diff options
author | Dan Albert <danalbert@google.com> | 2015-06-17 11:09:54 -0700 |
---|---|---|
committer | Dan Albert <danalbert@google.com> | 2015-06-17 14:15:22 -0700 |
commit | f378ebf14df0952eae870c9865bab8326aa8f137 (patch) | |
tree | 31794503eb2a8c64ea5f313b93100f1163afcffb /gcc-4.2.1-5666.3/libgomp/config/linux/lock.c | |
parent | 2c58169824949d3a597d9fa81931e001ef9b1bd0 (diff) | |
download | toolchain_gcc-f378ebf14df0952eae870c9865bab8326aa8f137.tar.gz toolchain_gcc-f378ebf14df0952eae870c9865bab8326aa8f137.tar.bz2 toolchain_gcc-f378ebf14df0952eae870c9865bab8326aa8f137.zip |
Delete old versions of GCC.
Change-Id: I710f125d905290e1024cbd67f48299861790c66c
Diffstat (limited to 'gcc-4.2.1-5666.3/libgomp/config/linux/lock.c')
-rw-r--r-- | gcc-4.2.1-5666.3/libgomp/config/linux/lock.c | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/gcc-4.2.1-5666.3/libgomp/config/linux/lock.c b/gcc-4.2.1-5666.3/libgomp/config/linux/lock.c deleted file mode 100644 index 211f6007b..000000000 --- a/gcc-4.2.1-5666.3/libgomp/config/linux/lock.c +++ /dev/null @@ -1,182 +0,0 @@ -/* Copyright (C) 2005 Free Software Foundation, Inc. - Contributed by Richard Henderson <rth@redhat.com>. - - This file is part of the GNU OpenMP Library (libgomp). - - Libgomp 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. - - Libgomp 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 libgomp; see the file COPYING.LIB. If not, write to the - Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, - MA 02110-1301, USA. */ - -/* As a special exception, if you link this library with other files, some - of which are compiled with GCC, to produce an executable, this library - does not by itself cause the resulting executable to be covered by the - GNU General Public License. This exception does not however invalidate - any other reasons why the executable file might be covered by the GNU - General Public License. */ - -/* This is a Linux specific implementation of the public OpenMP locking - primitives. This implementation uses atomic instructions and the futex - syscall. */ - -#include "libgomp.h" -#include <string.h> -#include <unistd.h> -#include <sys/syscall.h> -#include "futex.h" - - -/* The internal gomp_mutex_t and the external non-recursive omp_lock_t - have the same form. Re-use it. */ - -void -omp_init_lock (omp_lock_t *lock) -{ - gomp_mutex_init (lock); -} - -void -omp_destroy_lock (omp_lock_t *lock) -{ - gomp_mutex_destroy (lock); -} - -void -omp_set_lock (omp_lock_t *lock) -{ - gomp_mutex_lock (lock); -} - -void -omp_unset_lock (omp_lock_t *lock) -{ - gomp_mutex_unlock (lock); -} - -int -omp_test_lock (omp_lock_t *lock) -{ - return __sync_bool_compare_and_swap (lock, 0, 1); -} - -/* The external recursive omp_nest_lock_t form requires additional work. */ - -/* We need an integer to uniquely identify this thread. Most generally - this is the thread's TID, which ideally we'd get this straight from - the TLS block where glibc keeps it. Unfortunately, we can't get at - that directly. - - If we don't support (or have disabled) TLS, one function call is as - good (or bad) as any other. Use the syscall all the time. - - On an ILP32 system (defined here as not LP64), we can make do with - any thread-local pointer. Ideally we'd use the TLS base address, - since that requires the least amount of arithmetic, but that's not - always available directly. Make do with the gomp_thread pointer - since it's handy. */ - -#if !defined (HAVE_TLS) -static inline int gomp_tid (void) -{ - return syscall (SYS_gettid); -} -#elif !defined(__LP64__) -static inline int gomp_tid (void) -{ - return (int) gomp_thread (); -} -#else -static __thread int tid_cache; -static inline int gomp_tid (void) -{ - int tid = tid_cache; - if (__builtin_expect (tid == 0, 0)) - tid_cache = tid = syscall (SYS_gettid); - return tid; -} -#endif - - -void -omp_init_nest_lock (omp_nest_lock_t *lock) -{ - memset (lock, 0, sizeof (lock)); -} - -void -omp_destroy_nest_lock (omp_nest_lock_t *lock) -{ -} - -void -omp_set_nest_lock (omp_nest_lock_t *lock) -{ - int otid, tid = gomp_tid (); - - while (1) - { - otid = __sync_val_compare_and_swap (&lock->owner, 0, tid); - if (otid == 0) - { - lock->count = 1; - return; - } - if (otid == tid) - { - lock->count++; - return; - } - - futex_wait (&lock->owner, otid); - } -} - -void -omp_unset_nest_lock (omp_nest_lock_t *lock) -{ - /* ??? Validate that we own the lock here. */ - - if (--lock->count == 0) - { - __sync_lock_release (&lock->owner); - futex_wake (&lock->owner, 1); - } -} - -int -omp_test_nest_lock (omp_nest_lock_t *lock) -{ - int otid, tid = gomp_tid (); - - otid = __sync_val_compare_and_swap (&lock->owner, 0, tid); - if (otid == 0) - { - lock->count = 1; - return 1; - } - if (otid == tid) - return ++lock->count; - - return 0; -} - -ialias (omp_init_lock) -ialias (omp_init_nest_lock) -ialias (omp_destroy_lock) -ialias (omp_destroy_nest_lock) -ialias (omp_set_lock) -ialias (omp_set_nest_lock) -ialias (omp_unset_lock) -ialias (omp_unset_nest_lock) -ialias (omp_test_lock) -ialias (omp_test_nest_lock) |