我对apache有一个问题: centos 7+ directamin +定制版本nginx_apache,我今早重新启动了服务,而apache没有启动。我测试。/建立全部或只有apache..。
systemctl start httpd.service
Job for httpd.service failed. See 'systemctl status httpd.service' and 'journalctl -xn' for details.
systemctl status httpd.service
httpd.
键入systemctl重新启动httpd时,
我得到以下错误:
Job for httpd.service failed because the control process exited with error code. See "systemctl status httpd.service" and "journalctl -xe" for details.
输入systemctl状态httpd.service时en
httpd.service - The Apache HTTP Server
Loaded: loaded (/usr/lib/sys
using System;
using System.Threading;
using System.Threading.Tasks;
namespace ConsoleApp2
{
class Program
{
static void Main(string[] args)
{
Task.Run(Test);
Console.ReadKey();
}
public static async Task Test()
{
v
根据,您不应该重置dispatch_once_t isn't a good thing to do in any situation other than testing。
假设我有一段代码要确保一次不能被多个线程调用(比如加载数据)。这不是有效的代码吗:
@interface SomeClass()
{
dispatch_once_t onceToken;
}
@end
- (void) updateMethod
{
dispatch_async(dispatch_get_global_queue(0, 0), ^{
dispatch_once(&a