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std::mutex 加锁抛 _DEVICE_OR_RESOURCE_BUSY 异常 - C/C++ - 清泛网 - 专注C/C++及内核技术
std::mutex 加锁抛 _DEVICE_OR_RESOURCE_BUSY 异常device_or_resource_busy最近遇到一个崩溃，在 std::lock_guard<std::mutex> lock(mutex_); 的地方，抛出了_DEVICE_OR_RESOURCE_BUSY 的异常。最终查出原因是：同一个线程对同一个mutex二次加锁导致的 最近遇到...
Maximum number of items that can be serialized or deserialized in an o...
Maximum number of items that can be serialized or deserialized in an object grap报错消息：Maximum number of items that can be serialized or deserialized in an object graph is '65536'. Ch...报错消息：
Maximum number of items that can be serialized or deserialized in an object graph is '655...
解决：apache2.service: Failed to run \'start\' task: No such file or d...
解决：apache2.service: Failed to run 'start' task: No such file or directoryapache2-service-failed-to-run-start-task-no-such-file-or-directory今天重启apache2时，出现一个错误：apache2 service: Failed to run & 39;start& 39; task: No such file or directory。原因是：& 39; var tmp& 3...
error: ‘uint16_t’ does not name a type - c++1y / stl - 清泛IT社区，为创新赋能！
...; 解决。/**
* @file stdint.h
* Copyright 2012, 2013 MinGW.org project
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction,...
【解决】double free or corruption (!prev) - C/C++ - 清泛网 - 专注C/C++及内核技术
【解决】double free or corruption (!prev)double-free-or-corruption-prev*** glibc detected *** cupd: double free or corruption (!prev): 0x093b1208 ***可能原因：1、多次释放同一内存区，需要检查代码，是否出现了对同一内存区释放两 *** glibc detected *** ./cupd:...
Why is the gets function so dangerous that it should not be used?
...
In order to use gets safely, you have to know exactly how many characters you will be reading, so that you can make your buffer large enough. You will only know that if you know exactly what data you will be reading.
Instead of...
Unexpected results when working with very big integers on interpreted languages
...
Python works:
>>> sum(x for x in xrange(1000000000 + 1))
500000000500000000
Or:
>>> sum(xrange(1000000000+1))
500000000500000000
Python's int auto promotes to a Python long which supports arbitrary precision. ...
What's so wrong about using GC.Collect()?
...gh I do understand the serious implications of playing with this function (or at least that's what I think), I fail to see why it's becoming one of these things that respectable programmers wouldn't ever use, even those who don't even know what it is for.
...
What exactly is a reentrant function?
...ly executed concurrently, does it always mean that it is reentrant?
No.
For example, let's have a C++ function that takes both a lock, and a callback as a parameter:
#include <mutex>
typedef void (*callback)();
std::mutex m;
void foo(callback f)
{
m.lock();
// use the resource pro...
Should I use pt or px?
...
px ≠ Pixels
All of these answers seem to be incorrect. Contrary to intuition, in CSS the px is not pixels. At least, not in the simple physical sense.
Read this article from the W3C, EM, PX, PT, CM, IN…, about how px is a "magical" unit invented for CSS. The meaning of ...