blob: 59ea2b7cb97f64ea5eedf63020850677bf567b86 [file] [log] [blame]
* Copyright 2015 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#include "include/private/SkSpinlock.h"
#if 0
#include "include/private/SkMutex.h"
#include <execinfo.h>
#include <stdio.h>
static void debug_trace() {
void* stack[64];
int len = backtrace(stack, SK_ARRAY_COUNT(stack));
// As you might imagine, we can't use an SkSpinlock here...
static SkMutex lock;
SkAutoMutexExclusive locked(lock);
fprintf(stderr, "\n");
backtrace_symbols_fd(stack, len, 2/*stderr*/);
fprintf(stderr, "\n");
static void debug_trace() {}
// Renamed from "pause" to avoid conflict with function defined in unistd.h
#include <emmintrin.h>
static void do_pause() { _mm_pause(); }
static void do_pause() { /*spin*/ }
void SkSpinlock::contendedAcquire() {
// To act as a mutex, we need an acquire barrier when we acquire the lock.
while (, std::memory_order_acquire)) {