diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv')
4 files changed, 157 insertions, 4 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/Makefile.in b/libpthread/nptl/sysdeps/unix/sysv/linux/Makefile.in index 82b47b691..20b155c10 100644 --- a/libpthread/nptl/sysdeps/unix/sysv/linux/Makefile.in +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/Makefile.in @@ -49,8 +49,6 @@ librt_CSRC := mq_notify.c endif ifeq ($(TARGET_ARCH),sparc) -libpthread_CSRC += lowlevellock.c -libc_CSRC += libc-lowlevellock.c librt_CSRC := mq_notify.c __syscall_error.c endif diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/sparc/Makefile.arch b/libpthread/nptl/sysdeps/unix/sysv/linux/sparc/Makefile.arch index 6a0d2b51d..5f799499b 100644 --- a/libpthread/nptl/sysdeps/unix/sysv/linux/sparc/Makefile.arch +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/sparc/Makefile.arch @@ -6,12 +6,14 @@ # libpthread_SSRC = pt-vfork.S clone.S -libpthread_CSRC = pthread_once.c +libpthread_CSRC = pthread_once.c lowlevellock.c -libc_a_CSRC = fork.c +libc_a_CSRC = fork.c libc-lowlevellock.c libc_a_SSRC = clone.S vfork.S CFLAGS-OMIT-fork.c = -DNOT_IN_libc=1 -DIS_IN_libpthread=1 +CFLAGS-OMIT-libc-lowlevellock.c = -DNOT_IN_libc=1 -DIS_IN_libpthread=1 + ifeq ($(UCLIBC_HAS_STDIO_FUTEXES),y) CFLAGS-fork.c = -D__USE_STDIO_FUTEXES__ endif @@ -19,6 +21,7 @@ endif ASFLAGS-pt-vfork.S = -DNOT_IN_libc=1 -DIS_IN_libpthread=1 -D_LIBC_REENTRANT -DUSE___THREAD CFLAGS-pthread_once.c = -DNOT_IN_libc=1 -DIS_IN_libpthread=1 +CFLAGS-lowlevellock.c = -DNOT_IN_libc=1 -DIS_IN_libpthread=1 ASFLAGS-clone.S = -D_LIBC_REENTRANT diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/sparc/libc-lowlevellock.c b/libpthread/nptl/sysdeps/unix/sysv/linux/sparc/libc-lowlevellock.c new file mode 100644 index 000000000..b19282281 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/sparc/libc-lowlevellock.c @@ -0,0 +1,21 @@ +/* Copyright (C) 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* No difference to lowlevellock.c, except we lose a couple of functions. */ +#include "lowlevellock.c" diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.c b/libpthread/nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.c new file mode 100644 index 000000000..e9ec4df1e --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.c @@ -0,0 +1,131 @@ +/* low level locking for pthread library. SPARC version. + Copyright (C) 2003, 2006, 2007 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <errno.h> +#include <sysdep.h> +#include <lowlevellock.h> +#include <sys/time.h> + + +/* These functions don't get included in libc.so */ +void +__lll_lock_wait (int *futex) +{ + do + { + int oldval = atomic_compare_and_exchange_val_24_acq (futex, 2, 1); + if (oldval != 0) + lll_futex_wait (futex, 2); + } + while (atomic_compare_and_exchange_val_24_acq (futex, 2, 0) != 0); +} + + +#ifdef IS_IN_libpthread +int +__lll_timedlock_wait (int *futex, const struct timespec *abstime) +{ + /* Reject invalid timeouts. */ + if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000) + return EINVAL; + + do + { + struct timeval tv; + struct timespec rt; + + /* Get the current time. */ + (void) gettimeofday (&tv, NULL); + + /* Compute relative timeout. */ + rt.tv_sec = abstime->tv_sec - tv.tv_sec; + rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000; + if (rt.tv_nsec < 0) + { + rt.tv_nsec += 1000000000; + --rt.tv_sec; + } + + /* Already timed out? */ + if (rt.tv_sec < 0) + return ETIMEDOUT; + + /* Wait. */ + int oldval = atomic_compare_and_exchange_val_24_acq (futex, 2, 1); + if (oldval != 0) + lll_futex_timed_wait (futex, 2, &rt); + } + while (atomic_compare_and_exchange_val_24_acq (futex, 2, 0) != 0); + + return 0; +} + +int +lll_unlock_wake_cb(int* futex) +{ + int val = atomic_exchange_24_rel(futex, 0); + + if( __builtin_expect( val > 1, 0 ) ) { + lll_futex_wake( futex, 1 ); + } + + return 0; +} + + +int +__lll_timedwait_tid (int *tidp, const struct timespec *abstime) +{ + int tid; + + if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000) + return EINVAL; + + /* Repeat until thread terminated. */ + while ((tid = *tidp) != 0) + { + struct timeval tv; + struct timespec rt; + + /* Get the current time. */ + (void) gettimeofday (&tv, NULL); + + /* Compute relative timeout. */ + rt.tv_sec = abstime->tv_sec - tv.tv_sec; + rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000; + if (rt.tv_nsec < 0) + { + rt.tv_nsec += 1000000000; + --rt.tv_sec; + } + + /* Already timed out? */ + if (rt.tv_sec < 0) + return ETIMEDOUT; + + /* Wait until thread terminates. The kernel so far does not use + the private futex operations for this. */ + if (lll_futex_timed_wait (tidp, tid, &rt) == -ETIMEDOUT) + return ETIMEDOUT; + } + + return 0; +} +#endif |