From d4d74c5f56d312885acf59ce0981994eef8e3dba Mon Sep 17 00:00:00 2001 From: Samuel Thibault Date: Wed, 19 May 2010 08:32:16 +0200 Subject: Add pthread_yield function * pthread/pt-yield.c: New file. * Makefile (SRCS): Add pt-yield.c * Makefile.am (libpthread_a_SOURCES): Add pt-yield.c --- Makefile | 1 + Makefile.am | 1 + include/pthread/pthread.h | 10 +++++++++- pthread/pt-yield.c | 26 ++++++++++++++++++++++++++ 4 files changed, 37 insertions(+), 1 deletion(-) create mode 100644 pthread/pt-yield.c diff --git a/Makefile b/Makefile index 04dfb26..2b895e8 100644 --- a/Makefile +++ b/Makefile @@ -122,6 +122,7 @@ SRCS := pt-attr.c pt-attr-destroy.c pt-attr-getdetachstate.c \ pt-getcpuclockid.c \ \ pt-getschedparam.c pt-setschedparam.c pt-setschedprio.c \ + pt-yield.c \ \ sem-close.c sem-destroy.c sem-getvalue.c sem-init.c sem-open.c \ sem-post.c sem-timedwait.c sem-trywait.c sem-unlink.c \ diff --git a/Makefile.am b/Makefile.am index e59c946..e1c062c 100644 --- a/Makefile.am +++ b/Makefile.am @@ -133,6 +133,7 @@ libpthread_a_SOURCES = pt-attr.c pt-attr-destroy.c pt-attr-getdetachstate.c \ pt-kill.c \ pt-getcpuclockid.c \ pt-getschedparam.c pt-setschedparam.c pt-setschedprio.c \ + pt-yield.c \ sem-close.c sem-init.c sem-timedwait.c sem-wait.c \ sem-destroy.c sem-open.c sem-trywait.c sem-getvalue.c \ sem-post.c sem-unlink.c \ diff --git a/include/pthread/pthread.h b/include/pthread/pthread.h index fbe3294..e6b9249 100644 --- a/include/pthread/pthread.h +++ b/include/pthread/pthread.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2000, 2002, 2005, 2006, 2007, 2008, 2009 +/* Copyright (C) 2000, 2002, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. This file is part of the GNU C Library. @@ -734,6 +734,14 @@ extern int pthread_setschedparam (pthread_t thread, int policy, /* Set thread THREAD's scheduling priority. */ extern int pthread_setschedprio (pthread_t thread, int prio); + +#ifdef __USE_GNU +/* Yield the processor to another thread or process. + This function is similar to the POSIX `sched_yield' function but + might be differently implemented in the case of a m-on-n thread + implementation. */ +extern int pthread_yield (void); +#endif /* Kernel-specific interfaces. */ diff --git a/pthread/pt-yield.c b/pthread/pt-yield.c new file mode 100644 index 0000000..27848bb --- /dev/null +++ b/pthread/pt-yield.c @@ -0,0 +1,26 @@ +/* Yield the processor to another thread or process. + Copyright (C) 2010 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, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include +#include + +int pthread_yield(void) +{ + return sched_yield (); +} -- cgit v1.2.3