111 lines
2.8 KiB
C++
111 lines
2.8 KiB
C++
/*
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* ThreadPrimitives.cpp
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "flow/ThreadPrimitives.h"
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#include "flow/Trace.h"
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#include <stdint.h>
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#include <iostream>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#ifdef _WIN32
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#include <windows.h>
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#undef min
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#undef max
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#endif
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extern std::string format( const char *form, ... );
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Event::Event() {
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#ifdef _WIN32
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ev = CreateEvent(nullptr, FALSE, FALSE, nullptr);
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#elif defined(__linux__) || defined(__FreeBSD__)
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int result = sem_init(&sem, 0, 0);
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if (result)
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criticalError(FDB_EXIT_INIT_SEMAPHORE, "UnableToInitializeSemaphore", format("Could not initialize semaphore - %s", strerror(errno)).c_str());
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#elif defined(__APPLE__)
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self = mach_task_self();
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kern_return_t ret = semaphore_create(self, &sem, SYNC_POLICY_FIFO, 0);
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if(ret != KERN_SUCCESS)
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criticalError(FDB_EXIT_INIT_SEMAPHORE, "UnableToInitializeSemaphore", format("Could not initialize semaphore - %s", strerror(errno)).c_str());
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#else
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#error Port me!
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#endif
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}
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Event::~Event() {
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#ifdef _WIN32
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CloseHandle(ev);
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#elif defined(__linux__) || defined(__FreeBSD__)
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sem_destroy(&sem);
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#elif defined(__APPLE__)
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semaphore_destroy(self, sem);
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#else
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#error Port me!
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#endif
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}
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void Event::set() {
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#ifdef _WIN32
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SetEvent(ev);
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#elif defined(__linux__) || defined(__FreeBSD__)
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sem_post(&sem);
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#elif defined(__APPLE__)
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semaphore_signal(sem);
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#else
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#error Port me!
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#endif
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}
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void Event::block() {
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#ifdef _WIN32
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WaitForSingleObject(ev, INFINITE);
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#elif defined(__linux__) || defined(__FreeBSD__)
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int ret;
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do {
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ret = sem_wait(&sem);
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} while (ret != 0 && errno == EINTR);
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#elif defined(__APPLE__)
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kern_return_t ret;
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do {
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ret = semaphore_wait(sem);
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} while ((ret != KERN_SUCCESS) && (ret != KERN_TERMINATED));
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#else
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#error Port me!
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#endif
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}
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// Mutex::impl is allocated from the heap so that its size doesn't need to be in the header. Is there a better way?
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Mutex::Mutex() {
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impl = new CRITICAL_SECTION;
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InitializeCriticalSection((CRITICAL_SECTION*)impl);
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}
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Mutex::~Mutex() {
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DeleteCriticalSection((CRITICAL_SECTION*)impl);
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delete (CRITICAL_SECTION*)impl;
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}
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void Mutex::enter() {
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EnterCriticalSection((CRITICAL_SECTION*)impl);
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}
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void Mutex::leave() {
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LeaveCriticalSection((CRITICAL_SECTION*)impl);
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}
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