECL (scerr); + + if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0) + { + pd->schedpolicy = INTERNAL_SYSCALL (sched_getscheduler, scerr, 1, 0); + pd->flags |= ATTR_FLAG_POLICY_SET; + } + + if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0) + { + INTERNAL_SYSCALL (sched_getparam, scerr, 2, 0, &pd->schedparam); + pd->flags |= ATTR_FLAG_SCHED_SET; + } +} |