多线程 boost的读写(reader-writer)锁 背景:保护很少更新的数据结构时,c++标准库没有提供相应的功能。 例如:有个DNS条目缓存的map,基本上很少有更新,大部分都是读取,但是偶尔也会有更新,这种情况下,如果在读取的函数里加上std::mutex就过于悲观了,每次只能有一个线程读取,但是想要的效果是,多个线程可以同时读取。
1importjava.io.File;2importjava.io.FileReader;3importjava.io.IOException;4importjava.io.Reader;56publicclassReader001 {7publicstaticvoidmain(String[] args)throwsIOException {8Reader r =newFileReader(newFile("g:/java2019/file.txt"));//gbk编码的文件,内容为:123abc我爱你9intc = 0;10while((c...
上述所有方法都声明了抛出IOException,因此使用时要注意处理异常。 二、Writer抽象类 Writer是字符输出流的根类,它定义了很多方法,影响着字符输出流的行为。 Writer主要方法如下: void write(int c):将整数值为c的字符写入到输出流,c是int类型占有32位,写入过程是写入c的 16个低位,c的16个高位将被忽略。 void ...
近日,中科院分子细胞科学卓越创新中心陈勇与中科院蛋白质科学研究中心彭超研究员课题组在Nature Communications上发表题为“Global profiling of regulatory elements in the histone benzoylation pathway”的研究论文,系统研究了酿酒酵母中组蛋白Kb...
Code Issues Pull requests Discussions Read and write spreadsheet files (CSV, XLSX and ODS), in a fast and scalable way fast php csv scalable xlsx spreadsheet writer reader memory-efficient ods Updated May 26, 2022 PHP ansh / jiffyreader.com Star 3.9k Code Issues Pull requests A Browse...
package com.chy.io.original.code; import java.io.IOException; import java.io.PrintWriter; /** * 为字符输出流提供缓冲功能、提高效率。可以使用指定字符缓冲数组大小也可以使用默认字符缓冲数组大小。 */ public class BufferedWriter extends Writer { //底层字符输出流 private Writer out; //缓冲数组 private...
using System; using System.IO; class Test { public static void Main() { string path = @"c:\temp\MyTest.txt"; try { if (File.Exists(path)) { File.Delete(path); } using (StreamWriter sw = new StreamWriter(new FileStream(path, FileMode.CreateNew))) { sw.WriteLine("This"); sw....
mkdir build cd build cmake .. make install Then, you can include it from your source code: #include <readerwriterqueue/readerwriterqueue.h> Disclaimers The queue should only be used on platforms where aligned integer and pointer access is atomic; fortunately, that includes all modern processors...
FastBufferWriter.ForStructs unused An unused parameter used for enabling overload resolution based on generic constraintsType ParametersNameDescription T The type being serialized SerializeValuePreChecked(ref Byte)Serialize a byte, "pre-checked", which skips buffer checks. In debug and editor builds,...
// code path. In such cases, the Path property for // the folder will be an empty string.throw ref new Platform::FailureException(); } m_locationPath = Platform::String::Concat(path, "\\"); } Platform::Array<byte>^ BasicReaderWriter::ReadData( _In_ Platform::String^ filename ) ...