| /* Copyright (c) 2009, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * --- |
| * This file is a Posix-specific part of spinlock_internal.cc |
| */ |
| |
| #include <config.h> |
| #include <errno.h> |
| #ifdef HAVE_SCHED_H |
| #include <sched.h> /* For sched_yield() */ |
| #endif |
| #include <time.h> /* For nanosleep() */ |
| |
| namespace base { |
| namespace internal { |
| |
| void SpinLockDelay(volatile Atomic32 *w, int32 value, int loop) { |
| int save_errno = errno; |
| if (loop == 0) { |
| } else if (loop == 1) { |
| sched_yield(); |
| } else { |
| struct timespec tm; |
| tm.tv_sec = 0; |
| tm.tv_nsec = base::internal::SuggestedDelayNS(loop); |
| nanosleep(&tm, NULL); |
| } |
| errno = save_errno; |
| } |
| |
| void SpinLockWake(volatile Atomic32 *w, bool all) { |
| } |
| |
| } // namespace internal |
| } // namespace base |
