149 lines
3.0 KiB
C++
149 lines
3.0 KiB
C++
/*
|
|
* ThreadPrimitives.h
|
|
*
|
|
* This source file is part of the FoundationDB open source project
|
|
*
|
|
* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef FLOW_THREADPRIMITIVES_H
|
|
#define FLOW_THREADPRIMITIVES_H
|
|
#pragma once
|
|
|
|
#include "Error.h"
|
|
#include "Trace.h"
|
|
|
|
#ifdef __linux__
|
|
#include <semaphore.h>
|
|
#endif
|
|
|
|
#ifdef __APPLE__
|
|
#include <mach/mach_init.h>
|
|
#include <mach/task.h>
|
|
#include <mach/semaphore.h>
|
|
#include <mach/sync_policy.h>
|
|
#include <mach/mach_error.h>
|
|
#include <mach/clock_types.h>
|
|
#endif
|
|
|
|
#if VALGRIND
|
|
#include <drd.h>
|
|
#endif
|
|
|
|
class ThreadSpinLock {
|
|
public:
|
|
// #ifdef _WIN32
|
|
ThreadSpinLock(bool initiallyLocked=false) : isLocked(initiallyLocked) {
|
|
#if VALGRIND
|
|
ANNOTATE_RWLOCK_CREATE(this);
|
|
#endif
|
|
}
|
|
~ThreadSpinLock() {
|
|
#if VALGRIND
|
|
ANNOTATE_RWLOCK_DESTROY(this);
|
|
#endif
|
|
}
|
|
void enter() {
|
|
while (interlockedCompareExchange(&isLocked, 1, 0) == 1)
|
|
_mm_pause();
|
|
#if VALGRIND
|
|
ANNOTATE_RWLOCK_ACQUIRED(this, true);
|
|
#endif
|
|
}
|
|
void leave() {
|
|
#if defined(__linux__)
|
|
__sync_synchronize();
|
|
#endif
|
|
isLocked = 0;
|
|
#if defined(__linux__)
|
|
__sync_synchronize();
|
|
#endif
|
|
#if VALGRIND
|
|
ANNOTATE_RWLOCK_RELEASED(this, true);
|
|
#endif
|
|
}
|
|
void assertNotEntered() {
|
|
ASSERT( !isLocked );
|
|
}
|
|
private:
|
|
ThreadSpinLock(const ThreadSpinLock&);
|
|
void operator=(const ThreadSpinLock&);
|
|
volatile int32_t isLocked;
|
|
};
|
|
|
|
class ThreadSpinLockHolder {
|
|
ThreadSpinLock& lock;
|
|
public:
|
|
ThreadSpinLockHolder( ThreadSpinLock& lock ) : lock(lock) { lock.enter(); }
|
|
~ThreadSpinLockHolder() { lock.leave(); }
|
|
};
|
|
|
|
class ThreadUnsafeSpinLock { public: void enter(){}; void leave(){}; void assertNotEntered(){}; };
|
|
class ThreadUnsafeSpinLockHolder { public: ThreadUnsafeSpinLockHolder(ThreadUnsafeSpinLock&){}; };
|
|
|
|
#if FLOW_THREAD_SAFE
|
|
|
|
typedef ThreadSpinLock SpinLock;
|
|
typedef ThreadSpinLockHolder SpinLockHolder;
|
|
|
|
#else
|
|
|
|
typedef ThreadUnsafeSpinLock SpinLock;
|
|
typedef ThreadUnsafeSpinLockHolder SpinLockHolder;
|
|
|
|
#endif
|
|
|
|
class Event {
|
|
public:
|
|
Event();
|
|
~Event();
|
|
void set();
|
|
void block();
|
|
|
|
private:
|
|
#ifdef _WIN32
|
|
void* ev;
|
|
#elif defined(__linux__)
|
|
sem_t sem;
|
|
#elif defined(__APPLE__)
|
|
mach_port_t self;
|
|
semaphore_t sem;
|
|
#else
|
|
#error Port me!
|
|
#endif
|
|
};
|
|
|
|
class Mutex
|
|
{
|
|
// A re-entrant process-local blocking lock (e.g. CRITICAL_SECTION on Windows)
|
|
// Thread safe even if !FLOW_THREAD_SAFE
|
|
public:
|
|
Mutex();
|
|
~Mutex();
|
|
void enter();
|
|
void leave();
|
|
private:
|
|
void* impl;
|
|
};
|
|
|
|
class MutexHolder {
|
|
Mutex& lock;
|
|
public:
|
|
MutexHolder( Mutex& lock ) : lock(lock) { lock.enter(); }
|
|
~MutexHolder() { lock.leave(); }
|
|
};
|
|
|
|
#endif
|