blob: fb1ac8f368a6aa73c54c9fe30ae91313a7796bac [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// The purpose of this file is to supply the macro definintions necessary
// to make third_party/dmg_fp/ threadsafe.
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/synchronization/lock.h"
// We need two locks because they're sometimes grabbed at the same time.
// A single lock would lead to an attempted recursive grab.
static base::LazyInstance<base::Lock>::Leaky
static base::LazyInstance<base::Lock>::Leaky
* This define and the code below is to trigger thread-safe behavior
* in, per this comment from the file:
* #define MULTIPLE_THREADS if the system offers preemptively scheduled
* multiple threads. In this case, you must provide (or suitably
* #define) two locks, acquired by ACQUIRE_DTOA_LOCK(n) and freed
* by FREE_DTOA_LOCK(n) for n = 0 or 1. (The second lock, accessed
* in pow5mult, ensures lazy evaluation of only one copy of high
* powers of 5; omitting this lock would introduce a small
* probability of wasting memory, but would otherwise be harmless.)
* You must also invoke freedtoa(s) to free the value s returned by
* dtoa. You may do so whether or not MULTIPLE_THREADS is #defined.
inline static void ACQUIRE_DTOA_LOCK(size_t n) {
DCHECK(n < 2);
base::Lock* lock = n == 0 ? dtoa_lock_0.Pointer() : dtoa_lock_1.Pointer();
inline static void FREE_DTOA_LOCK(size_t n) {
DCHECK(n < 2);
base::Lock* lock = n == 0 ? dtoa_lock_0.Pointer() : dtoa_lock_1.Pointer();
#include "base/third_party/dmg_fp/"
#undef Bias // Avoid windows jumbo build breakage.
#undef Long // To avoid breaking jni code in jumbo builds