大约有 24,000 项符合查询结果（耗时：0.0121秒） [XML]
How do function pointers in C work?
...ring function is called in order to set up the function pointers to their respective functions:
String newString()
{
String self = (String)malloc(sizeof(struct String_Struct));
self->get = &getString;
self->set = &setString;
self->length = &lengthString;
s...
【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛，有思想、有深度
...包括：低功耗，使用纽扣电池就可以运行数月至数年。快连接，毫秒级的连接速度，传统蓝牙甚至长达数分钟。远距离，长达数百米的通信距离，而传统蓝牙通常10米左右。
蓝牙联盟沿用经典蓝牙的规范内容，为低功耗蓝牙定...
Http长连接200万尝试及调优 - 更多技术 - 清泛网 - 专注C/C++及内核技术
Http长连接200万尝试及调优对于一个server，我们一般考虑他所能支撑的qps，但有那么一种应用， 我们需要关注的是它能支撑的连接数个数，而并非qps，当然qps也是我们...对于一个server，我们一般考虑他所能支撑的qps，但有那么一...
深入理解 x86/x64 的中断体系 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
... 中断（可屏蔽中断）。它的逻辑 C 描述为：
*(--esp) = eflags; /* push eflags */
if (gate_descriptor.type == INTERRUPT_GATE)
eflags.IF = 0; /* clear eflags.IF */
interrupt handler 使用 iret 指令返...
What are the calling conventions for UNIX & Linux system calls (and user-space functions) on i386 an
...ons of the i386 System V ABI (used on Linux) require 16-byte alignment of %esp before a call, like the x86-64 System V ABI has always required. Callees are allowed to assume that and use SSE 16-byte loads/stores that fault on unaligned. But historically, Linux only required 4-byte stack alignment,...
BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
...别是37、38、39，用于发现设备（Scanning devices）、初始化连接（initiating a connection）和广播数据（broadcasting date）；
剩下的37个信道为data channel（数据通道），用于两个连接的设备间的通讯。
0x2 BLE数据包格式在低功耗蓝牙规范中...
PHP连接MySQL报错：Fatal error: Call to undefined function mysql_connec...
PHP连接MySQL报错：Fatal error: Call to undefined function mysql_connect()之解决方法【问题描述】PHP测试连接MySQL的程序如下：<?php$host='localhost';$user_name='root';$password='mysql';$conn=m...【问题描述】
PHP测试连接MySQL的程序如下：
<?php
$host='localh...
Explain the concept of a stack frame in a nutshell
... stack is composed of 1 or many several stack frames. Each stack frame corresponds to a call to a function or procedure which has not yet terminated with a return.
To use a stack frame, a thread keeps two pointers, one is called the Stack Pointer (SP), and the other is called the Frame Pointer (FP...
How to recognize USB devices in Virtualbox running on a Linux host? [closed]
...
I had a similar problem trying to connect my ESP8266 and ESP32 to a VirtualBox, this worked for me, thanks all. 1) sudo adduser $USER vboxusers 2) VirtualBox 6.1.6 Oracle VM ...
CoInitialize浅析一 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...69B2A26 push ebp
769B2A27 mov ebp, esp
769B2A29 push 2 ; dwCoInit
769B2A2B push [ebp+8] ; pvReserved
769B2A2E call _CoInitializeEx@8 ; CoInitializeEx(x,x)
769B2A33 pop ...